| /******************************************************************************* |
| * Copyright (c) 2007, 2008 Oracle. 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: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.core.internal.resource.java; |
| |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.jpt.core.JpaAnnotationProvider; |
| import org.eclipse.jpt.core.resource.java.JavaResourceNode; |
| import org.eclipse.jpt.core.resource.java.JpaCompilationUnit; |
| import org.eclipse.jpt.utility.internal.model.AbstractModel; |
| import org.eclipse.jpt.utility.internal.model.CallbackChangeSupport; |
| import org.eclipse.jpt.utility.internal.model.ChangeSupport; |
| |
| /** |
| * resource containment hierarchy |
| */ |
| public abstract class AbstractJavaResourceNode |
| extends AbstractModel |
| implements JavaResourceNode, CallbackChangeSupport.Source |
| { |
| private final JavaResourceNode parent; |
| |
| |
| // ********** construction ********** |
| |
| protected AbstractJavaResourceNode(JavaResourceNode parent) { |
| super(); |
| this.checkParent(parent); |
| this.parent = parent; |
| } |
| |
| protected void checkParent(JavaResourceNode p) { |
| if (p == null) { |
| if (this.requiresParent()) { |
| throw new IllegalArgumentException("'parent' cannot be null"); //$NON-NLS-1$ |
| } |
| } else { |
| if (this.forbidsParent()) { |
| throw new IllegalArgumentException("'parent' must be null"); //$NON-NLS-1$ |
| } |
| } |
| } |
| |
| protected boolean requiresParent() { |
| return true; |
| } |
| |
| protected boolean forbidsParent() { |
| return ! this.requiresParent(); // assume 'parent' is not optional |
| } |
| |
| @Override |
| protected ChangeSupport buildChangeSupport() { |
| return new CallbackChangeSupport(this); |
| } |
| |
| |
| // ********** JavaResourceNode implementation ********** |
| |
| public JpaCompilationUnit getJpaCompilationUnit() { |
| return this.parent.getJpaCompilationUnit(); |
| } |
| |
| public IFile getFile() { |
| return (IFile) this.getJpaCompilationUnit().getCompilationUnit().getResource(); |
| } |
| |
| |
| // ********** CallbackChangeSupport.Source implementation ********** |
| |
| public void aspectChanged(String aspectName) { |
| this.getJpaCompilationUnit().resourceModelChanged(); |
| } |
| |
| |
| // ********** convenience methods ********** |
| |
| protected JavaResourceNode getParent() { |
| return this.parent; |
| } |
| |
| protected JpaAnnotationProvider getAnnotationProvider() { |
| return this.getJpaCompilationUnit().getAnnotationProvider(); |
| } |
| |
| } |