/*
* #!
* Ontopia Vizigator
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* !#
*/
package net.ontopia.topicmaps.viz;
import net.ontopia.topicmaps.core.AssociationIF;
import net.ontopia.topicmaps.core.TopicIF;
public class CreateTMAssociationEdge implements EdgeRecoveryObjectIF {
private AssociationIF association;
// Use with care and keep private. Only for temporary internal storage!
private TMAssociationEdge lastEdge;
public CreateTMAssociationEdge(AssociationIF association,
TopicIF scopingTopic) {
this.association = association;
}
public void execute(TopicMapView view) {
// One can rely on view.makeAssociation creating a TMAssociationEdge, since
// the associationargument must necessarily be binary. Otherwise, an error
// has been made in constructing this CreateTMassociationEdge.
lastEdge = view.getEdge(association);
if (lastEdge == null)
lastEdge = (TMAssociationEdge)view
.makeAssociation(association, null, true);
}
public TMAbstractEdge recoverEdge(TopicMapView view) {
execute(view);
return lastEdge;
}
}