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From elecha...@apache.org
Subject svn commit: r874484 [36/45] - in /websites/production/directory/content/mavibot/gen-docs: ./ 1.0.0-M1/ 1.0.0-M1/apidocs/ 1.0.0-M1/apidocs/org/ 1.0.0-M1/apidocs/org/apache/ 1.0.0-M1/apidocs/org/apache/directory/ 1.0.0-M1/apidocs/org/apache/directory/mav...
Date Tue, 13 Aug 2013 15:42:17 GMT
Added: websites/production/directory/content/mavibot/gen-docs/1.0.0-M1/xref/org/apache/directory/mavibot/btree/RecordManager.html
==============================================================================
--- websites/production/directory/content/mavibot/gen-docs/1.0.0-M1/xref/org/apache/directory/mavibot/btree/RecordManager.html (added)
+++ websites/production/directory/content/mavibot/gen-docs/1.0.0-M1/xref/org/apache/directory/mavibot/btree/RecordManager.html Tue Aug 13 15:42:13 2013
@@ -0,0 +1,2800 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
+<head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
+<title>RecordManager xref</title>
+<link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" />
+</head>
+<body>
+<div id="overview"><a href="../../../../../../apidocs/org/apache/directory/mavibot/btree/RecordManager.html">View Javadoc</a></div><pre>
+
+<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
+<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> *  Licensed to the Apache Software Foundation (ASF) under one</em>
+<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *  or more contributor license agreements.  See the NOTICE file</em>
+<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> *  distributed with this work for additional information</em>
+<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> *  regarding copyright ownership.  The ASF licenses this file</em>
+<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> *  to you under the Apache License, Version 2.0 (the</em>
+<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *  "License"); you may not use this file except in compliance</em>
+<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *  with the License.  You may obtain a copy of the License at</em>
+<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> *    <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
+<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> *  Unless required by applicable law or agreed to in writing,</em>
+<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> *  software distributed under the License is distributed on an</em>
+<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
+<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> *  KIND, either express or implied.  See the License for the</em>
+<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment"> *  specific language governing permissions and limitations</em>
+<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> *  under the License.</em>
+<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> */</em>
+<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">package</strong> org.apache.directory.mavibot.btree;
+<a class="jxr_linenumber" name="21" href="#21">21</a>  
+<a class="jxr_linenumber" name="22" href="#22">22</a>  
+<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.io.File;
+<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.io.IOException;
+<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.io.RandomAccessFile;
+<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.nio.ByteBuffer;
+<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.nio.channels.FileChannel;
+<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
+<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> java.util.HashSet;
+<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> java.util.LinkedHashMap;
+<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> java.util.List;
+<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> java.util.Map;
+<a class="jxr_linenumber" name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
+<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicLong;
+<a class="jxr_linenumber" name="35" href="#35">35</a>  
+<a class="jxr_linenumber" name="36" href="#36">36</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.exception.BTreeAlreadyManagedException;
+<a class="jxr_linenumber" name="37" href="#37">37</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.exception.EndOfFileExceededException;
+<a class="jxr_linenumber" name="38" href="#38">38</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.exception.KeyNotFoundException;
+<a class="jxr_linenumber" name="39" href="#39">39</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.serializer.ElementSerializer;
+<a class="jxr_linenumber" name="40" href="#40">40</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.serializer.IntSerializer;
+<a class="jxr_linenumber" name="41" href="#41">41</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.serializer.LongArraySerializer;
+<a class="jxr_linenumber" name="42" href="#42">42</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.serializer.LongSerializer;
+<a class="jxr_linenumber" name="43" href="#43">43</a>  <strong class="jxr_keyword">import</strong> org.apache.directory.mavibot.btree.util.Strings;
+<a class="jxr_linenumber" name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.slf4j.Logger;
+<a class="jxr_linenumber" name="45" href="#45">45</a>  <strong class="jxr_keyword">import</strong> org.slf4j.LoggerFactory;
+<a class="jxr_linenumber" name="46" href="#46">46</a>  
+<a class="jxr_linenumber" name="47" href="#47">47</a>  
+<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> * The RecordManager is used to manage the file in which we will store the BTrees. </em>
+<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> * A RecordManager will manage more than one BTree.&lt;br/&gt;</em>
+<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * </em>
+<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> * It stores data in fixed size pages (default size is 512 bytes), which may be linked one to </em>
+<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> * the other if the data we want to store is too big for a page.</em>
+<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> *  </em>
+<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="mailto:labs@labs.apache.org" target="alexandria_uri">mailto:labs@labs.apache.org</a>"&gt;Mavibot labs Project&lt;/a&gt;</em>
+<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="57" href="#57">57</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/directory/mavibot/btree/RecordManager.html">RecordManager</a>
+<a class="jxr_linenumber" name="58" href="#58">58</a>  {
+<a class="jxr_linenumber" name="59" href="#59">59</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The LoggerFactory used by this class */</em>
+<a class="jxr_linenumber" name="60" href="#60">60</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger LOG = LoggerFactory.getLogger( RecordManager.<strong class="jxr_keyword">class</strong> );
+<a class="jxr_linenumber" name="61" href="#61">61</a>  
+<a class="jxr_linenumber" name="62" href="#62">62</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A dedicated logger for the check */</em>
+<a class="jxr_linenumber" name="63" href="#63">63</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger LOG_CHECK = LoggerFactory.getLogger( <span class="jxr_string">"RM_CHECK"</span> );
+<a class="jxr_linenumber" name="64" href="#64">64</a>  
+<a class="jxr_linenumber" name="65" href="#65">65</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The associated file */</em>
+<a class="jxr_linenumber" name="66" href="#66">66</a>      <strong class="jxr_keyword">private</strong> File file;
+<a class="jxr_linenumber" name="67" href="#67">67</a>  
+<a class="jxr_linenumber" name="68" href="#68">68</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The channel used to read and write data */</em>
+<a class="jxr_linenumber" name="69" href="#69">69</a>      <strong class="jxr_keyword">private</strong> FileChannel fileChannel;
+<a class="jxr_linenumber" name="70" href="#70">70</a>  
+<a class="jxr_linenumber" name="71" href="#71">71</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The number of stored BTrees */</em>
+<a class="jxr_linenumber" name="72" href="#72">72</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> nbBtree;
+<a class="jxr_linenumber" name="73" href="#73">73</a>  
+<a class="jxr_linenumber" name="74" href="#74">74</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The first and last free page */</em>
+<a class="jxr_linenumber" name="75" href="#75">75</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">long</strong> firstFreePage;
+<a class="jxr_linenumber" name="76" href="#76">76</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">long</strong> lastFreePage;
+<a class="jxr_linenumber" name="77" href="#77">77</a>  
+<a class="jxr_linenumber" name="78" href="#78">78</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The list of available free pages */</em>
+<a class="jxr_linenumber" name="79" href="#79">79</a>      List&lt;PageIO&gt; freePages = <strong class="jxr_keyword">new</strong> ArrayList&lt;PageIO&gt;();
+<a class="jxr_linenumber" name="80" href="#80">80</a>  
+<a class="jxr_linenumber" name="81" href="#81">81</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A counter to track the number of free pages */</em>
+<a class="jxr_linenumber" name="82" href="#82">82</a>      <strong class="jxr_keyword">public</strong> AtomicLong nbFreedPages = <strong class="jxr_keyword">new</strong> AtomicLong( 0 );
+<a class="jxr_linenumber" name="83" href="#83">83</a>      <strong class="jxr_keyword">public</strong> AtomicLong nbCreatedPages = <strong class="jxr_keyword">new</strong> AtomicLong( 0 );
+<a class="jxr_linenumber" name="84" href="#84">84</a>      <strong class="jxr_keyword">public</strong> AtomicLong nbReusedPages = <strong class="jxr_keyword">new</strong> AtomicLong( 0 );
+<a class="jxr_linenumber" name="85" href="#85">85</a>  
+<a class="jxr_linenumber" name="86" href="#86">86</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The offset of the end of the file */</em>
+<a class="jxr_linenumber" name="87" href="#87">87</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">long</strong> endOfFileOffset;
