/*
* Copyright 2000-2016 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.TIntObjectHashMap;
import gnu.trove.TObjectHashingStrategy;
import gnu.trove.TObjectProcedure;
import org.jetbrains.annotations.NotNull;
public class BiDirectionalEnumerator<T> extends Enumerator<T> {
@NotNull private final TIntObjectHashMap<T> myIntToObjectMap;
public BiDirectionalEnumerator(int expectNumber, @NotNull TObjectHashingStrategy<T> strategy) {
super(expectNumber, strategy);
myIntToObjectMap = new TIntObjectHashMap<T>(expectNumber);
}
@Override
public int enumerateImpl(T object) {
int index = super.enumerateImpl(object);
myIntToObjectMap.put(index, object);
return index;
}
@Override
public void clear() {
super.clear();
myIntToObjectMap.clear();
}
@NotNull
public T getValue(int index) {
T hash = myIntToObjectMap.get(index);
if (hash == null) {
throw new RuntimeException("Can not find value by index " + index);
}
return hash;
}
public void forEachValue(@NotNull TObjectProcedure<T> procedure) {
myIntToObjectMap.forEachValue(procedure);
}
}