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From cutt...@apache.org
Subject svn commit: r492251 - in /lucene/hadoop/trunk: CHANGES.txt src/java/org/apache/hadoop/io/VIntWritable.java src/java/org/apache/hadoop/io/VLongWritable.java
Date Wed, 03 Jan 2007 18:56:54 GMT
Author: cutting
Date: Wed Jan  3 10:56:54 2007
New Revision: 492251

URL: http://svn.apache.org/viewvc?view=rev&rev=492251
Log:
HADOOP-850.  Add Writable implementations for variable-length integers.  Contributed by Andrzej.

Added:
    lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VIntWritable.java
    lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VLongWritable.java
Modified:
    lucene/hadoop/trunk/CHANGES.txt

Modified: lucene/hadoop/trunk/CHANGES.txt
URL: http://svn.apache.org/viewvc/lucene/hadoop/trunk/CHANGES.txt?view=diff&rev=492251&r1=492250&r2=492251
==============================================================================
--- lucene/hadoop/trunk/CHANGES.txt (original)
+++ lucene/hadoop/trunk/CHANGES.txt Wed Jan  3 10:56:54 2007
@@ -162,6 +162,9 @@
 45. HADOOP-745.  Fix a synchronization bug in the HDFS namenode.
     (Dhruba Borthakur via cutting)
 
+46. HADOOP-850.  Add Writable implementations for variable-length
+    integers.  (ab via cutting)
+
 
 Release 0.9.2 - 2006-12-15
 

Added: lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VIntWritable.java
URL: http://svn.apache.org/viewvc/lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VIntWritable.java?view=auto&rev=492251
==============================================================================
--- lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VIntWritable.java (added)
+++ lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VIntWritable.java Wed Jan  3 10:56:54
2007
@@ -0,0 +1,74 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.io;
+
+import java.io.*;
+
+/** A WritableComparable for integer values stored in variable-length format.
+ * Such values take between one and five bytes.  Smaller values take fewer bytes.
+ * 
+ * @author Andrzej Bialecki
+ * @see org.apache.hadoop.io.WritableUtils#readVInt(DataInput)
+ */
+public class VIntWritable implements WritableComparable {
+  private int value;
+
+  public VIntWritable() {}
+
+  public VIntWritable(int value) { set(value); }
+
+  /** Set the value of this VIntWritable. */
+  public void set(int value) { this.value = value; }
+
+  /** Return the value of this VIntWritable. */
+  public int get() { return value; }
+
+  public void readFields(DataInput in) throws IOException {
+    value = WritableUtils.readVInt(in);
+  }
+
+  public void write(DataOutput out) throws IOException {
+    WritableUtils.writeVInt(out, value);
+  }
+
+  /** Returns true iff <code>o</code> is a VIntWritable with the same value.
*/
+  public boolean equals(Object o) {
+    if (!(o instanceof VIntWritable))
+      return false;
+    VIntWritable other = (VIntWritable)o;
+    return this.value == other.value;
+  }
+
+  public int hashCode() {
+    return (int)value;
+  }
+
+  /** Compares two VIntWritables. */
+  public int compareTo(Object o) {
+    int thisValue = this.value;
+    int thatValue = ((VIntWritable)o).value;
+    return (thisValue < thatValue ? -1 : (thisValue == thatValue ? 0 : 1));
+  }
+
+  public String toString() {
+    return Integer.toString(value);
+  }
+
+}
+

Added: lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VLongWritable.java
URL: http://svn.apache.org/viewvc/lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VLongWritable.java?view=auto&rev=492251
==============================================================================
--- lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VLongWritable.java (added)
+++ lucene/hadoop/trunk/src/java/org/apache/hadoop/io/VLongWritable.java Wed Jan  3 10:56:54
2007
@@ -0,0 +1,74 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.io;
+
+import java.io.*;
+
+/** A WritableComparable for longs in a variable-length format. Such values take
+ *  between one and five bytes.  Smaller values take fewer bytes.
+ *  
+ *  @author Andrzej Bialecki
+ *  @see org.apache.hadoop.io.WritableUtils#readVLong(DataInput)
+ */
+public class VLongWritable implements WritableComparable {
+  private long value;
+
+  public VLongWritable() {}
+
+  public VLongWritable(long value) { set(value); }
+
+  /** Set the value of this LongWritable. */
+  public void set(long value) { this.value = value; }
+
+  /** Return the value of this LongWritable. */
+  public long get() { return value; }
+
+  public void readFields(DataInput in) throws IOException {
+    value = WritableUtils.readVLong(in);
+  }
+
+  public void write(DataOutput out) throws IOException {
+    WritableUtils.writeVLong(out, value);
+  }
+
+  /** Returns true iff <code>o</code> is a VLongWritable with the same value.
*/
+  public boolean equals(Object o) {
+    if (!(o instanceof VLongWritable))
+      return false;
+    VLongWritable other = (VLongWritable)o;
+    return this.value == other.value;
+  }
+
+  public int hashCode() {
+    return (int)value;
+  }
+
+  /** Compares two VLongWritables. */
+  public int compareTo(Object o) {
+    long thisValue = this.value;
+    long thatValue = ((VLongWritable)o).value;
+    return (thisValue < thatValue ? -1 : (thisValue == thatValue ? 0 : 1));
+  }
+
+  public String toString() {
+    return Long.toString(value);
+  }
+
+}
+



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