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

   1 /*
   2  * Copyright 2003-2006 Dave Griffith, Bas Leijdekkers
   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.*;
  19 import org.jetbrains.annotations.NotNull;
  20
  21 public class VariablePassedAsArgumentVisitor extends JavaRecursiveElementVisitor{
  22
  23     @NotNull
  24     private final PsiVariable variable;
  25     private boolean passed = false;
  26
  27     public VariablePassedAsArgumentVisitor(@NotNull PsiVariable variable){
  28         super();
  29         this.variable = variable;
  30     }
  31
  32     @Override public void visitElement(@NotNull PsiElement element){
  33         if(!passed){
  34             super.visitElement(element);
  35         }
  36     }
  37
  38     @Override public void visitMethodCallExpression(@NotNull PsiMethodCallExpression call){
  39         if(passed){
  40             return;
  41         }
  42         super.visitMethodCallExpression(call);
  43         final PsiExpressionList argumentList = call.getArgumentList();
  44         final PsiExpression[] arguments = argumentList.getExpressions();
  45         for(final PsiExpression argument : arguments){
  46             if(VariableAccessUtils.mayEvaluateToVariable(argument, variable)){
  47                 passed = true;
  48             }
  49         }
  50     }
  51
  52     @Override public void visitNewExpression(@NotNull PsiNewExpression newExpression){
  53         if(passed){
  54             return;
  55         }
  56         super.visitNewExpression(newExpression);
  57         final PsiExpressionList argumentList = newExpression.getArgumentList();
  58         if(argumentList == null){
  59             return;
  60         }
  61         final PsiExpression[] arguments = argumentList.getExpressions();
  62         for(final PsiExpression argument : arguments){
  63             if(VariableAccessUtils.mayEvaluateToVariable(argument, variable)){
  64                 passed = true;
  65             }
  66         }
  67     }
  68
  69     public boolean isPassed(){
  70         return passed;
  71     }
  72 }