Plugin Utilities Realease-Notes
Author: Manfred Duchrow
Copyright (c) 2003-2007, by Manfred Duchrow. All rights reserved.
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VERSION 1.5 ( March 2, 2007 )

* New classes and interfaces
  > IInitializablePlugin
  > PluginHolder
  > PluginRegistry

* ClassRegistry
  > Changed
    - public boolean remove( Object key )
    Bug: Did not work!

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VERSION 1.4.2 ( June 3, 2006 )

* PluginUtil
  > Changed visibility of constructor PluginUtil() from private to 
    protected

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VERSION 1.4.1 ( April 8, 2006 )

* PluginUtilTest
  > Changed test_getPluginClasspath_3() to concatenate classpath entries 
    correctly 

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VERSION 1.4 ( March 25, 2006 )

* PluginUtil
  > Internal refactoring - delegates now more to FileUtil

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VERSION 1.3 ( December 27, 2004 )

* PluginCollector
  > Added support for plug-in properties files from within Eclipse (3.0)
  
  > New methods 
    - public ClassRegistry loadPlugins( String filename, Classpath classpath )
    - public Classpath getPluginClasspath()
    
  > With system property "org.pf.plugin.path" it is possible to define
    an explicit classpath to be looked up when searching for plug-ins.
    Such a classpath may contain patterns for Java archives (e.g. *.jar).
    Example: -Dorg.pf.plugin.path=c:/test/classes;c:/plugins/lib/*.jar

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VERSION 1.2 ( December 22, 2003 )

* PluginCollector
  - Added a system property to switch on the debug mode of this class:
    -Dorg.pf.plugin.PluginCollector.debug=true
    This will trace the lookup and registration of plugin definitions
    to stdout.

  - Changed to extract the classpath from the manifest file if the
    program was started via -jar option
    
  - Lookup the directories defined by system property "java.ext.dirs"
    as well for potential plug-ins.

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VERSION 1.1 ( February 28, 2003 )

* New methods in ClassRegistry
  - String[] keys()
  - CalssInfo[] values()
  - Class[] classes()
  - String[] classNames()
  - ClassInfo getClassInfo( key )

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VERSION 1.0 ( February 7, 2003 )

* ClassRegistry

* PluginCollector

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