| /* |
| * 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.refactoring.util; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.psi.*; |
| import com.intellij.psi.search.LocalSearchScope; |
| import com.intellij.psi.search.searches.ReferencesSearch; |
| import com.intellij.util.IncorrectOperationException; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Resolves conflicts with fields in a class, when new local variable is |
| * introduced in code block |
| * @author dsl |
| */ |
| public class FieldConflictsResolver { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.refactoring.util.FieldConflictsResolver"); |
| private final PsiCodeBlock myScope; |
| private final PsiField myField; |
| private final List<PsiReferenceExpression> myReferenceExpressions; |
| private PsiClass myQualifyingClass; |
| |
| public FieldConflictsResolver(String name, PsiCodeBlock scope) { |
| myScope = scope; |
| if (myScope == null) { |
| myField = null; |
| myReferenceExpressions = null; |
| return; |
| } |
| JavaPsiFacade facade = JavaPsiFacade.getInstance(myScope.getProject()); |
| final PsiVariable oldVariable = facade.getResolveHelper().resolveAccessibleReferencedVariable(name, myScope); |
| myField = oldVariable instanceof PsiField ? (PsiField) oldVariable : null; |
| if (!(oldVariable instanceof PsiField)) { |
| myReferenceExpressions = null; |
| return; |
| } |
| myReferenceExpressions = new ArrayList<PsiReferenceExpression>(); |
| for (PsiReference reference : ReferencesSearch.search(myField, new LocalSearchScope(myScope), false)) { |
| final PsiElement element = reference.getElement(); |
| if (element instanceof PsiReferenceExpression) { |
| final PsiReferenceExpression referenceExpression = (PsiReferenceExpression)element; |
| if (referenceExpression.getQualifierExpression() == null) { |
| myReferenceExpressions.add(referenceExpression); |
| } |
| } |
| } |
| if (myField.hasModifierProperty(PsiModifier.STATIC)) { |
| myQualifyingClass = myField.getContainingClass(); |
| } |
| } |
| |
| public PsiExpression fixInitializer(PsiExpression initializer) { |
| if (myField == null) return initializer; |
| final PsiReferenceExpression[] replacedRef = {null}; |
| initializer.accept(new JavaRecursiveElementVisitor() { |
| @Override |
| public void visitReferenceExpression(PsiReferenceExpression expression) { |
| final PsiExpression qualifierExpression = expression.getQualifierExpression(); |
| if (qualifierExpression != null) { |
| qualifierExpression.accept(this); |
| } |
| else { |
| final PsiElement result = expression.resolve(); |
| if (expression.getManager().areElementsEquivalent(result, myField)) { |
| try { |
| replacedRef[0] = RefactoringChangeUtil.qualifyReference(expression, myField, myQualifyingClass); |
| } |
| catch (IncorrectOperationException e) { |
| LOG.error(e); |
| } |
| } |
| } |
| } |
| }); |
| if (!initializer.isValid()) return replacedRef[0]; |
| return initializer; |
| } |
| |
| public void fix() throws IncorrectOperationException { |
| if (myField == null) return; |
| final PsiManager manager = myScope.getManager(); |
| for (PsiReferenceExpression referenceExpression : myReferenceExpressions) { |
| if (!referenceExpression.isValid()) continue; |
| final PsiElement newlyResolved = referenceExpression.resolve(); |
| if (!manager.areElementsEquivalent(newlyResolved, myField)) { |
| RefactoringChangeUtil.qualifyReference(referenceExpression, myField, myQualifyingClass); |
| } |
| } |
| } |
| } |