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    public interface RewritePolicy {
020    
021        RewritePolicy DO_NOTHING = new RewritePolicy() {
022            @Override
023            public <K> boolean rewriteProcessingNeeded(K key) {
024                return false;
025            }
026    
027            @Override
028            public <K, V> boolean processRewrite(WritableSlice<K, V> slice, K key, V oldValue, V newValue) {
029                throw new UnsupportedOperationException();
030            }
031        };
032    
033        <K> boolean rewriteProcessingNeeded(K key);
034    
035        // True to put, false to skip
036        <K, V> boolean processRewrite(WritableSlice<K, V> slice, K key, V oldValue, V newValue);
037    }