+<a class="jxr_linenumber" name="88" href="#88">88</a>  
+<a class="jxr_linenumber" name="89" href="#89">89</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> </em>
+<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment">     * A Btree used to manage the page that has been copied in a new version.</em>
+<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment">     * Those pages can be reclaimed when the associated version is dead. </em>
+<a class="jxr_linenumber" name="92" href="#92">92</a>  <em class="jxr_javadoccomment">     **/</em>
+<a class="jxr_linenumber" name="93" href="#93">93</a>      <strong class="jxr_keyword">private</strong> BTree&lt;RevisionName, <strong class="jxr_keyword">long</strong>[]&gt; copiedPageBTree;
+<a class="jxr_linenumber" name="94" href="#94">94</a>  
+<a class="jxr_linenumber" name="95" href="#95">95</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a> used to store all the valid revisions for all the stored BTrees */</em>
+<a class="jxr_linenumber" name="96" href="#96">96</a>      <strong class="jxr_keyword">private</strong> BTree&lt;RevisionName, Long&gt; revisionBTree;
+<a class="jxr_linenumber" name="97" href="#97">97</a>  
+<a class="jxr_linenumber" name="98" href="#98">98</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A constant for an offset on a non existing page */</em>
+<a class="jxr_linenumber" name="99" href="#99">99</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> NO_PAGE = -1L;
+<a class="jxr_linenumber" name="100" href="#100">100</a> 
+<a class="jxr_linenumber" name="101" href="#101">101</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The number of stored BTrees */</em>
+<a class="jxr_linenumber" name="102" href="#102">102</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> NB_TREE_SIZE = 4;
+<a class="jxr_linenumber" name="103" href="#103">103</a> 
+<a class="jxr_linenumber" name="104" href="#104">104</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The header page size */</em>
+<a class="jxr_linenumber" name="105" href="#105">105</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> PAGE_SIZE = 4;
+<a class="jxr_linenumber" name="106" href="#106">106</a> 
+<a class="jxr_linenumber" name="107" href="#107">107</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The size of the data size in a page */</em>
+<a class="jxr_linenumber" name="108" href="#108">108</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DATA_SIZE = 4;
+<a class="jxr_linenumber" name="109" href="#109">109</a> 
+<a class="jxr_linenumber" name="110" href="#110">110</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The size of the link to next page */</em>
+<a class="jxr_linenumber" name="111" href="#111">111</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> LINK_SIZE = 8;
+<a class="jxr_linenumber" name="112" href="#112">112</a> 
+<a class="jxr_linenumber" name="113" href="#113">113</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Some constants */</em>
+<a class="jxr_linenumber" name="114" href="#114">114</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BYTE_SIZE = 1;
+<a class="jxr_linenumber" name="115" href="#115">115</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> INT_SIZE = 4;
+<a class="jxr_linenumber" name="116" href="#116">116</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> LONG_SIZE = 8;
+<a class="jxr_linenumber" name="117" href="#117">117</a> 
+<a class="jxr_linenumber" name="118" href="#118">118</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The size of the link to the first and last free page */</em>
+<a class="jxr_linenumber" name="119" href="#119">119</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> FIRST_FREE_PAGE_SIZE = 8;
+<a class="jxr_linenumber" name="120" href="#120">120</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> LAST_FREE_PAGE_SIZE = 8;
+<a class="jxr_linenumber" name="121" href="#121">121</a> 
+<a class="jxr_linenumber" name="122" href="#122">122</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The default page size */</em>
+<a class="jxr_linenumber" name="123" href="#123">123</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DEFAULT_PAGE_SIZE = 512;
+<a class="jxr_linenumber" name="124" href="#124">124</a> 
+<a class="jxr_linenumber" name="125" href="#125">125</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The header size */</em>
+<a class="jxr_linenumber" name="126" href="#126">126</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> HEADER_SIZE = DEFAULT_PAGE_SIZE;
+<a class="jxr_linenumber" name="127" href="#127">127</a> 
+<a class="jxr_linenumber" name="128" href="#128">128</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A global buffer used to store the header */</em>
+<a class="jxr_linenumber" name="129" href="#129">129</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> ByteBuffer HEADER_BUFFER;
+<a class="jxr_linenumber" name="130" href="#130">130</a> 
+<a class="jxr_linenumber" name="131" href="#131">131</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The <a href="../../../../../org/apache/directory/mavibot/btree/RecordManager.html">RecordManager</a> underlying page size. */</em>
+<a class="jxr_linenumber" name="132" href="#132">132</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> pageSize = DEFAULT_PAGE_SIZE;
+<a class="jxr_linenumber" name="133" href="#133">133</a> 
+<a class="jxr_linenumber" name="134" href="#134">134</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The set of managed BTrees */</em>
+<a class="jxr_linenumber" name="135" href="#135">135</a>     <strong class="jxr_keyword">private</strong> Map&lt;String, BTree&lt;?, ?&gt;&gt; managedBTrees;
+<a class="jxr_linenumber" name="136" href="#136">136</a> 
+<a class="jxr_linenumber" name="137" href="#137">137</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The offset on the last added <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a> */</em>
+<a class="jxr_linenumber" name="138" href="#138">138</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">long</strong> lastAddedBTreeOffset = NO_PAGE;
+<a class="jxr_linenumber" name="139" href="#139">139</a> 
+<a class="jxr_linenumber" name="140" href="#140">140</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The default file name */</em>
+<a class="jxr_linenumber" name="141" href="#141">141</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String DEFAULT_FILE_NAME = <span class="jxr_string">"mavibot.db"</span>;
+<a class="jxr_linenumber" name="142" href="#142">142</a> 
+<a class="jxr_linenumber" name="143" href="#143">143</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A deserializer for Offsets */</em>
+<a class="jxr_linenumber" name="144" href="#144">144</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/directory/mavibot/btree/serializer/LongSerializer.html">LongSerializer</a> OFFSET_SERIALIZER = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/serializer/LongSerializer.html">LongSerializer</a>();
+<a class="jxr_linenumber" name="145" href="#145">145</a> 
+<a class="jxr_linenumber" name="146" href="#146">146</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String REVISION_BTREE_NAME = <span class="jxr_string">"_revisionBTree_"</span>;
+<a class="jxr_linenumber" name="147" href="#147">147</a> 
+<a class="jxr_linenumber" name="148" href="#148">148</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String COPIED_PAGE_BTREE_NAME = <span class="jxr_string">"_copiedPageBTree_"</span>;
+<a class="jxr_linenumber" name="149" href="#149">149</a> 
+<a class="jxr_linenumber" name="150" href="#150">150</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A flag set to true if we want to keep old revisions */</em>
+<a class="jxr_linenumber" name="151" href="#151">151</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> keepRevisions;
+<a class="jxr_linenumber" name="152" href="#152">152</a> 
+<a class="jxr_linenumber" name="153" href="#153">153</a> 
+<a class="jxr_linenumber" name="154" href="#154">154</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="155" href="#155">155</a> <em class="jxr_javadoccomment">     * Create a Record manager which will either create the underlying file</em>
+<a class="jxr_linenumber" name="156" href="#156">156</a> <em class="jxr_javadoccomment">     * or load an existing one. If a folder is provided, then we will create</em>
+<a class="jxr_linenumber" name="157" href="#157">157</a> <em class="jxr_javadoccomment">     * a file with a default name : mavibot.db</em>
+<a class="jxr_linenumber" name="158" href="#158">158</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="159" href="#159">159</a> <em class="jxr_javadoccomment">     * @param name The file name, or a folder name</em>
+<a class="jxr_linenumber" name="160" href="#160">160</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="161" href="#161">161</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/RecordManager.html">RecordManager</a>( String fileName )
+<a class="jxr_linenumber" name="162" href="#162">162</a>     {
+<a class="jxr_linenumber" name="163" href="#163">163</a>         <strong class="jxr_keyword">this</strong>( fileName, DEFAULT_PAGE_SIZE );
+<a class="jxr_linenumber" name="164" href="#164">164</a>     }
+<a class="jxr_linenumber" name="165" href="#165">165</a> 
+<a class="jxr_linenumber" name="166" href="#166">166</a> 
+<a class="jxr_linenumber" name="167" href="#167">167</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment">     * Create a Record manager which will either create the underlying file</em>
+<a class="jxr_linenumber" name="169" href="#169">169</a> <em class="jxr_javadoccomment">     * or load an existing one. If a folder is provider, then we will create</em>
+<a class="jxr_linenumber" name="170" href="#170">170</a> <em class="jxr_javadoccomment">     * a file with a default name : mavibot.db</em>
+<a class="jxr_linenumber" name="171" href="#171">171</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="172" href="#172">172</a> <em class="jxr_javadoccomment">     * @param name The file name, or a folder name</em>
+<a class="jxr_linenumber" name="173" href="#173">173</a> <em class="jxr_javadoccomment">     * @param pageSize the size of a page on disk</em>
+<a class="jxr_linenumber" name="174" href="#174">174</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="175" href="#175">175</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/RecordManager.html">RecordManager</a>( String fileName, <strong class="jxr_keyword">int</strong> pageSize )
