/*
 * Copyright (c) 2005, 2006 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 - initial API and implementation
 *
 * $Id: ExtendImpl.java,v 1.14 2006/03/01 17:56:38 khussey Exp $
 */
package org.eclipse.uml2.uml.internal.impl;

import java.util.Collection;
import java.util.Iterator;
import java.util.Map;

import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;

import org.eclipse.emf.common.util.DiagnosticChain;

import org.eclipse.emf.common.util.EList;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.InternalEObject;

import org.eclipse.emf.ecore.impl.ENotificationImpl;

import org.eclipse.emf.ecore.util.EObjectResolvingEList;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.ecore.util.InternalEList;

import org.eclipse.uml2.common.util.DerivedUnionEObjectEList;

import org.eclipse.uml2.uml.Constraint;
import org.eclipse.uml2.uml.DirectedRelationship;
import org.eclipse.uml2.uml.Element;
import org.eclipse.uml2.uml.Extend;
import org.eclipse.uml2.uml.ExtensionPoint;
import org.eclipse.uml2.uml.Relationship;
import org.eclipse.uml2.uml.StringExpression;
import org.eclipse.uml2.uml.UMLFactory;
import org.eclipse.uml2.uml.UMLPackage;
import org.eclipse.uml2.uml.UseCase;
import org.eclipse.uml2.uml.VisibilityKind;

import org.eclipse.uml2.uml.internal.operations.ExtendOperations;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Extend</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 *   <li>{@link org.eclipse.uml2.uml.internal.impl.ExtendImpl#getRelatedElements <em>Related Element</em>}</li>
 *   <li>{@link org.eclipse.uml2.uml.internal.impl.ExtendImpl#getSources <em>Source</em>}</li>
 *   <li>{@link org.eclipse.uml2.uml.internal.impl.ExtendImpl#getTargets <em>Target</em>}</li>
 *   <li>{@link org.eclipse.uml2.uml.internal.impl.ExtendImpl#getOwnedElements <em>Owned Element</em>}</li>
 *   <li>{@link org.eclipse.uml2.uml.internal.impl.ExtendImpl#getExtendedCase <em>Extended Case</em>}</li>
 *   <li>{@link org.eclipse.uml2.uml.internal.impl.ExtendImpl#getCondition <em>Condition</em>}</li>
 *   <li>{@link org.eclipse.uml2.uml.internal.impl.ExtendImpl#getExtensionLocations <em>Extension Location</em>}</li>
 *   <li>{@link org.eclipse.uml2.uml.internal.impl.ExtendImpl#getExtension <em>Extension</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public class ExtendImpl
		extends NamedElementImpl
		implements Extend {

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

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

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public EList getRelatedElements() {
		EList relatedElement = (EList) eVirtualGet(UMLPackage.EXTEND__RELATED_ELEMENT);
		if (relatedElement == null) {
			eVirtualSet(UMLPackage.EXTEND__RELATED_ELEMENT,
				relatedElement = new DerivedUnionEObjectEList(Element.class,
					this, UMLPackage.EXTEND__RELATED_ELEMENT, new int[]{
						UMLPackage.EXTEND__SOURCE, UMLPackage.EXTEND__TARGET}));
		}
		return relatedElement;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public EList getSources() {
		EList source = (EList) eVirtualGet(UMLPackage.EXTEND__SOURCE);
		if (source == null) {
			eVirtualSet(UMLPackage.EXTEND__SOURCE,
				source = new DerivedUnionEObjectEList(Element.class, this,
					UMLPackage.EXTEND__SOURCE,
					new int[]{UMLPackage.EXTEND__EXTENSION}));
		}
		return source;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public EList getTargets() {
		EList target = (EList) eVirtualGet(UMLPackage.EXTEND__TARGET);
		if (target == null) {
			eVirtualSet(UMLPackage.EXTEND__TARGET,
				target = new DerivedUnionEObjectEList(Element.class, this,
					UMLPackage.EXTEND__TARGET,
					new int[]{UMLPackage.EXTEND__EXTENDED_CASE}));
		}
		return target;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public EList getOwnedElements() {
		EList ownedElement = (EList) eVirtualGet(UMLPackage.EXTEND__OWNED_ELEMENT);
		if (ownedElement == null) {
			eVirtualSet(UMLPackage.EXTEND__OWNED_ELEMENT,
				ownedElement = new DerivedUnionEObjectEList(Element.class,
					this, UMLPackage.EXTEND__OWNED_ELEMENT, new int[]{
						UMLPackage.EXTEND__OWNED_COMMENT,
						UMLPackage.EXTEND__NAME_EXPRESSION,
						UMLPackage.EXTEND__CONDITION}));
		}
		return ownedElement;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public UseCase getExtendedCase() {
		UseCase extendedCase = (UseCase) eVirtualGet(UMLPackage.EXTEND__EXTENDED_CASE);
		if (extendedCase != null && extendedCase.eIsProxy()) {
			InternalEObject oldExtendedCase = (InternalEObject) extendedCase;
			extendedCase = (UseCase) eResolveProxy(oldExtendedCase);
			if (extendedCase != oldExtendedCase) {
				eVirtualSet(UMLPackage.EXTEND__EXTENDED_CASE, extendedCase);
				if (eNotificationRequired())
					eNotify(new ENotificationImpl(this, Notification.RESOLVE,
						UMLPackage.EXTEND__EXTENDED_CASE, oldExtendedCase,
						extendedCase));
			}
		}
		return extendedCase;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public UseCase basicGetExtendedCase() {
		return (UseCase) eVirtualGet(UMLPackage.EXTEND__EXTENDED_CASE);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setExtendedCase(UseCase newExtendedCase) {
		UseCase extendedCase = newExtendedCase;
		Object oldExtendedCase = eVirtualSet(UMLPackage.EXTEND__EXTENDED_CASE,
			extendedCase);
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET,
				UMLPackage.EXTEND__EXTENDED_CASE,
				oldExtendedCase == EVIRTUAL_NO_VALUE
					? null
					: oldExtendedCase, extendedCase));

