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From Bernhard Messer <bernhard.mes...@intrafind.de>
Subject Re: Find version of Lucene library
Date Thu, 10 Mar 2005 11:00:19 GMT
+1
   
    Bernhard

Doug Cutting wrote:

> Andrzej Bialecki wrote:
>
>>> Hmmm... would not java.lang.Package various methods do the job?
>>
>>
>>
>> I'm not sure... I just tried to do 
>> Package.getPackage("org.apache.lucene") and got null, even though the 
>> manifest is present in the JAR.
>
>
> I looked into this.  The package name in the manifest is 
> "org/apache/lucene".  But in order for this to work the package name 
> in the manifest must: (a) end with a slash; and (b) name a package 
> with classes in it, and lucene's classes are all in sub-packages--no 
> classes are in "org.apache.lucene".
>
> I've attached a patch that fixes (b) by adding a class in the 
> top-level package.  Comments?
>
> Doug
>
>------------------------------------------------------------------------
>
>Index: build.xml
>===================================================================
>--- build.xml	(revision 156658)
>+++ build.xml	(working copy)
>@@ -189,7 +189,7 @@
>       excludes="**/*.java">
>       <manifest>
>         <attribute name="Created-By" value="Apache Jakarta"/>
>-        <section name="org/apache/lucene">
>+        <section name="org/apache/lucene/">
>           <attribute name="Specification-Title" value="Lucene Search Engine"/>
>           <attribute name="Specification-Version" value="${version}"/>
>           <attribute name="Specification-Vendor" value="Lucene"/>
>Index: src/java/org/apache/lucene/package.html
>===================================================================
>--- src/java/org/apache/lucene/package.html	(revision 0)
>+++ src/java/org/apache/lucene/package.html	(revision 0)
>@@ -0,0 +1 @@
>+<html><body>Top-level package.</body></html>
>Index: src/java/org/apache/lucene/LucenePackage.java
>===================================================================
>--- src/java/org/apache/lucene/LucenePackage.java	(revision 0)
>+++ src/java/org/apache/lucene/LucenePackage.java	(revision 0)
>@@ -0,0 +1,28 @@
>+package org.apache.lucene;
>+
>+/**
>+ * Copyright 2005 The Apache Software Foundation
>+ *
>+ * Licensed 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.
>+ */
>+
>+/** Lucene's package information, including version. **/
>+public final class LucenePackage {
>+
>+  private LucenePackage() {}                      // can't construct
>+
>+  /** Return Lucene's package, including version information. */
>+  public static Package get() {
>+    return LucenePackage.class.getPackage();
>+  }
>+}
>
>  
>
>------------------------------------------------------------------------
>
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