+<a class="jxr_linenumber" name="176" href="#176">176</a>     {
+<a class="jxr_linenumber" name="177" href="#177">177</a>         managedBTrees = <strong class="jxr_keyword">new</strong> LinkedHashMap&lt;String, BTree&lt;?, ?&gt;&gt;();
+<a class="jxr_linenumber" name="178" href="#178">178</a> 
+<a class="jxr_linenumber" name="179" href="#179">179</a>         HEADER_BUFFER = ByteBuffer.allocate( pageSize );
+<a class="jxr_linenumber" name="180" href="#180">180</a>         HEADER_SIZE = pageSize;
+<a class="jxr_linenumber" name="181" href="#181">181</a> 
+<a class="jxr_linenumber" name="182" href="#182">182</a>         <em class="jxr_comment">// Open the file or create it</em>
+<a class="jxr_linenumber" name="183" href="#183">183</a>         File tmpFile = <strong class="jxr_keyword">new</strong> File( fileName );
+<a class="jxr_linenumber" name="184" href="#184">184</a>         <strong class="jxr_keyword">boolean</strong> isNewFile = false;
+<a class="jxr_linenumber" name="185" href="#185">185</a> 
+<a class="jxr_linenumber" name="186" href="#186">186</a>         <strong class="jxr_keyword">if</strong> ( tmpFile.isDirectory() )
+<a class="jxr_linenumber" name="187" href="#187">187</a>         {
+<a class="jxr_linenumber" name="188" href="#188">188</a>             <em class="jxr_comment">// It's a directory. Check that we don't have an existing mavibot file</em>
+<a class="jxr_linenumber" name="189" href="#189">189</a>             File mavibotFile = <strong class="jxr_keyword">new</strong> File( tmpFile, DEFAULT_FILE_NAME );
+<a class="jxr_linenumber" name="190" href="#190">190</a> 
+<a class="jxr_linenumber" name="191" href="#191">191</a>             <strong class="jxr_keyword">if</strong> ( !mavibotFile.exists() )
+<a class="jxr_linenumber" name="192" href="#192">192</a>             {
+<a class="jxr_linenumber" name="193" href="#193">193</a>                 <em class="jxr_comment">// We have to create a new file</em>
+<a class="jxr_linenumber" name="194" href="#194">194</a>                 <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="195" href="#195">195</a>                 {
+<a class="jxr_linenumber" name="196" href="#196">196</a>                     mavibotFile.createNewFile();
+<a class="jxr_linenumber" name="197" href="#197">197</a>                     isNewFile = <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="198" href="#198">198</a>                 }
+<a class="jxr_linenumber" name="199" href="#199">199</a>                 <strong class="jxr_keyword">catch</strong> ( IOException ioe )
+<a class="jxr_linenumber" name="200" href="#200">200</a>                 {
+<a class="jxr_linenumber" name="201" href="#201">201</a>                     LOG.error( <span class="jxr_string">"Cannot create the file {}"</span>, mavibotFile.getName() );
+<a class="jxr_linenumber" name="202" href="#202">202</a>                     <strong class="jxr_keyword">return</strong>;
+<a class="jxr_linenumber" name="203" href="#203">203</a>                 }
+<a class="jxr_linenumber" name="204" href="#204">204</a>             }
+<a class="jxr_linenumber" name="205" href="#205">205</a> 
+<a class="jxr_linenumber" name="206" href="#206">206</a>             file = mavibotFile;
+<a class="jxr_linenumber" name="207" href="#207">207</a>         }
+<a class="jxr_linenumber" name="208" href="#208">208</a>         <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="209" href="#209">209</a>         {
+<a class="jxr_linenumber" name="210" href="#210">210</a>             <em class="jxr_comment">// It's a file. Let's see if it exists, otherwise create it</em>
+<a class="jxr_linenumber" name="211" href="#211">211</a>             <strong class="jxr_keyword">if</strong> ( !tmpFile.exists() || ( tmpFile.length() == 0 ) )
+<a class="jxr_linenumber" name="212" href="#212">212</a>             {
+<a class="jxr_linenumber" name="213" href="#213">213</a>                 isNewFile = <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="214" href="#214">214</a> 
+<a class="jxr_linenumber" name="215" href="#215">215</a>                 <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="216" href="#216">216</a>                 {
+<a class="jxr_linenumber" name="217" href="#217">217</a>                     tmpFile.createNewFile();
+<a class="jxr_linenumber" name="218" href="#218">218</a>                 }
+<a class="jxr_linenumber" name="219" href="#219">219</a>                 <strong class="jxr_keyword">catch</strong> ( IOException ioe )
+<a class="jxr_linenumber" name="220" href="#220">220</a>                 {
+<a class="jxr_linenumber" name="221" href="#221">221</a>                     LOG.error( <span class="jxr_string">"Cannot create the file {}"</span>, tmpFile.getName() );
+<a class="jxr_linenumber" name="222" href="#222">222</a>                     <strong class="jxr_keyword">return</strong>;
+<a class="jxr_linenumber" name="223" href="#223">223</a>                 }
+<a class="jxr_linenumber" name="224" href="#224">224</a>             }
+<a class="jxr_linenumber" name="225" href="#225">225</a> 
+<a class="jxr_linenumber" name="226" href="#226">226</a>             file = tmpFile;
+<a class="jxr_linenumber" name="227" href="#227">227</a>         }
+<a class="jxr_linenumber" name="228" href="#228">228</a> 
+<a class="jxr_linenumber" name="229" href="#229">229</a>         <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="230" href="#230">230</a>         {
+<a class="jxr_linenumber" name="231" href="#231">231</a>             RandomAccessFile randomFile = <strong class="jxr_keyword">new</strong> RandomAccessFile( file, <span class="jxr_string">"rw"</span> );
+<a class="jxr_linenumber" name="232" href="#232">232</a>             fileChannel = randomFile.getChannel();
+<a class="jxr_linenumber" name="233" href="#233">233</a> 
+<a class="jxr_linenumber" name="234" href="#234">234</a>             <em class="jxr_comment">// get the current end of file offset</em>
+<a class="jxr_linenumber" name="235" href="#235">235</a>             endOfFileOffset = fileChannel.size();
+<a class="jxr_linenumber" name="236" href="#236">236</a> 
+<a class="jxr_linenumber" name="237" href="#237">237</a>             <strong class="jxr_keyword">if</strong> ( isNewFile )
+<a class="jxr_linenumber" name="238" href="#238">238</a>             {
+<a class="jxr_linenumber" name="239" href="#239">239</a>                 <strong class="jxr_keyword">this</strong>.pageSize = pageSize;
+<a class="jxr_linenumber" name="240" href="#240">240</a>                 initRecordManager();
+<a class="jxr_linenumber" name="241" href="#241">241</a>             }
+<a class="jxr_linenumber" name="242" href="#242">242</a>             <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="243" href="#243">243</a>             {
+<a class="jxr_linenumber" name="244" href="#244">244</a>                 loadRecordManager();
+<a class="jxr_linenumber" name="245" href="#245">245</a>             }
+<a class="jxr_linenumber" name="246" href="#246">246</a>         }
+<a class="jxr_linenumber" name="247" href="#247">247</a>         <strong class="jxr_keyword">catch</strong> ( Exception e )
+<a class="jxr_linenumber" name="248" href="#248">248</a>         {
+<a class="jxr_linenumber" name="249" href="#249">249</a>             LOG.error( <span class="jxr_string">"Error while initializing the RecordManager : {}"</span>, e.getMessage() );
+<a class="jxr_linenumber" name="250" href="#250">250</a>             LOG.error( <span class="jxr_string">""</span>, e );
+<a class="jxr_linenumber" name="251" href="#251">251</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException( e );
+<a class="jxr_linenumber" name="252" href="#252">252</a>         }
+<a class="jxr_linenumber" name="253" href="#253">253</a>     }
+<a class="jxr_linenumber" name="254" href="#254">254</a> 
+<a class="jxr_linenumber" name="255" href="#255">255</a> 
+<a class="jxr_linenumber" name="256" href="#256">256</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="257" href="#257">257</a> <em class="jxr_javadoccomment">     * We will create a brand new RecordManager file, containing nothing, but the header, </em>
+<a class="jxr_linenumber" name="258" href="#258">258</a> <em class="jxr_javadoccomment">     * a BTree to manage the old revisions we want to keep and</em>
+<a class="jxr_linenumber" name="259" href="#259">259</a> <em class="jxr_javadoccomment">     * a BTree used to manage pages associated with old versions.</em>
+<a class="jxr_linenumber" name="260" href="#260">260</a> <em class="jxr_javadoccomment">     * &lt;br/&gt;</em>
+<a class="jxr_linenumber" name="261" href="#261">261</a> <em class="jxr_javadoccomment">     * The Header contains the following details :</em>
+<a class="jxr_linenumber" name="262" href="#262">262</a> <em class="jxr_javadoccomment">     * &lt;pre&gt;</em>
+<a class="jxr_linenumber" name="263" href="#263">263</a> <em class="jxr_javadoccomment">     * +-----------+</em>
+<a class="jxr_linenumber" name="264" href="#264">264</a> <em class="jxr_javadoccomment">     * | PageSize  | 4 bytes : The size of a physical page (default to 4096)</em>
+<a class="jxr_linenumber" name="265" href="#265">265</a> <em class="jxr_javadoccomment">     * +-----------+</em>
+<a class="jxr_linenumber" name="266" href="#266">266</a> <em class="jxr_javadoccomment">     * |  NbTree   | 4 bytes : The number of managed BTrees (at least 1)</em>
+<a class="jxr_linenumber" name="267" href="#267">267</a> <em class="jxr_javadoccomment">     * +-----------+ </em>
+<a class="jxr_linenumber" name="268" href="#268">268</a> <em class="jxr_javadoccomment">     * | FirstFree | 8 bytes : The offset of the first free page</em>
+<a class="jxr_linenumber" name="269" href="#269">269</a> <em class="jxr_javadoccomment">     * +-----------+</em>
+<a class="jxr_linenumber" name="270" href="#270">270</a> <em class="jxr_javadoccomment">     * | LastFree  | 8 bytes : The offset of the last free page</em>
+<a class="jxr_linenumber" name="271" href="#271">271</a> <em class="jxr_javadoccomment">     * +-----------+</em>
+<a class="jxr_linenumber" name="272" href="#272">272</a> <em class="jxr_javadoccomment">     * &lt;/pre&gt;</em>
