java/java-impl/src/com/intellij/ide/hierarchy/JavaHierarchyUtil.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.ide.hierarchy;
  17
  18 import com.intellij.ide.util.treeView.AlphaComparator;
  19 import com.intellij.ide.util.treeView.NodeDescriptor;
  20 import com.intellij.ide.util.treeView.SourceComparator;
  21 import com.intellij.openapi.project.Project;
  22 import com.intellij.psi.PsiClass;
  23 import com.intellij.psi.PsiClassOwner;
  24 import com.intellij.psi.PsiFile;
  25 import org.jetbrains.annotations.Nullable;
  26
  27 import java.util.Comparator;
  28
  29 /**
  30  * @author yole
  31  */
  32 public class JavaHierarchyUtil {
  33   private JavaHierarchyUtil() {
  34   }
  35
  36   @Nullable
  37   public static String getPackageName(final PsiClass psiClass) {
  38     final PsiFile file = psiClass.getContainingFile();
  39     if (file instanceof PsiClassOwner){
  40       return ((PsiClassOwner)file).getPackageName();
  41     }
  42     else{
  43       return null;
  44     }
  45   }
  46
  47   public static Comparator<NodeDescriptor> getComparator(Project project) {
  48     if (HierarchyBrowserManager.getInstance(project).getState().SORT_ALPHABETICALLY) {
  49       return AlphaComparator.INSTANCE;
  50     }
  51     else {
  52       return SourceComparator.INSTANCE;
  53     }
  54   }
  55 }