AssignInstruction.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.intellij.codeInspection.dataFlow.instructions;

import com.intellij.codeInspection.dataFlow.DataFlowRunner;
import com.intellij.codeInspection.dataFlow.DfaInstructionState;
import com.intellij.codeInspection.dataFlow.DfaMemoryState;
import com.intellij.codeInspection.dataFlow.InstructionVisitor;
import com.intellij.codeInspection.dataFlow.value.DfaValue;
import com.intellij.psi.PsiExpression;
import com.intellij.psi.PsiVariable;
import org.jetbrains.annotations.Nullable;

public class AssignInstruction extends Instruction {
  private final PsiExpression myRExpression;
  @Nullable private final DfaValue myAssignedValue;

  public AssignInstruction(PsiExpression RExpression, @Nullable DfaValue assignedValue) {
    myRExpression = RExpression;
    myAssignedValue = assignedValue;
  }

  @Override
  public DfaInstructionState[] accept(DataFlowRunner runner, DfaMemoryState stateBefore, InstructionVisitor visitor) {
    return visitor.visitAssign(this, runner, stateBefore);
  }

  @Nullable
  public PsiExpression getRExpression() {
    return myRExpression;
  }

  public boolean isVariableInitializer() {
    return myRExpression != null && myRExpression.getParent() instanceof PsiVariable;
  }

  @Nullable
  public DfaValue getAssignedValue() {
    return myAssignedValue;
  }

  public String toString() {
    return "ASSIGN";
  }
}