| /******************************************************************************* |
| * Copyright (c) 2003, 2005 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.j2ee.navigator.internal; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| 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.resources.ResourcesPlugin; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.jem.util.logger.proxy.Logger; |
| import org.eclipse.swt.SWTError; |
| import org.eclipse.swt.SWTException; |
| import org.eclipse.wst.common.componentcore.ArtifactEdit; |
| import org.eclipse.wst.common.componentcore.ComponentCore; |
| import org.eclipse.wst.common.componentcore.resources.IVirtualComponent; |
| import org.eclipse.wst.common.internal.emfworkbench.integration.EditModel; |
| import org.eclipse.wst.common.internal.emfworkbench.integration.EditModelEvent; |
| import org.eclipse.wst.common.internal.emfworkbench.integration.EditModelListener; |
| |
| /** |
| * <p> |
| * The following class is experimental until fully documented. |
| * </p> |
| */ |
| public class EMFRootObjectManager implements EditModelListener, IResourceChangeListener, IResourceDeltaVisitor { |
| |
| |
| |
| private final Map projectEditModels = new HashMap(); |
| private final Map projectRootObjects = new HashMap(); |
| |
| private final List listeners = new ArrayList(); |
| |
| public interface IRefreshHandlerListener { |
| void onRefresh(Object element); |
| } |
| |
| /** |
| * |
| */ |
| public EMFRootObjectManager() { |
| super(); |
| ResourcesPlugin.getWorkspace().addResourceChangeListener(this); |
| } |
| |
| |
| |
| public void dispose() { |
| if (projectEditModels == null) |
| return; |
| ResourcesPlugin.getWorkspace().removeResourceChangeListener(this); |
| EditModel editModel = null; |
| Object[] keys = projectEditModels.keySet().toArray(); |
| for (int i = 0; i < keys.length; i++) { |
| editModel = (EditModel) projectEditModels.remove(keys[i]); |
| if (editModel != null) { |
| editModel.removeListener(this); |
| editModel.releaseAccess(this); |
| } |
| } |
| } |
| |
| public Object getRootObject(IProject project) { |
| if (project == null || !project.isAccessible()) |
| return null; |
| |
| Object rootObject = null; |
| synchronized (projectRootObjects) { |
| rootObject = projectRootObjects.get(project); |
| |
| if (rootObject == null || ((EObject) rootObject).eResource() == null) { |
| EditModel editModel = getEditModelForProject(project); |
| if (editModel != null) { |
| rootObject = editModel.getPrimaryRootObject(); |
| projectRootObjects.put(project, rootObject); |
| } |
| } |
| } |
| return rootObject; |
| } |
| |
| |
| protected EditModel getEditModelForProject(IProject project) { |
| if (project == null) |
| return null; |
| EditModel editModel = null; |
| synchronized (projectEditModels) { |
| editModel = (EditModel) projectEditModels.get(project); |
| IVirtualComponent component = ComponentCore.createComponent(project); |
| ArtifactEdit artifactEdit = null; |
| try { |
| if (editModel == null && project.isAccessible()) { |
| artifactEdit = ArtifactEdit.getArtifactEditForRead(component); |
| if (artifactEdit != null) { |
| editModel = (EditModel) artifactEdit.getAdapter(EditModel.class); |
| if (editModel != null) { |
| editModel.addListener(this); |
| addMapping(project, editModel); |
| } |
| } |
| } |
| } finally { |
| if (artifactEdit!=null) |
| artifactEdit.dispose(); |
| } |
| } |
| return editModel; |
| } |
| |
| protected void addMapping(IProject project, EditModel editModel) { |
| projectEditModels.put(project, editModel); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.wst.common.internal.emfworkbench.integration.EditModelListener#editModelChanged(org.eclipse.wst.common.internal.emfworkbench.integration.EditModelEvent) |
| */ |
| public void editModelChanged(EditModelEvent anEvent) { |
| IProject affectedProject = anEvent.getEditModel().getProject(); |
| switch (anEvent.getEventCode()) { |
| case EditModelEvent.UNLOADED_RESOURCE : |
| case EditModelEvent.REMOVED_RESOURCE : { |
| Object oldRootObject = projectRootObjects.remove(affectedProject); |
| if (oldRootObject != null) |
| notifyListeners(affectedProject); |
| } |
| break; |
| case EditModelEvent.SAVE : { |
| Object oldRootObject = projectRootObjects.get(affectedProject); |
| if (oldRootObject == null) |
| notifyListeners(affectedProject); |
| } |
| break; |
| case EditModelEvent.PRE_DISPOSE : |
| disposeCache(affectedProject); |
| break; |
| default : |
| break; |
| } |
| } |
| |
| |
| /** |
| * @param aProject |
| */ |
| private void notifyListeners(IProject aProject) { |
| for (int x = 0; x < listeners.size(); ++x) { |
| IRefreshHandlerListener refreshHandler = (IRefreshHandlerListener) listeners.get(x); |
| refreshHandler.onRefresh(aProject); |
| } |
| |
| } |
| |
| |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.resources.IResourceChangeListener#resourceChanged(org.eclipse.core.resources.IResourceChangeEvent) |
| */ |
| public void resourceChanged(IResourceChangeEvent event) { |
| final IResourceDelta delta = event.getDelta(); |
| |
| if (delta != null) { |
| try { |
| delta.accept(EMFRootObjectManager.this); |
| } catch (CoreException e) { |
| Logger.getLogger().logError(e); |
| } catch (SWTException swte) { |
| Logger.getLogger().logError(swte); |
| } catch (SWTError swte) { |
| Logger.getLogger().logError(swte); |
| } |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.resources.IResourceDeltaVisitor#visit(org.eclipse.core.resources.IResourceDelta) |
| */ |
| public boolean visit(IResourceDelta delta) throws CoreException { |
| IResource resource = delta.getResource(); |
| if (resource != null) { |
| switch (resource.getType()) { |
| case IResource.ROOT : |
| return true; |
| case IResource.PROJECT : |
| boolean projectOpenStateChanged = ((delta.getFlags() & IResourceDelta.OPEN) != 0); |
| if (delta.getKind() == IResourceDelta.REMOVED || projectOpenStateChanged) |
| disposeCache((IProject) resource); |
| return false; |
| } |
| } |
| return false; |
| } |
| |
| |
| protected void disposeCache(IProject affectedProject) { |
| synchronized (projectEditModels) { |
| projectRootObjects.remove(affectedProject); |
| //System.out.println("REMOVING edit model: " + affectedProject.getName()); |
| EditModel editModel = (EditModel) projectEditModels.remove(affectedProject); |
| //System.out.println("REMOVED edit model " + affectedProject.getName()); |
| if (editModel != null) { |
| editModel.removeListener(this); |
| editModel.releaseAccess(this); |
| //System.out.println("RELEASED edit model " + affectedProject.getName()); |
| } |
| } |
| } |
| |
| public void addRefreshHandlerListener(IRefreshHandlerListener aListener) { |
| synchronized (getListeners()) { |
| if (aListener != null && !getListeners().contains(aListener)) |
| getListeners().add(aListener); |
| } |
| } |
| |
| public void removeRefreshHandlerListener(IRefreshHandlerListener aListener) { |
| synchronized (listeners) { |
| listeners.remove(aListener); |
| } |
| } |
| |
| /** |
| * Insert the method's description here. Creation date: (4/11/2001 4:42:58 PM) |
| * |
| * @return java.util.List |
| */ |
| protected java.util.List getListeners() { |
| return listeners; |
| } |
| |
| } |