java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/CreateMethodQuickFix.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.daemon.impl.quickfix;
  17
  18 import com.intellij.codeInsight.ExpectedTypeInfo;
  19 import com.intellij.codeInsight.daemon.QuickFixBundle;
  20 import com.intellij.codeInspection.LocalQuickFix;
  21 import com.intellij.codeInspection.ProblemDescriptor;
  22 import com.intellij.openapi.project.Project;
  23 import com.intellij.openapi.util.Pair;
  24 import com.intellij.openapi.vfs.ReadonlyStatusHandler;
  25 import com.intellij.psi.*;
  26 import com.intellij.psi.util.PsiFormatUtil;
  27 import com.intellij.util.Function;
  28 import com.intellij.util.IncorrectOperationException;
  29 import com.intellij.util.containers.ContainerUtil;
  30 import org.jetbrains.annotations.NonNls;
  31 import org.jetbrains.annotations.NotNull;
  32 import org.jetbrains.annotations.Nullable;
  33
  34 import java.util.List;
  35
  36 public class CreateMethodQuickFix implements LocalQuickFix {
  37   protected final PsiClass myTargetClass;
  38   protected final String mySignature;
  39   protected final String myBody;
  40
  41   private CreateMethodQuickFix(final PsiClass targetClass, @NonNls final String signature, @NonNls final String body) {
  42     myTargetClass = targetClass;
  43     mySignature = signature;
  44     myBody = body;
  45   }
  46
  47   @NotNull
  48   public String getName() {
  49
  50     String signature = PsiFormatUtil.formatMethod(createMethod(myTargetClass.getProject()), PsiSubstitutor.EMPTY,
  51                                                   PsiFormatUtil.SHOW_NAME | PsiFormatUtil.SHOW_TYPE | PsiFormatUtil.SHOW_PARAMETERS | PsiFormatUtil.SHOW_RAW_TYPE,
  52                                                   PsiFormatUtil.SHOW_TYPE | PsiFormatUtil.SHOW_RAW_TYPE, 2);
  53     return QuickFixBundle.message("create.method.from.usage.text", signature);
  54   }
  55
  56   @NotNull
  57   public String getFamilyName() {
  58     return QuickFixBundle.message("create.method.from.usage.family");
  59   }
  60
  61   public void applyFix(@NotNull final Project project, @NotNull final ProblemDescriptor descriptor) {
  62     try {
  63       if (ReadonlyStatusHandler.getInstance(project).ensureFilesWritable(myTargetClass.getContainingFile().getVirtualFile()).hasReadonlyFiles()) return;
  64
  65       PsiMethod method = createMethod(project);
  66       List<Pair<PsiExpression,PsiType>> arguments =
  67         ContainerUtil.map2List(method.getParameterList().getParameters(), new Function<PsiParameter, Pair<PsiExpression, PsiType>>() {
  68           public Pair<PsiExpression, PsiType> fun(PsiParameter psiParameter) {
  69             return Pair.create(null, psiParameter.getType());
  70           }
  71         });
  72
  73       method = (PsiMethod)myTargetClass.add(method);
  74       CreateMethodFromUsageFix.doCreate(myTargetClass, method, arguments, PsiSubstitutor.EMPTY, ExpectedTypeInfo.EMPTY_ARRAY, method);
  75     }
  76     catch (IncorrectOperationException e) {
  77       throw new RuntimeException(e);
  78     }
  79   }
  80
  81   private PsiMethod createMethod(Project project) {
  82     PsiElementFactory elementFactory = JavaPsiFacade.getInstance(project).getElementFactory();
  83     String methodText = mySignature + "{" + myBody + "}";
  84     return elementFactory.createMethodFromText(methodText, null);
  85   }
  86
  87   @Nullable
  88   public static CreateMethodQuickFix createFix(final PsiClass targetClass, @NonNls final String signature, @NonNls final String body) {
  89     CreateMethodQuickFix fix = new CreateMethodQuickFix(targetClass, signature, body);
  90     try {
  91       fix.createMethod(targetClass.getProject());
  92       return fix;
  93     }
  94     catch (IncorrectOperationException e) {
  95       return null;
  96     }
  97   }
  98 }