/*******************************************************************************
 * Copyright (c) 2001, 2004 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
 *******************************************************************************/
package org.eclipse.jst.j2ee.internal.ejb.impl;

import java.lang.reflect.Constructor;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;
import org.eclipse.emf.common.util.BasicEList;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.emf.ecore.impl.EObjectImpl;
import org.eclipse.emf.ecore.util.EObjectContainmentEList;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.ecore.util.InternalEList;
import org.eclipse.emf.ecore.xmi.XMIResource;
import org.eclipse.jst.j2ee.common.Description;
import org.eclipse.jst.j2ee.ejb.CMPAttribute;
import org.eclipse.jst.j2ee.ejb.CMRField;
import org.eclipse.jst.j2ee.ejb.CommonRelationship;
import org.eclipse.jst.j2ee.ejb.CommonRelationshipRole;
import org.eclipse.jst.j2ee.ejb.ContainerManagedEntity;
import org.eclipse.jst.j2ee.ejb.EJBRelation;
import org.eclipse.jst.j2ee.ejb.EJBRelationshipRole;
import org.eclipse.jst.j2ee.ejb.EjbPackage;
import org.eclipse.jst.j2ee.ejb.IRoleShapeStrategy;
import org.eclipse.jst.j2ee.ejb.MultiplicityKind;
import org.eclipse.jst.j2ee.ejb.RoleSource;
import org.eclipse.wst.common.internal.emf.utilities.IDUtil;

import com.ibm.wtp.common.logger.proxy.Logger;
/**
 * The ejb-relationship-role element describes a role within a relationship.
 * There are two roles in each relationship. The ejb-relationship-role element contains an optional description; an optional name for the relationship role; a specification of the multiplicity of the role; an optional specification of cascade-delete functionality for the role; the role source; and a declaration of the cmr-field, if any, by means of which the other side of the relationship is accessed from the perspective of the role source. The multiplicity and relationship-role-source element are mandatory. The relationship-role-source element designates an entity-bean by means of an ejb-name element. For bidirectional relationships, both roles of a relationship must declare a relationship-role-source element that specifies a cmr-field in terms of which the relationship is accessed. The lack of a cmr-field element in an ejb-relationship-role specifies that the relationship is unidirectional in navigability and that entity bean that participates in the relationship is "not aware" of the relationship.
 * 
 * @invariant multiplicity != null
 * @invariant roleSource != null
 * @invariant Cascade delete can only be specified in an EJBRelationshipRole element in which the roleSource element specifies a dependent object class. 
 * @invariant Cascade delete can only be specified for an EJBRelationshipRole contained in an EJBRelation in which the other EJBRelationshipRole element specifies a multiplicity of One.
 * 
 * Example:
 * <ejb-relation>
 *   <ejb-relation-name>Product-LineItem<//ejb-relation-name>
 *   <ejb-relationship-role>
 *     <ejb-relationship-role-name>product-has-lineitems<//ejb-relationship-role-name>
 *     <multiplicity>One<//multiplicity>
 *     <relationship-role-source>
 *       <ejb-name>ProductEJB<//ejb-name>
 *     <//relationship-role-source>
 *   <//ejb-relationship-role>
 * ...
 */
public class EJBRelationshipRoleImpl extends EObjectImpl implements EJBRelationshipRole, EObject, CommonRelationshipRole {


	/**
	 * The default value of the '{@link #getDescription() <em>Description</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getDescription()
	 * @generated
	 * @ordered
	 */
	protected static final String DESCRIPTION_EDEFAULT = null;

	protected static final EList EMPTY_ELIST = new org.eclipse.emf.common.util.BasicEList(0);

	// Need to cache the computed attributes so that they maintain identity
	protected EList fAttributes = null;
	protected String fName = null;
	protected IRoleShapeStrategy roleShapeStrategy;
	private static final String ROLE_STRATEGY_CLASS_NAME = "org.eclipse.jst.j2ee.internal.ejb.impl.EJB20FlattenedRoleShapeStrategy"; //$NON-NLS-1$
	private static final String COMMON_ROLE_CLASS_NAME = "org.eclipse.jst.j2ee.ejb.CommonRelationshipRole"; //$NON-NLS-1$
	private static Class COMMON_ROLE_CLASS;
	private static Class ROLE_STRATEGY_CLASS;
	private static Constructor ROLE_STRATEGY_CONSTRUCTOR;
	private static final String NAME_SUFFIX = "Inverse"; //$NON-NLS-1$
    
	private boolean toStringGuard;

