org.sonar.javascript.se.sv.LogicalNotSymbolicValue Maven / Gradle / Ivy
/*
* SonarQube JavaScript Plugin
* Copyright (C) 2011-2018 SonarSource SA
* mailto:info 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.javascript.se.sv;
import com.google.common.base.Preconditions;
import java.util.Optional;
import org.sonar.javascript.se.Constraint;
import org.sonar.javascript.se.ProgramState;
public class LogicalNotSymbolicValue implements SymbolicValue {
private final SymbolicValue negatedValue;
private LogicalNotSymbolicValue(SymbolicValue negatedValue) {
Preconditions.checkArgument(negatedValue != null, "negatedValue should not be null");
this.negatedValue = negatedValue;
}
public static SymbolicValue create(SymbolicValue negatedValue) {
return new LogicalNotSymbolicValue(negatedValue);
}
@Override
public Optional constrainDependencies(ProgramState state, Constraint constraint) {
if (constraint.isStricterOrEqualTo(Constraint.TRUTHY)) {
return state.constrain(negatedValue, Constraint.FALSY);
} else if (constraint.isStricterOrEqualTo(Constraint.FALSY)) {
return state.constrain(negatedValue, Constraint.TRUTHY);
} else {
return Optional.of(state);
}
}
@Override
public Constraint baseConstraint(ProgramState state) {
Constraint negatedConstraint = state.getConstraint(negatedValue);
if (negatedConstraint.isStricterOrEqualTo(Constraint.TRUTHY)) {
return Constraint.FALSE;
}
if (negatedConstraint.isStricterOrEqualTo(Constraint.FALSY)) {
return Constraint.TRUE;
}
return Constraint.BOOLEAN_PRIMITIVE;
}
public SymbolicValue negatedValue() {
return negatedValue;
}
@Override
public String toString() {
return "!" + negatedValue;
}
}