| /* |
| * 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.codeInsight.unwrap; |
| |
| import com.intellij.codeInsight.CodeInsightBundle; |
| import com.intellij.psi.*; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.IncorrectOperationException; |
| |
| import java.util.List; |
| |
| public class JavaAnonymousUnwrapper extends JavaUnwrapper { |
| public JavaAnonymousUnwrapper() { |
| super(CodeInsightBundle.message("unwrap.anonymous")); |
| } |
| |
| @Override |
| public boolean isApplicableTo(PsiElement e) { |
| return e instanceof PsiAnonymousClass |
| && ((PsiAnonymousClass)e).getMethods().length <= 1; |
| } |
| |
| @Override |
| public PsiElement collectAffectedElements(PsiElement e, List<PsiElement> toExtract) { |
| super.collectAffectedElements(e, toExtract); |
| return findElementToExtractFrom(e); |
| } |
| |
| @Override |
| protected void doUnwrap(PsiElement element, Context context) throws IncorrectOperationException { |
| PsiElement from = findElementToExtractFrom(element); |
| |
| final PsiMethod[] methods = ((PsiAnonymousClass)element).getMethods(); |
| |
| if (methods.length == 1) { |
| final PsiCodeBlock body = methods[0].getBody(); |
| if (body != null) { |
| final PsiStatement[] statements = body.getStatements(); |
| if (statements.length == 1 && statements[0] instanceof PsiReturnStatement) { |
| final PsiExpression returnValue = ((PsiReturnStatement)statements[0]).getReturnValue(); |
| if (from instanceof PsiDeclarationStatement) { |
| final PsiElement[] declaredElements = ((PsiDeclarationStatement)from).getDeclaredElements(); |
| if (declaredElements.length == 1 && declaredElements[0] instanceof PsiVariable) { |
| context.setInitializer((PsiVariable)declaredElements[0], returnValue); |
| return; |
| } |
| } |
| } |
| } |
| } |
| |
| for (PsiMethod m : methods) { |
| context.extractFromCodeBlock(m.getBody(), from); |
| } |
| |
| PsiElement next = from.getNextSibling(); |
| if (next instanceof PsiJavaToken && ((PsiJavaToken)next).getTokenType() == JavaTokenType.SEMICOLON) { |
| context.deleteExactly(from.getNextSibling()); |
| } |
| context.deleteExactly(from); |
| } |
| |
| private static PsiElement findElementToExtractFrom(PsiElement el) { |
| if (el.getParent() instanceof PsiNewExpression) el = el.getParent(); |
| el = findTopmostParentOfType(el, PsiMethodCallExpression.class); |
| el = findTopmostParentOfType(el, PsiAssignmentExpression.class); |
| el = findTopmostParentOfType(el, PsiDeclarationStatement.class); |
| |
| PsiElement parent = el.getParent(); |
| while (parent instanceof PsiExpressionStatement || parent instanceof PsiReturnStatement) { |
| el = parent; |
| parent = el.getParent(); |
| } |
| |
| return el; |
| } |
| |
| private static PsiElement findTopmostParentOfType(PsiElement el, Class<? extends PsiElement> clazz) { |
| while (true) { |
| @SuppressWarnings({"unchecked"}) |
| PsiElement temp = PsiTreeUtil.getParentOfType(el, clazz, true, PsiAnonymousClass.class); |
| if (temp == null || temp instanceof PsiFile) return el; |
| el = temp; |
| } |
| } |
| } |