java/java-impl/src/com/intellij/codeInsight/unwrap/JavaAnonymousUnwrapper.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   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.intellij.codeInsight.unwrap;
  17
  18 import com.intellij.codeInsight.CodeInsightBundle;
  19 import com.intellij.psi.*;
  20 import com.intellij.util.IncorrectOperationException;
  21
  22 import java.util.List;
  23
  24 public class JavaAnonymousUnwrapper extends JavaUnwrapper {
  25   public JavaAnonymousUnwrapper() {
  26     super(CodeInsightBundle.message("unwrap.anonymous"));
  27   }
  28
  29   public boolean isApplicableTo(PsiElement e) {
  30     return e instanceof PsiAnonymousClass
  31            && ((PsiAnonymousClass)e).getMethods().length <= 1;
  32   }
  33
  34   @Override
  35   public PsiElement collectAffectedElements(PsiElement e, List<PsiElement> toExtract) {
  36     super.collectAffectedElements(e, toExtract);
  37     return findElementToExtractFrom(e);
  38   }
  39
  40   @Override
  41   protected void doUnwrap(PsiElement element, Context context) throws IncorrectOperationException {
  42     PsiElement from = findElementToExtractFrom(element);
  43
  44     for (PsiMethod m : ((PsiAnonymousClass)element).getMethods()) {
  45       context.extractFromCodeBlock(m.getBody(), from);
  46     }
  47
  48     PsiElement next = from.getNextSibling();
  49     if (next instanceof PsiJavaToken && ((PsiJavaToken)next).getTokenType() == JavaTokenType.SEMICOLON) {
  50       context.deleteExactly(from.getNextSibling());
  51     }
  52     context.deleteExactly(from);
  53   }
  54
  55   private PsiElement findElementToExtractFrom(PsiElement el) {
  56     if (el.getParent() instanceof PsiNewExpression) el = el.getParent();
  57     el = findTopmostParentOfType(el, PsiMethodCallExpression.class);
  58     el = findTopmostParentOfType(el, PsiAssignmentExpression.class);
  59     el = findTopmostParentOfType(el, PsiDeclarationStatement.class);
  60
  61     while (el.getParent() instanceof PsiExpressionStatement) {
  62       el = el.getParent();
  63     }
  64
  65     return el;
  66   }
  67 }