blob: 9c07bc3e5e1c677f0ce1b1635f3f477dae114160 [file] [log] [blame]
package org.apache.lucene.codecs.lucene42;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
import java.io.IOException;
import org.apache.lucene.codecs.DocValuesConsumer;
import org.apache.lucene.codecs.DocValuesProducer;
import org.apache.lucene.codecs.NormsFormat;
import org.apache.lucene.index.SegmentReadState;
import org.apache.lucene.index.SegmentWriteState;
import org.apache.lucene.util.packed.PackedInts;
/**
* Lucene 4.2 score normalization format.
* <p>
* NOTE: this uses the same format as {@link Lucene42DocValuesFormat}
* Numeric DocValues, but with different file extensions, and passing
* {@link PackedInts#FASTEST} for uncompressed encoding: trading off
* space for performance.
* <p>
* Files:
* <ul>
* <li><tt>.nvd</tt>: DocValues data</li>
* <li><tt>.nvm</tt>: DocValues metadata</li>
* </ul>
* @see Lucene42DocValuesFormat
*/
public final class Lucene42NormsFormat extends NormsFormat {
/** Sole constructor */
public Lucene42NormsFormat() {}
@Override
public DocValuesConsumer normsConsumer(SegmentWriteState state) throws IOException {
// note: we choose FASTEST here (otherwise our norms are half as big but 15% slower than previous lucene)
return new Lucene42DocValuesConsumer(state, DATA_CODEC, DATA_EXTENSION, METADATA_CODEC, METADATA_EXTENSION, PackedInts.FASTEST);
}
@Override
public DocValuesProducer normsProducer(SegmentReadState state) throws IOException {
return new Lucene42DocValuesProducer(state, DATA_CODEC, DATA_EXTENSION, METADATA_CODEC, METADATA_EXTENSION);
}
private static final String DATA_CODEC = "Lucene41NormsData";
private static final String DATA_EXTENSION = "nvd";
private static final String METADATA_CODEC = "Lucene41NormsMetadata";
private static final String METADATA_EXTENSION = "nvm";
}