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/*******************************************************************************
* <copyright>
*
* Copyright (c) 2012 SAP AG 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:
* Petya Sabeva - initial API, implementation and documentation
*
* </copyright>
*
*******************************************************************************/
package org.eclipse.jpt.jpadiagrameditor.ui.internal.relations;
import java.util.Hashtable;
import org.eclipse.graphiti.mm.pictograms.Anchor;
import org.eclipse.graphiti.mm.pictograms.Connection;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.jpt.jpa.core.context.PersistentAttribute;
import org.eclipse.jpt.jpa.core.context.PersistentType;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.provider.IJPAEditorFeatureProvider;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.util.JPAEditorConstants;
public abstract class HasReferanceRelation {
protected final static String SEPARATOR = ";hasReference;"; //$NON-NLS-1$
protected PersistentType embeddingEntity;
protected PersistentType embeddable;
public final static Hashtable<HasReferenceType, String> relTypeToIdPart = new Hashtable<HasReferenceType, String>();
private PersistentAttribute embeddedAnnotatedAttribute;
public static enum HasReferenceType {
SINGLE, COLLECTION
}
static {
relTypeToIdPart.put(HasReferenceType.SINGLE, "1-1;"); //$NON-NLS-1$
relTypeToIdPart.put(HasReferenceType.COLLECTION, "1-N;"); //$NON-NLS-1$
}
public HasReferanceRelation(PersistentType embeddingEntity,
PersistentType embeddable) {
this.embeddingEntity = embeddingEntity;
this.embeddable = embeddable;
}
public HasReferanceRelation(IJPAEditorFeatureProvider fp, Connection conn) {
Anchor start = conn.getStart();
Anchor end = conn.getEnd();
Object startObj = fp.getBusinessObjectForPictogramElement((ContainerShape)start.eContainer());
Object endObj = fp.getBusinessObjectForPictogramElement((ContainerShape)end.eContainer());
if ((endObj == null) || (startObj == null))
throw new NullPointerException("Some of the connection ends is null"); //$NON-NLS-1$
if (!(endObj instanceof PersistentType) || !(startObj instanceof PersistentType))
throw new IllegalArgumentException();
this.embeddingEntity = (PersistentType)startObj;
this.embeddable = (PersistentType)endObj;
}
public PersistentType getEmbeddable() {
return embeddable;
}
public PersistentType getEmbeddingEntity() {
return embeddingEntity;
}
public String getId() {
return generateId(embeddingEntity, embeddable, embeddedAnnotatedAttribute.getName(), getReferenceType());
}
public static String generateId(PersistentType startJpt, PersistentType endJpt, String embeddedAttributeName, HasReferenceType relType) {
return JPAEditorConstants.HAS_REFERENCE_RELATION_ID_PREFIX +
startJpt.getName() + SEPARATOR + relTypeToIdPart.get(relType) + endJpt.getName()+ "-" + embeddedAttributeName; //$NON-NLS-1$
}
@Override
public boolean equals(Object otherRel) {
if (!HasReferanceRelation.class.isInstance(otherRel))
return false;
return getId().equals(((HasReferanceRelation)otherRel).getId());
}
@Override
public int hashCode() {
return getId().hashCode();
}
public abstract HasReferenceType getReferenceType();
public PersistentAttribute getEmbeddedAnnotatedAttribute() {
return embeddedAnnotatedAttribute;
}
public void setEmbeddedAnnotatedAttribute(PersistentAttribute embeddedAnnotatedAttribute) {
this.embeddedAnnotatedAttribute = embeddedAnnotatedAttribute;
}
}
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