/*
 * Copyright (c) 2003, 2004 IBM Corporation and others.
 * All rights reserved.   This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 *
 * Contributors:
 *   IBM - Initial API and implementation
 *
 * $Id: ExtensionImpl.java,v 1.4 2004/04/27 16:38:54 khussey Exp $
 */
package org.eclipse.uml2.impl;

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

import org.eclipse.emf.common.notify.NotificationChain;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.util.InternalEList;
import org.eclipse.uml2.CollaborationOccurrence;
import org.eclipse.uml2.Extension;
import org.eclipse.uml2.ExtensionEnd;
import org.eclipse.uml2.Property;
import org.eclipse.uml2.StringExpression;
import org.eclipse.uml2.TemplateParameter;
import org.eclipse.uml2.TemplateSignature;
import org.eclipse.uml2.UML2Package;
import org.eclipse.uml2.VisibilityKind;
import org.eclipse.uml2.internal.util.SubsetEObjectContainmentWithInverseEList;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Extension</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 *   <li>{@link org.eclipse.uml2.impl.ExtensionImpl#isRequired <em>Is Required</em>}</li>
 *   <li>{@link org.eclipse.uml2.impl.ExtensionImpl#getMetaclass <em>Metaclass</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public class ExtensionImpl extends AssociationImpl implements Extension {
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public static final String copyright = "Copyright (c) 2003, 2004 IBM Corporation and others."; //$NON-NLS-1$

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

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected EClass eStaticClass() {
		return UML2Package.eINSTANCE.getExtension();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * Returns the derived value of the '<em><b>Is Required</b></em>' attribute.
	 * @generated
	 */
	public boolean isRequiredGen() {
		// TODO: implement this derived getter to return the 'Is Required' attribute
		// Ensure that you remove @generated or mark it @generated NOT
		throw new UnsupportedOperationException();
	}

	public boolean isRequired() {
		// TODO: test this derived getter
		ExtensionEnd ownedEnd = 0 < getOwnedEnds().size() ? (ExtensionEnd) getOwnedEnds().get(0) : null;
		return null != ownedEnd && 1 == ownedEnd.getLower();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * Returns the derived value of the '<em><b>Metaclass</b></em>' reference.
	 * @generated
	 */
	public org.eclipse.uml2.Class getMetaclass() {
		org.eclipse.uml2.Class metaclass = basicGetMetaclass();
		return metaclass == null ? null : (org.eclipse.uml2.Class)eResolveProxy((InternalEObject)metaclass);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * Returns the derived value of the '<em><b>Metaclass</b></em>' reference.
	 * @generated
	 */
	public org.eclipse.uml2.Class basicGetMetaclassGen() {
		// TODO: implement this derived basic getter to return the 'Metaclass' reference
		// -> do not perform proxy resolution
		// Ensure that you remove @generated or mark it @generated NOT
		throw new UnsupportedOperationException();
	}

	public org.eclipse.uml2.Class basicGetMetaclass() {
		// TODO: test this derived basic getter
		for (Iterator memberEnds = getMemberEnds().iterator(); memberEnds.hasNext();) {
			Property memberEnd = (Property) memberEnds.next();

			if (!getOwnedEnds().contains(memberEnd)) {
				return (org.eclipse.uml2.Class) memberEnd.getType();
			}
		}

		return null;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetMetaclass(org.eclipse.uml2.Class newMetaclass, NotificationChain msgs) {
		// TODO: test this derived basic setter
		throw new UnsupportedOperationException();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * Returns the value of the '<em><b>Owned End</b></em>' containment reference.
