/******************************************************************************
 * Copyright (c) 2004, 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 Corporation - initial API and implementation 
 ****************************************************************************/

package org.eclipse.gmf.runtime.notation.impl;

import java.util.Collection;

import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.emf.ecore.util.InternalEList;
import org.eclipse.gmf.runtime.notation.Anchor;
import org.eclipse.gmf.runtime.notation.Bendpoints;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Edge</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 *   <li>{@link org.eclipse.gmf.runtime.notation.impl.EdgeImpl#getSource <em>Source</em>}</li>
 *   <li>{@link org.eclipse.gmf.runtime.notation.impl.EdgeImpl#getTarget <em>Target</em>}</li>
 *   <li>{@link org.eclipse.gmf.runtime.notation.impl.EdgeImpl#getBendpoints <em>Bendpoints</em>}</li>
 *   <li>{@link org.eclipse.gmf.runtime.notation.impl.EdgeImpl#getSourceAnchor <em>Source Anchor</em>}</li>
 *   <li>{@link org.eclipse.gmf.runtime.notation.impl.EdgeImpl#getTargetAnchor <em>Target Anchor</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
/*
 * @canBeSeenBy %partners
 */
public class EdgeImpl extends ViewImpl implements Edge {
    /**
	 * The cached value of the '{@link #getSource() <em>Source</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getSource()
	 * @generated
	 * @ordered
	 */
	protected View source;

				/**
	 * The cached value of the '{@link #getTarget() <em>Target</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getTarget()
	 * @generated
	 * @ordered
	 */
	protected View target;

				/**
	 * The cached value of the '{@link #getBendpoints() <em>Bendpoints</em>}' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getBendpoints()
	 * @generated
	 * @ordered
	 */
	protected Bendpoints bendpoints;

				/**
	 * The cached value of the '{@link #getSourceAnchor() <em>Source Anchor</em>}' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getSourceAnchor()
	 * @generated
	 * @ordered
	 */
	protected Anchor sourceAnchor;

				/**
	 * The cached value of the '{@link #getTargetAnchor() <em>Target Anchor</em>}' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getTargetAnchor()
	 * @generated
	 * @ordered
	 */
	protected Anchor targetAnchor;

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

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

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public View getSource() {
		return source;
	}

    /**
     * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
      * @generated Not
     */
	public NotificationChain basicSetSource(View newSource, NotificationChain msgs) {
        if (eContainingFeature() == NotationPackage.eINSTANCE.getDiagram_PersistedEdges()){
            if (newSource!=null && newSource.eContainingFeature() == NotationPackage.eINSTANCE.getView_TransientChildren()){
                EObject container = newSource.eContainer();
                if (container!=null && container instanceof View){
                    View parent = (View)container;
                    parent.persistChildren();
                }
            }
        }
        View oldSource = source;
        source = newSource;
        if (eNotificationRequired()) {
            ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__SOURCE, oldSource, newSource);
            if (msgs == null) msgs = notification; else msgs.add(notification);
        }
        return msgs;
    }
    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setSource(View newSource) {
		if (newSource != source) {
			NotificationChain msgs = null;
			if (source != null)
				msgs = ((InternalEObject)source).eInverseRemove(this, NotationPackage.VIEW__SOURCE_EDGES, View.class, msgs);
			if (newSource != null)
				msgs = ((InternalEObject)newSource).eInverseAdd(this, NotationPackage.VIEW__SOURCE_EDGES, View.class, msgs);
			msgs = basicSetSource(newSource, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__SOURCE, newSource, newSource));
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public View getTarget() {
		return target;
	}

    /**
     * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
     * @generated Not
     */
	public NotificationChain basicSetTarget(View newTarget, NotificationChain msgs) {
        if (eContainingFeature() == NotationPackage.eINSTANCE.getDiagram_PersistedEdges()){
            if (newTarget!=null && newTarget.eContainingFeature() == NotationPackage.eINSTANCE.getView_TransientChildren()){
                EObject container = newTarget.eContainer();
                if (container!=null && container instanceof View){
                    View parent = (View)container;
                    parent.persistChildren();
                }
            }
        }
        View oldTarget = target;
        target = newTarget;
        if (eNotificationRequired()) {
            ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__TARGET, oldTarget, newTarget);
            if (msgs == null) msgs = notification; else msgs.add(notification);
        }
        return msgs;
    }