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	protected String description = DESCRIPTION_EDEFAULT;
	/**
	 * The default value of the '{@link #getRoleName() <em>Role Name</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getRoleName()
	 * @generated
	 * @ordered
	 */
	protected static final String ROLE_NAME_EDEFAULT = null;

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	protected String roleName = ROLE_NAME_EDEFAULT;
	/**
	 * The default value of the '{@link #getMultiplicity() <em>Multiplicity</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getMultiplicity()
	 * @generated
	 * @ordered
	 */
	protected static final MultiplicityKind MULTIPLICITY_EDEFAULT = MultiplicityKind.ONE_LITERAL;

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	protected MultiplicityKind multiplicity = MULTIPLICITY_EDEFAULT;
	/**
	 * This is true if the Multiplicity attribute has been set.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 * @ordered
	 */
	protected boolean multiplicityESet = false;

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

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	protected boolean cascadeDelete = CASCADE_DELETE_EDEFAULT;
	/**
	 * This is true if the Cascade Delete attribute has been set.
	 * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
	 * @generated
	 * @ordered
	 */
  protected boolean cascadeDeleteESet = false;

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	protected RoleSource source = null;
	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	protected CMRField cmrField = null;
	/**
	 * The cached value of the '{@link #getDescriptions() <em>Descriptions</em>}' containment reference list.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getDescriptions()
	 * @generated
	 * @ordered
	 */
	protected EList descriptions = null;

	private boolean wasForward = false;
	private boolean wasMany = false;
    
	private boolean isKeySet = false;
	private boolean key = false;
	
	private transient Boolean required = null;

	public EJBRelationshipRoleImpl() {
		super();
	}
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected EClass eStaticClass() {
		return EjbPackage.eINSTANCE.getEJBRelationshipRole();
	}

	/**
	 * Return the persistentAttributes from my Entity that are used
	 * by this role.
	 */
	
	public EList getAttributes() {
		if (fAttributes == null) {
			fAttributes = new BasicEList(1);
		}
		if (fAttributes.isEmpty()) {
			getRoleShapeStrategy().reconcileAttributes(fAttributes);
		}
		return fAttributes;
	}
	/**
	 * Return our parent relationship as a CommonRelationship
	 */

	public CommonRelationship getCommonRelationship() {
		return getRelationship();
	}
	protected IRoleShapeStrategy getDefaultRoleShapeStrategy() {
		try {
			return (IRoleShapeStrategy) getRoleStrategyConstructor(this).newInstance(new Object[] { this });
		} catch (Throwable t) {
			Logger.getLogger().logError("EJBRelationshipRoleImpl:Could not instantiate role shape strategy; this requires extensions"); //$NON-NLS-1$
			Logger.getLogger().logError(t);
			return null;
		}

	}


	/**
	 * @return The logical name which can be used for naming this role.
	 * Required to be unique within a JAR.
	 * If a cmr-field is defined, then a name in the form %source-ejb-name%_%cmr-field-name% is computed.
	 * Otherwise a default ID is generated.
	 */
	public String getLogicalName() {
		String result = null;
		String qualifier = getCmrField().getName();
		if (qualifier != null) {
			result = getSource().getEntityBean().getName() + "_" + qualifier; //$NON-NLS-1$
		} else {
			// Apply a default ID
			result = IDUtil.getOrAssignID(this);
		}
		return result;
	}
	/**
	 * @return The name for this role, derived from the CMR-field name
	 * Used to determine the name used in querying this role as well as the accessor method names which implement it.
	 * Note: may return the XMI ID for non-navigable roles, ie - where there is no CMR-field.
	 */
	public String getName() {
		if (fName == null) {
			if (getCmrField() != null)
				fName = getCmrField().getName();
			else if (getOpposite() != null) {
				EJBRelationshipRole op = getOpposite();
				if (op.getCmrField() != null)
					fName = op.getCmrField().getName() + op.getSourceEntity().getName() + NAME_SUFFIX;
			} else {
				if (eGetId() == null) 
					eSetId();
				fName = eGetId();
			}
		}
		return fName;
	}
	/**
	 * Return the other role.
	 */
	public EJBRelationshipRole getOpposite() {
		if (getRelationship() != null)
			return getRelationship().getOppositeRole(this);
		return null;
	}
	/**
	 * Return the other role.
	 */
	public CommonRelationshipRole getOppositeAsCommonRole() {
		return getOpposite();
	}

