/* Copyright (C) 2003 Univ. of Massachusetts Amherst, Computer Science Dept.
This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit).
http://www.cs.umass.edu/~mccallum/mallet
This software is provided under the terms of the Common Public License,
version 1.0, as published by http://www.opensource.org. For further
information, see the file `LICENSE' included with this distribution. */
package cc.mallet.grmm.inference.gbp;
import java.util.List;
import java.util.Iterator;
import java.util.Collection;
import java.util.Set;
import cc.mallet.grmm.types.Factor;
import cc.mallet.grmm.types.FactorGraph;
import cc.mallet.grmm.types.Variable;
import gnu.trove.THashSet;
/**
* A more space-efficient Region class that doesn't maintain a global factor
* over all assignments to the region.
*
* Created: Jun 3, 2005
*
* @author <A HREF="mailto:casutton@cs.umass.edu>casutton@cs.umass.edu</A>
* @version $Id: FactorizedRegion.java,v 1.1 2007/10/22 21:37:58 mccallum Exp $
*/
public class FactorizedRegion extends Region {
FactorGraph subMdl;
public FactorizedRegion (List factors)
{
super (varsForFactors (factors), factors);
subMdl = new FactorGraph ((Variable[]) vars.toArray (new Variable[0]));
for (Iterator it = factors.iterator (); it.hasNext ();) {
Factor factor = (Factor) it.next ();
subMdl.addFactor (factor);
}
}
private static Collection varsForFactors (List factors)
{
Set vars = new THashSet ();
for (Iterator it = factors.iterator (); it.hasNext ();) {
Factor ptl = (Factor) it.next ();
vars.addAll (ptl.varSet ());
}
return vars;
}
}