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/*******************************************************************************
* <copyright>
*
* Copyright (c) 2005, 2010 SAP AG.
* 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:
* Stefan Dimov - initial API, implementation and documentation
*
* </copyright>
*
*******************************************************************************/
package org.eclipse.jpt.jpadiagrameditor.ui.internal.feature;
import java.util.Iterator;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.transaction.RecordingCommand;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.transaction.util.TransactionUtil;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.IRemoveFeature;
import org.eclipse.graphiti.features.context.IContext;
import org.eclipse.graphiti.features.context.IRemoveContext;
import org.eclipse.graphiti.features.context.impl.RemoveContext;
import org.eclipse.graphiti.features.impl.AbstractFeature;
import org.eclipse.graphiti.internal.Messages;
import org.eclipse.graphiti.mm.pictograms.Anchor;
import org.eclipse.graphiti.mm.pictograms.Connection;
import org.eclipse.graphiti.mm.pictograms.ConnectionDecorator;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;
import org.eclipse.graphiti.mm.pictograms.Shape;
import org.eclipse.graphiti.services.Graphiti;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.provider.IJPAEditorFeatureProvider;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.relations.AbstractRelation;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.relations.HasReferanceRelation;
@SuppressWarnings("restriction")
public class RemoveRelationFeature extends AbstractFeature implements IRemoveFeature {
private static final String NAME = Messages.DefaultRemoveFeature_0_xfld;
public RemoveRelationFeature(IFeatureProvider fp) {
super(fp);
}
public boolean isAvailable(IContext context) {
return true;
}
public boolean canRemove(IRemoveContext context) {
return true;
}
public boolean canExecute(IContext context) {
return true;
}
public void preRemove(IRemoveContext context) {
PictogramElement pe = context.getPictogramElement();
Object bo = getFeatureProvider().getBusinessObjectForPictogramElement(pe);
if (bo instanceof AbstractRelation) {
AbstractRelation rel = (AbstractRelation)bo;
getFeatureProvider().remove(rel.getId());
} else if (bo instanceof HasReferanceRelation) {
HasReferanceRelation rel = (HasReferanceRelation) bo;
getFeatureProvider().remove(rel.getId());
}
}
public final void remove(final IRemoveContext context) {
if (!getUserDecision()) {
return;
}
preRemove(context);
final PictogramElement pe = context.getPictogramElement();
if (pe == null)
return;
TransactionalEditingDomain ted = TransactionUtil.getEditingDomain(pe);
RecordingCommand rc = new RecordingCommand(ted) {
protected void doExecute() {
if (pe instanceof Shape) {
Shape shape = (Shape) pe;
removeAllConnections(shape);
}
Graphiti.getPeService().deletePictogramElement(pe);
postRemove(context);
}
};
ted.getCommandStack().execute(rc);
}
protected void removeAllConnections(Shape shape) {
IFeatureProvider featureProvider = getFeatureProvider();
for (Iterator<Anchor> iter = shape.getAnchors().iterator(); iter.hasNext();) {
Anchor anchor = iter.next();
for (Iterator<Connection> iterator = Graphiti.getPeService().getAllConnections(anchor).iterator(); iterator.hasNext();) {
Connection connection = iterator.next();
if (connection.eResource() != null) {
IRemoveContext rc = new RemoveContext(connection);
IRemoveFeature removeFeature = featureProvider.getRemoveFeature(rc);
if (removeFeature != null) {
ConnectionDecorator decorators[] = connection.getConnectionDecorators().toArray(new ConnectionDecorator[0]);
for (ConnectionDecorator decorator : decorators) {
if (decorator != null && (decorator.eResource() != null)) {
EcoreUtil.delete(decorator, true);
}
}
removeFeature.remove(rc);
}
}
}
}
}
public void postRemove(IRemoveContext context) {
}
@Override
public String getName() {
return NAME;
}
public IJPAEditorFeatureProvider getFeatureProvider() {
return (IJPAEditorFeatureProvider)super.getFeatureProvider();
}
public void execute(IContext context) {
if (context instanceof IRemoveContext) {
remove((IRemoveContext)context);
}
}
}
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