	/**
	 * Insert the method's description here.
	 * Creation date: (11/15/2000 6:50:30 PM)
	 * @return com.ibm.ejs.models.base.extensions.ejbext.impl.IRoleShapeStrategy
	 */
	public IRoleShapeStrategy getRoleShapeStrategy() {
		if (roleShapeStrategy == null)
			roleShapeStrategy = getDefaultRoleShapeStrategy();
		return roleShapeStrategy;
	}
	/**
	 * @return The Source ejb
	 * Compute the ContainerManagedEntity which is the source of a role that participates in a relationship. 
	 */
	public ContainerManagedEntity getSourceEntity() {
		if(null == getSource()) {
			return null;
		}
		return getSource().getEntityBean();
	}
	/**
	* @return The computed value of the isForward attribute
	* Specifies whether this role should be mapped to a persistent reference, such as a foreign key.
	* The current implementation is:
	* - if the role is many, it cannot be forward
	* - if the role is single and not navigable, it cannot be forward
	* - all other things being equal, the first role is considered to be forward
	* - clients can manipulate this by setting an ambiguous role to be fwd (by manipulating the role order under the covers).
	*/
	public boolean isForward() {
		if (this.isMany())
			return false;
		if (getOppositeAsCommonRole() == null)
			return wasForward;
		if (getOppositeAsCommonRole().isMany())
			return true;
	   // if (!this.isNavigable())  removed to allow non-navigable role in key
	   //    return false;
		if (getRelationship() == null)
			return wasForward;
		return (getRelationship().getFirstRole() == this);
	}
	/**
	* @return The computed value isKey
	*/
	public boolean isKey() {
		if (isKeySet)
			return key;
		return isKeyFromAttributes();
	}
    
	protected boolean isKeyFromAttributes() {
		List list = getAttributes();
		if (list.isEmpty())
			return false;
		Iterator it = list.iterator();
		CMPAttribute attribute;
		while (it.hasNext()) {
			attribute = (CMPAttribute) it.next();
			if (!attribute.isKey())
				return false;
		}
		return true;
	}
	
	/**
	 * This allows you to set the Role as being key so it will
	 * not traverse it attributes to determine if it is key.
	 */
	public void setKey(boolean aBoolean) {
		key = aBoolean;
		isKeySet = true;
	} 
 
	/**
	 * Handwritten version of isMany():
	 */
 
 
	public boolean isMany()  { 
		if (getOpposite() == null) 
			 return wasMany;  
		return getOpposite().getMultiplicity() == MultiplicityKind.MANY_LITERAL;  
	} 
 
         
	/**
	* @return The computed value of the isNavigable attribute
	* Specifies that accessors should be generated for this relationship role.
	* Current implementation is to test whether or not a CMR field exists.
	*/
	public boolean isNavigable() {
		return getCmrField() != null;
	}


	public void reconcileAttributes() {
		if (fAttributes != null)
			getRoleShapeStrategy().reconcileAttributes(fAttributes);
	}


	/**
	 * Set this role to be the forward role.
	 */
	public void setFoward() {
		getRelationship().setFoward(this);
	}
	public void setName(java.lang.String uniqueName) {
		fName = uniqueName;
	}
	public String toString() {
		if (toStringGuard) return super.toString();
		try {
			toStringGuard = true;
			String oppositeType = getOpposite() != null ? getTypeEntity().getName() : "<<unknown>>"; //$NON-NLS-1$
			return getName() + "(" + oppositeType + ")" + (isMany() ? " *" : " 1"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
		} catch (Exception e) {
			return e.toString();
		} finally {
			toStringGuard = false;
		}
	}

	private static Class getCommonRoleClass(Object caller) throws ClassNotFoundException {

		if (COMMON_ROLE_CLASS == null) {
			COMMON_ROLE_CLASS = loadClass(COMMON_ROLE_CLASS_NAME, caller);
		}
		return COMMON_ROLE_CLASS;
	}

