plugins/InspectionGadgets/src/com/siyeh/ig/psiutils/VariableReturnedVisitor.java

   1 /*
   2  * Copyright 2003-2005 Dave Griffith
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.siyeh.ig.psiutils;
  17
  18 import com.intellij.psi.JavaRecursiveElementVisitor;
  19 import com.intellij.psi.PsiExpression;
  20 import com.intellij.psi.PsiReturnStatement;
  21 import com.intellij.psi.PsiVariable;
  22 import org.jetbrains.annotations.NotNull;
  23
  24 public class VariableReturnedVisitor extends JavaRecursiveElementVisitor {
  25
  26     private boolean returned = false;
  27     @NotNull private final PsiVariable variable;
  28
  29     public VariableReturnedVisitor(@NotNull PsiVariable variable) {
  30         super();
  31         this.variable = variable;
  32     }
  33
  34     @Override public void visitReturnStatement(
  35             @NotNull PsiReturnStatement returnStatement) {
  36         if(returned){
  37             return;
  38         }
  39         super.visitReturnStatement(returnStatement);
  40         final PsiExpression returnValue = returnStatement.getReturnValue();
  41         if(VariableAccessUtils.mayEvaluateToVariable(returnValue, variable)) {
  42             returned = true;
  43         }
  44     }
  45
  46     public boolean isReturned() {
  47         return returned;
  48     }
  49 }