| /******************************************************************************* |
| * Copyright (c) 2007, 2009 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.utility.internal.model.AbstractModel; |
| import org.eclipse.jpt.utility.internal.model.CallbackChangeSupport; |
| import org.eclipse.jpt.utility.internal.model.ChangeSupport; |
| |
| /** |
| * Java resource containment hierarchy |
| */ |
| public abstract class AbstractJavaResourceNode |
| extends AbstractModel |
| implements JavaResourceNode |
| { |
| protected final JavaResourceNode parent; |
| |
| |
| // ********** constructor ********** |
| |
| protected AbstractJavaResourceNode(JavaResourceNode parent) { |
| super(); |
| this.checkParent(parent); |
| this.parent = 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 |
| } |
| |
| |
| // ********** change support callback hook ********** |
| |
| @Override |
| protected final ChangeSupport buildChangeSupport() { |
| return new CallbackChangeSupport(this, this.buildChangeSupportListener()); |
| } |
| |
| private CallbackChangeSupport.Listener buildChangeSupportListener() { |
| return new CallbackChangeSupport.Listener() { |
| public void aspectChanged(String aspectName) { |
| AbstractJavaResourceNode.this.aspectChanged(aspectName); |
| } |
| }; |
| } |
| |
| /** |
| * ignore the aspect name, we notify listeners of *every* change |
| */ |
| protected void aspectChanged(@SuppressWarnings("unused") String aspectName) { |
| this.getRoot().resourceModelChanged(); |
| } |
| |
| |
| // ********** JavaResourceNode implementation ********** |
| |
| /** |
| * @see org.eclipse.jpt.core.internal.resource.java.source.SourceCompilationUnit#getRoot() |
| * @see org.eclipse.jpt.core.internal.resource.java.binary.BinaryPackageFragmentRoot#getRoot() |
| * @see org.eclipse.jpt.core.internal.resource.java.binary.BinaryPersistentTypeCache#getRoot() |
| */ |
| public Root getRoot() { |
| return this.parent.getRoot(); |
| } |
| |
| public IFile getFile() { |
| return this.getRoot().getFile(); |
| } |
| |
| |
| // ********** convenience methods ********** |
| |
| protected JpaAnnotationProvider getAnnotationProvider() { |
| return this.getRoot().getAnnotationProvider(); |
| } |
| |
| } |