	 * <p>
	 * Redefines the following features:
	 * <ul>
	 *   <li>{@link org.eclipse.uml2.Association#getOwnedEnds}</li>
	 * </ul>
	 * </p>
	 * @generated
	 */
	public EList getOwnedEndsGen() {
		// TODO: implement this redefinition getter
		// Ensure that you remove @generated or mark it @generated NOT
		throw new UnsupportedOperationException();
	}

	public EList getOwnedEnds() {
		// TODO: test this redefinition getter
		if (ownedEnd == null) {
			ownedEnd =
				new SubsetEObjectContainmentWithInverseEList(
					ExtensionEnd.class,
					this,
					UML2Package.EXTENSION__OWNED_END,
					new int[] { UML2Package.EXTENSION__MEMBER_END },
					UML2Package.EXTENSION_END__OWNING_ASSOCIATION);
		}
		return ownedEnd;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain eInverseAdd(InternalEObject otherEnd, int featureID, Class baseClass, NotificationChain msgs) {
		if (featureID >= 0) {
			switch (eDerivedStructuralFeatureID(featureID, baseClass)) {
				case UML2Package.EXTENSION__EANNOTATIONS:
					return ((InternalEList)getEAnnotations()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__TEMPLATE_BINDING:
					return ((InternalEList)getTemplateBindings()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__OWNED_TEMPLATE_SIGNATURE:
					if (ownedTemplateSignature != null)
						msgs = ((InternalEObject)ownedTemplateSignature).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - UML2Package.EXTENSION__OWNED_TEMPLATE_SIGNATURE, null, msgs);
					return basicSetOwnedTemplateSignature((TemplateSignature)otherEnd, msgs);
				case UML2Package.EXTENSION__CLIENT_DEPENDENCY:
					return ((InternalEList)getClientDependencies()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__OWNED_RULE:
					return ((InternalEList)getOwnedRules()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__ELEMENT_IMPORT:
					return ((InternalEList)getElementImports()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__PACKAGE_IMPORT:
					return ((InternalEList)getPackageImports()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__TEMPLATE_PARAMETER:
					if (templateParameter != null)
						msgs = ((InternalEObject)templateParameter).eInverseRemove(this, UML2Package.TEMPLATE_PARAMETER__PARAMETERED_ELEMENT, TemplateParameter.class, msgs);
					return basicSetTemplateParameter((TemplateParameter)otherEnd, msgs);
				case UML2Package.EXTENSION__OWNING_PARAMETER:
					if (eContainer != null)
						msgs = eBasicRemoveFromContainer(msgs);
					return eBasicSetContainer(otherEnd, UML2Package.EXTENSION__OWNING_PARAMETER, msgs);
				case UML2Package.EXTENSION__GENERALIZATION:
					return ((InternalEList)getGeneralizations()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__POWERTYPE_EXTENT:
					return ((InternalEList)getPowertypeExtents()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__SUBSTITUTION:
					return ((InternalEList)getSubstitutions()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__OWNED_END:
					return ((InternalEList)getOwnedEnds()).basicAdd(otherEnd, msgs);
				case UML2Package.EXTENSION__MEMBER_END:
					return ((InternalEList)getMemberEnds()).basicAdd(otherEnd, msgs);
				default:
					return eDynamicInverseAdd(otherEnd, featureID, baseClass, msgs);
			}
		}
		if (eContainer != null)
			msgs = eBasicRemoveFromContainer(msgs);
		return eBasicSetContainer(otherEnd, featureID, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, Class baseClass, NotificationChain msgs) {
		if (featureID >= 0) {
			switch (eDerivedStructuralFeatureID(featureID, baseClass)) {
				case UML2Package.EXTENSION__EANNOTATIONS:
					return ((InternalEList)getEAnnotations()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__OWNED_COMMENT:
					return ((InternalEList)getOwnedComments()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__TEMPLATE_BINDING:
					return ((InternalEList)getTemplateBindings()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__OWNED_TEMPLATE_SIGNATURE:
					return basicSetOwnedTemplateSignature(null, msgs);
				case UML2Package.EXTENSION__CLIENT_DEPENDENCY:
					return ((InternalEList)getClientDependencies()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__NAME_EXPRESSION:
					return basicSetNameExpression(null, msgs);
				case UML2Package.EXTENSION__OWNED_RULE:
					return ((InternalEList)getOwnedRules()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__ELEMENT_IMPORT:
					return ((InternalEList)getElementImports()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__PACKAGE_IMPORT:
					return ((InternalEList)getPackageImports()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__TEMPLATE_PARAMETER:
					return basicSetTemplateParameter(null, msgs);
				case UML2Package.EXTENSION__OWNING_PARAMETER:
					return eBasicSetContainer(null, UML2Package.EXTENSION__OWNING_PARAMETER, msgs);
				case UML2Package.EXTENSION__GENERALIZATION:
					return ((InternalEList)getGeneralizations()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__POWERTYPE_EXTENT:
					return ((InternalEList)getPowertypeExtents()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__SUBSTITUTION:
					return ((InternalEList)getSubstitutions()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__OWNED_USE_CASE:
					return ((InternalEList)getOwnedUseCases()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__OCCURRENCE:
					return ((InternalEList)getOccurrences()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__OWNED_END:
					return ((InternalEList)getOwnedEnds()).basicRemove(otherEnd, msgs);
				case UML2Package.EXTENSION__MEMBER_END:
					return ((InternalEList)getMemberEnds()).basicRemove(otherEnd, msgs);
				default:
					return eDynamicInverseRemove(otherEnd, featureID, baseClass, msgs);
			}
		}
		return eBasicSetContainer(null, featureID, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain eBasicRemoveFromContainer(NotificationChain msgs) {
		if (eContainerFeatureID >= 0) {
			switch (eContainerFeatureID) {
				case UML2Package.EXTENSION__OWNING_PARAMETER:
					return eContainer.eInverseRemove(this, UML2Package.TEMPLATE_PARAMETER__OWNED_PARAMETERED_ELEMENT, TemplateParameter.class, msgs);
				default:
					return eDynamicBasicRemoveFromContainer(msgs);
			}
		}
		return eContainer.eInverseRemove(this, EOPPOSITE_FEATURE_BASE - eContainerFeatureID, null, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Object eGet(EStructuralFeature eFeature, boolean resolve) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case UML2Package.EXTENSION__EANNOTATIONS:
				return getEAnnotations();
			case UML2Package.EXTENSION__OWNED_ELEMENT:
				return getOwnedElements();
			case UML2Package.EXTENSION__OWNER:
				if (resolve) return getOwner();
				return basicGetOwner();
			case UML2Package.EXTENSION__OWNED_COMMENT:
				return getOwnedComments();
			case UML2Package.EXTENSION__TEMPLATE_BINDING:
				return getTemplateBindings();
			case UML2Package.EXTENSION__OWNED_TEMPLATE_SIGNATURE:
				return getOwnedTemplateSignature();
			case UML2Package.EXTENSION__NAME:
				return getName();
			case UML2Package.EXTENSION__QUALIFIED_NAME:
				return getQualifiedName();
			case UML2Package.EXTENSION__VISIBILITY:
				return getVisibility();
			case UML2Package.EXTENSION__CLIENT_DEPENDENCY:
				return getClientDependencies();
			case UML2Package.EXTENSION__NAME_EXPRESSION:
				return getNameExpression();
			case UML2Package.EXTENSION__MEMBER:
				return getMembers();
			case UML2Package.EXTENSION__OWNED_RULE:
				return getOwnedRules();
			case UML2Package.EXTENSION__IMPORTED_MEMBER:
				return getImportedMembers();
			case UML2Package.EXTENSION__ELEMENT_IMPORT:
				return getElementImports();
			case UML2Package.EXTENSION__PACKAGE_IMPORT:
				return getPackageImports();
			case UML2Package.EXTENSION__TEMPLATE_PARAMETER:
				if (resolve) return getTemplateParameter();
				return basicGetTemplateParameter();
			case UML2Package.EXTENSION__OWNING_PARAMETER:
				return getOwningParameter();
			case UML2Package.EXTENSION__PACKAGEABLE_ELEMENT_VISIBILITY:
				return getPackageableElement_visibility();