	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Constraint getCondition() {
		Constraint condition = (Constraint) eVirtualGet(UMLPackage.EXTEND__CONDITION);
		if (condition != null && condition.eIsProxy()) {
			InternalEObject oldCondition = (InternalEObject) condition;
			condition = (Constraint) eResolveProxy(oldCondition);
			if (condition != oldCondition) {
				InternalEObject newCondition = (InternalEObject) condition;
				NotificationChain msgs = oldCondition.eInverseRemove(this,
					EOPPOSITE_FEATURE_BASE - UMLPackage.EXTEND__CONDITION,
					null, null);
				if (newCondition.eInternalContainer() == null) {
					msgs = newCondition.eInverseAdd(this,
						EOPPOSITE_FEATURE_BASE - UMLPackage.EXTEND__CONDITION,
						null, msgs);
				}
				if (msgs != null)
					msgs.dispatch();
				if (eNotificationRequired())
					eNotify(new ENotificationImpl(this, Notification.RESOLVE,
						UMLPackage.EXTEND__CONDITION, oldCondition, condition));
			}
		}
		return condition;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Constraint basicGetCondition() {
		return (Constraint) eVirtualGet(UMLPackage.EXTEND__CONDITION);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetCondition(Constraint newCondition,
			NotificationChain msgs) {
		Object oldCondition = eVirtualSet(UMLPackage.EXTEND__CONDITION,
			newCondition);
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this,
				Notification.SET, UMLPackage.EXTEND__CONDITION,
				oldCondition == EVIRTUAL_NO_VALUE
					? null
					: oldCondition, newCondition);
			if (msgs == null)
				msgs = notification;
			else
				msgs.add(notification);
		}

		return msgs;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setCondition(Constraint newCondition) {
		Constraint condition = (Constraint) eVirtualGet(UMLPackage.EXTEND__CONDITION);
		if (newCondition != condition) {
			NotificationChain msgs = null;
			if (condition != null)
				msgs = ((InternalEObject) condition).eInverseRemove(this,
					EOPPOSITE_FEATURE_BASE - UMLPackage.EXTEND__CONDITION,
					null, msgs);
			if (newCondition != null)
				msgs = ((InternalEObject) newCondition).eInverseAdd(this,
					EOPPOSITE_FEATURE_BASE - UMLPackage.EXTEND__CONDITION,
					null, msgs);
			msgs = basicSetCondition(newCondition, msgs);
			if (msgs != null)
				msgs.dispatch();
		} else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET,
				UMLPackage.EXTEND__CONDITION, newCondition, newCondition));

