ANT task to interate through sub directories

Question

I want to execute the same ANT target over a number of subdirectories. I also need to "pass" or set and environment variable which is the sub-directory name and pass it to the ANT target. I have researched the documentation, but have found no task that will do this. Any suggestions, short of writing my own ANT task?
thanks
Don

Answer 1

OK, so I wrote my own task, but I am having a bit of a problem:
creating an Ant task which loops through subdirectories and then calls an Ant target ? this is easy enough through the project.executeTarget method. I pass the subdirectory name as a property to the ?called? target. This I do through the project.setProperty method.
Yet the target only has the original value of the property and not the modified value. I am assuming that this is because once a target and its tasks are loaded, the properties are then fixed ? immutable.
So my strategy is to ?refresh? the target before my task executes the target. I was thinking to create a new target, do a shallow copy of info, copy to the project and then execute the new target. Thoughts? Other ideas?
Here is the sample ANT build code:
  <target name="build" >
      <IterateDirectoryTask RootDirectory="." ExecuteTarget="TestTarget"/>
  </target>
  <target name="TestTarget" >
      <echo message="Hello from TestTarget" />
      <echo message="   subdirectory = ${subdirectory}" />
  </target> And here is the TASK:
public class IterateDirectoryTask extends Task {
      private String _rootDirectory;
      private String _executeTargetName;
      public void setRootDirectory(String aDirectoryName) {
            _rootDirectory = aDirectoryName;
      public void setExecuteTarget(String aTargetName) {
            _executeTargetName =  aTargetName;
      public void execute() throws BuildException {
            if (_executeTargetName == null) {
                  throw new BuildException("ExecuteTarget must be specified");
            File lRootDirectory = new File(_rootDirectory);
            if (!lRootDirectory.isDirectory()) {
                  throw new BuildException("'"+_rootDirectory+"' is not a directory");
            File[] lFiles = lRootDirectory.listFiles();
            for (int i=0; i < lFiles.length; i++) {
                  if (lFiles.isDirectory()) {
project.setProperty("subdirectory", lFiles[i].getName());
Target lTarget = (Target)project.getTargets().get(_executeTargetName);
project.executeTarget(_executeTargetName);