updates Gaussian

org.sat4j.pb/src/main/java/org/sat4j/pb/GaussPreprocessingPBDecorator.java

@@ -8,6 +8,8 @@ import java.util.ArrayList;
 import java.util.List;
 
 import org.sat4j.core.ConstrGroup;
+import org.sat4j.pb.constraints.pb.PBConstr;
+import org.sat4j.pb.constraints.pb.SubsetSum;
 import org.sat4j.pb.preprocessing.IConstraintGroupSelectionStrategy;
 import org.sat4j.pb.preprocessing.PBPreprocessingConstraint;
 import org.sat4j.pb.preprocessing.PBPreprocessingConstraintGroup;
@@ -24,21 +26,65 @@ public class GaussPreprocessingPBDecorator extends PBSolverDecorator {
     private final List<PBPreprocessingConstraintGroup> groups;
     private IConstraintGroupSelectionStrategy strategy;
 
+    private final SubsetSum subset;
+
+    private static final int MAX_ELEMENT = 100;
+
+    private static final int MAX_SUM = 4000;
+
     public GaussPreprocessingPBDecorator(IPBSolver solver) {
         super(solver);
         this.groups = new ArrayList<>();
+        this.subset = new SubsetSum(MAX_SUM, MAX_ELEMENT);
+    }
+
+    public IConstr updateDegree(IConstr ctr) {
+        if (!(ctr instanceof PBConstr)) {
+            return ctr;
+        }
+        PBConstr pbCtr = (PBConstr) ctr;
+        int[] coeffs = new int[ctr.size()];
+
+        for (int i = 0; i < ctr.size(); i++) {
+            coeffs[i] = (pbCtr.getCoefs()[i].intValue());
+        }
+
+        subset.setElements(coeffs);
+
     }
 
     @Override
-    public IConstr addExactly(IVecInt literals, IVecInt coeffs, int weight)
+    public IConstr addAtMost(IVecInt literals, IVecInt coeffs, int degree)
             throws ContradictionException {
+        PBConstr ctr = super.addAtMost(literals, coeffs, degree);
 
-        return new ConstrGroup();
+    }
+
+    @Override
+    public IConstr addAtMost(IVecInt literals, IVec<BigInteger> coeffs,
+            BigInteger degree) throws ContradictionException {
+        // TODO Auto-generated method stub
+        return super.addAtMost(literals, coeffs, degree);
+    }
+
+    @Override
+    public IConstr addAtLeast(IVecInt literals, IVecInt coeffs, int degree)
+            throws ContradictionException {
+        // TODO Auto-generated method stub
+        return super.addAtLeast(literals, coeffs, degree);
+    }
+
+    @Override
+    public IConstr addAtLeast(IVecInt literals, IVec<BigInteger> coeffs,
+            BigInteger degree) throws ContradictionException {
+        // TODO Auto-generated method stub
+        return super.addAtLeast(literals, coeffs, degree);
     }
 
     @Override
     public IConstr addExactly(IVecInt literals, IVec<BigInteger> coeffs,
             BigInteger weight) throws ContradictionException {
+
         PBPreprocessingConstraint pbCtr = PBPreprocessingConstraint
                 .newInstance(literals, coeffs, weight);
         if (!strategy.add(groups, pbCtr)) {
@@ -49,6 +95,13 @@ public class GaussPreprocessingPBDecorator extends PBSolverDecorator {
         return new ConstrGroup();
     }
 
+    @Override
+    public IConstr addExactly(IVecInt literals, IVecInt coeffs, int weight)
+            throws ContradictionException {
+    
+        return new ConstrGroup();
+    }
+
     @Override
     public void preprocessing() {
         super.preprocessing();