XtextProperties.java

/*******************************************************************************
 * Copyright (c) 2012 Michael Vorburger (http://www.vorburger.ch).
 * 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
 *******************************************************************************/

package ch.vorburger.xtext.databinding;

import org.eclipse.core.databinding.property.list.IListProperty;
import org.eclipse.core.databinding.property.value.IValueProperty;
import org.eclipse.emf.databinding.FeaturePath;
import org.eclipse.emf.databinding.IEMFValueProperty;
import org.eclipse.emf.ecore.EStructuralFeature;

import ch.vorburger.xtext.databinding.internal.XtextListProperty;
import ch.vorburger.xtext.databinding.internal.XtextListPropertyDecorator;
import ch.vorburger.xtext.databinding.internal.XtextValuePropertyDecorator;

/**
 * Like EMFProperties, but compatible with Xtext,
 * because it listens to changes on the Resource instead of on the contained EObjects 
 * (which doesn't work with Xtext as the Editor keeps recreating them).
 * 
 * Similar to EMFEditProperties, but based on observing an XTextDocument (IReadAccess<XtextResource>, IWriteAccess<XtextResource>) instead of an EditingDomain.
 *
 * @author Michael Vorburger
 */
public class XtextProperties {
	// TODO LOW It would be better if this class could share some code with EMFProperties..
	// That's not possible today because it's all static - but if one would change it...
	
	public static IEMFValueProperty value(EStructuralFeature feature) {
	    return value(FeaturePath.fromList(feature));
	}

	public static IXtextValueProperty value(FeaturePath featurePath) {
	    IValueProperty property;
	    property = new XtextValueProperty(featurePath.getFeaturePath()[0]);

	    IXtextValueProperty featureProperty = new XtextValuePropertyDecorator(property, featurePath.getFeaturePath()[0]);

	    for (int i = 1; i < featurePath.getFeaturePath().length; i++)
	    {
	      featureProperty = featureProperty.value(featurePath.getFeaturePath()[i]);
	    }

	    return featureProperty;
	}
	
	public static IXtextListProperty list(EStructuralFeature feature) {
		 IListProperty property = new XtextListProperty(feature);
		 return new XtextListPropertyDecorator(property, feature);
	}
	
	// TODO HIGH public static IXtextListProperty list(FeaturePath feature) {

	// TODO HIGH complete this by adding all variations just like in EMFProperties / EMFEditProperties, with multiple/Set/resource stuff etc.
}