Fixing last sonarqube vulnerabilities.

org.sat4j.pb/src/main/java/org/sat4j/pb/constraints/pb/ConflictMapSwitchToClause.java

@@ -33,7 +33,7 @@ import java.math.BigInteger;
 
 public final class ConflictMapSwitchToClause extends ConflictMap {
 
-    public static int UpperBound;
+    private static int upperBound;
 
     public ConflictMapSwitchToClause(PBConstr cpb, int level) {
         super(cpb, level);
@@ -65,7 +65,7 @@ public final class ConflictMapSwitchToClause extends ConflictMap {
                 bigCoef = bigCoef.add(this.weightedLits.get(wpb.get(i))
                         .multiply(this.coefMult));
             }
-            if (bigCoef.toString().length() > UpperBound) {
+            if (bigCoef.toString().length() > upperBound) {
                 // if we deal with really big integers
                 // reducing the constraint to a clause
                 this.numberOfReductions++;
@@ -90,4 +90,12 @@ public final class ConflictMapSwitchToClause extends ConflictMap {
         return BigInteger.ONE;
     }
 
+    public static int getUpperBound() {
+        return upperBound;
+    }
+
+    public static void setUpperBound(int upperBound) {
+        ConflictMapSwitchToClause.upperBound = upperBound;
+    }
+
 }

org.sat4j.pb/src/main/java/org/sat4j/pb/core/PBSolverCautious.java

@@ -46,13 +46,13 @@ public class PBSolverCautious extends PBSolverCP {
     public PBSolverCautious(LearningStrategy<PBDataStructureFactory> learner,
             PBDataStructureFactory dsf, IOrder order) {
         super(learner, dsf, order);
-        ConflictMapSwitchToClause.UpperBound = BOUND;
+        ConflictMapSwitchToClause.setUpperBound(BOUND);
     }
 
     public PBSolverCautious(LearningStrategy<PBDataStructureFactory> learner,
             PBDataStructureFactory dsf, IOrder order, int bound) {
         super(learner, dsf, order);
-        ConflictMapSwitchToClause.UpperBound = bound;
+        ConflictMapSwitchToClause.setUpperBound(bound);
     }
 
     @Override