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setTarget(View newTarget) {
		if (newTarget != target) {
			NotificationChain msgs = null;
			if (target != null)
				msgs = ((InternalEObject)target).eInverseRemove(this, NotationPackage.VIEW__TARGET_EDGES, View.class, msgs);
			if (newTarget != null)
				msgs = ((InternalEObject)newTarget).eInverseAdd(this, NotationPackage.VIEW__TARGET_EDGES, View.class, msgs);
			msgs = basicSetTarget(newTarget, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__TARGET, newTarget, newTarget));
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Bendpoints getBendpoints() {
		return bendpoints;
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetBendpoints(Bendpoints newBendpoints, NotificationChain msgs) {
		Bendpoints oldBendpoints = bendpoints;
		bendpoints = newBendpoints;
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__BENDPOINTS, oldBendpoints, newBendpoints);
			if (msgs == null) msgs = notification; else msgs.add(notification);
		}
		return msgs;
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setBendpoints(Bendpoints newBendpoints) {
		if (newBendpoints != bendpoints) {
			NotificationChain msgs = null;
			if (bendpoints != null)
				msgs = ((InternalEObject)bendpoints).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - NotationPackage.EDGE__BENDPOINTS, null, msgs);
			if (newBendpoints != null)
				msgs = ((InternalEObject)newBendpoints).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - NotationPackage.EDGE__BENDPOINTS, null, msgs);
			msgs = basicSetBendpoints(newBendpoints, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__BENDPOINTS, newBendpoints, newBendpoints));
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Anchor getSourceAnchor() {
		return sourceAnchor;
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetSourceAnchor(Anchor newSourceAnchor, NotificationChain msgs) {
		Anchor oldSourceAnchor = sourceAnchor;
		sourceAnchor = newSourceAnchor;
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__SOURCE_ANCHOR, oldSourceAnchor, newSourceAnchor);
			if (msgs == null) msgs = notification; else msgs.add(notification);
		}
		return msgs;
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setSourceAnchor(Anchor newSourceAnchor) {
		if (newSourceAnchor != sourceAnchor) {
			NotificationChain msgs = null;
			if (sourceAnchor != null)
				msgs = ((InternalEObject)sourceAnchor).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - NotationPackage.EDGE__SOURCE_ANCHOR, null, msgs);
			if (newSourceAnchor != null)
				msgs = ((InternalEObject)newSourceAnchor).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - NotationPackage.EDGE__SOURCE_ANCHOR, null, msgs);
			msgs = basicSetSourceAnchor(newSourceAnchor, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__SOURCE_ANCHOR, newSourceAnchor, newSourceAnchor));
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Anchor getTargetAnchor() {
		return targetAnchor;
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetTargetAnchor(Anchor newTargetAnchor, NotificationChain msgs) {
		Anchor oldTargetAnchor = targetAnchor;
		targetAnchor = newTargetAnchor;
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__TARGET_ANCHOR, oldTargetAnchor, newTargetAnchor);
			if (msgs == null) msgs = notification; else msgs.add(notification);
		}
		return msgs;
	}

    /**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setTargetAnchor(Anchor newTargetAnchor) {
		if (newTargetAnchor != targetAnchor) {
			NotificationChain msgs = null;
			if (targetAnchor != null)
				msgs = ((InternalEObject)targetAnchor).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - NotationPackage.EDGE__TARGET_ANCHOR, null, msgs);
			if (newTargetAnchor != null)
				msgs = ((InternalEObject)newTargetAnchor).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - NotationPackage.EDGE__TARGET_ANCHOR, null, msgs);
			msgs = basicSetTargetAnchor(newTargetAnchor, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, NotationPackage.EDGE__TARGET_ANCHOR, newTargetAnchor, newTargetAnchor));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
	public Bendpoints createBendpoints(EClass eClass) {
		Bendpoints newBendpoints = (Bendpoints) eClass.getEPackage().getEFactoryInstance().create(eClass);
		setBendpoints(newBendpoints);
		return newBendpoints;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 */
	public Anchor createSourceAnchor(EClass eClass) {
		Anchor newAnchor = (Anchor) eClass.getEPackage().getEFactoryInstance().create(eClass);
		setSourceAnchor(newAnchor);
		return newAnchor;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 */
	public Anchor createTargetAnchor(EClass eClass) {
		Anchor newAnchor = (Anchor) eClass.getEPackage().getEFactoryInstance().create(eClass);
		setTargetAnchor(newAnchor);
		return newAnchor;
	}

