org.eclipse.jdt.apt.core/src/org/eclipse/jdt/apt/core/internal/generatedfile/ResourceChangedListener.java

/*******************************************************************************
 * Copyright (c) 2005 BEA Systems, Inc. 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    mkaufman@bea.com - initial API and implementation
 *    
 *******************************************************************************/

package org.eclipse.jdt.apt.core.internal.generatedfile;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.IResourceDeltaVisitor;
import org.eclipse.core.runtime.CoreException;

public class ResourceChangedListener implements IResourceChangeListener 
{
	/* package */ ResourceChangedListener()
	{
	}
	
	public void resourceChanged(IResourceChangeEvent event) 
	{
		if ( event.getType() == IResourceChangeEvent.PRE_BUILD )
		{
			try
			{ 
				event.getDelta().accept( new PreBuildVisitor() );
			}
			catch ( CoreException ce )
			{
				// TODO:  handle exception here.
				ce.printStackTrace();
			}
		}
		else if ( event.getType() == IResourceChangeEvent.PRE_CLOSE )
		{
			IProject p = (IProject)event.getResource();
			GeneratedFileManager gfm = GeneratedFileManager.getGeneratedFileManager( p );
			gfm.projectClosed();
		}
		else if ( event.getType() == IResourceChangeEvent.PRE_DELETE )
		{
			// TODO:  need to update projectDeleted() to delete the generated_src folder
			// in an async thread.  The resource tree is locked here.
			IProject p = (IProject)event.getResource();
			GeneratedFileManager gfm = GeneratedFileManager.getGeneratedFileManager( p );
			gfm.projectDeleted();
		}
	}

	public class PreBuildVisitor implements IResourceDeltaVisitor
	{

		public boolean visit(IResourceDelta delta) throws CoreException 
		{
			IResource r = delta.getResource();
			
			if ( delta.getKind() == IResourceDelta.REMOVED && r instanceof IFile)
			{
				for (GeneratedFileManager gfm : GeneratedFileManager.getGeneratedFileManagers()) {
					IFile f = (IFile)r;
					if ( gfm.isParentFile( f ) )
					{
						gfm.parentFileDeleted( (IFile) r, null /* progress monitor */ );
					}
					else if ( gfm.isGeneratedFile( f ) )
					{
						gfm.generatedFileDeleted( f, null /*progress monitor */ );
					}
				}
			}
				
			if ( delta.getKind() == IResourceDelta.REMOVED && r instanceof IFolder )
			{
				// handle delete of generated source folder
			}

			return true;
		}		
	}
	
	
	

	
}