plugins/org.eclipse.egf.model/src/org/eclipse/egf/model/pattern/adapter/SubstitutionAdapter.java

/**
 *  Copyright (c) 2009-2010 Thales Corporate Services S.A.S.
 *  This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v2.0
 *  which accompanies this distribution, and is available at
 *  https://www.eclipse.org/legal/epl-v2.0
 *
 *  SPDX-License-Identifier: EPL-2.0
 * 
 *  Contributors:
 *      Thales Corporate Services S.A.S - initial API and implementation
 * 
 */
package org.eclipse.egf.model.pattern.adapter;

import org.eclipse.egf.model.fcore.FcorePackage;
import org.eclipse.egf.model.pattern.Pattern;
import org.eclipse.egf.model.pattern.PatternPackage;
import org.eclipse.egf.model.pattern.Substitution;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.emf.ecore.util.EcoreUtil;

/**
 * @author Xavier Maysonnave
 * 
 */
public class SubstitutionAdapter extends AdapterImpl {

    private EObject _root;

    private Substitution _substitution;

    private EStructuralFeature _nameFeature = FcorePackage.Literals.NAMED_MODEL_ELEMENT__NAME;

    private EStructuralFeature _substitutionReplacedElementFeature = PatternPackage.Literals.SUBSTITUTION__REPLACED_ELEMENT;

    private AdapterImpl _nameAdapter = new AdapterImpl() {

        @Override
        public void notifyChanged(Notification msg) {
            if (msg.getEventType() == Notification.SET && msg.getFeature().equals(_nameFeature)) {
                _substitution.eNotify(new ENotificationImpl((InternalEObject) _substitution, -1, _substitutionReplacedElementFeature, null, null) {

                    @Override
                    public boolean isTouch() {
                        return true;
                    }

                });
            }
        }
    };

    public SubstitutionAdapter(Substitution substitution) {
        super();
        _substitution = substitution;
        _substitution.eAdapters().add(this);
    }

    @Override
    public void notifyChanged(Notification notification) {
        if (notification.getFeature() == null || notification.getFeature().equals(_substitutionReplacedElementFeature)) {
            switch (notification.getEventType()) {
                case Notification.SET:
                case Notification.RESOLVE:
                    EObject newValue = EcoreUtil.getRootContainer((Pattern) notification.getNewValue(), true);
                    EObject oldValue = EcoreUtil.getRootContainer((Pattern) notification.getOldValue(), true);
                    if (oldValue != null && oldValue != notification.getOldValue()) {
                        oldValue.eAdapters().remove(_nameAdapter);
                    }
                    if (newValue != null && newValue != notification.getNewValue() && newValue.eAdapters().contains(_nameAdapter) == false) {
                        newValue.eAdapters().add(_nameAdapter);
                        _root = newValue;
                    }
                    break;
                case Notification.REMOVING_ADAPTER:
                    if (_root != null) {
                        _root.eAdapters().remove(_nameAdapter);
                    }
                    break;
                default:
                    return; // No notification
            }
        }
    }

}