			case UML2Package.EXTENSION__PACKAGE:
				if (resolve) return getPackage();
				return basicGetPackage();
			case UML2Package.EXTENSION__REDEFINITION_CONTEXT:
				return getRedefinitionContexts();
			case UML2Package.EXTENSION__IS_LEAF:
				return isLeaf() ? Boolean.TRUE : Boolean.FALSE;
			case UML2Package.EXTENSION__FEATURE:
				return getFeatures();
			case UML2Package.EXTENSION__IS_ABSTRACT:
				return isAbstract() ? Boolean.TRUE : Boolean.FALSE;
			case UML2Package.EXTENSION__INHERITED_MEMBER:
				return getInheritedMembers();
			case UML2Package.EXTENSION__GENERAL:
				return getGenerals();
			case UML2Package.EXTENSION__GENERALIZATION:
				return getGeneralizations();
			case UML2Package.EXTENSION__ATTRIBUTE:
				return getAttributes();
			case UML2Package.EXTENSION__REDEFINED_CLASSIFIER:
				return getRedefinedClassifiers();
			case UML2Package.EXTENSION__POWERTYPE_EXTENT:
				return getPowertypeExtents();
			case UML2Package.EXTENSION__SUBSTITUTION:
				return getSubstitutions();
			case UML2Package.EXTENSION__OWNED_USE_CASE:
				return getOwnedUseCases();
			case UML2Package.EXTENSION__REPRESENTATION:
				return getRepresentation();
			case UML2Package.EXTENSION__OCCURRENCE:
				return getOccurrences();
			case UML2Package.EXTENSION__RELATED_ELEMENT:
				return getRelatedElements();
			case UML2Package.EXTENSION__IS_DERIVED:
				return isDerived() ? Boolean.TRUE : Boolean.FALSE;
			case UML2Package.EXTENSION__OWNED_END:
				return getOwnedEnds();
			case UML2Package.EXTENSION__END_TYPE:
				return getEndTypes();
			case UML2Package.EXTENSION__MEMBER_END:
				return getMemberEnds();
			case UML2Package.EXTENSION__IS_REQUIRED:
				return isRequired() ? Boolean.TRUE : Boolean.FALSE;
			case UML2Package.EXTENSION__METACLASS:
				if (resolve) return getMetaclass();
				return basicGetMetaclass();
		}
		return eDynamicGet(eFeature, resolve);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void eSet(EStructuralFeature eFeature, Object newValue) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case UML2Package.EXTENSION__EANNOTATIONS:
				getEAnnotations().clear();
				getEAnnotations().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__OWNED_COMMENT:
				getOwnedComments().clear();
				getOwnedComments().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__TEMPLATE_BINDING:
				getTemplateBindings().clear();
				getTemplateBindings().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__OWNED_TEMPLATE_SIGNATURE:
				setOwnedTemplateSignature((TemplateSignature)newValue);
				return;
			case UML2Package.EXTENSION__NAME:
				setName((String)newValue);
				return;
			case UML2Package.EXTENSION__VISIBILITY:
				setVisibility((VisibilityKind)newValue);
				return;
			case UML2Package.EXTENSION__CLIENT_DEPENDENCY:
				getClientDependencies().clear();
				getClientDependencies().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__NAME_EXPRESSION:
				setNameExpression((StringExpression)newValue);
				return;
			case UML2Package.EXTENSION__OWNED_RULE:
				getOwnedRules().clear();
				getOwnedRules().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__ELEMENT_IMPORT:
				getElementImports().clear();
				getElementImports().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__PACKAGE_IMPORT:
				getPackageImports().clear();
				getPackageImports().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__TEMPLATE_PARAMETER:
				setTemplateParameter((TemplateParameter)newValue);
				return;
			case UML2Package.EXTENSION__OWNING_PARAMETER:
				setOwningParameter((TemplateParameter)newValue);
				return;
			case UML2Package.EXTENSION__PACKAGEABLE_ELEMENT_VISIBILITY:
				setPackageableElement_visibility((VisibilityKind)newValue);
				return;
			case UML2Package.EXTENSION__IS_LEAF:
				setIsLeaf(((Boolean)newValue).booleanValue());
				return;
			case UML2Package.EXTENSION__IS_ABSTRACT:
				setIsAbstract(((Boolean)newValue).booleanValue());
				return;
			case UML2Package.EXTENSION__GENERALIZATION:
				getGeneralizations().clear();
