org.hibernate.envers.configuration.internal.PersistentClassGraphDefiner Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, 2013, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
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*/
package org.hibernate.envers.configuration.internal;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.hibernate.cfg.Configuration;
import org.hibernate.envers.internal.tools.Tools;
import org.hibernate.envers.internal.tools.graph.GraphDefiner;
import org.hibernate.mapping.PersistentClass;
/**
* Defines a graph, where the vertexes are all persistent classes, and there is an edge from
* p.c. A to p.c. B iff A is a superclass of B.
*
* @author Adam Warski (adam at warski dot org)
*/
public class PersistentClassGraphDefiner implements GraphDefiner {
private Configuration cfg;
public PersistentClassGraphDefiner(Configuration cfg) {
this.cfg = cfg;
}
@Override
public String getRepresentation(PersistentClass pc) {
return pc.getEntityName();
}
@Override
public PersistentClass getValue(String entityName) {
return cfg.getClassMapping( entityName );
}
@SuppressWarnings({"unchecked"})
private void addNeighbours(List neighbours, Iterator subclassIterator) {
while ( subclassIterator.hasNext() ) {
final PersistentClass subclass = subclassIterator.next();
neighbours.add( subclass );
addNeighbours( neighbours, (Iterator) subclass.getSubclassIterator() );
}
}
@Override
@SuppressWarnings({"unchecked"})
public List getNeighbours(PersistentClass pc) {
final List neighbours = new ArrayList();
addNeighbours( neighbours, (Iterator) pc.getSubclassIterator() );
return neighbours;
}
@Override
@SuppressWarnings({"unchecked"})
public List getValues() {
return Tools.iteratorToList( cfg.getClassMappings() );
}
}