| /* |
| * Copyright 2000-2014 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.ide.structureView.impl.java; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.Comparator; |
| |
| public class VisibilityComparator implements Comparator { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.ide.structureView.impl.java.VisibilityComparator"); |
| private static final int GROUP_ACCESS_SUBLEVEL = 1; |
| public static Comparator IMSTANCE = new VisibilityComparator(null); |
| |
| private final Comparator myNextComparator; |
| private static final int UNKNOWN_ACCESS_LEVEL = -1; |
| |
| public VisibilityComparator(Comparator comparator) { |
| myNextComparator = comparator; |
| } |
| |
| @Override |
| public int compare(@NotNull Object descriptor1, @NotNull Object descriptor2) { |
| int accessLevel1 = getAccessLevel(descriptor1); |
| int accessLevel2 = getAccessLevel(descriptor2); |
| if (accessLevel1 == accessLevel2 && myNextComparator != null) { |
| return myNextComparator.compare(descriptor1, descriptor2); |
| } |
| return accessLevel2 - accessLevel1; |
| } |
| |
| private static int getAccessLevel(@NotNull Object element) { |
| if (element instanceof AccessLevelProvider) { |
| return ((AccessLevelProvider)element).getAccessLevel() * (GROUP_ACCESS_SUBLEVEL + 1) + ((AccessLevelProvider)element).getSubLevel(); |
| } |
| else { |
| LOG.error(element.getClass().getName()); |
| return UNKNOWN_ACCESS_LEVEL; |
| } |
| } |
| } |