001/*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.jetbrains.jet.util.slicedmap;
018
019public interface ReadOnlySlice<K, V> {
020    SlicedMapKey<K, V> makeKey(K key);
021
022    V computeValue(SlicedMap map, K key, V value, boolean valueNotFound);
023
024    /**
025     * @return a slice that only retrieves the value from the storage and skips any computeValue() calls
026     */
027    ReadOnlySlice<K, V> makeRawValueVersion();
028}