bundles/core/org.eclipse.apogy.core.environment.earth.ui/src/org/eclipse/apogy/core/environment/earth/ui/utils/MultiEObjectsAdapter.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency 
 * 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:
 *     Pierre Allard - initial API and implementation
 *
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.core.environment.earth.ui.utils;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;

public class MultiEObjectsAdapter extends AdapterImpl {
	private final List<EObject> eObjects = new ArrayList<EObject>();

	@Override
	public void setTarget(Notifier newTarget) {
		super.setTarget(newTarget);

		if (newTarget instanceof EObject) {
			EObject eObject = (EObject) newTarget;
			if (!this.eObjects.contains(newTarget))
				this.eObjects.add(eObject);
		}
	}

	@Override
	public void unsetTarget(Notifier oldTarget) {
		super.unsetTarget(oldTarget);

		if (oldTarget instanceof EObject) {
			EObject eObject = (EObject) oldTarget;
			this.eObjects.remove(eObject);
		}

	}

	public void unregisterFromAllObjects() {
		List<EObject> tmpList = new ArrayList<EObject>();
		tmpList.addAll(this.eObjects);
		for (EObject eObject : tmpList) {
			eObject.eAdapters().remove(this);
		}
	}

	public void registerToEObject(EObject eObject) {
		if (!this.eObjects.contains(eObject)) {
			eObject.eAdapters().add(this);
			this.eObjects.add(eObject);
		}
	}

	public void unregisterFromEObject(EObject eObject) {
		eObject.eAdapters().remove(this);
		this.eObjects.remove(eObject);
	}

	public void dispose() {
		unregisterFromAllObjects();
	}
}