+<a class="jxr_linenumber" name="273" href="#273">273</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="274" href="#274">274</a> <em class="jxr_javadoccomment">     * We then store the BTree managing the pages that have been copied when we have added</em>
+<a class="jxr_linenumber" name="275" href="#275">275</a> <em class="jxr_javadoccomment">     * or deleted an element in the BTree. They are associated with a version.</em>
+<a class="jxr_linenumber" name="276" href="#276">276</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="277" href="#277">277</a> <em class="jxr_javadoccomment">     * Last, we add the bTree that keep a track on each revision we can have access to.</em>
+<a class="jxr_linenumber" name="278" href="#278">278</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="279" href="#279">279</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> initRecordManager() <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="280" href="#280">280</a>     {
+<a class="jxr_linenumber" name="281" href="#281">281</a>         <em class="jxr_comment">// Create a new Header</em>
+<a class="jxr_linenumber" name="282" href="#282">282</a>         nbBtree = 0;
+<a class="jxr_linenumber" name="283" href="#283">283</a>         firstFreePage = NO_PAGE;
+<a class="jxr_linenumber" name="284" href="#284">284</a>         lastFreePage = NO_PAGE;
+<a class="jxr_linenumber" name="285" href="#285">285</a>         updateRecordManagerHeader();
+<a class="jxr_linenumber" name="286" href="#286">286</a> 
+<a class="jxr_linenumber" name="287" href="#287">287</a>         <em class="jxr_comment">// Set the offset of the end of the file</em>
+<a class="jxr_linenumber" name="288" href="#288">288</a>         endOfFileOffset = fileChannel.size();
+<a class="jxr_linenumber" name="289" href="#289">289</a> 
+<a class="jxr_linenumber" name="290" href="#290">290</a>         <em class="jxr_comment">// Now, initialize the Copied Page BTree</em>
+<a class="jxr_linenumber" name="291" href="#291">291</a>         copiedPageBTree = <strong class="jxr_keyword">new</strong> BTree&lt;RevisionName, <strong class="jxr_keyword">long</strong>[]&gt;( COPIED_PAGE_BTREE_NAME, <strong class="jxr_keyword">new</strong> RevisionNameSerializer(),
+<a class="jxr_linenumber" name="292" href="#292">292</a>             <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/serializer/LongArraySerializer.html">LongArraySerializer</a>() );
+<a class="jxr_linenumber" name="293" href="#293">293</a> 
+<a class="jxr_linenumber" name="294" href="#294">294</a>         <em class="jxr_comment">// and initialize the Revision BTree</em>
+<a class="jxr_linenumber" name="295" href="#295">295</a>         revisionBTree = <strong class="jxr_keyword">new</strong> BTree&lt;RevisionName, Long&gt;( REVISION_BTREE_NAME, <strong class="jxr_keyword">new</strong> RevisionNameSerializer(),
+<a class="jxr_linenumber" name="296" href="#296">296</a>             <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/serializer/LongSerializer.html">LongSerializer</a>() );
+<a class="jxr_linenumber" name="297" href="#297">297</a> 
+<a class="jxr_linenumber" name="298" href="#298">298</a>         <em class="jxr_comment">// Inject these BTrees into the RecordManager</em>
+<a class="jxr_linenumber" name="299" href="#299">299</a>         <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="300" href="#300">300</a>         {
+<a class="jxr_linenumber" name="301" href="#301">301</a>             manage( copiedPageBTree );
+<a class="jxr_linenumber" name="302" href="#302">302</a>             manage( revisionBTree );
+<a class="jxr_linenumber" name="303" href="#303">303</a>         }
+<a class="jxr_linenumber" name="304" href="#304">304</a>         <strong class="jxr_keyword">catch</strong> ( BTreeAlreadyManagedException btame )
+<a class="jxr_linenumber" name="305" href="#305">305</a>         {
+<a class="jxr_linenumber" name="306" href="#306">306</a>             <em class="jxr_comment">// Can't happen here.</em>
+<a class="jxr_linenumber" name="307" href="#307">307</a>         }
+<a class="jxr_linenumber" name="308" href="#308">308</a> 
+<a class="jxr_linenumber" name="309" href="#309">309</a>         <em class="jxr_comment">// We are all set !</em>
+<a class="jxr_linenumber" name="310" href="#310">310</a>     }
+<a class="jxr_linenumber" name="311" href="#311">311</a> 
+<a class="jxr_linenumber" name="312" href="#312">312</a> 
+<a class="jxr_linenumber" name="313" href="#313">313</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="314" href="#314">314</a> <em class="jxr_javadoccomment">     * Load the BTrees from the disk. </em>
+<a class="jxr_linenumber" name="315" href="#315">315</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="316" href="#316">316</a> <em class="jxr_javadoccomment">     * @throws InstantiationException </em>
+<a class="jxr_linenumber" name="317" href="#317">317</a> <em class="jxr_javadoccomment">     * @throws IllegalAccessException </em>
+<a class="jxr_linenumber" name="318" href="#318">318</a> <em class="jxr_javadoccomment">     * @throws ClassNotFoundException </em>
+<a class="jxr_linenumber" name="319" href="#319">319</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="320" href="#320">320</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> loadRecordManager() <strong class="jxr_keyword">throws</strong> IOException, ClassNotFoundException, IllegalAccessException,
+<a class="jxr_linenumber" name="321" href="#321">321</a>         InstantiationException
+<a class="jxr_linenumber" name="322" href="#322">322</a>     {
+<a class="jxr_linenumber" name="323" href="#323">323</a>         <strong class="jxr_keyword">if</strong> ( fileChannel.size() != 0 )
+<a class="jxr_linenumber" name="324" href="#324">324</a>         {
+<a class="jxr_linenumber" name="325" href="#325">325</a>             ByteBuffer header = ByteBuffer.allocate( HEADER_SIZE );
+<a class="jxr_linenumber" name="326" href="#326">326</a> 
+<a class="jxr_linenumber" name="327" href="#327">327</a>             <em class="jxr_comment">// The file exists, we have to load the data now </em>
+<a class="jxr_linenumber" name="328" href="#328">328</a>             fileChannel.read( header );
+<a class="jxr_linenumber" name="329" href="#329">329</a> 
+<a class="jxr_linenumber" name="330" href="#330">330</a>             header.rewind();
+<a class="jxr_linenumber" name="331" href="#331">331</a> 
+<a class="jxr_linenumber" name="332" href="#332">332</a>             <em class="jxr_comment">// The page size</em>
+<a class="jxr_linenumber" name="333" href="#333">333</a>             pageSize = header.getInt();
+<a class="jxr_linenumber" name="334" href="#334">334</a> 
+<a class="jxr_linenumber" name="335" href="#335">335</a>             <em class="jxr_comment">// The number of managed BTrees</em>
+<a class="jxr_linenumber" name="336" href="#336">336</a>             nbBtree = header.getInt();
+<a class="jxr_linenumber" name="337" href="#337">337</a> 
+<a class="jxr_linenumber" name="338" href="#338">338</a>             <em class="jxr_comment">// The first and last free page</em>
+<a class="jxr_linenumber" name="339" href="#339">339</a>             firstFreePage = header.getLong();
+<a class="jxr_linenumber" name="340" href="#340">340</a>             lastFreePage = header.getLong();
+<a class="jxr_linenumber" name="341" href="#341">341</a> 
+<a class="jxr_linenumber" name="342" href="#342">342</a>             <em class="jxr_comment">// Now read each BTree. The first one is the one which</em>
+<a class="jxr_linenumber" name="343" href="#343">343</a>             <em class="jxr_comment">// manage the modified pages. Once read, we can discard all</em>
+<a class="jxr_linenumber" name="344" href="#344">344</a>             <em class="jxr_comment">// the pages that are stored in it, as we have restarted </em>
+<a class="jxr_linenumber" name="345" href="#345">345</a>             <em class="jxr_comment">// the RecordManager.</em>
+<a class="jxr_linenumber" name="346" href="#346">346</a>             <strong class="jxr_keyword">long</strong> btreeOffset = HEADER_SIZE;
+<a class="jxr_linenumber" name="347" href="#347">347</a> 
+<a class="jxr_linenumber" name="348" href="#348">348</a>             <a href="../../../../../org/apache/directory/mavibot/btree/PageIO.html">PageIO</a>[] pageIos = readPageIOs( HEADER_SIZE, Long.MAX_VALUE );
+<a class="jxr_linenumber" name="349" href="#349">349</a> 
+<a class="jxr_linenumber" name="350" href="#350">350</a>             <em class="jxr_comment">// Create the BTree</em>
+<a class="jxr_linenumber" name="351" href="#351">351</a>             copiedPageBTree = BTreeFactory.createBTree();
+<a class="jxr_linenumber" name="352" href="#352">352</a>             copiedPageBTree.setBtreeOffset( btreeOffset );
+<a class="jxr_linenumber" name="353" href="#353">353</a> 
+<a class="jxr_linenumber" name="354" href="#354">354</a>             loadBTree( pageIos, copiedPageBTree );
+<a class="jxr_linenumber" name="355" href="#355">355</a>             <strong class="jxr_keyword">long</strong> nextBtreeOffset = copiedPageBTree.getNextBTreeOffset();
+<a class="jxr_linenumber" name="356" href="#356">356</a> 
+<a class="jxr_linenumber" name="357" href="#357">357</a>             <em class="jxr_comment">// And the Revision BTree</em>
+<a class="jxr_linenumber" name="358" href="#358">358</a>             pageIos = readPageIOs( nextBtreeOffset, Long.MAX_VALUE );
+<a class="jxr_linenumber" name="359" href="#359">359</a> 
+<a class="jxr_linenumber" name="360" href="#360">360</a>             revisionBTree = BTreeFactory.createBTree();
+<a class="jxr_linenumber" name="361" href="#361">361</a>             revisionBTree.setBtreeOffset( nextBtreeOffset );
+<a class="jxr_linenumber" name="362" href="#362">362</a> 
+<a class="jxr_linenumber" name="363" href="#363">363</a>             loadBTree( pageIos, revisionBTree );
+<a class="jxr_linenumber" name="364" href="#364">364</a>             nextBtreeOffset = revisionBTree.getNextBTreeOffset();
+<a class="jxr_linenumber" name="365" href="#365">365</a> 
+<a class="jxr_linenumber" name="366" href="#366">366</a>             <em class="jxr_comment">// Then process the next ones</em>
+<a class="jxr_linenumber" name="367" href="#367">367</a>             <strong class="jxr_keyword">for</strong> ( <strong class="jxr_keyword">int</strong> i = 2; i &lt; nbBtree; i++ )
+<a class="jxr_linenumber" name="368" href="#368">368</a>             {
