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/*******************************************************************************
* Copyright (c) 2006, 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;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import org.eclipse.core.resources.IFile;
import org.eclipse.jpt.core.JpaFile;
import org.eclipse.jpt.core.JpaProject;
import org.eclipse.jpt.core.JpaStructureNode;
import org.eclipse.jpt.core.ResourceModelListener;
import org.eclipse.jpt.utility.internal.ListenerList;
import org.eclipse.jpt.utility.internal.iterators.CloneIterator;
/**
* The transition between a JPA project and the resource model associated
* with a file.
* Maintain a list of resource model listeners (namely, the JPA project).
* Hold the associated root structure nodes, which are hooks to the
* context model.
*/
public abstract class AbstractJpaFile
extends AbstractJpaNode
implements JpaFile
{
private final IFile file;
private final Hashtable<Object, JpaStructureNode> rootStructureNodes;
private final ResourceModelListener resourceModelListener;
private final ListenerList<ResourceModelListener> resourceModelListenerList;
// ********** construction **********
protected AbstractJpaFile(JpaProject jpaProject, IFile file) {
super(jpaProject);
this.file = file;
this.rootStructureNodes = new Hashtable<Object, JpaStructureNode>();
this.resourceModelListener = this.buildResourceModelListener();
this.resourceModelListenerList = new ListenerList<ResourceModelListener>(ResourceModelListener.class);
}
/**
* Changes to ROOT_STRUCTURE_NODES_COLLECTION do not need to trigger a
* project update. Only the UI cares about the root structure nodes.
* If an project update is allowed to happen, an infinite loop will result
* if any java class is specified in more than one location in the
* persistence unit.
*/
@Override
protected void addNonUpdateAspectNamesTo(Set<String> nonUpdateAspectNames) {
super.addNonUpdateAspectNamesTo(nonUpdateAspectNames);
nonUpdateAspectNames.add(ROOT_STRUCTURE_NODES_COLLECTION);
}
protected ResourceModelListener buildResourceModelListener() {
return new ResourceModelListener() {
public void resourceModelChanged() {
AbstractJpaFile.this.resourceModelChanged();
}
};
}
// ********** file **********
public IFile getFile() {
return this.file;
}
// ********** resource model listeners **********
protected ResourceModelListener getResourceModelListener() {
return this.resourceModelListener;
}
public void addResourceModelListener(ResourceModelListener listener) {
this.resourceModelListenerList.add(listener);
}
public void removeResourceModelListener(ResourceModelListener listener) {
this.resourceModelListenerList.remove(listener);
}
protected void resourceModelChanged() {
for (ResourceModelListener listener : this.resourceModelListenerList.getListeners()) {
listener.resourceModelChanged();
}
}
// ********** root structure nodes **********
public Iterator<JpaStructureNode> rootStructureNodes() {
return new CloneIterator<JpaStructureNode>(this.rootStructureNodes.values());
}
public int rootStructureNodesSize() {
return this.rootStructureNodes.size();
}
public void addRootStructureNode(Object key, JpaStructureNode rootStructureNode) {
JpaStructureNode old = this.rootStructureNodes.put(key, rootStructureNode);
if (rootStructureNode != old) {
if (old != null) {
this.fireItemRemoved(ROOT_STRUCTURE_NODES_COLLECTION, old);
}
this.fireItemAdded(ROOT_STRUCTURE_NODES_COLLECTION, rootStructureNode);
}
}
public void removeRootStructureNode(Object key) {
this.fireItemRemoved(ROOT_STRUCTURE_NODES_COLLECTION, this.rootStructureNodes.remove(key));
}
public JpaStructureNode getStructureNode(int textOffset) {
synchronized (this.rootStructureNodes) {
for (JpaStructureNode rootNode : this.rootStructureNodes.values()) {
JpaStructureNode node = rootNode.getStructureNode(textOffset);
if (node != null) {
return node;
}
}
}
return null;
}
// ********** misc **********
@Override
public void toString(StringBuilder sb) {
sb.append(this.file);
sb.append('[');
sb.append(this.getResourceType());
sb.append(']');
}
}
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