org.sat4j.reader
Class DimacsReader

java.lang.Object
  org.sat4j.reader.Reader
      org.sat4j.reader.DimacsReader

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

CardDimacsReader, ExtendedDimacsReader

public class DimacsReader
extends Reader
implements java.io.Serializable

Very simple Dimacs file parser. Allow solvers to read the constraints from a Dimacs formatted file. It should be used that way:

 DimacsReader solver = new DimacsReader(SolverFactory.OneSolver());
 solver.readInstance("mybench.cnf");
 if (solver.isSatisfiable()) {
     // SAT case
 } else {
     // UNSAT case
 }
 

That parser is not used for efficiency reasons. It will be updated with Java 1.5 scanner feature.

Version:

1.0

Author:

dlb, or

See Also:

Serialized Form

Constructor Summary

DimacsReader(ISolver solver)

DimacsReader(ISolver solver, java.lang.String format)

Method Summary

java.lang.String	decode(int[] model) Produce a model using the reader format.
void	decode(int[] model, java.io.PrintWriter out) Produce a model using the reader format on a provided printwriter.
void	disableNumberOfConstraintCheck()
IProblem	parseInstance(java.io.Reader in)

Methods inherited from class org.sat4j.reader.Reader

isVerbose, parseInstance, parseInstance, setVerbosity

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DimacsReader

public DimacsReader(ISolver solver)

DimacsReader

public DimacsReader(ISolver solver,
                    java.lang.String format)

Method Detail

disableNumberOfConstraintCheck

public void disableNumberOfConstraintCheck()

parseInstance

public final IProblem parseInstance(java.io.Reader in)
                             throws ParseFormatException,
                                    ContradictionException,
                                    java.io.IOException

Specified by:

parseInstance in class Reader

Throws:

ParseFormatException

ContradictionException

java.io.IOException

decode

public java.lang.String decode(int[] model)

Description copied from class: Reader

Produce a model using the reader format.

Specified by:

decode in class Reader

Parameters:

model - a model using the Dimacs format.

Returns:

a human readable view of the model.

decode

public void decode(int[] model,
                   java.io.PrintWriter out)

Description copied from class: Reader

Produce a model using the reader format on a provided printwriter.

Specified by:

decode in class Reader

Parameters:

model - a model using the Dimacs format.

out - the place where to display the model