+<a class="jxr_linenumber" name="369" href="#369">369</a>                 <em class="jxr_comment">// Create the BTree</em>
+<a class="jxr_linenumber" name="370" href="#370">370</a>                 BTree&lt;?, ?&gt; btree = BTreeFactory.createBTree();
+<a class="jxr_linenumber" name="371" href="#371">371</a>                 btree.setBtreeOffset( nextBtreeOffset );
+<a class="jxr_linenumber" name="372" href="#372">372</a>                 lastAddedBTreeOffset = nextBtreeOffset;
+<a class="jxr_linenumber" name="373" href="#373">373</a> 
+<a class="jxr_linenumber" name="374" href="#374">374</a>                 <em class="jxr_comment">// Read the associated pages</em>
+<a class="jxr_linenumber" name="375" href="#375">375</a>                 pageIos = readPageIOs( nextBtreeOffset, Long.MAX_VALUE );
+<a class="jxr_linenumber" name="376" href="#376">376</a> 
+<a class="jxr_linenumber" name="377" href="#377">377</a>                 <em class="jxr_comment">// Load the BTree</em>
+<a class="jxr_linenumber" name="378" href="#378">378</a>                 loadBTree( pageIos, btree );
+<a class="jxr_linenumber" name="379" href="#379">379</a>                 nextBtreeOffset = btree.getNextBTreeOffset();
+<a class="jxr_linenumber" name="380" href="#380">380</a> 
+<a class="jxr_linenumber" name="381" href="#381">381</a>                 <em class="jxr_comment">// Store it into the managedBtrees map</em>
+<a class="jxr_linenumber" name="382" href="#382">382</a>                 managedBTrees.put( btree.getName(), btree );
+<a class="jxr_linenumber" name="383" href="#383">383</a>             }
+<a class="jxr_linenumber" name="384" href="#384">384</a> 
+<a class="jxr_linenumber" name="385" href="#385">385</a>             <em class="jxr_comment">// We are done ! Let's finish with the last initilization parts</em>
+<a class="jxr_linenumber" name="386" href="#386">386</a>             endOfFileOffset = fileChannel.size();
+<a class="jxr_linenumber" name="387" href="#387">387</a>         }
+<a class="jxr_linenumber" name="388" href="#388">388</a>     }
+<a class="jxr_linenumber" name="389" href="#389">389</a> 
+<a class="jxr_linenumber" name="390" href="#390">390</a> 
+<a class="jxr_linenumber" name="391" href="#391">391</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="392" href="#392">392</a> <em class="jxr_javadoccomment">     * Reads all the PageIOs that are linked to the page at the given position, including</em>
+<a class="jxr_linenumber" name="393" href="#393">393</a> <em class="jxr_javadoccomment">     * the first page.</em>
+<a class="jxr_linenumber" name="394" href="#394">394</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="395" href="#395">395</a> <em class="jxr_javadoccomment">     * @param position The position of the first page</em>
+<a class="jxr_linenumber" name="396" href="#396">396</a> <em class="jxr_javadoccomment">     * @return An array of pages</em>
+<a class="jxr_linenumber" name="397" href="#397">397</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="398" href="#398">398</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/directory/mavibot/btree/PageIO.html">PageIO</a>[] readPageIOs( <strong class="jxr_keyword">long</strong> position, <strong class="jxr_keyword">long</strong> limit ) <strong class="jxr_keyword">throws</strong> IOException, EndOfFileExceededException
+<a class="jxr_linenumber" name="399" href="#399">399</a>     {
+<a class="jxr_linenumber" name="400" href="#400">400</a>         LOG.debug( <span class="jxr_string">"Read PageIOs at position {}"</span>, position );
+<a class="jxr_linenumber" name="401" href="#401">401</a> 
+<a class="jxr_linenumber" name="402" href="#402">402</a>         <strong class="jxr_keyword">if</strong> ( limit &lt;= 0 )
+<a class="jxr_linenumber" name="403" href="#403">403</a>         {
+<a class="jxr_linenumber" name="404" href="#404">404</a>             limit = Long.MAX_VALUE;
+<a class="jxr_linenumber" name="405" href="#405">405</a>         }
+<a class="jxr_linenumber" name="406" href="#406">406</a> 
+<a class="jxr_linenumber" name="407" href="#407">407</a>         <a href="../../../../../org/apache/directory/mavibot/btree/PageIO.html">PageIO</a> firstPage = fetchPage( position );
+<a class="jxr_linenumber" name="408" href="#408">408</a>         firstPage.setSize();
+<a class="jxr_linenumber" name="409" href="#409">409</a>         List&lt;PageIO&gt; listPages = <strong class="jxr_keyword">new</strong> ArrayList&lt;PageIO&gt;();
+<a class="jxr_linenumber" name="410" href="#410">410</a>         listPages.add( firstPage );
+<a class="jxr_linenumber" name="411" href="#411">411</a>         <strong class="jxr_keyword">long</strong> dataRead = pageSize - LONG_SIZE - INT_SIZE;
+<a class="jxr_linenumber" name="412" href="#412">412</a> 
+<a class="jxr_linenumber" name="413" href="#413">413</a>         <em class="jxr_comment">// Iterate on the pages, if needed</em>
+<a class="jxr_linenumber" name="414" href="#414">414</a>         <strong class="jxr_keyword">long</strong> nextPage = firstPage.getNextPage();
+<a class="jxr_linenumber" name="415" href="#415">415</a> 
+<a class="jxr_linenumber" name="416" href="#416">416</a>         <strong class="jxr_keyword">if</strong> ( ( dataRead &lt; limit ) &amp;&amp; ( nextPage != NO_PAGE ) )
+<a class="jxr_linenumber" name="417" href="#417">417</a>         {
+<a class="jxr_linenumber" name="418" href="#418">418</a>             <strong class="jxr_keyword">while</strong> ( dataRead &lt; limit )
+<a class="jxr_linenumber" name="419" href="#419">419</a>             {
+<a class="jxr_linenumber" name="420" href="#420">420</a>                 <a href="../../../../../org/apache/directory/mavibot/btree/PageIO.html">PageIO</a> page = fetchPage( nextPage );
+<a class="jxr_linenumber" name="421" href="#421">421</a>                 listPages.add( page );
+<a class="jxr_linenumber" name="422" href="#422">422</a>                 nextPage = page.getNextPage();
+<a class="jxr_linenumber" name="423" href="#423">423</a>                 dataRead += pageSize - LONG_SIZE;
+<a class="jxr_linenumber" name="424" href="#424">424</a> 
+<a class="jxr_linenumber" name="425" href="#425">425</a>                 <strong class="jxr_keyword">if</strong> ( nextPage == NO_PAGE )
+<a class="jxr_linenumber" name="426" href="#426">426</a>                 {
+<a class="jxr_linenumber" name="427" href="#427">427</a>                     page.setNextPage( NO_PAGE );
+<a class="jxr_linenumber" name="428" href="#428">428</a>                     <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="429" href="#429">429</a>                 }
+<a class="jxr_linenumber" name="430" href="#430">430</a>             }
+<a class="jxr_linenumber" name="431" href="#431">431</a>         }
+<a class="jxr_linenumber" name="432" href="#432">432</a> 
+<a class="jxr_linenumber" name="433" href="#433">433</a>         LOG.debug( <span class="jxr_string">"Nb of PageIOs read : {}"</span>, listPages.size() );
+<a class="jxr_linenumber" name="434" href="#434">434</a> 
+<a class="jxr_linenumber" name="435" href="#435">435</a>         <em class="jxr_comment">// Return </em>
+<a class="jxr_linenumber" name="436" href="#436">436</a>         <strong class="jxr_keyword">return</strong> listPages.toArray( <strong class="jxr_keyword">new</strong> PageIO[]
+<a class="jxr_linenumber" name="437" href="#437">437</a>             {} );
+<a class="jxr_linenumber" name="438" href="#438">438</a>     }
+<a class="jxr_linenumber" name="439" href="#439">439</a> 
+<a class="jxr_linenumber" name="440" href="#440">440</a> 
+<a class="jxr_linenumber" name="441" href="#441">441</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="442" href="#442">442</a> <em class="jxr_javadoccomment">     * Read a BTree from the disk. The meta-data are at the given position in the list of pages.</em>
+<a class="jxr_linenumber" name="443" href="#443">443</a> <em class="jxr_javadoccomment">     * </em>
+<a class="jxr_linenumber" name="444" href="#444">444</a> <em class="jxr_javadoccomment">     * @param pageIos The list of pages containing the meta-data</em>
+<a class="jxr_linenumber" name="445" href="#445">445</a> <em class="jxr_javadoccomment">     * @param btree The BTree we have to initialize</em>
+<a class="jxr_linenumber" name="446" href="#446">446</a> <em class="jxr_javadoccomment">     * @throws InstantiationException </em>
+<a class="jxr_linenumber" name="447" href="#447">447</a> <em class="jxr_javadoccomment">     * @throws IllegalAccessException </em>
+<a class="jxr_linenumber" name="448" href="#448">448</a> <em class="jxr_javadoccomment">     * @throws ClassNotFoundException </em>
+<a class="jxr_linenumber" name="449" href="#449">449</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="450" href="#450">450</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> loadBTree( PageIO[] pageIos, BTree&lt;?, ?&gt; btree ) <strong class="jxr_keyword">throws</strong> EndOfFileExceededException,
+<a class="jxr_linenumber" name="451" href="#451">451</a>         IOException, ClassNotFoundException, IllegalAccessException, InstantiationException
+<a class="jxr_linenumber" name="452" href="#452">452</a>     {
+<a class="jxr_linenumber" name="453" href="#453">453</a>         <strong class="jxr_keyword">long</strong> dataPos = 0L;
+<a class="jxr_linenumber" name="454" href="#454">454</a> 
+<a class="jxr_linenumber" name="455" href="#455">455</a>         <em class="jxr_comment">// The BTree current revision</em>
+<a class="jxr_linenumber" name="456" href="#456">456</a>         <strong class="jxr_keyword">long</strong> revision = readLong( pageIos, dataPos );
+<a class="jxr_linenumber" name="457" href="#457">457</a>         BTreeFactory.setRevision( btree, revision );
+<a class="jxr_linenumber" name="458" href="#458">458</a>         dataPos += LONG_SIZE;
+<a class="jxr_linenumber" name="459" href="#459">459</a> 
+<a class="jxr_linenumber" name="460" href="#460">460</a>         <em class="jxr_comment">// The nb elems in the tree</em>
+<a class="jxr_linenumber" name="461" href="#461">461</a>         <strong class="jxr_keyword">long</strong> nbElems = readLong( pageIos, dataPos );
+<a class="jxr_linenumber" name="462" href="#462">462</a>         BTreeFactory.setNbElems( btree, nbElems );
+<a class="jxr_linenumber" name="463" href="#463">463</a>         dataPos += LONG_SIZE;
+<a class="jxr_linenumber" name="464" href="#464">464</a> 
