package org.eclipse.stem.core.graph.impl;

/*******************************************************************************
 * Copyright (c) 2007 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.stem.core.common.Identifiable;
import org.eclipse.stem.core.graph.GraphPackage;
import org.eclipse.stem.core.graph.Node;
import org.eclipse.stem.core.graph.NodeLabel;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Node Label</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 *   <li>{@link org.eclipse.stem.core.graph.impl.NodeLabelImpl#getNode <em>Node</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public abstract class NodeLabelImpl extends LabelImpl implements NodeLabel {
	/**
	 * The cached value of the '{@link #getNode() <em>Node</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getNode()
	 * @generated
	 * @ordered
	 */
	protected Node node;

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected NodeLabelImpl() {
		super();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	protected EClass eStaticClass() {
		return GraphPackage.Literals.NODE_LABEL;
	}

	@Override
	public Identifiable getIdentifiable() {
		return getNode();
	}

	@Override
	public void setIdentifiable(Identifiable newIdentifiable) {
		setNode((Node)newIdentifiable);		
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Node getNode() {
		if (node != null && node.eIsProxy()) {
			InternalEObject oldNode = (InternalEObject)node;
			node = (Node)eResolveProxy(oldNode);
			if (node != oldNode) {
				if (eNotificationRequired())
					eNotify(new ENotificationImpl(this, Notification.RESOLVE, GraphPackage.NODE_LABEL__NODE, oldNode, node));
			}
		}
		return node;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Node basicGetNode() {
		return node;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetNode(Node newNode, NotificationChain msgs) {
		Node oldNode = node;
		node = newNode;
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, GraphPackage.NODE_LABEL__NODE, oldNode, newNode);
			if (msgs == null) msgs = notification; else msgs.add(notification);
		}
		return msgs;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setNode(Node newNode) {
		if (newNode != node) {
			NotificationChain msgs = null;
			if (node != null)
				msgs = ((InternalEObject)node).eInverseRemove(this, GraphPackage.NODE__LABELS, Node.class, msgs);
			if (newNode != null)
				msgs = ((InternalEObject)newNode).eInverseAdd(this, GraphPackage.NODE__LABELS, Node.class, msgs);
			msgs = basicSetNode(newNode, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, GraphPackage.NODE_LABEL__NODE, newNode, newNode));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public NotificationChain eInverseAdd(InternalEObject otherEnd, int featureID, NotificationChain msgs) {
		switch (featureID) {
			case GraphPackage.NODE_LABEL__NODE:
				if (node != null)
					msgs = ((InternalEObject)node).eInverseRemove(this, GraphPackage.NODE__LABELS, Node.class, msgs);
				return basicSetNode((Node)otherEnd, msgs);
		}
		return super.eInverseAdd(otherEnd, featureID, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, NotificationChain msgs) {
		switch (featureID) {
			case GraphPackage.NODE_LABEL__NODE:
				return basicSetNode(null, msgs);
		}
		return super.eInverseRemove(otherEnd, featureID, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public Object eGet(int featureID, boolean resolve, boolean coreType) {
		switch (featureID) {
			case GraphPackage.NODE_LABEL__NODE:
				if (resolve) return getNode();
				return basicGetNode();
		}
		return super.eGet(featureID, resolve, coreType);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void eSet(int featureID, Object newValue) {
		switch (featureID) {
			case GraphPackage.NODE_LABEL__NODE:
				setNode((Node)newValue);
				return;
		}
		super.eSet(featureID, newValue);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void eUnset(int featureID) {
		switch (featureID) {
			case GraphPackage.NODE_LABEL__NODE:
				setNode((Node)null);
				return;
		}
		super.eUnset(featureID);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public boolean eIsSet(int featureID) {
		switch (featureID) {
			case GraphPackage.NODE_LABEL__NODE:
				return node != null;
		}
		return super.eIsSet(featureID);
	}

	@Override
	public boolean sane() {
		boolean retValue = super.sane();

		retValue = retValue
				&& (getNode() == null || getNode().equals(getIdentifiable()));
		assert retValue;

		return retValue;
	} // sane
	
} //NodeLabelImpl