	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Constraint createCondition(String name, EClass eClass) {
		Constraint newCondition = (Constraint) EcoreUtil.create(eClass);
		if (name != null)
			newCondition.setName(name);
		setCondition(newCondition);
		return newCondition;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Constraint createCondition(String name) {
		Constraint newCondition = UMLFactory.eINSTANCE.createConstraint();
		if (name != null)
			newCondition.setName(name);
		setCondition(newCondition);
		return newCondition;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public EList getExtensionLocations() {
		EList extensionLocation = (EList) eVirtualGet(UMLPackage.EXTEND__EXTENSION_LOCATION);
		if (extensionLocation == null) {
			eVirtualSet(UMLPackage.EXTEND__EXTENSION_LOCATION,
				extensionLocation = new EObjectResolvingEList(
					ExtensionPoint.class, this,
					UMLPackage.EXTEND__EXTENSION_LOCATION));
		}
		return extensionLocation;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public ExtensionPoint getExtensionLocation(String name) {
		return getExtensionLocation(name, false);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public ExtensionPoint getExtensionLocation(String name, boolean ignoreCase) {
		extensionLocationLoop : for (Iterator i = getExtensionLocations()
			.iterator(); i.hasNext();) {
			ExtensionPoint extensionLocation = (ExtensionPoint) i.next();
			if (name != null && !(ignoreCase
				? name.equalsIgnoreCase(extensionLocation.getName())
				: name.equals(extensionLocation.getName())))
				continue extensionLocationLoop;
			return extensionLocation;
		}
		return null;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public UseCase getExtension() {
		if (eContainerFeatureID != UMLPackage.EXTEND__EXTENSION)
			return null;
		return (UseCase) eContainer();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetExtension(UseCase newExtension,
			NotificationChain msgs) {
		msgs = eBasicSetContainer((InternalEObject) newExtension,
			UMLPackage.EXTEND__EXTENSION, msgs);

		return msgs;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setExtension(UseCase newExtension) {
		if (newExtension != eInternalContainer()
			|| (eContainerFeatureID != UMLPackage.EXTEND__EXTENSION && newExtension != null)) {
			if (EcoreUtil.isAncestor(this, newExtension))
				throw new IllegalArgumentException(
					"Recursive containment not allowed for " + toString()); //$NON-NLS-1$
			NotificationChain msgs = null;
			if (eInternalContainer() != null)
				msgs = eBasicRemoveFromContainer(msgs);
			if (newExtension != null)
				msgs = ((InternalEObject) newExtension).eInverseAdd(this,
					UMLPackage.USE_CASE__EXTEND, UseCase.class, msgs);
			msgs = basicSetExtension(newExtension, msgs);
			if (msgs != null)
				msgs.dispatch();
		} else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET,
				UMLPackage.EXTEND__EXTENSION, newExtension, newExtension));

