Support for Eclipse JDT Compiler

[Christopher Oliver]

I've just committed changes to support using the Eclipse JDT compiler 
(http://www.eclipse.org/documentation/html/plugins/org.eclipse.jdt.doc.isv/doc/reference/api/index.html) 
  as an embedded Java compiler for Cocoon.

To use this compiler modify your cocoon.xconf like this:

<programming-languages>
    <java-language logger="core.language.java" name="java">
      <!-- Specifies which formatter to use to format source code.
           This parameter is optional.
           It is commented out because of bug #5689: Java 
"code-formatter" incorrectly formats double values -->
      <!--parameter name="code-formatter" 
value="org.apache.cocoon.components.language.programming.java.JstyleFormatter"/-->
      <!-- A singleton-like implementation of a ClassLoader -->
      <parameter name="class-loader" 
value="org.apache.cocoon.components.classloader.ClassLoaderManagerImpl"/>
      <!-- Compiler parameter specifies which class to use to compile Java.
      <parameter name="compiler" 
value="org.apache.cocoon.components.language.programming.java.EclipseJavaCompiler"/>

    </java-language>

This compiler has no dependency on the CLASSPATH environment variable 
but instead relies on the thread context class loader to load dependent 
classes.

I think this will solve 
http://nagoya.apache.org/bugzilla/show_bug.cgi?id=16580>

Please test it and let me know of any problems.

Regards,

Chris