	private static Class loadClass(String name, Object caller) throws ClassNotFoundException {
		ClassLoader cl = caller.getClass().getClassLoader();
		if (cl != null)
			return cl.loadClass(name);
		return Class.forName(name);
	}

	private static Class getRoleStrategyClass(Object caller) throws ClassNotFoundException {
		if (ROLE_STRATEGY_CLASS == null)
			ROLE_STRATEGY_CLASS = loadClass(ROLE_STRATEGY_CLASS_NAME, caller);
		return ROLE_STRATEGY_CLASS;
	}

	private static Constructor getRoleStrategyConstructor(Object caller) throws ClassNotFoundException, NoSuchMethodException {
		if (ROLE_STRATEGY_CONSTRUCTOR == null) {
			Class[] parmTypes = new Class[] { getCommonRoleClass(caller)};
			ROLE_STRATEGY_CONSTRUCTOR = getRoleStrategyClass(caller).getConstructor(parmTypes);
		}
		return ROLE_STRATEGY_CONSTRUCTOR;
	}

	/**
	 * @generated This field/method will be replaced during code generation 
	 * The description is used by the ejb-jar file producer to provide text describing 
	 * the ejb relationship role.
	 * 
	 * The description should include any information that the ejb-jar file producer
	 * wants to provide to the consumer of the ejb-jar file (i.e. to the Deployer).
	 * Typically, the tools used by the ejb-jar file consumer will display the
	 * description when processing the list of dependents.
	 */
	public String getDescription() {
		return description;
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public void setDescription(String newDescription) {
		String oldDescription = description;
		description = newDescription;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTION, oldDescription, description));
	}

	/**
	 * @generated This field/method will be replaced during code generation 
	 * Defines a name for a role that is unique within an ejb-relation. Different
	 * relationships can use the same name for a role.

	 */
	public String getRoleName() {
		return roleName;
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public void setRoleName(String newRoleName) {
		String oldRoleName = roleName;
		roleName = newRoleName;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, EjbPackage.EJB_RELATIONSHIP_ROLE__ROLE_NAME, oldRoleName, roleName));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public MultiplicityKind getMultiplicity() {
		return multiplicity;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setMultiplicity(MultiplicityKind newMultiplicity) {
		MultiplicityKind oldMultiplicity = multiplicity;
		multiplicity = newMultiplicity == null ? MULTIPLICITY_EDEFAULT : newMultiplicity;
		boolean oldMultiplicityESet = multiplicityESet;
		multiplicityESet = true;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, EjbPackage.EJB_RELATIONSHIP_ROLE__MULTIPLICITY, oldMultiplicity, multiplicity, !oldMultiplicityESet));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void unsetMultiplicity() {
		MultiplicityKind oldMultiplicity = multiplicity;
		boolean oldMultiplicityESet = multiplicityESet;
		multiplicity = MULTIPLICITY_EDEFAULT;
		multiplicityESet = false;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.UNSET, EjbPackage.EJB_RELATIONSHIP_ROLE__MULTIPLICITY, oldMultiplicity, MULTIPLICITY_EDEFAULT, oldMultiplicityESet));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean isSetMultiplicity() {
		return multiplicityESet;
	}

	/**
	 * @generated This field/method will be replaced during code generation 
	 * Specifies that, within a particular relationship, the lifetime of one or more
	 * entity beans is dependent upon the lifetime of another entity bean. The
	 * cascade-delete element can Cascade delete can only be specified for an
	 * EJBRelationshipRole contained in an EJBrelation in which the other
	 * EJBRelationshipRole element specifies a multiplicity of One.
	 * 
	 * 

	 */
	public boolean isCascadeDelete() {
		return cascadeDelete;
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public void setCascadeDelete(boolean newCascadeDelete) {
		boolean oldCascadeDelete = cascadeDelete;
		cascadeDelete = newCascadeDelete;
		boolean oldCascadeDeleteESet = cascadeDeleteESet;
		cascadeDeleteESet = true;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, EjbPackage.EJB_RELATIONSHIP_ROLE__CASCADE_DELETE, oldCascadeDelete, cascadeDelete, !oldCascadeDeleteESet));
	}

