/*******************************************************************************
 * Copyright (c) 2010, 2011 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.jpa.ui.internal.jpa2.details;

import org.eclipse.jpt.common.ui.internal.util.ControlSwitcher;
import org.eclipse.jpt.common.ui.internal.widgets.Pane;
import org.eclipse.jpt.common.utility.internal.Transformer;
import org.eclipse.jpt.common.utility.internal.model.value.PropertyAspectAdapter;
import org.eclipse.jpt.common.utility.model.value.PropertyValueModel;
import org.eclipse.jpt.common.utility.model.value.WritablePropertyValueModel;
import org.eclipse.jpt.jpa.core.jpa2.context.IdMapping2_0;
import org.eclipse.jpt.jpa.core.jpa2.context.DerivableIdMapping2_0;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.part.PageBook;


public class IdMapping2_0MappedByRelationshipPane<T extends IdMapping2_0>
	extends Pane<T>
{

	Label mappedByRelationshipLabel;

	public IdMapping2_0MappedByRelationshipPane(
			Pane<?> parentPane,
			PropertyValueModel<T> subjectHolder,
			Composite parent) {
		
		super(parentPane, subjectHolder, parent);
	}

	@Override
	protected void initializeLayout(Composite container) {
		PageBook pageBook = new PageBook(container, SWT.NULL);
		pageBook.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		this.mappedByRelationshipLabel = addLabel(pageBook, JptUiDetailsMessages2_0.IdMapping2_0MappedByRelationshipPane_label);

		new ControlSwitcher(buildDerivedModel(), buildPaneTransformer(), pageBook);
	}

	protected WritablePropertyValueModel<Boolean> buildDerivedModel() {
		return new PropertyAspectAdapter<T, Boolean>(getSubjectHolder(), DerivableIdMapping2_0.DERIVED_PROPERTY) {
			@Override
			protected Boolean buildValue_() {
				return Boolean.valueOf(this.subject.isDerived());
			}
		};
	}

	private Transformer<Boolean, Control> buildPaneTransformer() {
		return new Transformer<Boolean, Control>() {
			public Control transform(Boolean converter) {
				if (converter == null || converter == Boolean.FALSE) {
					return null;
				}
				return IdMapping2_0MappedByRelationshipPane.this.mappedByRelationshipLabel; 
			}
		};
	}
}