001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2011 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.duplications.index;
021    
022    import java.util.Collection;
023    import java.util.Collections;
024    import java.util.List;
025    import java.util.Map;
026    
027    import org.sonar.duplications.block.Block;
028    import org.sonar.duplications.block.ByteArray;
029    
030    import com.google.common.collect.Lists;
031    import com.google.common.collect.Maps;
032    
033    public class MemoryCloneIndex2 extends AbstractCloneIndex {
034    
035      private Map<String, List<Block>> byResource = Maps.newHashMap();
036      private Map<ByteArray, List<Block>> byHash = Maps.newHashMap();
037    
038      public Collection<Block> getByResourceId(String resourceId) {
039        return get(byResource, resourceId);
040      }
041    
042      public Collection<Block> getBySequenceHash(ByteArray sequenceHash) {
043        return get(byHash, sequenceHash);
044      }
045    
046      public void insert(Block block) {
047        put(byResource, block.getResourceId(), block);
048        put(byHash, block.getBlockHash(), block);
049      }
050    
051      private static <T> List<Block> get(Map<T, List<Block>> map, T key) {
052        List<Block> blocks = map.get(key);
053        return blocks != null ? blocks : Collections.EMPTY_LIST;
054      }
055    
056      private static <T> void put(Map<T, List<Block>> map, T key, Block value) {
057        List<Block> blocks = map.get(key);
058        if (blocks == null) {
059          blocks = Lists.newLinkedList();
060          map.put(key, blocks);
061        }
062        blocks.add(value);
063      }
064    
065    }