	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean validateExtensionPoints(DiagnosticChain diagnostics,
			Map context) {
		return ExtendOperations.validateExtensionPoints(this, diagnostics,
			context);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain eInverseAdd(InternalEObject otherEnd,
			int featureID, NotificationChain msgs) {
		switch (featureID) {
			case UMLPackage.EXTEND__EANNOTATIONS :
				return ((InternalEList) getEAnnotations()).basicAdd(otherEnd,
					msgs);
			case UMLPackage.EXTEND__CLIENT_DEPENDENCY :
				return ((InternalEList) getClientDependencies()).basicAdd(
					otherEnd, msgs);
			case UMLPackage.EXTEND__EXTENSION :
				if (eInternalContainer() != null)
					msgs = eBasicRemoveFromContainer(msgs);
				return basicSetExtension((UseCase) otherEnd, msgs);
		}
		return eDynamicInverseAdd(otherEnd, featureID, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain eInverseRemove(InternalEObject otherEnd,
			int featureID, NotificationChain msgs) {
		switch (featureID) {
			case UMLPackage.EXTEND__EANNOTATIONS :
				return ((InternalEList) getEAnnotations()).basicRemove(
					otherEnd, msgs);
			case UMLPackage.EXTEND__OWNED_COMMENT :
				return ((InternalEList) getOwnedComments()).basicRemove(
					otherEnd, msgs);
			case UMLPackage.EXTEND__CLIENT_DEPENDENCY :
				return ((InternalEList) getClientDependencies()).basicRemove(
					otherEnd, msgs);
			case UMLPackage.EXTEND__NAME_EXPRESSION :
				return basicSetNameExpression(null, msgs);
			case UMLPackage.EXTEND__CONDITION :
				return basicSetCondition(null, msgs);
			case UMLPackage.EXTEND__EXTENSION :
				return basicSetExtension(null, msgs);
		}
		return eDynamicInverseRemove(otherEnd, featureID, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain eBasicRemoveFromContainerFeature(
			NotificationChain msgs) {
		switch (eContainerFeatureID) {
			case UMLPackage.EXTEND__EXTENSION :
				return eInternalContainer().eInverseRemove(this,
					UMLPackage.USE_CASE__EXTEND, UseCase.class, msgs);
		}
		return eDynamicBasicRemoveFromContainer(msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Object eGet(int featureID, boolean resolve, boolean coreType) {
		switch (featureID) {
			case UMLPackage.EXTEND__EANNOTATIONS :
				return getEAnnotations();
			case UMLPackage.EXTEND__OWNED_ELEMENT :
				return getOwnedElements();
			case UMLPackage.EXTEND__OWNER :
				if (resolve)
					return getOwner();
				return basicGetOwner();
			case UMLPackage.EXTEND__OWNED_COMMENT :
				return getOwnedComments();
			case UMLPackage.EXTEND__NAME :
				return getName();
			case UMLPackage.EXTEND__VISIBILITY :
				return getVisibility();
			case UMLPackage.EXTEND__QUALIFIED_NAME :
				return getQualifiedName();
			case UMLPackage.EXTEND__CLIENT_DEPENDENCY :
				return getClientDependencies();
			case UMLPackage.EXTEND__NAMESPACE :
				if (resolve)
					return getNamespace();
				return basicGetNamespace();
			case UMLPackage.EXTEND__NAME_EXPRESSION :
				if (resolve)
					return getNameExpression();
				return basicGetNameExpression();
			case UMLPackage.EXTEND__RELATED_ELEMENT :
				return getRelatedElements();
			case UMLPackage.EXTEND__SOURCE :
				return getSources();
			case UMLPackage.EXTEND__TARGET :
				return getTargets();
			case UMLPackage.EXTEND__EXTENDED_CASE :
				if (resolve)
					return getExtendedCase();
				return basicGetExtendedCase();
			case UMLPackage.EXTEND__CONDITION :
				if (resolve)
					return getCondition();
				return basicGetCondition();
			case UMLPackage.EXTEND__EXTENSION_LOCATION :
				return getExtensionLocations();
			case UMLPackage.EXTEND__EXTENSION :
				return getExtension();
		}
		return eDynamicGet(featureID, resolve, coreType);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void eSet(int featureID, Object newValue) {
		switch (featureID) {
			case UMLPackage.EXTEND__EANNOTATIONS :
				getEAnnotations().clear();
				getEAnnotations().addAll((Collection) newValue);
				return;
			case UMLPackage.EXTEND__OWNED_COMMENT :
				getOwnedComments().clear();
				getOwnedComments().addAll((Collection) newValue);
				return;
			case UMLPackage.EXTEND__NAME :
				setName((String) newValue);
				return;
			case UMLPackage.EXTEND__VISIBILITY :
				setVisibility((VisibilityKind) newValue);
				return;
			case UMLPackage.EXTEND__CLIENT_DEPENDENCY :
				getClientDependencies().clear();
				getClientDependencies().addAll((Collection) newValue);
				return;
			case UMLPackage.EXTEND__NAME_EXPRESSION :
				setNameExpression((StringExpression) newValue);
				return;
			case UMLPackage.EXTEND__EXTENDED_CASE :
				setExtendedCase((UseCase) newValue);
				return;
			case UMLPackage.EXTEND__CONDITION :
				setCondition((Constraint) newValue);
				return;
			case UMLPackage.EXTEND__EXTENSION_LOCATION :
				getExtensionLocations().clear();
				getExtensionLocations().addAll((Collection) newValue);
				return;
			case UMLPackage.EXTEND__EXTENSION :
				setExtension((UseCase) newValue);
				return;
		}
