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

/*******************************************************************************
 * Copyright (c) 2008 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.ecore.EClass;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.stem.core.graph.Graph;
import org.eclipse.stem.core.model.STEMTime;
import org.eclipse.stem.core.predicate.Predicate;
import org.eclipse.stem.core.predicate.PredicatePackage;
import org.eclipse.stem.core.predicate.PredicateReference;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Reference</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 *   <li>{@link org.eclipse.stem.core.predicate.impl.PredicateReferenceImpl#getPredicate <em>Predicate</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public class PredicateReferenceImpl extends PredicateImpl implements PredicateReference {
	/**
	 * The cached value of the '{@link #getPredicate() <em>Predicate</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getPredicate()
	 * @generated
	 * @ordered
	 */
	protected Predicate predicate;

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

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

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Predicate getPredicate() {
		if (predicate != null && predicate.eIsProxy()) {
			InternalEObject oldPredicate = (InternalEObject)predicate;
			predicate = (Predicate)eResolveProxy(oldPredicate);
			if (predicate != oldPredicate) {
				if (eNotificationRequired())
					eNotify(new ENotificationImpl(this, Notification.RESOLVE, PredicatePackage.PREDICATE_REFERENCE__PREDICATE, oldPredicate, predicate));
			}
		}
		return predicate;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Predicate basicGetPredicate() {
		return predicate;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setPredicate(Predicate newPredicate) {
		Predicate oldPredicate = predicate;
		predicate = newPredicate;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, PredicatePackage.PREDICATE_REFERENCE__PREDICATE, oldPredicate, predicate));
	}

	
	/**
	 * @see org.eclipse.stem.core.predicate.impl.PredicateImpl#evaluate(org.eclipse.stem.core.model.STEMTime, long, org.eclipse.stem.core.model.Decorator)
	 */
	@Override
	public boolean evaluate(STEMTime time, long timerPeriod, Graph graph) {
		return getPredicate().evaluate(time, timerPeriod,  graph);
	} // evaluate
	
	

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

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

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void eUnset(int featureID) {
		switch (featureID) {
			case PredicatePackage.PREDICATE_REFERENCE__PREDICATE:
				setPredicate((Predicate)null);
				return;
		}
		super.eUnset(featureID);
	}

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

} //PredicateReferenceImpl