+<a class="jxr_linenumber" name="465" href="#465">465</a>         <em class="jxr_comment">// The BTree rootPage offset</em>
+<a class="jxr_linenumber" name="466" href="#466">466</a>         <strong class="jxr_keyword">long</strong> rootPageOffset = readLong( pageIos, dataPos );
+<a class="jxr_linenumber" name="467" href="#467">467</a>         BTreeFactory.setRootPageOffset( btree, rootPageOffset );
+<a class="jxr_linenumber" name="468" href="#468">468</a>         dataPos += LONG_SIZE;
+<a class="jxr_linenumber" name="469" href="#469">469</a> 
+<a class="jxr_linenumber" name="470" href="#470">470</a>         <em class="jxr_comment">// The next BTree offset</em>
+<a class="jxr_linenumber" name="471" href="#471">471</a>         <strong class="jxr_keyword">long</strong> nextBTreeOffset = readLong( pageIos, dataPos );
+<a class="jxr_linenumber" name="472" href="#472">472</a>         BTreeFactory.setNextBTreeOffset( btree, nextBTreeOffset );
+<a class="jxr_linenumber" name="473" href="#473">473</a>         dataPos += LONG_SIZE;
+<a class="jxr_linenumber" name="474" href="#474">474</a> 
+<a class="jxr_linenumber" name="475" href="#475">475</a>         <em class="jxr_comment">// The BTree page size</em>
+<a class="jxr_linenumber" name="476" href="#476">476</a>         <strong class="jxr_keyword">int</strong> btreePageSize = readInt( pageIos, dataPos );
+<a class="jxr_linenumber" name="477" href="#477">477</a>         BTreeFactory.setPageSize( btree, btreePageSize );
+<a class="jxr_linenumber" name="478" href="#478">478</a>         dataPos += INT_SIZE;
+<a class="jxr_linenumber" name="479" href="#479">479</a> 
+<a class="jxr_linenumber" name="480" href="#480">480</a>         <em class="jxr_comment">// The tree name</em>
+<a class="jxr_linenumber" name="481" href="#481">481</a>         byte[] btreeNameBytes = readBytes( pageIos, dataPos );
+<a class="jxr_linenumber" name="482" href="#482">482</a>         dataPos += INT_SIZE + btreeNameBytes.length;
+<a class="jxr_linenumber" name="483" href="#483">483</a>         String btreeName = Strings.utf8ToString( btreeNameBytes );
+<a class="jxr_linenumber" name="484" href="#484">484</a>         BTreeFactory.setName( btree, btreeName );
+<a class="jxr_linenumber" name="485" href="#485">485</a> 
+<a class="jxr_linenumber" name="486" href="#486">486</a>         <em class="jxr_comment">// The keySerializer FQCN</em>
+<a class="jxr_linenumber" name="487" href="#487">487</a>         byte[] keySerializerBytes = readBytes( pageIos, dataPos );
+<a class="jxr_linenumber" name="488" href="#488">488</a>         dataPos += INT_SIZE + keySerializerBytes.length;
+<a class="jxr_linenumber" name="489" href="#489">489</a> 
+<a class="jxr_linenumber" name="490" href="#490">490</a>         String keySerializerFqcn = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="491" href="#491">491</a> 
+<a class="jxr_linenumber" name="492" href="#492">492</a>         <strong class="jxr_keyword">if</strong> ( keySerializerBytes != <strong class="jxr_keyword">null</strong> )
+<a class="jxr_linenumber" name="493" href="#493">493</a>         {
+<a class="jxr_linenumber" name="494" href="#494">494</a>             keySerializerFqcn = Strings.utf8ToString( keySerializerBytes );
+<a class="jxr_linenumber" name="495" href="#495">495</a>         }
+<a class="jxr_linenumber" name="496" href="#496">496</a>         <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="497" href="#497">497</a>         {
+<a class="jxr_linenumber" name="498" href="#498">498</a>             keySerializerFqcn = <span class="jxr_string">""</span>;
+<a class="jxr_linenumber" name="499" href="#499">499</a>         }
+<a class="jxr_linenumber" name="500" href="#500">500</a> 
+<a class="jxr_linenumber" name="501" href="#501">501</a>         BTreeFactory.setKeySerializer( btree, keySerializerFqcn );
+<a class="jxr_linenumber" name="502" href="#502">502</a> 
+<a class="jxr_linenumber" name="503" href="#503">503</a>         <em class="jxr_comment">// The valueSerialier FQCN</em>
+<a class="jxr_linenumber" name="504" href="#504">504</a>         byte[] valueSerializerBytes = readBytes( pageIos, dataPos );
+<a class="jxr_linenumber" name="505" href="#505">505</a> 
+<a class="jxr_linenumber" name="506" href="#506">506</a>         String valueSerializerFqcn = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="507" href="#507">507</a>         dataPos += INT_SIZE + valueSerializerBytes.length;
+<a class="jxr_linenumber" name="508" href="#508">508</a> 
+<a class="jxr_linenumber" name="509" href="#509">509</a>         <strong class="jxr_keyword">if</strong> ( valueSerializerBytes != <strong class="jxr_keyword">null</strong> )
+<a class="jxr_linenumber" name="510" href="#510">510</a>         {
+<a class="jxr_linenumber" name="511" href="#511">511</a>             valueSerializerFqcn = Strings.utf8ToString( valueSerializerBytes );
+<a class="jxr_linenumber" name="512" href="#512">512</a>         }
+<a class="jxr_linenumber" name="513" href="#513">513</a>         <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="514" href="#514">514</a>         {
+<a class="jxr_linenumber" name="515" href="#515">515</a>             valueSerializerFqcn = <span class="jxr_string">""</span>;
+<a class="jxr_linenumber" name="516" href="#516">516</a>         }
+<a class="jxr_linenumber" name="517" href="#517">517</a> 
+<a class="jxr_linenumber" name="518" href="#518">518</a>         BTreeFactory.setValueSerializer( btree, valueSerializerFqcn );
+<a class="jxr_linenumber" name="519" href="#519">519</a> 
+<a class="jxr_linenumber" name="520" href="#520">520</a>         <em class="jxr_comment">// The BTree allowDuplicates flag</em>
+<a class="jxr_linenumber" name="521" href="#521">521</a>         <strong class="jxr_keyword">int</strong> allowDuplicates = readInt( pageIos, dataPos );
+<a class="jxr_linenumber" name="522" href="#522">522</a>         btree.setAllowDuplicates( allowDuplicates != 0 );
+<a class="jxr_linenumber" name="523" href="#523">523</a>         dataPos += INT_SIZE;
+<a class="jxr_linenumber" name="524" href="#524">524</a> 
+<a class="jxr_linenumber" name="525" href="#525">525</a>         <em class="jxr_comment">// Now, init the BTree</em>
+<a class="jxr_linenumber" name="526" href="#526">526</a>         btree.init();
+<a class="jxr_linenumber" name="527" href="#527">527</a> 
+<a class="jxr_linenumber" name="528" href="#528">528</a>         <em class="jxr_comment">// Now, load the rootPage, which can be a Leaf or a Node, depending </em>
+<a class="jxr_linenumber" name="529" href="#529">529</a>         <em class="jxr_comment">// on the number of elements in the tree : if it's above the pageSize,</em>
+<a class="jxr_linenumber" name="530" href="#530">530</a>         <em class="jxr_comment">// it's a Node, otherwise it's a Leaf</em>
+<a class="jxr_linenumber" name="531" href="#531">531</a> 
+<a class="jxr_linenumber" name="532" href="#532">532</a>         <em class="jxr_comment">// Read the rootPage pages on disk</em>
+<a class="jxr_linenumber" name="533" href="#533">533</a>         <a href="../../../../../org/apache/directory/mavibot/btree/PageIO.html">PageIO</a>[] rootPageIos = readPageIOs( rootPageOffset, Long.MAX_VALUE );
+<a class="jxr_linenumber" name="534" href="#534">534</a> 
+<a class="jxr_linenumber" name="535" href="#535">535</a>         <a href="../../../../../org/apache/directory/mavibot/btree/Page.html">Page</a> btreeRoot = readPage( btree, rootPageIos );
+<a class="jxr_linenumber" name="536" href="#536">536</a>         BTreeFactory.setRecordManager( btree, <strong class="jxr_keyword">this</strong> );
+<a class="jxr_linenumber" name="537" href="#537">537</a> 
+<a class="jxr_linenumber" name="538" href="#538">538</a>         BTreeFactory.setRoot( btree, btreeRoot );
+<a class="jxr_linenumber" name="539" href="#539">539</a>     }
+<a class="jxr_linenumber" name="540" href="#540">540</a> 
+<a class="jxr_linenumber" name="541" href="#541">541</a> 
+<a class="jxr_linenumber" name="542" href="#542">542</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/directory/mavibot/btree/Page.html">Page</a> readNode( BTree btree, <strong class="jxr_keyword">long</strong> offset, <strong class="jxr_keyword">long</strong> revision, <strong class="jxr_keyword">int</strong> nbElems ) <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="543" href="#543">543</a>     {
+<a class="jxr_linenumber" name="544" href="#544">544</a>         <a href="../../../../../org/apache/directory/mavibot/btree/Page.html">Page</a> node = BTreeFactory.createNode( btree, revision, nbElems );
+<a class="jxr_linenumber" name="545" href="#545">545</a> 
+<a class="jxr_linenumber" name="546" href="#546">546</a>         <em class="jxr_comment">// Read the rootPage pages on disk</em>
+<a class="jxr_linenumber" name="547" href="#547">547</a>         <a href="../../../../../org/apache/directory/mavibot/btree/PageIO.html">PageIO</a>[] pageIos = readPageIOs( offset, Long.MAX_VALUE );
+<a class="jxr_linenumber" name="548" href="#548">548</a> 
+<a class="jxr_linenumber" name="549" href="#549">549</a>         <strong class="jxr_keyword">return</strong> node;
+<a class="jxr_linenumber" name="550" href="#550">550</a>     }
+<a class="jxr_linenumber" name="551" href="#551">551</a> 
+<a class="jxr_linenumber" name="552" href="#552">552</a> 
+<a class="jxr_linenumber" name="553" href="#553">553</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/directory/mavibot/btree/Page.html">Page</a> deserialize( BTree btree, <strong class="jxr_keyword">long</strong> offset ) <strong class="jxr_keyword">throws</strong> EndOfFileExceededException, IOException
+<a class="jxr_linenumber" name="554" href="#554">554</a>     {
+<a class="jxr_linenumber" name="555" href="#555">555</a>         <a href="../../../../../org/apache/directory/mavibot/btree/PageIO.html">PageIO</a>[] rootPageIos = readPageIOs( offset, Long.MAX_VALUE );
+<a class="jxr_linenumber" name="556" href="#556">556</a> 
+<a class="jxr_linenumber" name="557" href="#557">557</a>         <a href="../../../../../org/apache/directory/mavibot/btree/Page.html">Page</a> page = readPage( btree, rootPageIos );
+<a class="jxr_linenumber" name="558" href="#558">558</a> 
+<a class="jxr_linenumber" name="559" href="#559">559</a>         <strong class="jxr_keyword">return</strong> page;
+<a class="jxr_linenumber" name="560" href="#560">560</a>     }
