001    /*
002     * Copyright 2010-2015 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    
017    package org.jetbrains.kotlin.util.slicedMap;
018    
019    import org.jetbrains.annotations.NotNull;
020    
021    public interface ReadOnlySlice<K, V> {
022        @NotNull
023        KeyWithSlice<K, V, ? extends ReadOnlySlice<K, V>> getKey();
024    
025        V computeValue(SlicedMap map, K key, V value, boolean valueNotFound);
026    
027        /**
028         * @return a slice that only retrieves the value from the storage and skips any computeValue() calls
029         */
030        ReadOnlySlice<K, V> makeRawValueVersion();
031    }