org.sonar.javascript.se.points.IdentifierProgramPoint 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.points;
import java.util.Optional;
import org.sonar.javascript.se.ProgramState;
import org.sonar.javascript.se.SymbolicExecution;
import org.sonar.javascript.se.sv.SymbolicValue;
import org.sonar.javascript.se.sv.UnknownSymbolicValue;
import org.sonar.plugins.javascript.api.tree.Tree;
import org.sonar.plugins.javascript.api.tree.Tree.Kind;
import org.sonar.plugins.javascript.api.tree.expression.IdentifierTree;
public class IdentifierProgramPoint implements ProgramPoint {
private IdentifierTree identifier;
private SymbolicExecution execution;
public IdentifierProgramPoint(Tree tree, SymbolicExecution execution) {
this.identifier = (IdentifierTree) tree;
this.execution = execution;
}
@Override
public Optional execute(ProgramState state) {
SymbolicValue symbolicValue = state.getSymbolicValue(identifier, execution);
if (symbolicValue == null) {
symbolicValue = UnknownSymbolicValue.UNKNOWN;
}
return Optional.of(state.pushToStack(symbolicValue));
}
public static boolean originatesFrom(Tree element) {
return element.is(Kind.IDENTIFIER_REFERENCE) && !LiteralProgramPoint.isUndefined(element);
}
}