		eDynamicSet(featureID, newValue);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void eUnset(int featureID) {
		switch (featureID) {
			case UMLPackage.EXTEND__EANNOTATIONS :
				getEAnnotations().clear();
				return;
			case UMLPackage.EXTEND__OWNED_COMMENT :
				getOwnedComments().clear();
				return;
			case UMLPackage.EXTEND__NAME :
				unsetName();
				return;
			case UMLPackage.EXTEND__VISIBILITY :
				unsetVisibility();
				return;
			case UMLPackage.EXTEND__CLIENT_DEPENDENCY :
				getClientDependencies().clear();
				return;
			case UMLPackage.EXTEND__NAME_EXPRESSION :
				setNameExpression((StringExpression) null);
				return;
			case UMLPackage.EXTEND__EXTENDED_CASE :
				setExtendedCase((UseCase) null);
				return;
			case UMLPackage.EXTEND__CONDITION :
				setCondition((Constraint) null);
				return;
			case UMLPackage.EXTEND__EXTENSION_LOCATION :
				getExtensionLocations().clear();
				return;
			case UMLPackage.EXTEND__EXTENSION :
				setExtension((UseCase) null);
				return;
		}
		eDynamicUnset(featureID);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean eIsSet(int featureID) {
		switch (featureID) {
			case UMLPackage.EXTEND__EANNOTATIONS :
				EList eAnnotations = (EList) eVirtualGet(UMLPackage.EXTEND__EANNOTATIONS);
				return eAnnotations != null && !eAnnotations.isEmpty();
			case UMLPackage.EXTEND__OWNED_ELEMENT :
				return isSetOwnedElements();
			case UMLPackage.EXTEND__OWNER :
				return isSetOwner();
			case UMLPackage.EXTEND__OWNED_COMMENT :
				EList ownedComment = (EList) eVirtualGet(UMLPackage.EXTEND__OWNED_COMMENT);
				return ownedComment != null && !ownedComment.isEmpty();
			case UMLPackage.EXTEND__NAME :
				return isSetName();
			case UMLPackage.EXTEND__VISIBILITY :
				return isSetVisibility();
			case UMLPackage.EXTEND__QUALIFIED_NAME :
				return QUALIFIED_NAME_EDEFAULT == null
					? getQualifiedName() != null
					: !QUALIFIED_NAME_EDEFAULT.equals(getQualifiedName());
			case UMLPackage.EXTEND__CLIENT_DEPENDENCY :
				EList clientDependency = (EList) eVirtualGet(UMLPackage.EXTEND__CLIENT_DEPENDENCY);
				return clientDependency != null && !clientDependency.isEmpty();
			case UMLPackage.EXTEND__NAMESPACE :
				return isSetNamespace();
			case UMLPackage.EXTEND__NAME_EXPRESSION :
				return eVirtualGet(UMLPackage.EXTEND__NAME_EXPRESSION) != null;
			case UMLPackage.EXTEND__RELATED_ELEMENT :
				return isSetRelatedElements();
			case UMLPackage.EXTEND__SOURCE :
				return isSetSources();
			case UMLPackage.EXTEND__TARGET :
				return isSetTargets();
			case UMLPackage.EXTEND__EXTENDED_CASE :
				return eVirtualGet(UMLPackage.EXTEND__EXTENDED_CASE) != null;
			case UMLPackage.EXTEND__CONDITION :
				return eVirtualGet(UMLPackage.EXTEND__CONDITION) != null;
			case UMLPackage.EXTEND__EXTENSION_LOCATION :
				EList extensionLocation = (EList) eVirtualGet(UMLPackage.EXTEND__EXTENSION_LOCATION);
				return extensionLocation != null
					&& !extensionLocation.isEmpty();
			case UMLPackage.EXTEND__EXTENSION :
				return getExtension() != null;
		}
		return eDynamicIsSet(featureID);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public int eBaseStructuralFeatureID(int derivedFeatureID, Class baseClass) {
		if (baseClass == Relationship.class) {
			switch (derivedFeatureID) {
				case UMLPackage.EXTEND__RELATED_ELEMENT :
					return UMLPackage.RELATIONSHIP__RELATED_ELEMENT;
				default :
					return -1;
			}
		}
		if (baseClass == DirectedRelationship.class) {
			switch (derivedFeatureID) {
				case UMLPackage.EXTEND__SOURCE :
					return UMLPackage.DIRECTED_RELATIONSHIP__SOURCE;
				case UMLPackage.EXTEND__TARGET :
					return UMLPackage.DIRECTED_RELATIONSHIP__TARGET;
				default :
					return -1;
			}
		}
		return super.eBaseStructuralFeatureID(derivedFeatureID, baseClass);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public int eDerivedStructuralFeatureID(int baseFeatureID, Class baseClass) {
		if (baseClass == Relationship.class) {
			switch (baseFeatureID) {
				case UMLPackage.RELATIONSHIP__RELATED_ELEMENT :
					return UMLPackage.EXTEND__RELATED_ELEMENT;
				default :
					return -1;
			}
		}
		if (baseClass == DirectedRelationship.class) {
			switch (baseFeatureID) {
				case UMLPackage.DIRECTED_RELATIONSHIP__SOURCE :
					return UMLPackage.EXTEND__SOURCE;
				case UMLPackage.DIRECTED_RELATIONSHIP__TARGET :
					return UMLPackage.EXTEND__TARGET;
				default :
					return -1;
			}
		}
		return super.eDerivedStructuralFeatureID(baseFeatureID, baseClass);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean isSetRelatedElements() {
		return isSetSources() || isSetTargets();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean isSetSources() {
		return eIsSet(UMLPackage.EXTEND__EXTENSION);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean isSetTargets() {
		return eIsSet(UMLPackage.EXTEND__EXTENDED_CASE);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean isSetOwnedElements() {
		return super.isSetOwnedElements()
			|| eIsSet(UMLPackage.EXTEND__CONDITION);
	}

} //ExtendImpl