    /**
	 * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
	 * @generated
	 */
    public NotificationChain eInverseAdd(InternalEObject otherEnd, int featureID, NotificationChain msgs) {
		switch (featureID) {
			case NotationPackage.EDGE__EANNOTATIONS:
				return ((InternalEList)getEAnnotations()).basicAdd(otherEnd, msgs);
			case NotationPackage.EDGE__SOURCE_EDGES:
				return ((InternalEList)getSourceEdges()).basicAdd(otherEnd, msgs);
			case NotationPackage.EDGE__TARGET_EDGES:
				return ((InternalEList)getTargetEdges()).basicAdd(otherEnd, msgs);
			case NotationPackage.EDGE__SOURCE:
				if (source != null)
					msgs = ((InternalEObject)source).eInverseRemove(this, NotationPackage.VIEW__SOURCE_EDGES, View.class, msgs);
				return basicSetSource((View)otherEnd, msgs);
			case NotationPackage.EDGE__TARGET:
				if (target != null)
					msgs = ((InternalEObject)target).eInverseRemove(this, NotationPackage.VIEW__TARGET_EDGES, View.class, msgs);
				return basicSetTarget((View)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 NotationPackage.EDGE__EANNOTATIONS:
				return ((InternalEList)getEAnnotations()).basicRemove(otherEnd, msgs);
			case NotationPackage.EDGE__SOURCE_EDGES:
				return ((InternalEList)getSourceEdges()).basicRemove(otherEnd, msgs);
			case NotationPackage.EDGE__TARGET_EDGES:
				return ((InternalEList)getTargetEdges()).basicRemove(otherEnd, msgs);
			case NotationPackage.EDGE__PERSISTED_CHILDREN:
				return ((InternalEList)getPersistedChildren()).basicRemove(otherEnd, msgs);
			case NotationPackage.EDGE__STYLES:
				return ((InternalEList)getStyles()).basicRemove(otherEnd, msgs);
			case NotationPackage.EDGE__TRANSIENT_CHILDREN:
				return ((InternalEList)getTransientChildren()).basicRemove(otherEnd, msgs);
			case NotationPackage.EDGE__SOURCE:
				return basicSetSource(null, msgs);
			case NotationPackage.EDGE__TARGET:
				return basicSetTarget(null, msgs);
			case NotationPackage.EDGE__BENDPOINTS:
				return basicSetBendpoints(null, msgs);
			case NotationPackage.EDGE__SOURCE_ANCHOR:
				return basicSetSourceAnchor(null, msgs);
			case NotationPackage.EDGE__TARGET_ANCHOR:
				return basicSetTargetAnchor(null, msgs);
		}
		return eDynamicInverseRemove(otherEnd, featureID, msgs);
	}

    /**
	 * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
	 * @generated
	 */
    public Object eGet(int featureID, boolean resolve, boolean coreType) {
		switch (featureID) {
			case NotationPackage.EDGE__EANNOTATIONS:
				return getEAnnotations();
			case NotationPackage.EDGE__VISIBLE:
				return isVisible() ? Boolean.TRUE : Boolean.FALSE;
			case NotationPackage.EDGE__TYPE:
				return getType();
			case NotationPackage.EDGE__MUTABLE:
				return isMutable() ? Boolean.TRUE : Boolean.FALSE;
			case NotationPackage.EDGE__SOURCE_EDGES:
				return getSourceEdges();
			case NotationPackage.EDGE__TARGET_EDGES:
				return getTargetEdges();
			case NotationPackage.EDGE__PERSISTED_CHILDREN:
				return getPersistedChildren();
			case NotationPackage.EDGE__STYLES:
				return getStyles();
			case NotationPackage.EDGE__ELEMENT:
				if (resolve) return getElement();
				return basicGetElement();
			case NotationPackage.EDGE__DIAGRAM:
				if (resolve) return getDiagram();
				return basicGetDiagram();
			case NotationPackage.EDGE__TRANSIENT_CHILDREN:
				return getTransientChildren();
			case NotationPackage.EDGE__SOURCE:
				return getSource();
			case NotationPackage.EDGE__TARGET:
				return getTarget();
			case NotationPackage.EDGE__BENDPOINTS:
				return getBendpoints();
			case NotationPackage.EDGE__SOURCE_ANCHOR:
				return getSourceAnchor();
			case NotationPackage.EDGE__TARGET_ANCHOR:
				return getTargetAnchor();
		}
		return eDynamicGet(featureID, resolve, coreType);
	}

    /**
	 * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
	 * @generated
	 */
    public void eSet(int featureID, Object newValue) {
		switch (featureID) {
			case NotationPackage.EDGE__EANNOTATIONS:
				getEAnnotations().clear();
				getEAnnotations().addAll((Collection)newValue);
				return;
			case NotationPackage.EDGE__VISIBLE:
				setVisible(((Boolean)newValue).booleanValue());
				return;
			case NotationPackage.EDGE__TYPE:
				setType((String)newValue);
				return;
			case NotationPackage.EDGE__MUTABLE:
				setMutable(((Boolean)newValue).booleanValue());
				return;
			case NotationPackage.EDGE__SOURCE_EDGES:
				getSourceEdges().clear();
				getSourceEdges().addAll((Collection)newValue);
				return;
			case NotationPackage.EDGE__TARGET_EDGES:
				getTargetEdges().clear();
				getTargetEdges().addAll((Collection)newValue);
				return;
			case NotationPackage.EDGE__PERSISTED_CHILDREN:
				getPersistedChildren().clear();
				getPersistedChildren().addAll((Collection)newValue);
				return;
			case NotationPackage.EDGE__STYLES:
				getStyles().clear();
				getStyles().addAll((Collection)newValue);
				return;
			case NotationPackage.EDGE__ELEMENT:
				setElement((EObject)newValue);
				return;
			case NotationPackage.EDGE__TRANSIENT_CHILDREN:
				getTransientChildren().clear();
				getTransientChildren().addAll((Collection)newValue);
				return;
			case NotationPackage.EDGE__SOURCE:
				setSource((View)newValue);
				return;
			case NotationPackage.EDGE__TARGET:
				setTarget((View)newValue);
				return;
			case NotationPackage.EDGE__BENDPOINTS:
				setBendpoints((Bendpoints)newValue);
				return;
			case NotationPackage.EDGE__SOURCE_ANCHOR:
				setSourceAnchor((Anchor)newValue);
				return;
			case NotationPackage.EDGE__TARGET_ANCHOR:
				setTargetAnchor((Anchor)newValue);
				return;
		}
		eDynamicSet(featureID, newValue);
	}

