| /* |
| * Copyright 2000-2009 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.application.PathManager; |
| import gnu.trove.TIntObjectHashMap; |
| import gnu.trove.TObjectIntHashMap; |
| import gnu.trove.TObjectIntProcedure; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.*; |
| |
| /** |
| * @author Eugene Zhuravlev |
| * Date: Feb 12, 2008 |
| */ |
| public class ID<K, V> { |
| private static final TIntObjectHashMap<ID> ourRegistry = new TIntObjectHashMap<ID>(); |
| private static final TObjectIntHashMap<String> ourNameToIdRegistry = new TObjectIntHashMap<String>(); |
| public static final int MAX_NUMBER_OF_INDICES = Short.MAX_VALUE; |
| |
| private final String myName; |
| private final short myUniqueId; |
| |
| static { |
| final File indices = getEnumFile(); |
| try { |
| final BufferedReader reader = new BufferedReader(new FileReader(indices)); |
| try { |
| int cnt = 0; |
| do { |
| cnt++; |
| final String name = reader.readLine(); |
| if (name == null) break; |
| ourNameToIdRegistry.put(name, cnt); |
| } |
| while (true); |
| } |
| finally { |
| reader.close(); |
| } |
| } |
| catch (IOException e) { |
| ourNameToIdRegistry.clear(); |
| writeEnumFile(); |
| } |
| } |
| |
| private static File getEnumFile() { |
| final File indexFolder = PathManager.getIndexRoot(); |
| return new File(indexFolder, "indices.enum"); |
| } |
| |
| protected ID(String name) { |
| myName = name; |
| myUniqueId = stringToId(name); |
| |
| final ID old = ourRegistry.put(myUniqueId, this); |
| assert old == null; |
| } |
| |
| private static short stringToId(String name) { |
| if (ourNameToIdRegistry.containsKey(name)) { |
| return (short)ourNameToIdRegistry.get(name); |
| } |
| |
| int n = ourNameToIdRegistry.size() + 1; |
| assert n <= MAX_NUMBER_OF_INDICES : "Number of indices exceeded"; |
| |
| ourNameToIdRegistry.put(name, n); |
| |
| writeEnumFile(); |
| |
| return (short)n; |
| } |
| |
| private static void writeEnumFile() { |
| try { |
| final File f = getEnumFile(); |
| final BufferedWriter w = new BufferedWriter(new FileWriter(f)); |
| try { |
| final String[] names = new String[ourNameToIdRegistry.size()]; |
| |
| ourNameToIdRegistry.forEachEntry(new TObjectIntProcedure<String>() { |
| @Override |
| public boolean execute(final String key, final int value) { |
| names[value - 1] = key; |
| return true; |
| } |
| }); |
| |
| for (String name : names) { |
| w.write(name); |
| w.newLine(); |
| } |
| } |
| finally { |
| w.close(); |
| } |
| } |
| catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| public static <K, V> ID<K, V> create(@NonNls String name) { |
| final ID<K, V> found = findByName(name); |
| return found != null ? found : new ID<K, V>(name); |
| } |
| |
| @Nullable |
| public static <K, V> ID<K, V> findByName(@NotNull String name) { |
| return (ID<K, V>)findById(stringToId(name)); |
| } |
| |
| public int hashCode() { |
| return (int)myUniqueId; |
| } |
| |
| public String toString() { |
| return myName; |
| } |
| |
| public int getUniqueId() { |
| return myUniqueId; |
| } |
| |
| public static ID<?, ?> findById(int id) { |
| return ourRegistry.get(id); |
| } |
| } |