jpa/plugins/org.eclipse.jpt.eclipselink.ui/src/org/eclipse/jpt/eclipselink/ui/internal/options/EventListenerComposite.java

/*******************************************************************************
* Copyright (c) 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.eclipselink.ui.internal.options;

import org.eclipse.core.resources.IProject;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jpt.eclipselink.core.internal.context.options.Options;
import org.eclipse.jpt.eclipselink.ui.internal.EclipseLinkUiMessages;
import org.eclipse.jpt.eclipselink.ui.internal.JptEclipseLinkUiPlugin;
import org.eclipse.jpt.ui.internal.widgets.AbstractPane;
import org.eclipse.jpt.ui.internal.widgets.ClassChooserPane;
import org.eclipse.jpt.utility.internal.model.value.PropertyAspectAdapter;
import org.eclipse.jpt.utility.model.value.WritablePropertyValueModel;
import org.eclipse.swt.widgets.Composite;

/**
 *  EventListenerComposite
 */
public class EventListenerComposite extends AbstractPane<Options>
{
	/**
	 * Creates a new <code>EventListenerComposite</code>.
	 *
	 * @param parentPane The parent pane of this one
	 * @param parent The parent container
	 */
	public EventListenerComposite(AbstractPane<? extends Options> parentPane,
                           Composite parent) {

		super(parentPane, parent);
	}

	private ClassChooserPane<Options> initializeClassChooser(Composite container) {

		return new ClassChooserPane<Options>(this, container) {

			@Override
			protected WritablePropertyValueModel<String> buildTextHolder() {
				return new PropertyAspectAdapter<Options, String>(
							this.getSubjectHolder(), Options.SESSION_EVENT_LISTENER_PROPERTY) {
					@Override
					protected String buildValue_() {
						return this.subject.getEventListener();
					}

					@Override
					protected void setValue_(String value) {

						if (value.length() == 0) {
							value = null;
						}
						this.subject.setEventListener(value);
					}
				};
			}

			@Override
			protected String className() {
				return this.subject().getEventListener();
			}

			@Override
			protected String labelText() {
				return EclipseLinkUiMessages.PersistenceXmlOptionsTab_eventListenerLabel;
			}

			@Override
			protected IPackageFragmentRoot packageFragmentRoot() {
				IProject project = this.subject().getJpaProject().getProject();
				IJavaProject root = JavaCore.create(project);

				try {
					return root.getAllPackageFragmentRoots()[0];
				}
				catch (JavaModelException e) {
					JptEclipseLinkUiPlugin.log(e);
				}
				return null;
			}

			@Override
			protected void promptType() {
				IType type = chooseType();

				if (type != null) {
					String className = type.getFullyQualifiedName('.');
					this.subject().setEventListener(className);
				}
			}
		};
	}

	/*
	 * (non-Javadoc)
	 */
	@Override
	protected void initializeLayout(Composite container) {
		this.initializeClassChooser(container);
	}
}