AbstractEcoreXMLPropertySection.java

/**
 * Copyright 2010 The University of North Carolina at Chapel Hill
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package unc.lib.cdr.workbench.views;

import java.io.IOException;
import java.io.StringWriter;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.xmi.XMLResource;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.views.properties.tabbed.AbstractPropertySection;
import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage;

public abstract class AbstractEcoreXMLPropertySection extends AbstractPropertySection {

	private ISelection input = null;
	private Text labelText;

	/**
	 * @see org.eclipse.ui.views.properties.tabbed.ISection#createControls(org.eclipse.swt.widgets.Composite,
	 *      org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage)
	 */
	@Override
	public void createControls(Composite parent, final TabbedPropertySheetPage atabbedPropertySheetPage) {
		super.createControls(parent, atabbedPropertySheetPage);
		Composite composite = getWidgetFactory().createFlatFormComposite(parent);
		labelText = getWidgetFactory().createText(composite, "", SWT.MULTI | SWT.READ_ONLY | SWT.WRAP);
		FormData data = new FormData();
		data.left = new FormAttachment(0, 0);
		data.right = new FormAttachment(100, 0);
		data.top = new FormAttachment(0, 0);
		data.bottom = new FormAttachment(100, 0);
		labelText.setLayoutData(data);
	}

	/**
	 * @see org.eclipse.ui.views.properties.tabbed.ISection#setInput(org.eclipse.ui.IWorkbenchPart,
	 *      org.eclipse.jface.viewers.ISelection)
	 */
	@Override
	public void setInput(IWorkbenchPart part, ISelection s) {
		super.setInput(part, s);
		this.input = s;
	}

	ISelection getInput() {
		return this.input;
	}

	/**
	 * @see org.eclipse.ui.views.properties.tabbed.ISection#refresh()
	 */
	@Override
	public void refresh() {
		EObject o = getXMLEObject();
		StringWriter sw = new StringWriter();
		Map<Object, Object> options = new HashMap<Object, Object>();
		options.put(XMLResource.OPTION_ENCODING, "utf-8");
		options.put(XMLResource.OPTION_LINE_WIDTH, new Integer(80));
		options.put(XMLResource.OPTION_ROOT_OBJECTS, Collections.singletonList(o));
		try {
			((XMLResource) o.eResource()).save(sw, options);
		} catch (IOException e) {
			sw.append("failed to serialize XML for model object");
		}
		labelText.setText(sw.toString());
	}

	abstract EObject getXMLEObject();

	/**
	 * @see org.eclipse.ui.views.properties.tabbed.ISection#shouldUseExtraSpace()
	 */
	@Override
	public boolean shouldUseExtraSpace() {
		return true;
	}

}