/*
* SonarQube Java
* Copyright (C) 2012-2016 SonarSource SA
* mailto:contact AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.java.se.symbolicvalues;
import com.google.common.collect.ImmutableList;
import org.sonar.java.se.ProgramState;
import org.sonar.java.se.constraint.BooleanConstraint;
import org.sonar.java.se.constraint.ObjectConstraint;
import org.sonar.java.se.symbolicvalues.SymbolicValue.UnarySymbolicValue;
import java.util.List;
public class NullCheckSymbolicValue extends UnarySymbolicValue {
private boolean isNull;
public NullCheckSymbolicValue(int id, boolean isNull) {
super(id);
this.isNull = isNull;
}
@Override
public List<ProgramState> setConstraint(ProgramState programState, BooleanConstraint booleanConstraint) {
ObjectConstraint constraint = ObjectConstraint.nullConstraint();
if (BooleanConstraint.TRUE.equals(booleanConstraint) ^ isNull) {
constraint = ObjectConstraint.notNull();
}
return ImmutableList.of(programState.addConstraint(operand, constraint));
}
}