java/java-impl/src/com/intellij/refactoring/OptimizeImportsRefactoringHelper.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.refactoring;
  17
  18 import com.intellij.psi.PsiJavaFile;
  19 import com.intellij.psi.PsiElement;
  20 import com.intellij.psi.PsiFile;
  21 import com.intellij.psi.codeStyle.JavaCodeStyleManager;
  22 import com.intellij.usageView.UsageInfo;
  23 import com.intellij.util.containers.HashSet;
  24 import com.intellij.util.IncorrectOperationException;
  25 import com.intellij.openapi.project.Project;
  26 import com.intellij.openapi.diagnostic.Logger;
  27
  28 import java.util.Set;
  29
  30 public class OptimizeImportsRefactoringHelper implements RefactoringHelper<Set<PsiJavaFile>> {
  31   private static final Logger LOG = Logger.getInstance("#com.intellij.refactoring.OptimizeImportsRefactoringHelper");
  32
  33   public Set<PsiJavaFile> prepareOperation(final UsageInfo[] usages) {
  34     Set<PsiJavaFile> javaFiles = new HashSet<PsiJavaFile>();
  35     for (UsageInfo usage : usages) {
  36       final PsiElement element = usage.getElement();
  37       if (element != null) {
  38         final PsiFile file = element.getContainingFile();
  39         if (file instanceof PsiJavaFile) {
  40           javaFiles.add((PsiJavaFile)file);
  41         }
  42       }
  43     }
  44     return javaFiles;
  45   }
  46
  47   public void performOperation(final Project project, final Set<PsiJavaFile> javaFiles) {
  48     final JavaCodeStyleManager styleManager = JavaCodeStyleManager.getInstance(project);
  49     for (PsiJavaFile file : javaFiles) {
  50       try {
  51         if (file.isValid() && file.getVirtualFile() != null) {
  52           styleManager.removeRedundantImports(file);
  53         }
  54       }
  55       catch (IncorrectOperationException e) {
  56         LOG.error(e);
  57       }
  58     }
  59   }
  60 }