				getGeneralizations().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__REDEFINED_CLASSIFIER:
				getRedefinedClassifiers().clear();
				getRedefinedClassifiers().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__POWERTYPE_EXTENT:
				getPowertypeExtents().clear();
				getPowertypeExtents().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__SUBSTITUTION:
				getSubstitutions().clear();
				getSubstitutions().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__OWNED_USE_CASE:
				getOwnedUseCases().clear();
				getOwnedUseCases().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__REPRESENTATION:
				setRepresentation((CollaborationOccurrence)newValue);
				return;
			case UML2Package.EXTENSION__OCCURRENCE:
				getOccurrences().clear();
				getOccurrences().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__IS_DERIVED:
				setIsDerived(((Boolean)newValue).booleanValue());
				return;
			case UML2Package.EXTENSION__OWNED_END:
				getOwnedEnds().clear();
				getOwnedEnds().addAll((Collection)newValue);
				return;
			case UML2Package.EXTENSION__MEMBER_END:
				getMemberEnds().clear();
				getMemberEnds().addAll((Collection)newValue);
				return;
		}
		eDynamicSet(eFeature, newValue);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void eUnset(EStructuralFeature eFeature) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case UML2Package.EXTENSION__EANNOTATIONS:
				getEAnnotations().clear();
				return;
			case UML2Package.EXTENSION__OWNED_COMMENT:
				getOwnedComments().clear();
				return;
			case UML2Package.EXTENSION__TEMPLATE_BINDING:
				getTemplateBindings().clear();
				return;
			case UML2Package.EXTENSION__OWNED_TEMPLATE_SIGNATURE:
				setOwnedTemplateSignature((TemplateSignature)null);
				return;
			case UML2Package.EXTENSION__NAME:
				setName(NAME_EDEFAULT);
				return;
			case UML2Package.EXTENSION__VISIBILITY:
				setVisibility(VISIBILITY_EDEFAULT);
				return;
			case UML2Package.EXTENSION__CLIENT_DEPENDENCY:
				getClientDependencies().clear();
				return;
			case UML2Package.EXTENSION__NAME_EXPRESSION:
				setNameExpression((StringExpression)null);
				return;
			case UML2Package.EXTENSION__OWNED_RULE:
				getOwnedRules().clear();
				return;
			case UML2Package.EXTENSION__ELEMENT_IMPORT:
				getElementImports().clear();
				return;
			case UML2Package.EXTENSION__PACKAGE_IMPORT:
				getPackageImports().clear();
				return;
			case UML2Package.EXTENSION__TEMPLATE_PARAMETER:
				setTemplateParameter((TemplateParameter)null);
				return;
			case UML2Package.EXTENSION__OWNING_PARAMETER:
				setOwningParameter(null);
				return;
			case UML2Package.EXTENSION__PACKAGEABLE_ELEMENT_VISIBILITY:
				setPackageableElement_visibility(PACKAGEABLE_ELEMENT_VISIBILITY_EDEFAULT);
				return;
			case UML2Package.EXTENSION__IS_LEAF:
				setIsLeaf(IS_LEAF_EDEFAULT);
				return;
			case UML2Package.EXTENSION__IS_ABSTRACT:
				setIsAbstract(IS_ABSTRACT_EDEFAULT);
				return;
			case UML2Package.EXTENSION__GENERALIZATION:
				getGeneralizations().clear();
				return;
			case UML2Package.EXTENSION__REDEFINED_CLASSIFIER:
				getRedefinedClassifiers().clear();
				return;
			case UML2Package.EXTENSION__POWERTYPE_EXTENT:
				getPowertypeExtents().clear();
				return;
			case UML2Package.EXTENSION__SUBSTITUTION:
				getSubstitutions().clear();
				return;
			case UML2Package.EXTENSION__OWNED_USE_CASE:
				getOwnedUseCases().clear();
				return;
			case UML2Package.EXTENSION__REPRESENTATION:
				setRepresentation((CollaborationOccurrence)null);
				return;
			case UML2Package.EXTENSION__OCCURRENCE:
				getOccurrences().clear();
				return;
			case UML2Package.EXTENSION__IS_DERIVED:
				setIsDerived(IS_DERIVED_EDEFAULT);
				return;
			case UML2Package.EXTENSION__OWNED_END:
				getOwnedEnds().clear();
				return;
			case UML2Package.EXTENSION__MEMBER_END:
				getMemberEnds().clear();
				return;
		}
		eDynamicUnset(eFeature);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean eIsSet(EStructuralFeature eFeature) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case UML2Package.EXTENSION__EANNOTATIONS:
