org.sat4j.pb.tools.ConflictTracing Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of org.sat4j.pb Show documentation
The pb library contains algorithms for solving pseudo boolean optimization problems.
The newest version!
/*******************************************************************************
 * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2008 Daniel Le Berre
 *
 * 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
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU Lesser General Public License Version 2.1 or later (the
 * "LGPL"), in which case the provisions of the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of the LGPL, and not to allow others to use your version of
 * this file under the terms of the EPL, indicate your decision by deleting
 * the provisions above and replace them with the notice and other provisions
 * required by the LGPL. If you do not delete the provisions above, a recipient
 * may use your version of this file under the terms of the EPL or the LGPL.
 * 
 * Based on the pseudo boolean algorithms described in:
 * A fast pseudo-Boolean constraint solver Chai, D.; Kuehlmann, A.
 * Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on
 * Volume 24, Issue 3, March 2005 Page(s): 305 - 317
 * 
 * and 
 * Heidi E. Dixon, 2004. Automating Pseudo-Boolean Inference within a DPLL 
 * Framework. Ph.D. Dissertation, University of Oregon.
 *******************************************************************************/
package org.sat4j.pb.tools;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;

import org.sat4j.pb.constraints.pb.PBConstr;
import org.sat4j.specs.IConstr;
import org.sat4j.specs.Lbool;
import org.sat4j.specs.SearchListener;

public class ConflictTracing implements SearchListener {

	private static final long serialVersionUID = 1L;

	private final String filename;
	private PrintStream out;
	private long index = 1;

	public ConflictTracing(String filename) {
		this.filename = filename;
		updateWriter();
	}

	private void updateWriter() {
		try {
			out = new PrintStream(new FileOutputStream(filename + ".dat"));
		} catch (FileNotFoundException e) {
			out = System.out;
		}
	}

	public void adding(int p) {
		// TODO Auto-generated method stub

	}

	public void assuming(int p) {
		// TODO Auto-generated method stub

	}

	public void backjump(int backjumpLevel) {
		// TODO Auto-generated method stub

	}

	public void backtracking(int p) {
		// TODO Auto-generated method stub

	}

	public void beginLoop() {
		// TODO Auto-generated method stub

	}

	public void conflictFound(IConstr confl, int dlevel, int trailLevel) {
		// TODO Auto-generated method stub

	}

	public void conflictFound(int p) {
		// TODO Auto-generated method stub

	}

	public void delete(int[] clause) {
		// TODO Auto-generated method stub

	}

	public void end(Lbool result) {
		out.close();
	}

	public void learn(IConstr c) {
		PBConstr myConstr = (PBConstr) c;
		if (myConstr.size() > 0) {
			out.printf("%d %d %d\n", index++, myConstr.getCoef(0), myConstr
					.size());
		}
	}

	public void propagating(int p, IConstr reason) {
		// TODO Auto-generated method stub

	}

	public void restarting() {
		// TODO Auto-generated method stub

	}

	public void solutionFound() {
		// TODO Auto-generated method stub

	}

	public void start() {
		// TODO Auto-generated method stub

	}

}