| /** |
| * <copyright> |
| * |
| * Copyright (c) 2010, 2013 E.D.Willink 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: |
| * E.D.Willink - Initial API and implementation |
| * |
| * </copyright> |
| * |
| * $Id: LabelGeneratorRegistryReader.java,v 1.2 2010/04/08 06:27:47 ewillink Exp $ |
| */ |
| package org.eclipse.ocl.examples.common.plugin; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.emf.ecore.plugin.RegistryReader; |
| import org.eclipse.jdt.annotation.NonNull; |
| import org.eclipse.jdt.annotation.Nullable; |
| import org.eclipse.ocl.examples.common.label.ILabelGenerator; |
| |
| /** |
| * A plugin extension reader that populates the |
| * {@link ILabelGenerator.Registry#INSTANCE |
| * global} label generator registry. Clients are not expected to use |
| * this class directly. |
| */ |
| public class LabelGeneratorRegistryReader extends RegistryReader |
| { |
| static class LabelGeneratorDescriptor extends PluginClassDescriptor implements ILabelGenerator.Descriptor |
| { |
| protected @Nullable ILabelGenerator<?> labelGenerator; |
| |
| public LabelGeneratorDescriptor(@NonNull IConfigurationElement e, @NonNull String attrName) { |
| super(e, attrName); |
| } |
| |
| public @NonNull ILabelGenerator<?> getLabelGenerator() { |
| ILabelGenerator<?> labelGenerator2 = labelGenerator; |
| if (labelGenerator2 == null) { |
| labelGenerator2 = labelGenerator = (ILabelGenerator<?>) createInstance(); |
| assert labelGenerator2 != null; |
| } |
| return labelGenerator2; |
| } |
| |
| public @NonNull IConfigurationElement getElement() { |
| assert element != null; |
| return element; |
| } |
| } |
| |
| static final @NonNull String TAG_GENERATOR = "generator"; |
| static final @NonNull String ATT_FOR = "for"; |
| static final @NonNull String ATT_CLASS = "class"; |
| |
| protected final @NonNull ILabelGenerator.Registry registry; |
| |
| public LabelGeneratorRegistryReader(@NonNull ILabelGenerator.Registry registry) { |
| super(Platform.getExtensionRegistry(), OCLExamplesCommonPlugin |
| .getPlugin().getBundle().getSymbolicName(), |
| OCLExamplesCommonPlugin.LABEL_GENERATOR_PPID); |
| this.registry = registry; |
| } |
| |
| @Override |
| protected boolean readElement(IConfigurationElement element, boolean add) { |
| if (element.getName().equals(TAG_GENERATOR)) { |
| String helpedClass = element.getAttribute(ATT_FOR); |
| if (helpedClass == null) { |
| logMissingAttribute(element, ATT_FOR); |
| } else if (element.getAttribute(ATT_CLASS) == null) { |
| logMissingAttribute(element, ATT_CLASS); |
| } else { |
| Class<?> loadedClass = null; |
| try { |
| Object createExecutableExtension; |
| try { |
| createExecutableExtension = element.createExecutableExtension(ATT_CLASS); |
| loadedClass = createExecutableExtension.getClass().getClassLoader().loadClass(helpedClass); |
| } catch (CoreException e) { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } |
| } catch (ClassNotFoundException e) { |
| OCLExamplesCommonPlugin.logError("Failed to load '" + helpedClass + "'", e); |
| return false; |
| } |
| if (loadedClass != null) { |
| if (add) { |
| Object previous = registry.install(loadedClass, new LabelGeneratorDescriptor(element, ATT_CLASS)); |
| if (previous instanceof LabelGeneratorDescriptor) { |
| LabelGeneratorDescriptor descriptor = (LabelGeneratorDescriptor) previous; |
| OCLExamplesCommonPlugin.INSTANCE.log("Both '" |
| + descriptor.getElement().getContributor().getName() |
| + "' and '" + element.getContributor().getName() |
| + "' register an invocation delegate factory for '" |
| + helpedClass + "'"); |
| } |
| return true; |
| } else { |
| ILabelGenerator.Registry.INSTANCE.uninstall(loadedClass); |
| return true; |
| } |
| } |
| } |
| } |
| |
| return false; |
| } |
| } |