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/*******************************************************************************
* Copyright (c) 2007 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.ui.internal.mappings.details;
import org.eclipse.emf.common.command.CommandStack;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.ITextListener;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.TextEvent;
import org.eclipse.jface.text.TextViewer;
import org.eclipse.jpt.core.internal.mappings.IGenerator;
import org.eclipse.jpt.core.internal.mappings.IId;
import org.eclipse.jpt.core.internal.mappings.JpaCoreMappingsPackage;
import org.eclipse.jpt.ui.internal.details.BaseJpaComposite;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetWidgetFactory;
/**
* GeneratorComposite
*/
public abstract class GeneratorComposite<E extends IGenerator> extends BaseJpaComposite
{
private IId id;
private E generator;
private Adapter generatorListener;
protected ITextViewer nameViewer;
public GeneratorComposite(Composite parent, CommandStack commandStack, TabbedPropertySheetWidgetFactory widgetFactory) {
super(parent, SWT.NULL, commandStack, widgetFactory);
this.generatorListener = buildGeneratorListner();
}
private Adapter buildGeneratorListner() {
return new AdapterImpl() {
public void notifyChanged(Notification notification) {
generatorChanged(notification);
}
};
}
/**
* Builds the Generator specifiedName viewer.
*
* @param parent
* @return
*/
protected ITextViewer buildNameViewer(Composite parent) {
final TextViewer textViewer = new TextViewer(parent, SWT.SINGLE | SWT.BORDER);
textViewer.setDocument(new Document());
textViewer.addTextListener(new ITextListener() {
public void textChanged(TextEvent event) {
if (isPopulating()) {
return;
}
String name = textViewer.getDocument().get();
if (name.equals("")) { //$NON-NLS-1$
if (getGenerator().getName() == null) {
return;
}
name = null;
}
IGenerator generator = getGenerator();
if (generator == null) {
generator = createGenerator();
}
generator.setName(name);
}
});
return textViewer;
}
protected abstract E createGenerator();
@Override
protected void doPopulate(EObject obj) {
this.id = (IId) obj;
if (this.id == null) {
this.generator = null;
return;
}
this.generator = generator(this.id);
if (this.generator == null) {
clear();
return;
}
populateNameViewer();
return;
}
@Override
protected void doPopulate() {
populateNameViewer();
}
protected void engageListeners() {
if (this.generator != null) {
this.generator.eAdapters().add(this.generatorListener);
}
}
protected void disengageListeners() {
if (this.generator != null) {
this.generator.eAdapters().remove(this.generatorListener);
}
}
protected abstract E generator(IId id);
protected IId idMapping() {
return this.id;
}
protected void generatorChanged(Notification notification) {
if (notification.getFeatureID(IGenerator.class) == JpaCoreMappingsPackage.IGENERATOR__NAME) {
final String name = notification.getNewStringValue();
Display.getDefault().asyncExec(new Runnable() {
public void run() {
if (getControl().isDisposed()) {
return;
}
if (nameViewer.getDocument().get() == null || !nameViewer.getDocument().get().equals(name)) {
if (name == null) {
clearNameViewer();
}
else {
nameViewer.getDocument().set(name);
}
}
}
});
}
}
private void populateNameViewer() {
String name = this.getGenerator().getName();
if (name != null) {
if (!this.nameViewer.getDocument().get().equals(name)) {
this.nameViewer.getDocument().set(name);
}
}
else {
this.clearNameViewer();
}
}
protected E getGenerator() {
return this.generator;
}
protected void clear() {
this.clearNameViewer();
}
protected void clearNameViewer() {
this.nameViewer.getDocument().set(""); //$NON-NLS-1$
}
public void dispose() {
disengageListeners();
super.dispose();
}
}
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