	/**
	 * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
	 * @generated
	 */
  public void unsetCascadeDelete() {
		boolean oldCascadeDelete = cascadeDelete;
		boolean oldCascadeDeleteESet = cascadeDeleteESet;
		cascadeDelete = CASCADE_DELETE_EDEFAULT;
		cascadeDeleteESet = false;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.UNSET, EjbPackage.EJB_RELATIONSHIP_ROLE__CASCADE_DELETE, oldCascadeDelete, CASCADE_DELETE_EDEFAULT, oldCascadeDeleteESet));
	}

	/**
	 * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
	 * @generated
	 */
  public boolean isSetCascadeDelete() {
		return cascadeDeleteESet;
	}

	/**
	 * @generated This field/method will be replaced during code generation 
	 */
	public EJBRelation getRelationship() {
		if (eContainerFeatureID != EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP) return null;
		return (EJBRelation)eContainer;
	}

	/**
	 * This field/method will be replaced during code generation.
	 */
	public void setRelationship(EJBRelation newContainer) {
		if (newContainer == null && getRelationship() != null) {
			updateCachedSettings();
			EJBRelationshipRoleImpl roleOpposite = (EJBRelationshipRoleImpl) getOpposite();
			if (roleOpposite != null)
				roleOpposite.updateCachedSettings();
		} else
			wasForward = false;
		setRelationshipGen(newContainer);
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jst.j2ee.internal.ejb.CommonRelationshipRole#getTargetAttributeName(org.eclipse.jst.j2ee.internal.ejb.CMPAttribute)
	 */
	public String getTargetAttributeName(CMPAttribute roleAttribute) {
		int roleNameSize = getName().length();
		return roleAttribute.getName().substring(roleNameSize + 1);
	}
	/**
	 * Method updateCachedSettings.
	 */
	protected void updateCachedSettings() {
		wasForward = isForward();
		wasMany = isMany();
	}

	/**
	 * @generated This field/method will be replaced during code generation 
	 * Designates the source of a role that participates in a relationship. A
	 * relationship-role-source element uniquely identifies an entity bean.
	 * @migration EJB1.1: was ibmejbext::EjbRelationshipRole::sourceEJBName, but that
	 * may not be sufficient, as this can now refer to dependent class names or ejb
	 * refs
	 */
	public RoleSource getSource() {
		return source;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetSource(RoleSource newSource, NotificationChain msgs) {
		RoleSource oldSource = source;
		source = newSource;
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, EjbPackage.EJB_RELATIONSHIP_ROLE__SOURCE, oldSource, newSource);
			if (msgs == null) msgs = notification; else msgs.add(notification);
		}
		return msgs;
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public void setSource(RoleSource newSource) {
		if (newSource != source) {
			NotificationChain msgs = null;
			if (source != null)
				msgs = ((InternalEObject)source).eInverseRemove(this, EjbPackage.ROLE_SOURCE__ROLE, RoleSource.class, msgs);
			if (newSource != null)
				msgs = ((InternalEObject)newSource).eInverseAdd(this, EjbPackage.ROLE_SOURCE__ROLE, RoleSource.class, msgs);
			msgs = basicSetSource(newSource, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, EjbPackage.EJB_RELATIONSHIP_ROLE__SOURCE, newSource, newSource));
	}

	/**
	 * @generated This field/method will be replaced during code generation 
	 * A declaration of the CMRField, if any, by means of which the other side of the
	 * relationship is accessed from the perspective of the role source
	 * 
	 * @migration EJB1.1: Used to be handled via ibmejbext::EjbRole::attributes list
	 */
	public CMRField getCmrField() {
		return cmrField;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetCmrField(CMRField newCmrField, NotificationChain msgs) {
		CMRField oldCmrField = cmrField;
		cmrField = newCmrField;
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, EjbPackage.EJB_RELATIONSHIP_ROLE__CMR_FIELD, oldCmrField, newCmrField);
			if (msgs == null) msgs = notification; else msgs.add(notification);
		}
		return msgs;
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public void setCmrField(CMRField newCmrField) {
		if (newCmrField != cmrField) {
			NotificationChain msgs = null;
			if (cmrField != null)
				msgs = ((InternalEObject)cmrField).eInverseRemove(this, EjbPackage.CMR_FIELD__ROLE, CMRField.class, msgs);
			if (newCmrField != null)
				msgs = ((InternalEObject)newCmrField).eInverseAdd(this, EjbPackage.CMR_FIELD__ROLE, CMRField.class, msgs);
			msgs = basicSetCmrField(newCmrField, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, EjbPackage.EJB_RELATIONSHIP_ROLE__CMR_FIELD, newCmrField, newCmrField));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public EList getDescriptions() {
		if (descriptions == null) {
			descriptions = new EObjectContainmentEList(Description.class, this, EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTIONS);
		}
		return descriptions;
	}

