| /* |
| * Copyright 2000-2011 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.util.indexing; |
| |
| import com.intellij.openapi.editor.Document; |
| import com.intellij.openapi.util.Key; |
| import com.intellij.openapi.util.UserDataHolderEx; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * @author Dmitry Avdeev |
| * @author peter |
| */ |
| public class PerIndexDocumentVersionMap { |
| private volatile int mapVersion; |
| private static class IdVersionInfo { |
| private final ID<?,?> id; |
| private int mapVersion; |
| private long docVersion; |
| |
| private IdVersionInfo(@NotNull ID<?, ?> id, long docVersion, int mapVersion) { |
| this.docVersion = docVersion; |
| this.mapVersion = mapVersion; |
| this.id = id; |
| } |
| } |
| |
| private static final Key<List<IdVersionInfo>> KEY = Key.create("UnsavedDocIdVersionInfo"); |
| public long getAndSet(@NotNull Document document, @NotNull ID<?, ?> indexId, long value) { |
| List<IdVersionInfo> list = document.getUserData(KEY); |
| if (list == null) { |
| list = ((UserDataHolderEx)document).putUserDataIfAbsent(KEY, new ArrayList<IdVersionInfo>()); |
| } |
| |
| synchronized (list) { |
| for (IdVersionInfo info : list) { |
| if (info.id == indexId) { |
| long old = info.docVersion; |
| if (info.mapVersion != mapVersion) { |
| old = 0; |
| info.mapVersion = mapVersion; |
| } |
| info.docVersion = value; |
| return old; |
| } |
| } |
| list.add(new IdVersionInfo(indexId, value, mapVersion)); |
| return 0; |
| } |
| } |
| |
| public void clear() { |
| mapVersion++; |
| } |
| } |