				return eAnnotations != null && !eAnnotations.isEmpty();
			case UML2Package.EXTENSION__OWNED_ELEMENT:
				return !getOwnedElements().isEmpty();
			case UML2Package.EXTENSION__OWNER:
				return basicGetOwner() != null;
			case UML2Package.EXTENSION__OWNED_COMMENT:
				return ownedComment != null && !ownedComment.isEmpty();
			case UML2Package.EXTENSION__TEMPLATE_BINDING:
				return templateBinding != null && !templateBinding.isEmpty();
			case UML2Package.EXTENSION__OWNED_TEMPLATE_SIGNATURE:
				return ownedTemplateSignature != null;
			case UML2Package.EXTENSION__NAME:
				return NAME_EDEFAULT == null ? name != null : !NAME_EDEFAULT.equals(name);
			case UML2Package.EXTENSION__QUALIFIED_NAME:
				return !"".equals(getQualifiedName()); //$NON-NLS-1$
			case UML2Package.EXTENSION__VISIBILITY:
				return visibility != VISIBILITY_EDEFAULT;
			case UML2Package.EXTENSION__CLIENT_DEPENDENCY:
				return clientDependency != null && !clientDependency.isEmpty();
			case UML2Package.EXTENSION__NAME_EXPRESSION:
				return nameExpression != null;
			case UML2Package.EXTENSION__MEMBER:
				return !getMembers().isEmpty();
			case UML2Package.EXTENSION__OWNED_RULE:
				return ownedRule != null && !ownedRule.isEmpty();
			case UML2Package.EXTENSION__IMPORTED_MEMBER:
				return !getImportedMembers().isEmpty();
			case UML2Package.EXTENSION__ELEMENT_IMPORT:
				return elementImport != null && !elementImport.isEmpty();
			case UML2Package.EXTENSION__PACKAGE_IMPORT:
				return packageImport != null && !packageImport.isEmpty();
			case UML2Package.EXTENSION__TEMPLATE_PARAMETER:
				return templateParameter != null;
			case UML2Package.EXTENSION__OWNING_PARAMETER:
				return getOwningParameter() != null;
			case UML2Package.EXTENSION__PACKAGEABLE_ELEMENT_VISIBILITY:
				return packageableElement_visibility != PACKAGEABLE_ELEMENT_VISIBILITY_EDEFAULT;
			case UML2Package.EXTENSION__PACKAGE:
				return basicGetPackage() != null;
			case UML2Package.EXTENSION__REDEFINITION_CONTEXT:
				return !getRedefinitionContexts().isEmpty();
			case UML2Package.EXTENSION__IS_LEAF:
				return isLeaf != IS_LEAF_EDEFAULT;
			case UML2Package.EXTENSION__FEATURE:
				return !getFeatures().isEmpty();
			case UML2Package.EXTENSION__IS_ABSTRACT:
				return isAbstract != IS_ABSTRACT_EDEFAULT;
			case UML2Package.EXTENSION__INHERITED_MEMBER:
				return !getInheritedMembers().isEmpty();
			case UML2Package.EXTENSION__GENERAL:
				return !getGenerals().isEmpty();
			case UML2Package.EXTENSION__GENERALIZATION:
				return generalization != null && !generalization.isEmpty();
			case UML2Package.EXTENSION__ATTRIBUTE:
				return !getAttributes().isEmpty();
			case UML2Package.EXTENSION__REDEFINED_CLASSIFIER:
				return redefinedClassifier != null && !redefinedClassifier.isEmpty();
			case UML2Package.EXTENSION__POWERTYPE_EXTENT:
				return powertypeExtent != null && !powertypeExtent.isEmpty();
			case UML2Package.EXTENSION__SUBSTITUTION:
				return substitution != null && !substitution.isEmpty();
			case UML2Package.EXTENSION__OWNED_USE_CASE:
				return ownedUseCase != null && !ownedUseCase.isEmpty();
			case UML2Package.EXTENSION__REPRESENTATION:
				return representation != null;
			case UML2Package.EXTENSION__OCCURRENCE:
				return occurrence != null && !occurrence.isEmpty();
			case UML2Package.EXTENSION__RELATED_ELEMENT:
				return !getRelatedElements().isEmpty();
			case UML2Package.EXTENSION__IS_DERIVED:
				return isDerived != IS_DERIVED_EDEFAULT;
			case UML2Package.EXTENSION__OWNED_END:
				return ownedEnd != null && !ownedEnd.isEmpty();
			case UML2Package.EXTENSION__END_TYPE:
				return !getEndTypes().isEmpty();
			case UML2Package.EXTENSION__MEMBER_END:
				return memberEnd != null && !memberEnd.isEmpty();
			case UML2Package.EXTENSION__IS_REQUIRED:
				return isRequired() != false;
			case UML2Package.EXTENSION__METACLASS:
				return basicGetMetaclass() != null;
		}
		return eDynamicIsSet(eFeature);
	}

} //ExtensionImpl