| /* |
| * 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.containers; |
| |
| import gnu.trove.TIntHashSet; |
| import gnu.trove.TIntIntHashMap; |
| import gnu.trove.TIntObjectHashMap; |
| import com.intellij.util.ArrayUtil; |
| |
| /** |
| * @author max |
| */ |
| public class IntToIntSetMap { |
| private final TIntIntHashMap mySingle; |
| private final TIntObjectHashMap<TIntHashSet> myMulti; |
| |
| |
| public IntToIntSetMap(int initialCapacity, float loadfactor) { |
| mySingle = new TIntIntHashMap(initialCapacity, loadfactor); |
| myMulti = new TIntObjectHashMap<TIntHashSet>(initialCapacity, loadfactor); |
| } |
| |
| public void addOccurence(int key, int value) { |
| if (mySingle.containsKey(key)) { |
| int old = mySingle.get(key); |
| TIntHashSet items = new TIntHashSet(3); |
| items.add(old); |
| items.add(value); |
| mySingle.remove(key); |
| myMulti.put(key, items); |
| return; |
| } |
| final TIntHashSet items = myMulti.get(key); |
| if (items != null) { |
| items.add(value); |
| return; |
| } |
| mySingle.put(key, value); |
| } |
| |
| public void removeOccurence(int key, int value) { |
| if (mySingle.containsKey(key)) { |
| mySingle.remove(key); |
| return; |
| } |
| TIntHashSet items = myMulti.get(key); |
| if (items != null) { |
| items.remove(value); |
| if (items.size() == 1) { |
| mySingle.put(key, items.toArray()[0]); |
| myMulti.remove(key); |
| } |
| } |
| } |
| |
| public int[] get(int key) { |
| if (mySingle.containsKey(key)) { |
| return new int[]{mySingle.get(key)}; |
| } |
| TIntHashSet items = myMulti.get(key); |
| if (items == null) return ArrayUtil.EMPTY_INT_ARRAY; |
| return items.toArray(); |
| } |
| } |