	/**
	 * <!-- 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 EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP:
					if (eContainer != null)
						msgs = eBasicRemoveFromContainer(msgs);
					return eBasicSetContainer(otherEnd, EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP, msgs);
				case EjbPackage.EJB_RELATIONSHIP_ROLE__SOURCE:
					if (source != null)
						msgs = ((InternalEObject)source).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - EjbPackage.EJB_RELATIONSHIP_ROLE__SOURCE, null, msgs);
					return basicSetSource((RoleSource)otherEnd, msgs);
				case EjbPackage.EJB_RELATIONSHIP_ROLE__CMR_FIELD:
					if (cmrField != null)
						msgs = ((InternalEObject)cmrField).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - EjbPackage.EJB_RELATIONSHIP_ROLE__CMR_FIELD, null, msgs);
					return basicSetCmrField((CMRField)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 EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP:
					return eBasicSetContainer(null, EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP, msgs);
				case EjbPackage.EJB_RELATIONSHIP_ROLE__SOURCE:
					return basicSetSource(null, msgs);
				case EjbPackage.EJB_RELATIONSHIP_ROLE__CMR_FIELD:
					return basicSetCmrField(null, msgs);
				case EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTIONS:
					return ((InternalEList)getDescriptions()).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 EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP:
					return eContainer.eInverseRemove(this, EjbPackage.EJB_RELATION__RELATIONSHIP_ROLES, EJBRelation.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 EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTION:
				return getDescription();
			case EjbPackage.EJB_RELATIONSHIP_ROLE__ROLE_NAME:
				return getRoleName();
			case EjbPackage.EJB_RELATIONSHIP_ROLE__MULTIPLICITY:
				return getMultiplicity();
			case EjbPackage.EJB_RELATIONSHIP_ROLE__CASCADE_DELETE:
				return isCascadeDelete() ? Boolean.TRUE : Boolean.FALSE;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP:
				return getRelationship();
			case EjbPackage.EJB_RELATIONSHIP_ROLE__SOURCE:
				return getSource();
			case EjbPackage.EJB_RELATIONSHIP_ROLE__CMR_FIELD:
				return getCmrField();
			case EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTIONS:
				return getDescriptions();
		}
		return eDynamicGet(eFeature, resolve);
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public boolean eIsSet(EStructuralFeature eFeature) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTION:
				return DESCRIPTION_EDEFAULT == null ? description != null : !DESCRIPTION_EDEFAULT.equals(description);
			case EjbPackage.EJB_RELATIONSHIP_ROLE__ROLE_NAME:
				return ROLE_NAME_EDEFAULT == null ? roleName != null : !ROLE_NAME_EDEFAULT.equals(roleName);
			case EjbPackage.EJB_RELATIONSHIP_ROLE__MULTIPLICITY:
				return isSetMultiplicity();
			case EjbPackage.EJB_RELATIONSHIP_ROLE__CASCADE_DELETE:
				return isSetCascadeDelete();
			case EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP:
				return getRelationship() != null;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__SOURCE:
				return source != null;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__CMR_FIELD:
				return cmrField != null;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTIONS:
				return descriptions != null && !descriptions.isEmpty();
		}
		return eDynamicIsSet(eFeature);
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public void eSet(EStructuralFeature eFeature, Object newValue) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTION:
				setDescription((String)newValue);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__ROLE_NAME:
				setRoleName((String)newValue);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__MULTIPLICITY:
				setMultiplicity((MultiplicityKind)newValue);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__CASCADE_DELETE:
				setCascadeDelete(((Boolean)newValue).booleanValue());
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP:
				setRelationship((EJBRelation)newValue);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__SOURCE:
				setSource((RoleSource)newValue);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__CMR_FIELD:
				setCmrField((CMRField)newValue);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTIONS:
				getDescriptions().clear();
				getDescriptions().addAll((Collection)newValue);
				return;
		}
		eDynamicSet(eFeature, newValue);
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public void eUnset(EStructuralFeature eFeature) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTION:
				setDescription(DESCRIPTION_EDEFAULT);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__ROLE_NAME:
				setRoleName(ROLE_NAME_EDEFAULT);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__MULTIPLICITY:
				unsetMultiplicity();
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__CASCADE_DELETE:
				unsetCascadeDelete();
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP:
				setRelationship((EJBRelation)null);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__SOURCE:
				setSource((RoleSource)null);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__CMR_FIELD:
				setCmrField((CMRField)null);
				return;
			case EjbPackage.EJB_RELATIONSHIP_ROLE__DESCRIPTIONS:
				getDescriptions().clear();
				return;
		}
		eDynamicUnset(eFeature);
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public String toStringGen() {
		if (eIsProxy()) return super.toString();

