/*******************************************************************************
 * Copyright (c) 2007, 2010 BMW Car IT, Technische Universitaet Muenchen, 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:
 * BMW Car IT - Initial API and implementation
 * Technische Universitaet Muenchen - Major refactoring and extension
 *******************************************************************************/
package org.eclipse.emf.edapt.spi.history.impl;

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.emf.edapt.spi.history.HistoryPackage;
import org.eclipse.emf.edapt.spi.history.OperationChange;
import org.eclipse.emf.edapt.spi.history.OperationInstance;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Operation Change</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 * <li>{@link org.eclipse.emf.edapt.spi.history.impl.OperationChangeImpl#getOperation <em>Operation</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public class OperationChangeImpl extends CompositeChangeImpl implements OperationChange {
	/**
	 * The cached value of the '{@link #getOperation() <em>Operation</em>}' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 *
	 * @see #getOperation()
	 * @generated
	 * @ordered
	 */
	protected OperationInstance operation;

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

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

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 *
	 * @generated
	 */
	@Override
	public OperationInstance getOperation() {
		return operation;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 *
	 * @generated
	 */
	public NotificationChain basicSetOperation(OperationInstance newOperation, NotificationChain msgs) {
		final OperationInstance oldOperation = operation;
		operation = newOperation;
		if (eNotificationRequired()) {
			final ENotificationImpl notification = new ENotificationImpl(this, Notification.SET,
				HistoryPackage.OPERATION_CHANGE__OPERATION, oldOperation, newOperation);
			if (msgs == null) {
				msgs = notification;
			} else {
				msgs.add(notification);
			}
		}
		return msgs;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 *
	 * @generated
	 */
	@Override
	public void setOperation(OperationInstance newOperation) {
		if (newOperation != operation) {
			NotificationChain msgs = null;
			if (operation != null) {
				msgs = ((InternalEObject) operation).eInverseRemove(this, EOPPOSITE_FEATURE_BASE
					- HistoryPackage.OPERATION_CHANGE__OPERATION, null, msgs);
			}
			if (newOperation != null) {
				msgs = ((InternalEObject) newOperation).eInverseAdd(this, EOPPOSITE_FEATURE_BASE
					- HistoryPackage.OPERATION_CHANGE__OPERATION, null, msgs);
			}
			msgs = basicSetOperation(newOperation, msgs);
			if (msgs != null) {
				msgs.dispatch();
			}
		}
		else if (eNotificationRequired()) {
			eNotify(new ENotificationImpl(this, Notification.SET, HistoryPackage.OPERATION_CHANGE__OPERATION,
				newOperation, newOperation));
		}
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 *
	 * @generated
	 */
	@Override
	public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, NotificationChain msgs) {
		switch (featureID) {
		case HistoryPackage.OPERATION_CHANGE__OPERATION:
			return basicSetOperation(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 HistoryPackage.OPERATION_CHANGE__OPERATION:
			return getOperation();
		}
		return super.eGet(featureID, resolve, coreType);
	}

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

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 *
	 * @generated
	 */
	@Override
	public void eUnset(int featureID) {
		switch (featureID) {
		case HistoryPackage.OPERATION_CHANGE__OPERATION:
			setOperation((OperationInstance) null);
			return;
		}
		super.eUnset(featureID);
	}

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

} // OperationChangeImpl