Commons Attributes example source code file (compiler.xml)
The Commons Attributes compiler.xml source code
<?xml version="1.0"?>
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= Copyright 2003-2004 The Apache Software Foundation
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= 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
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= http://www.apache.org/licenses/LICENSE-2.0
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= distributed under the License is distributed on an "AS IS" BASIS,
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<document>
<properties>
<author email="commons-dev@jakarta.apache.org">Jakarta Commons Development Team
<title>Reference - Compiling
</properties>
<body>
<section name="The AttributeCompiler Ant Task">
<p>This is the process your source files have to go through:
<source>|Generated Java Files|
+------------+ +--------------------+
| |
| |
| +-------------+ |
+-------------->|Java Compiler|<------------------+
+-------------+
|
v
+-----------------+
|Java .class files|
+-----------------+]]></source>
<p>
This section will focus on the "Attribute Compiler" step. As is implied by the diagram,
the Attribute Compiler compiles Java source files into other Java source files.
</p>
<p>
This is how the compiler is used:
</p>
<source>
<attribute-compiler
destdir="temp/"
attributepackages="my.attributes;my.otherattributes">
<fileset dir="src/" includes="*.java"/>
</attribute-compiler>]]>
<table>
<tr>
<th>
Parameter
</th>
<th>
Required
</th>
<th>
Description
</th>
</tr>
<tr>
<td>
destdir
</td>
<td>
Yes
</td>
<td>
Destination directory for generated source files
</td>
</tr>
<tr>
<td>
attributepackages
</td>
<td>
No
</td>
<td>
A semi-colon separated list of package names. Attributes in these packages
can be used without specifying their fully-qualified names, even if they are not
in the same package as the class they are being attached to, and even if they
are not imported. (The compiler generates import statements in the generated
source files.)
</td>
</tr>
</table>
<p>
After the attribute compiler has generated the new source files, you should
feed them <b>and your own source files to the Java compiler.
</p>
</section>
<section name="Do I Have to Use the Attribute Compiler?">
<p>
No, you don't. You can add attributes to a class by programmatically
creating an attribute repository in the class's static initializer.
See the Javadoc for
<a href="api/org/apache/commons/attributes/RuntimeAttributeRepository.html">RuntimeAttributeRepository
for an example. <i>It's not pretty, but it works.
</p>
</section>
<section name="How Do I Use It With Maven?">
<p>
If you use Maven you can just install the Commons-Attributes plugin and add the following lines
to your project.properties:
</p>
<source>
<p>
Attribute compilation will happen automatically.
</p>
</section>
</body>
</document>
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