| /* |
| * Copyright 2003-2005 Dave Griffith |
| * |
| * 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.siyeh.ig.errorhandling; |
| |
| import com.intellij.psi.JavaRecursiveElementVisitor; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiParameter; |
| import com.intellij.psi.PsiReferenceExpression; |
| import org.jetbrains.annotations.NotNull; |
| |
| class CatchParameterUsedVisitor extends JavaRecursiveElementVisitor { |
| |
| private final PsiParameter parameter; |
| private boolean used = false; |
| |
| CatchParameterUsedVisitor(PsiParameter variable) { |
| super(); |
| parameter = variable; |
| } |
| |
| @Override |
| public void visitElement(@NotNull PsiElement element) { |
| if (!used) { |
| super.visitElement(element); |
| } |
| } |
| |
| @Override |
| public void visitReferenceExpression( |
| @NotNull PsiReferenceExpression reference) { |
| if (used) { |
| return; |
| } |
| super.visitReferenceExpression(reference); |
| final PsiElement element = reference.resolve(); |
| if (parameter.equals(element)) { |
| used = true; |
| } |
| } |
| |
| public boolean isUsed() { |
| return used; |
| } |
| } |