Bug 17618 Changing output location should delete all derived resources
F1 1) create a project (autobuild on) 2) import Java sources and resources 3) change output folder to project/bin ->all class files are removed (fine) 4) change output folder back to be the project -> all class files are removed (fine) 5) open project/bin -> all resources are still there Note: When opening the properties dialog on such a resource it is tagged as "Derived". Thus, it should be possible to remove all derived resources as long as they have been created by the Java builder.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/BuildPathsBlock.java
* Validates output location & build path.
	 */	
	private void updateBuildPathStatus() {
		fOutputLocationPath= null;
		
		String text= fBuildPathDialogField.getText();
		if ("".equals(text)) { 
			fBuildPathStatus.setError(NewWizardMessages.getString("BuildPathsBlock.error.EnterBuildPath")); 
			return;
		}
		IPath path= getOutputLocation();
		
		IResource res= fWorkspaceRoot.findMember(path);
		if (res != null) {
			
			if (res.getType() == IResource.FILE) {
				fBuildPathStatus.setError(NewWizardMessages.getString("BuildPathsBlock.error.InvalidBuildPath")); 
				return;
			}
		}
		fOutputLocationPath= path;
		
		List elements= fClassPathList.getElements();
		IClasspathEntry[] entries= new IClasspathEntry[elements.size()];
		boolean outputFolderAlsoSourceFolder= false;
		
		for (int i= elements.size()-1 ; i >= 0 ; i--) {
			CPListElement currElement= (CPListElement)elements.get(i);
			entries[i]= currElement.getClasspathEntry();
			if (currElement.getEntryKind() == IClasspathEntry.CPE_SOURCE && fOutputLocationPath.equals(currElement.getPath())) {