/* 
 * Copyright (c) 2008 Stiftung Deutsches Elektronen-Synchrotron, 
 * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY.
 *
 * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS. 
 * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED 
 * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND 
 * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR 
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE 
 * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR 
 * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. 
 * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
 * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, 
 * OR MODIFICATIONS.
 * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION, 
 * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS 
 * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY 
 * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM
 */
 package org.csstudio.sds.internal;

import org.csstudio.sds.internal.rules.RuleService;
import org.eclipse.core.resources.IFile;
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;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Deprecated
public class SdsResourceChangeListener implements IResourceChangeListener {

    private static final Logger LOG = LoggerFactory.getLogger(SdsResourceChangeListener.class);

	/**
	 * The used resource delta visitor.
	 */
	private IResourceDeltaVisitor _visitor;

	public SdsResourceChangeListener() {
		_visitor = new DeltaVisitor();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void resourceChanged(IResourceChangeEvent event) {
		try {
			event.getDelta().accept(_visitor);
		} catch (CoreException e) {
			LOG.error(e.toString());
		}
	}

	private class DeltaVisitor implements IResourceDeltaVisitor {

		@Override
		public boolean visit(IResourceDelta delta) throws CoreException {
			boolean result = true;
			IResource resource = delta.getResource();
			// FIXME: Sven Wende: Soll das wirklich auf jedem File passieren? Es muss zus�tzlich nach Dateitypen gefiltert werden!
			if (resource instanceof IFile) {
				result = false;
				if (delta.getKind() == IResourceDelta.CHANGED) {
					RuleService.getInstance().updateScriptedRule(
							resource.getName(), (IFile) resource);
				} 
				else if (delta.getKind() == IResourceDelta.REMOVED) {
					RuleService.getInstance().updateScriptedRule(
							resource.getName(), null);
				}
			} 
			else if (resource instanceof IProject) {
				result = RuleService.SCRIPT_PROJECT_NAME.equals(resource
						.getName());
			}

			return result;
		}
	}

}