		StringBuffer result = new StringBuffer(super.toString());
		result.append(" (description: "); //$NON-NLS-1$
		result.append(description);
		result.append(", roleName: "); //$NON-NLS-1$
		result.append(roleName);
		result.append(", multiplicity: "); //$NON-NLS-1$
		if (multiplicityESet) result.append(multiplicity); else result.append("<unset>"); //$NON-NLS-1$
		result.append(", cascadeDelete: "); //$NON-NLS-1$
		if (cascadeDeleteESet) result.append(cascadeDelete); else result.append("<unset>"); //$NON-NLS-1$
		result.append(')');
		return result.toString();
	}

	/*
	 * @see CommonRelationshipRole#getTypeEntity()
	 */
	public ContainerManagedEntity getTypeEntity() {
		if (getOpposite() != null)
			return getOpposite().getSourceEntity();
		return null;
	}

	/**
	 * @see CommonRelationshipRole#isRequired()
	 */
	public boolean isRequired() {
		if (required!=null)
			return required.booleanValue();
		return isKey();
	}
	
	/**
	 * Set the isRequired flag for bottom up
	 */
	public void setRequired(Boolean isRequired) {
		required = isRequired;
	}

	/**
	 * @generated This field/method will be replaced during code generation.
	 */
	public void setRelationshipGen(EJBRelation newRelationship) {
		if (newRelationship != eContainer || (eContainerFeatureID != EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP && newRelationship != null)) {
			if (EcoreUtil.isAncestor(this, newRelationship))
				throw new IllegalArgumentException("Recursive containment not allowed for " + toString());
			NotificationChain msgs = null;
			if (eContainer != null)
				msgs = eBasicRemoveFromContainer(msgs);
			if (newRelationship != null)
				msgs = ((InternalEObject)newRelationship).eInverseAdd(this, EjbPackage.EJB_RELATION__RELATIONSHIP_ROLES, EJBRelation.class, msgs);
			msgs = eBasicSetContainer((InternalEObject)newRelationship, EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, EjbPackage.EJB_RELATIONSHIP_ROLE__RELATIONSHIP, newRelationship, newRelationship));
	}

	/**
	 * @see org.eclipse.jst.j2ee.internal.ejb.CommonRelationshipRole#setLower(int)
	 */
	public void setLower(int lowerBound) {
		// Do nothing...  Only upperbound is relevant here
	}

	/**
	 * @see org.eclipse.jst.j2ee.internal.ejb.CommonRelationshipRole#setUpper(int)
	 */
	public void setUpper(int upperBound) {
		switch (upperBound) {
			case MultiplicityKind.ONE :
				setMultiplicity(MultiplicityKind.ONE_LITERAL);
				break;
			default :
				setMultiplicity(MultiplicityKind.MANY_LITERAL);
				break;
		}
	}
	
	/**
	  Gets the MOF XMI ref id for this object.
	 */
	private String eGetId() {
		XMIResource res = (XMIResource)eResource();
		if (res == null)
			return null;
		return res.getID(this);
	}

	
	/**
	 * Set and return The id of this element
	 */
	private String eSetId() {


		IDUtil.getOrAssignID(this);

		return eGetId();
	}

}