+<a class="jxr_linenumber" name="561" href="#561">561</a> 
+<a class="jxr_linenumber" name="562" href="#562">562</a> 
+<a class="jxr_linenumber" name="563" href="#563">563</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/directory/mavibot/btree/Page.html">Page</a> readPage( BTree btree, PageIO[] pageIos ) <strong class="jxr_keyword">throws</strong> IOException
+<a class="jxr_linenumber" name="564" href="#564">564</a>     {
+<a class="jxr_linenumber" name="565" href="#565">565</a>         <em class="jxr_comment">// Deserialize the rootPage now</em>
+<a class="jxr_linenumber" name="566" href="#566">566</a>         <strong class="jxr_keyword">long</strong> position = 0L;
+<a class="jxr_linenumber" name="567" href="#567">567</a> 
+<a class="jxr_linenumber" name="568" href="#568">568</a>         <em class="jxr_comment">// The revision</em>
+<a class="jxr_linenumber" name="569" href="#569">569</a>         <strong class="jxr_keyword">long</strong> revision = readLong( pageIos, position );
+<a class="jxr_linenumber" name="570" href="#570">570</a>         position += LONG_SIZE;
+<a class="jxr_linenumber" name="571" href="#571">571</a> 
+<a class="jxr_linenumber" name="572" href="#572">572</a>         <em class="jxr_comment">// The number of elements in the page</em>
+<a class="jxr_linenumber" name="573" href="#573">573</a>         <strong class="jxr_keyword">int</strong> nbElems = readInt( pageIos, position );
+<a class="jxr_linenumber" name="574" href="#574">574</a>         position += INT_SIZE;
+<a class="jxr_linenumber" name="575" href="#575">575</a> 
+<a class="jxr_linenumber" name="576" href="#576">576</a>         <em class="jxr_comment">// The size of the data containing the keys and values</em>
+<a class="jxr_linenumber" name="577" href="#577">577</a>         <a href="../../../../../org/apache/directory/mavibot/btree/Page.html">Page</a> page = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="578" href="#578">578</a>         ByteBuffer byteBuffer = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="579" href="#579">579</a> 
+<a class="jxr_linenumber" name="580" href="#580">580</a>         <em class="jxr_comment">// Reads the bytes containing all the keys and values, if we have some</em>
+<a class="jxr_linenumber" name="581" href="#581">581</a>         byte[] data = readBytes( pageIos, position );
+<a class="jxr_linenumber" name="582" href="#582">582</a> 
+<a class="jxr_linenumber" name="583" href="#583">583</a>         <strong class="jxr_keyword">if</strong> ( data != <strong class="jxr_keyword">null</strong> )
+<a class="jxr_linenumber" name="584" href="#584">584</a>         {
+<a class="jxr_linenumber" name="585" href="#585">585</a>             byteBuffer = ByteBuffer.allocate( data.length );
+<a class="jxr_linenumber" name="586" href="#586">586</a>             byteBuffer.put( data );
+<a class="jxr_linenumber" name="587" href="#587">587</a>             byteBuffer.rewind();
+<a class="jxr_linenumber" name="588" href="#588">588</a>         }
+<a class="jxr_linenumber" name="589" href="#589">589</a> 
+<a class="jxr_linenumber" name="590" href="#590">590</a>         <strong class="jxr_keyword">if</strong> ( nbElems &gt;= 0 )
+<a class="jxr_linenumber" name="591" href="#591">591</a>         {
+<a class="jxr_linenumber" name="592" href="#592">592</a>             <em class="jxr_comment">// Its a leaf</em>
+<a class="jxr_linenumber" name="593" href="#593">593</a>             page = BTreeFactory.createLeaf( btree, revision, nbElems );
+<a class="jxr_linenumber" name="594" href="#594">594</a> 
+<a class="jxr_linenumber" name="595" href="#595">595</a>             ( ( <a href="../../../../../org/apache/directory/mavibot/btree/AbstractPage.html">AbstractPage</a> ) page ).setOffset( pageIos[0].getOffset() );
+<a class="jxr_linenumber" name="596" href="#596">596</a>             ( ( <a href="../../../../../org/apache/directory/mavibot/btree/AbstractPage.html">AbstractPage</a> ) page ).setLastOffset( pageIos[pageIos.length - 1].getOffset() );
+<a class="jxr_linenumber" name="597" href="#597">597</a> 
+<a class="jxr_linenumber" name="598" href="#598">598</a>             <em class="jxr_comment">// Read each value and key</em>
+<a class="jxr_linenumber" name="599" href="#599">599</a>             <strong class="jxr_keyword">for</strong> ( <strong class="jxr_keyword">int</strong> i = 0; i &lt; nbElems; i++ )
+<a class="jxr_linenumber" name="600" href="#600">600</a>             {
+<a class="jxr_linenumber" name="601" href="#601">601</a>                 <a href="../../../../../org/apache/directory/mavibot/btree/ElementHolder.html">ElementHolder</a> valueHolder;
+<a class="jxr_linenumber" name="602" href="#602">602</a> 
+<a class="jxr_linenumber" name="603" href="#603">603</a>                 <strong class="jxr_keyword">if</strong> ( btree.isAllowDuplicates() )
+<a class="jxr_linenumber" name="604" href="#604">604</a>                 {
+<a class="jxr_linenumber" name="605" href="#605">605</a>                     <strong class="jxr_keyword">long</strong> value = OFFSET_SERIALIZER.deserialize( byteBuffer );
+<a class="jxr_linenumber" name="606" href="#606">606</a>                     
+<a class="jxr_linenumber" name="607" href="#607">607</a>                     <a href="../../../../../org/apache/directory/mavibot/btree/BTree.html">BTree</a> dupValueContainer = loadDupsBTree(value);
+<a class="jxr_linenumber" name="608" href="#608">608</a> 
+<a class="jxr_linenumber" name="609" href="#609">609</a>                     valueHolder = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/DuplicateKeyMemoryHolder.html">DuplicateKeyMemoryHolder</a>( btree, dupValueContainer );
+<a class="jxr_linenumber" name="610" href="#610">610</a>                 }
+<a class="jxr_linenumber" name="611" href="#611">611</a>                 <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="612" href="#612">612</a>                 {
+<a class="jxr_linenumber" name="613" href="#613">613</a>                     Object value = btree.getValueSerializer().deserialize( byteBuffer );
+<a class="jxr_linenumber" name="614" href="#614">614</a> 
+<a class="jxr_linenumber" name="615" href="#615">615</a>                     valueHolder = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/MemoryHolder.html">MemoryHolder</a>( btree, value );
+<a class="jxr_linenumber" name="616" href="#616">616</a>                 }
+<a class="jxr_linenumber" name="617" href="#617">617</a> 
+<a class="jxr_linenumber" name="618" href="#618">618</a>                 BTreeFactory.setValue( ( ( Leaf ) page ), i, valueHolder );
+<a class="jxr_linenumber" name="619" href="#619">619</a> 
+<a class="jxr_linenumber" name="620" href="#620">620</a>                 Object key = btree.getKeySerializer().deserialize( byteBuffer );
+<a class="jxr_linenumber" name="621" href="#621">621</a> 
+<a class="jxr_linenumber" name="622" href="#622">622</a>                 BTreeFactory.setKey( page, i, key );
+<a class="jxr_linenumber" name="623" href="#623">623</a>             }
+<a class="jxr_linenumber" name="624" href="#624">624</a>         }
+<a class="jxr_linenumber" name="625" href="#625">625</a>         <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="626" href="#626">626</a>         {
+<a class="jxr_linenumber" name="627" href="#627">627</a>             <em class="jxr_comment">// It's a node</em>
+<a class="jxr_linenumber" name="628" href="#628">628</a>             <strong class="jxr_keyword">int</strong> nodeNbElems = -nbElems;
+<a class="jxr_linenumber" name="629" href="#629">629</a> 
+<a class="jxr_linenumber" name="630" href="#630">630</a>             page = BTreeFactory.createNode( btree, revision, nodeNbElems );
+<a class="jxr_linenumber" name="631" href="#631">631</a> 
+<a class="jxr_linenumber" name="632" href="#632">632</a>             <em class="jxr_comment">// Read each value and key</em>
+<a class="jxr_linenumber" name="633" href="#633">633</a>             <strong class="jxr_keyword">for</strong> ( <strong class="jxr_keyword">int</strong> i = 0; i &lt; nodeNbElems; i++ )
+<a class="jxr_linenumber" name="634" href="#634">634</a>             {
+<a class="jxr_linenumber" name="635" href="#635">635</a>                 <em class="jxr_comment">// This is an Offset</em>
+<a class="jxr_linenumber" name="636" href="#636">636</a>                 <strong class="jxr_keyword">long</strong> offset = OFFSET_SERIALIZER.deserialize( byteBuffer );
+<a class="jxr_linenumber" name="637" href="#637">637</a>                 <strong class="jxr_keyword">long</strong> lastOffset = OFFSET_SERIALIZER.deserialize( byteBuffer );
+<a class="jxr_linenumber" name="638" href="#638">638</a> 
+<a class="jxr_linenumber" name="639" href="#639">639</a>                 <a href="../../../../../org/apache/directory/mavibot/btree/ElementHolder.html">ElementHolder</a> valueHolder = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/ReferenceHolder.html">ReferenceHolder</a>( btree, <strong class="jxr_keyword">null</strong>, offset, lastOffset );
+<a class="jxr_linenumber" name="640" href="#640">640</a>                 ( ( <a href="../../../../../org/apache/directory/mavibot/btree/Node.html">Node</a> ) page ).setValue( i, valueHolder );
+<a class="jxr_linenumber" name="641" href="#641">641</a> 
+<a class="jxr_linenumber" name="642" href="#642">642</a>                 Object key = btree.getKeySerializer().deserialize( byteBuffer );
+<a class="jxr_linenumber" name="643" href="#643">643</a>                 BTreeFactory.setKey( page, i, key );
+<a class="jxr_linenumber" name="644" href="#644">644</a>             }
+<a class="jxr_linenumber" name="645" href="#645">645</a> 
+<a class="jxr_linenumber" name="646" href="#646">646</a>             <em class="jxr_comment">// and read the last value, as it's a node</em>
+<a class="jxr_linenumber" name="647" href="#647">647</a>             <strong class="jxr_keyword">long</strong> offset = OFFSET_SERIALIZER.deserialize( byteBuffer );
+<a class="jxr_linenumber" name="648" href="#648">648</a>             <strong class="jxr_keyword">long</strong> lastOffset = OFFSET_SERIALIZER.deserialize( byteBuffer );
+<a class="jxr_linenumber" name="649" href="#649">649</a> 
