Unions of PropertySets

[Matthew Nelson]

I'm having some difficulty creating unions of PropertySets for a series 
of subprojects in my build ... even when I copy the sample code directly 
from the Ant documentation! It just doesn't work. Am I doing something 
naively wrong, or is this a problem with Ant? A build script that 
demonstrates my problem is included below.

The only oddity worth noting is in the debug output. Just before 
creating each PropertySet reference, Ant outputs the following:

-----
Could not load a dependent class 
(com/sun/media/jai/codec/FileSeekableStream) for type image
Could not load a dependent class (com/jcraft/jsch/UserInfo) for type sshexec
Could not load a dependent class (com/jcraft/jsch/UserInfo) for type scp
Could not load class (org.apache.tools.ant.tasksdefs.cvslib.CvsVersion) 
for type cvsversion
-----

I'm using JDK 1.5.0 and Ant 1.6.2.
- Matthew
---------
build.xml
---------
<?xml version="1.0" encoding="UTF-8"?>
<project default="build">
  <property name="fooA" value="FooA"/>
  <property name="barB" value="BarB"/>
  <propertyset id="properties-starting-with-foo">
    <propertyref prefix="foo"/>
  </propertyset>
  <propertyset id="properties-starting-with-bar">
    <propertyref prefix="bar"/>
  </propertyset>
  <propertyset id="my-set">
    <propertyset refid="properties-starting-with-foo"/>
    <propertyset refid="properties-starting-with-bar"/>
  </propertyset>
  <target name="build">
    <ant dir="subproject" target="build" inheritAll="false">
      <propertyset refid="properties-starting-with-foo"/>
    </ant>
    <ant dir="subproject" target="build" inheritAll="false">
      <propertyset refid="properties-starting-with-bar"/>
    </ant>
    <ant dir="subproject" target="build" inheritAll="false">
      <propertyset refid="my-set"/>
    </ant>
  </target>
</project>
--------------------
subproject/build.xml
--------------------
<?xml version="1.0" encoding="UTF-8"?>
<project>
  <target name="build">
    <echo message="${fooA}"/>
    <echo message="${barB}"/>
  </target>
</project>
------
Output
------
$ ant
Buildfile: build.xml
build:
build:
     [echo] FooA
     [echo] ${barB}
build:
     [echo] ${fooA}
     [echo] BarB
build:
     [echo] ${fooA}
     [echo] ${barB}
BUILD SUCCESSFUL
Total time: 1 second
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