    /**
	 * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
	 * @generated
	 */
    public void eUnset(int featureID) {
		switch (featureID) {
			case NotationPackage.EDGE__EANNOTATIONS:
				getEAnnotations().clear();
				return;
			case NotationPackage.EDGE__VISIBLE:
				setVisible(VISIBLE_EDEFAULT);
				return;
			case NotationPackage.EDGE__TYPE:
				setType(TYPE_EDEFAULT);
				return;
			case NotationPackage.EDGE__MUTABLE:
				setMutable(MUTABLE_EDEFAULT);
				return;
			case NotationPackage.EDGE__SOURCE_EDGES:
				getSourceEdges().clear();
				return;
			case NotationPackage.EDGE__TARGET_EDGES:
				getTargetEdges().clear();
				return;
			case NotationPackage.EDGE__PERSISTED_CHILDREN:
				getPersistedChildren().clear();
				return;
			case NotationPackage.EDGE__STYLES:
				getStyles().clear();
				return;
			case NotationPackage.EDGE__ELEMENT:
				unsetElement();
				return;
			case NotationPackage.EDGE__TRANSIENT_CHILDREN:
				getTransientChildren().clear();
				return;
			case NotationPackage.EDGE__SOURCE:
				setSource((View)null);
				return;
			case NotationPackage.EDGE__TARGET:
				setTarget((View)null);
				return;
			case NotationPackage.EDGE__BENDPOINTS:
				setBendpoints((Bendpoints)null);
				return;
			case NotationPackage.EDGE__SOURCE_ANCHOR:
				setSourceAnchor((Anchor)null);
				return;
			case NotationPackage.EDGE__TARGET_ANCHOR:
				setTargetAnchor((Anchor)null);
				return;
		}
		eDynamicUnset(featureID);
	}

    /**
	 * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
	 * @generated
	 */
    public boolean eIsSet(int featureID) {
		switch (featureID) {
			case NotationPackage.EDGE__EANNOTATIONS:
				return eAnnotations != null && !eAnnotations.isEmpty();
			case NotationPackage.EDGE__VISIBLE:
				return ((eFlags & VISIBLE_EFLAG) != 0) != VISIBLE_EDEFAULT;
			case NotationPackage.EDGE__TYPE:
				return TYPE_EDEFAULT == null ? type != null : !TYPE_EDEFAULT.equals(type);
			case NotationPackage.EDGE__MUTABLE:
				return ((eFlags & MUTABLE_EFLAG) != 0) != MUTABLE_EDEFAULT;
			case NotationPackage.EDGE__SOURCE_EDGES:
				return sourceEdges != null && !sourceEdges.isEmpty();
			case NotationPackage.EDGE__TARGET_EDGES:
				return targetEdges != null && !targetEdges.isEmpty();
			case NotationPackage.EDGE__PERSISTED_CHILDREN:
				return persistedChildren != null && !persistedChildren.isEmpty();
			case NotationPackage.EDGE__STYLES:
				return styles != null && !styles.isEmpty();
			case NotationPackage.EDGE__ELEMENT:
				return isSetElement();
			case NotationPackage.EDGE__DIAGRAM:
				return basicGetDiagram() != null;
			case NotationPackage.EDGE__TRANSIENT_CHILDREN:
				return transientChildren != null && !transientChildren.isEmpty();
			case NotationPackage.EDGE__SOURCE:
				return source != null;
			case NotationPackage.EDGE__TARGET:
				return target != null;
			case NotationPackage.EDGE__BENDPOINTS:
				return bendpoints != null;
			case NotationPackage.EDGE__SOURCE_ANCHOR:
				return sourceAnchor != null;
			case NotationPackage.EDGE__TARGET_ANCHOR:
				return targetAnchor != null;
		}
		return eDynamicIsSet(featureID);
	}

} //EdgeImpl