/*
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.guvnor.tools;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.resources.IFile;
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.resources.IWorkspace;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.PlatformUI;
import org.guvnor.tools.utils.GuvnorMetadataProps;
import org.guvnor.tools.utils.GuvnorMetadataUtils;
import org.guvnor.tools.utils.PlatformUtils;
/**
* Updates local Guvnor properties when changes occur in the Eclipse workspace.
*/
public class ResourceChangeListener implements IResourceChangeListener {
public void resourceChanged(IResourceChangeEvent event) {
final List<IResource> toDelete = new ArrayList<IResource>();
try {
if (event.getDelta() != null) {
event.getDelta().accept(new IResourceDeltaVisitor() {
public boolean visit(IResourceDelta delta) throws CoreException {
try {
if (delta.getResource() == null || !delta.getResource().isAccessible()) {
return false;
}
if (delta.getKind() == IResourceDelta.ADDED) {
handleResourceAdded(delta.getResource());
}
if (delta.getKind() == IResourceDelta.CHANGED) {
handleResourceChanged(delta.getResource());
}
if (delta.getKind() == IResourceDelta.REMOVED) {
handleResourceDelete(delta.getResource(), toDelete);
}
if (delta.getMovedFromPath() != null) {
handleResourceMoved(delta.getResource(), delta.getMovedFromPath());
}
} catch (Exception e) {
Activator.getDefault().writeLog(IStatus.ERROR, e.getMessage(), e);
}
return true;
}
});
deleteResources(toDelete);
}
} catch (Exception e) {
Activator.getDefault().writeLog(IStatus.ERROR, e.getMessage(), e);
}
}
private void handleResourceAdded(IResource resource) throws Exception {
if (GuvnorMetadataUtils.isGuvnorMetadata(resource)) {
// Look for the corresponding file
IFile target = GuvnorMetadataUtils.getGuvnorControlledResource(resource);
if (target != null) {
GuvnorMetadataUtils.markCurrentGuvnorResource(target);
}
} else {
// Look for the corresponding metadata
if (GuvnorMetadataUtils.isGuvnorControlledResource(resource)) {
GuvnorMetadataUtils.markCurrentGuvnorResource(resource);
}
}
}
private void handleResourceChanged(IResource resource) throws CoreException {
if (GuvnorMetadataUtils.getGuvnorResourceProperty(resource) != null) {
GuvnorMetadataUtils.markExpiredGuvnorResource(resource);
PlatformUtils.updateDecoration();
}
}
private void deleteResources(final List<IResource> resources) throws CoreException {
Display display = PlatformUI.getWorkbench().getDisplay();
display.asyncExec(new Runnable() {
public void run() {
IWorkspace ws = Activator.getDefault().getWorkspace();
try {
IResource[] res = new IResource[resources.size()];
resources.toArray(res);
ws.delete(res, true, null);
} catch (CoreException e) {
Activator.getDefault().writeLog(IStatus.ERROR, e.getMessage(), e);
}
}
});
}
private void handleResourceDelete(IResource resource, List<IResource> resources) {
final IFile mdFile = GuvnorMetadataUtils.findGuvnorMetadata(resource);
if (mdFile == null) {
return;
}
resources.add(mdFile);
}
private void handleResourceMoved(final IResource resource, IPath fromPath) throws Exception {
IFile mdFile = GuvnorMetadataUtils.findGuvnorMetadata(fromPath);
if (mdFile == null) {
return;
}
final GuvnorMetadataProps mdProps = GuvnorMetadataUtils.loadGuvnorMetadata(mdFile);
Display display = PlatformUI.getWorkbench().getDisplay();
display.asyncExec(new Runnable() {
public void run() {
try {
GuvnorMetadataUtils.setGuvnorMetadataProps(resource.getFullPath(), mdProps);
} catch (Exception e) {
Activator.getDefault().writeLog(IStatus.ERROR, e.getMessage(), e);
}
}
});
}
}