| /******************************************************************************* |
| * Copyright (c) 2003, 2006 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 |
| *******************************************************************************/ |
| /* |
| * Created on Mar 29, 2004 |
| * |
| * To change the template for this generated file go to |
| * Window - Preferences - Java - Code Generation - Code and Comments |
| */ |
| package org.eclipse.wst.common.componentcore.internal.util; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.eclipse.core.resources.IProject; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.ISafeRunnable; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.jem.util.RegistryReader; |
| import org.eclipse.wst.common.componentcore.internal.ModulecorePlugin; |
| import org.eclipse.wst.common.project.facet.core.IFacetedProject; |
| import org.eclipse.wst.common.project.facet.core.IProjectFacet; |
| import org.eclipse.wst.common.project.facet.core.ProjectFacetsManager; |
| |
| /** |
| * @author cbridgha |
| * |
| * To change the template for this generated type comment go to Window - Preferences - Java - Code |
| * Generation - Code and Comments |
| */ |
| public class ArtifactEditRegistryReader extends RegistryReader { |
| |
| static final String ARTIFACT_EDIT_EXTENSION_POINT = "artifactedit"; //$NON-NLS-1$ |
| static final String ARTIFACTEDIT = "artifactedit"; //$NON-NLS-1$ |
| static final String TYPE = "typeID"; //$NON-NLS-1$ |
| static final String ARTIFACTEDITCLASS = "class"; //$NON-NLS-1$ |
| |
| private static final ArtifactEditRegistryReader instance = new ArtifactEditRegistryReader(); |
| |
| private final Map/*<String, ArtifactEditDescriptor>*/ descriptors = new HashMap(); |
| |
| private final Map/*<ArtifactEditDescriptor, IArtifactEditFactory>*/ instances = new HashMap(); |
| |
| /** |
| * @return Returns the instance. |
| */ |
| public static ArtifactEditRegistryReader instance() { |
| /* already initialized and registry read by the time the class initializes */ |
| return instance; |
| } |
| |
| public ArtifactEditRegistryReader() { |
| super(ModulecorePlugin.PLUGIN_ID, ARTIFACT_EDIT_EXTENSION_POINT); |
| SafeRunner.run(new ISafeRunnable() { |
| |
| public void handleException(Throwable exception) { |
| ModulecorePlugin.logError(0, exception.getMessage(), exception); |
| } |
| |
| public void run() throws Exception { |
| readRegistry(); |
| } |
| |
| }); |
| } |
| |
| /** |
| * @see org.eclipse.wst.common.frameworks.internal.RegistryReader#readElement(org.eclipse.core.runtime.IConfigurationElement) |
| */ |
| public boolean readElement(IConfigurationElement element) { |
| if (ARTIFACTEDIT.equals(element.getName())) { |
| |
| /* Because the only instance of this type is created from a static singleton |
| * field, and the registry is initialized in the constructor of this type, |
| * other threads cannot compete with readElement() for access to <i>descriptors</i> |
| */ |
| String type = element.getAttribute(TYPE); |
| if(type != null) |
| descriptors.put(element.getAttribute(TYPE), new ArtifactEditDescriptor(element)); |
| else |
| ModulecorePlugin.logError(0, "No type attribute is specified for " + //$NON-NLS-1$ |
| ModulecorePlugin.PLUGIN_ID + "." + ARTIFACT_EDIT_EXTENSION_POINT + //$NON-NLS-1$ |
| " extension in " + element.getDeclaringExtension().getNamespaceIdentifier(), null); //$NON-NLS-1$ |
| return true; |
| } |
| return false; |
| } |
| |
| public synchronized IArtifactEditFactory getArtifactEdit(String typeID) { |
| |
| ArtifactEditDescriptor descriptor = (ArtifactEditDescriptor) descriptors.get(typeID); |
| IArtifactEditFactory factory = null; |
| |
| if(descriptor != null) { |
| |
| factory = (IArtifactEditFactory) instances.get(descriptor); |
| |
| if(factory == null) { |
| |
| if((factory = descriptor.createFactory()) != null) { |
| instances.put(descriptor, factory); |
| } else { |
| descriptors.remove(descriptor); |
| } |
| } |
| } |
| return factory; |
| } |
| |
| // TODO Don't like this because it's going to cycle every project facet for each project |
| public IArtifactEditFactory getArtifactEdit(IProject project) { |
| try { |
| IFacetedProject facetedProject = ProjectFacetsManager.create(project); |
| Iterator keys = descriptors.keySet().iterator(); |
| while (keys.hasNext()) { |
| String typeID = (String) keys.next(); |
| try { |
| IProjectFacet projectFacet = ProjectFacetsManager.getProjectFacet(typeID); |
| if (projectFacet != null && facetedProject.hasProjectFacet(projectFacet)) |
| return getArtifactEdit(typeID); |
| } catch (Exception e) { |
| continue; |
| } |
| } |
| } catch (Exception e) { |
| //Just return null |
| } |
| return null; |
| } |
| |
| public class ArtifactEditDescriptor { |
| |
| private final IConfigurationElement element; |
| private final String type; |
| |
| public ArtifactEditDescriptor(IConfigurationElement configElement) { |
| element = configElement; |
| type = element.getAttribute(TYPE); |
| } |
| |
| /** |
| * Create and return an {@link IArtifactEditFactory} for the given descriptor or |
| * <b>null</b> if there are problems instantiating the extension. |
| * @return An {@link IArtifactEditFactory} for the given descriptor or |
| * <b>null</b> if there are problems instantiating the extension. |
| */ |
| public IArtifactEditFactory createFactory() { |
| |
| final IArtifactEditFactory[] factory = new IArtifactEditFactory[1]; |
| |
| SafeRunner.run(new ISafeRunnable() { |
| |
| public void handleException(Throwable exception) { |
| ModulecorePlugin.logError(0, exception.getMessage(), exception); |
| } |
| |
| public void run() throws Exception { |
| factory[0] = (IArtifactEditFactory) element.createExecutableExtension(ARTIFACTEDITCLASS); |
| } |
| |
| }); |
| |
| return factory[0]; |
| } |
| |
| /** |
| * |
| * @return The type id of this ArtifactEdit definition |
| */ |
| public String getType() { |
| return type; |
| } |
| |
| } |
| |
| } |