+<a class="jxr_linenumber" name="650" href="#650">650</a>             <a href="../../../../../org/apache/directory/mavibot/btree/ElementHolder.html">ElementHolder</a> valueHolder = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/directory/mavibot/btree/ReferenceHolder.html">ReferenceHolder</a>( btree, <strong class="jxr_keyword">null</strong>, offset, lastOffset );
+<a class="jxr_linenumber" name="651" href="#651">651</a>             ( ( <a href="../../../../../org/apache/directory/mavibot/btree/Node.html">Node</a> ) page ).setValue( nodeNbElems, valueHolder );
+<a class="jxr_linenumber" name="652" href="#652">652</a>         }
+<a class="jxr_linenumber" name="653" href="#653">653</a> 
+<a class="jxr_linenumber" name="654" href="#654">654</a>         <strong class="jxr_keyword">return</strong> page;
+<a class="jxr_linenumber" name="655" href="#655">655</a>     }
+<a class="jxr_linenumber" name="656" href="#656">656</a> 
+<a class="jxr_linenumber" name="657" href="#657">657</a> 
+<a class="jxr_linenumber" name="658" href="#658">658</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="659" href="#659">659</a> <em class="jxr_javadoccomment">     * Read a byte[] from pages.</em>
+<a class="jxr_linenumber" name="660" href="#660">660</a> <em class="jxr_javadoccomment">     * @param pageIos The pages we want to read the byte[] from</em>
+<a class="jxr_linenumber" name="661" href="#661">661</a> <em class="jxr_javadoccomment">     * @param position The position in the data stored in those pages</em>
+<a class="jxr_linenumber" name="662" href="#662">662</a> <em class="jxr_javadoccomment">     * @return The byte[] we have read</em>
+<a class="jxr_linenumber" name="663" href="#663">663</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="664" href="#664">664</a>     <strong class="jxr_keyword">private</strong> byte[] readBytes( PageIO[] pageIos, <strong class="jxr_keyword">long</strong> position )
+<a class="jxr_linenumber" name="665" href="#665">665</a>     {
+<a class="jxr_linenumber" name="666" href="#666">666</a>         <em class="jxr_comment">// Read the byte[] length first</em>
+<a class="jxr_linenumber" name="667" href="#667">667</a>         <strong class="jxr_keyword">int</strong> length = readInt( pageIos, position );
+<a class="jxr_linenumber" name="668" href="#668">668</a>         position += INT_SIZE;
+<a class="jxr_linenumber" name="669" href="#669">669</a> 
+<a class="jxr_linenumber" name="670" href="#670">670</a>         <em class="jxr_comment">// Compute the page in which we will store the data given the </em>
+<a class="jxr_linenumber" name="671" href="#671">671</a>         <em class="jxr_comment">// current position</em>
+<a class="jxr_linenumber" name="672" href="#672">672</a>         <strong class="jxr_keyword">int</strong> pageNb = computePageNb( position );
+<a class="jxr_linenumber" name="673" href="#673">673</a> 
+<a class="jxr_linenumber" name="674" href="#674">674</a>         <em class="jxr_comment">// Compute the position in the current page</em>
+<a class="jxr_linenumber" name="675" href="#675">675</a>         <strong class="jxr_keyword">int</strong> pagePos = ( <strong class="jxr_keyword">int</strong> ) ( position + ( pageNb + 1 ) * LONG_SIZE + INT_SIZE ) - pageNb * pageSize;
+<a class="jxr_linenumber" name="676" href="#676">676</a> 
+<a class="jxr_linenumber" name="677" href="#677">677</a>         ByteBuffer pageData = pageIos[pageNb].getData();
+<a class="jxr_linenumber" name="678" href="#678">678</a>         <strong class="jxr_keyword">int</strong> remaining = pageData.capacity() - pagePos;
+<a class="jxr_linenumber" name="679" href="#679">679</a> 
+<a class="jxr_linenumber" name="680" href="#680">680</a>         <strong class="jxr_keyword">if</strong> ( length == 0 )
+<a class="jxr_linenumber" name="681" href="#681">681</a>         {
+<a class="jxr_linenumber" name="682" href="#682">682</a>             <em class="jxr_comment">// No bytes to read : return null;</em>
+<a class="jxr_linenumber" name="683" href="#683">683</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="684" href="#684">684</a>         }
+<a class="jxr_linenumber" name="685" href="#685">685</a>         <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="686" href="#686">686</a>         {
+<a class="jxr_linenumber" name="687" href="#687">687</a>             byte[] bytes = <strong class="jxr_keyword">new</strong> byte[length];
+<a class="jxr_linenumber" name="688" href="#688">688</a>             <strong class="jxr_keyword">int</strong> bytesPos = 0;
+<a class="jxr_linenumber" name="689" href="#689">689</a> 
+<a class="jxr_linenumber" name="690" href="#690">690</a>             <strong class="jxr_keyword">while</strong> ( length &gt; 0 )
+<a class="jxr_linenumber" name="691" href="#691">691</a>             {
+<a class="jxr_linenumber" name="692" href="#692">692</a>                 <strong class="jxr_keyword">if</strong> ( length &lt;= remaining )
+<a class="jxr_linenumber" name="693" href="#693">693</a>                 {
+<a class="jxr_linenumber" name="694" href="#694">694</a>                     pageData.mark();
+<a class="jxr_linenumber" name="695" href="#695">695</a>                     pageData.position( pagePos );
+<a class="jxr_linenumber" name="696" href="#696">696</a>                     pageData.get( bytes, bytesPos, length );
+<a class="jxr_linenumber" name="697" href="#697">697</a>                     pageData.reset();
+<a class="jxr_linenumber" name="698" href="#698">698</a> 
+<a class="jxr_linenumber" name="699" href="#699">699</a>                     <strong class="jxr_keyword">return</strong> bytes;
+<a class="jxr_linenumber" name="700" href="#700">700</a>                 }
+<a class="jxr_linenumber" name="701" href="#701">701</a> 
+<a class="jxr_linenumber" name="702" href="#702">702</a>                 pageData.mark();
+<a class="jxr_linenumber" name="703" href="#703">703</a>                 pageData.position( pagePos );
+<a class="jxr_linenumber" name="704" href="#704">704</a>                 pageData.get( bytes, bytesPos, remaining );
+<a class="jxr_linenumber" name="705" href="#705">705</a>                 pageData.reset();
+<a class="jxr_linenumber" name="706" href="#706">706</a>                 pageNb++;
+<a class="jxr_linenumber" name="707" href="#707">707</a>                 pagePos = LINK_SIZE;
+<a class="jxr_linenumber" name="708" href="#708">708</a>                 bytesPos += remaining;
+<a class="jxr_linenumber" name="709" href="#709">709</a>                 pageData = pageIos[pageNb].getData();
+<a class="jxr_linenumber" name="710" href="#710">710</a>                 length -= remaining;
+<a class="jxr_linenumber" name="711" href="#711">711</a>                 remaining = pageData.capacity() - pagePos;
+<a class="jxr_linenumber" name="712" href="#712">712</a>             }
+<a class="jxr_linenumber" name="713" href="#713">713</a> 
+<a class="jxr_linenumber" name="714" href="#714">714</a>             <strong class="jxr_keyword">return</strong> bytes;
+<a class="jxr_linenumber" name="715" href="#715">715</a>         }
+<a class="jxr_linenumber" name="716" href="#716">716</a>     }
+<a class="jxr_linenumber" name="717" href="#717">717</a> 
+<a class="jxr_linenumber" name="718" href="#718">718</a> 
+<a class="jxr_linenumber" name="719" href="#719">719</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="720" href="#720">720</a> <em class="jxr_javadoccomment">     * Read an int from pages </em>
+<a class="jxr_linenumber" name="721" href="#721">721</a> <em class="jxr_javadoccomment">     * @param pageIos The pages we want to read the int from</em>
+<a class="jxr_linenumber" name="722" href="#722">722</a> <em class="jxr_javadoccomment">     * @param position The position in the data stored in those pages</em>
+<a class="jxr_linenumber" name="723" href="#723">723</a> <em class="jxr_javadoccomment">     * @return The int we have read</em>
+<a class="jxr_linenumber" name="724" href="#724">724</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="725" href="#725">725</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> readInt( PageIO[] pageIos, <strong class="jxr_keyword">long</strong> position )
+<a class="jxr_linenumber" name="726" href="#726">726</a>     {
+<a class="jxr_linenumber" name="727" href="#727">727</a>         <em class="jxr_comment">// Compute the page in which we will store the data given the </em>
+<a class="jxr_linenumber" name="728" href="#728">728</a>         <em class="jxr_comment">// current position</em>
+<a class="jxr_linenumber" name="729" href="#729">729</a>         <strong class="jxr_keyword">int</strong> pageNb = computePageNb( position );
+<a class="jxr_linenumber" name="730" href="#730">730</a> 
+<a class="jxr_linenumber" name="731" href="#731">731</a>         <em class="jxr_comment">// Compute the position in the current page</em>
+<a class="jxr_linenumber" name="732" href="#732">732</a>         <strong class="jxr_keyword">int</strong> pagePos = ( <strong class="jxr_keyword">int</strong> ) ( position + ( pageNb + 1 ) * LONG_SIZE + INT_SIZE ) - pageNb * pageSize;
+<a class="jxr_linenumber" name="733" href="#733">733</a> 
+<a class="jxr_linenumber" name="734" href="#734">734</a>         ByteBuffer pageData = pageIos[pageNb].getData();
+<a class="jxr_linenumber" name="735" href="#735">735</a>         <strong class="jxr_keyword">int</strong> remaining = pageData.capacity() - pagePos;
+<a class="jxr_linenumber" name="736" href="#736">736</a>         <strong class="jxr_keyword">int</strong> value = 0;
+<a class="jxr_linenumber" name="737" href="#737">737</a> 
+<a class="jxr_linenumber" name="738" href="#738">738</a>         <strong class="jxr_keyword">if</strong> ( remaining &gt;= INT_SIZE )
+<a class="jxr_linenumber" name="739" href="#739">739</a>         {
+<a class="jxr_linenumber" name="740" href="#740">740</a>             value = pageData.getInt( pagePos );
+<a class="jxr_linenumber" name="741" href="#741">741</a>         }
+<a class="jxr_linenumber" name="742" href="#742">742</a>         <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="743" href="#743">743</a>         {
+<a class="jxr_linenumber" name="744" href="#744">744</a>             value = 0;
+<a class="jxr_linenumber" name="745" href="#745">745</a> 
+<a class="jxr_linenumber" name="746" href="#746">746</a>             <strong class="jxr_keyword">switch</strong> ( remaining )
+<a class="jxr_linenumber" name="747" href="#747">747</a>             {

[... 2044 lines stripped ...]


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