/*
 * Copyright (c) 2003, 2005 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: ExtensionImpl.java,v 1.25 2005/11/09 22:53:09 khussey Exp $
 */
package org.eclipse.uml2.impl;

import java.util.Iterator;

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.impl.ENotificationImpl;

//import org.eclipse.emf.ecore.util.EObjectContainmentEList;

import org.eclipse.uml2.Extension;
import org.eclipse.uml2.ExtensionEnd;
import org.eclipse.uml2.Property;
import org.eclipse.uml2.UML2Factory;
import org.eclipse.uml2.UML2Package;

import org.eclipse.uml2.common.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>
 *   <li>{@link org.eclipse.uml2.impl.ExtensionImpl#getOwnedEnds <em>Owned End</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) IBM Corporation and others."; //$NON-NLS-1$

	/**
	 * The default value of the '{@link #isRequired() <em>Is Required</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #isRequired()
	 * @generated
	 * @ordered
	 */
	protected static final boolean IS_REQUIRED_EDEFAULT = false;

	/**
	 * <!-- 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 -->
	 * @generated NOT
	 */
	public boolean isRequired() {
		ExtensionEnd ownedEnd = 0 < getOwnedEnds().size() ? (ExtensionEnd) getOwnedEnds().get(0) : null;
		return null != ownedEnd && 1 == ownedEnd.getLower();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public org.eclipse.uml2.Class getMetaclass() {
		org.eclipse.uml2.Class metaclass = basicGetMetaclass();
		return metaclass == null ? null : (metaclass.eIsProxy() ? (org.eclipse.uml2.Class)eResolveProxy((InternalEObject)metaclass) : metaclass);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
	public org.eclipse.uml2.Class basicGetMetaclass() {

		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 NOT
	 */
	public EList getOwnedEnds() {
		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 NOT
	 * @deprecated Use #createOwnedEnd() instead.
	 */
	public Property createOwnedEnd(EClass eClass) {
		ExtensionEnd newOwnedEnd = (ExtensionEnd) eClass.getEPackage().getEFactoryInstance().create(eClass);
		if (eNotificationRequired()) {
			eNotify(new ENotificationImpl(this, 0, UML2Package.EXTENSION__OWNED_END, null, newOwnedEnd));
		}
		getOwnedEnds().add(newOwnedEnd);
		return newOwnedEnd;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Property createOwnedEnd() {
		ExtensionEnd newOwnedEnd = UML2Factory.eINSTANCE.createExtensionEnd();
		if (eNotificationRequired()) {
			eNotify(new ENotificationImpl(this, 0, UML2Package.EXTENSION__OWNED_END, null, newOwnedEnd));
		}
		getOwnedEnds().add(newOwnedEnd);
		return newOwnedEnd;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
    public Property getOwnedEnd(String name) {
		for (Iterator i = getOwnedEnds().iterator(); i.hasNext(); ) {
			ExtensionEnd ownedEnd = (ExtensionEnd) i.next();
			if (name.equals(ownedEnd.getName())) {
				return ownedEnd;
			}
		}
		return null;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean isSetOwnedEnds() {
		return ownedEnd != null && !ownedEnd.isEmpty();
	}

	/**
	 * <!-- 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:
				return getPackage();
			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__SUBSTITUTION:
				return getSubstitutions();
			case UML2Package.EXTENSION__POWERTYPE_EXTENT:
				return getPowertypeExtents();
			case UML2Package.EXTENSION__OWNED_USE_CASE:
				return getOwnedUseCases();
			case UML2Package.EXTENSION__USE_CASE:
				return getUseCases();
			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 boolean eIsSet(EStructuralFeature eFeature) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case UML2Package.EXTENSION__EANNOTATIONS:
				return eAnnotations != null && !eAnnotations.isEmpty();
			case UML2Package.EXTENSION__OWNED_ELEMENT:
				return isSetOwnedElements();
			case UML2Package.EXTENSION__OWNER:
				return isSetOwner();
			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 QUALIFIED_NAME_EDEFAULT == null ? getQualifiedName() != null : !QUALIFIED_NAME_EDEFAULT.equals(getQualifiedName());
			case UML2Package.EXTENSION__VISIBILITY:
				return isSetVisibility();
			case UML2Package.EXTENSION__CLIENT_DEPENDENCY:
				return clientDependency != null && !clientDependency.isEmpty();
			case UML2Package.EXTENSION__NAME_EXPRESSION:
				return nameExpression != null;
			case UML2Package.EXTENSION__MEMBER:
				return isSetMembers();
			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 isSetPackageableElement_visibility();
			case UML2Package.EXTENSION__PACKAGE:
				return getPackage() != null;
			case UML2Package.EXTENSION__REDEFINITION_CONTEXT:
				return isSetRedefinitionContexts();
			case UML2Package.EXTENSION__IS_LEAF:
				return ((eFlags & IS_LEAF_EFLAG) != 0) != IS_LEAF_EDEFAULT;
			case UML2Package.EXTENSION__FEATURE:
				return isSetFeatures();
			case UML2Package.EXTENSION__IS_ABSTRACT:
				return ((eFlags & IS_ABSTRACT_EFLAG) != 0) != 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 isSetAttributes();
			case UML2Package.EXTENSION__REDEFINED_CLASSIFIER:
				return redefinedClassifier != null && !redefinedClassifier.isEmpty();
			case UML2Package.EXTENSION__SUBSTITUTION:
				return substitution != null && !substitution.isEmpty();
			case UML2Package.EXTENSION__POWERTYPE_EXTENT:
				return powertypeExtent != null && !powertypeExtent.isEmpty();
			case UML2Package.EXTENSION__OWNED_USE_CASE:
				return ownedUseCase != null && !ownedUseCase.isEmpty();
			case UML2Package.EXTENSION__USE_CASE:
				return useCase != null && !useCase.isEmpty();
			case UML2Package.EXTENSION__REPRESENTATION:
				return representation != null;
			case UML2Package.EXTENSION__OCCURRENCE:
				return occurrence != null && !occurrence.isEmpty();
			case UML2Package.EXTENSION__RELATED_ELEMENT:
				return isSetRelatedElements();
			case UML2Package.EXTENSION__IS_DERIVED:
				return ((eFlags & IS_DERIVED_EFLAG) != 0) != IS_DERIVED_EDEFAULT;
			case UML2Package.EXTENSION__OWNED_END:
				return isSetOwnedEnds();
			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() != IS_REQUIRED_EDEFAULT;
			case UML2Package.EXTENSION__METACLASS:
				return basicGetMetaclass() != null;
		}
		return eDynamicIsSet(eFeature);
	}


} //ExtensionImpl