org.apache.lucene.codecs.lucene70.Lucene70Codec.java Source code

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Here is the source code for org.apache.lucene.codecs.lucene70.Lucene70Codec.java

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/*
 * 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.
 */
package org.apache.lucene.codecs.lucene70;

import org.apache.lucene.codecs.Codec;
import org.apache.lucene.codecs.CompoundFormat;
import org.apache.lucene.codecs.DocValuesFormat;
import org.apache.lucene.codecs.FieldInfosFormat;
import org.apache.lucene.codecs.FilterCodec;
import org.apache.lucene.codecs.LiveDocsFormat;
import org.apache.lucene.codecs.NormsFormat;
import org.apache.lucene.codecs.PointsFormat;
import org.apache.lucene.codecs.PostingsFormat;
import org.apache.lucene.codecs.SegmentInfoFormat;
import org.apache.lucene.codecs.StoredFieldsFormat;
import org.apache.lucene.codecs.TermVectorsFormat;
import org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat;
import org.apache.lucene.codecs.lucene50.Lucene50LiveDocsFormat;
import org.apache.lucene.codecs.lucene50.Lucene50StoredFieldsFormat;
import org.apache.lucene.codecs.lucene50.Lucene50StoredFieldsFormat.Mode;
import org.apache.lucene.codecs.lucene50.Lucene50TermVectorsFormat;
import org.apache.lucene.codecs.lucene60.Lucene60FieldInfosFormat;
import org.apache.lucene.codecs.lucene60.Lucene60PointsFormat;
import org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat;
import org.apache.lucene.codecs.perfield.PerFieldPostingsFormat;

/**
 * Implements the Lucene 7.0 index format, with configurable per-field postings
 * and docvalues formats.
 * <p>
 * If you want to reuse functionality of this codec in another codec, extend
 * {@link FilterCodec}.
 *
 * @see org.apache.lucene.codecs.lucene70 package documentation for file format details.
 *
 * @lucene.experimental
 */
public class Lucene70Codec extends Codec {
    private final TermVectorsFormat vectorsFormat = new Lucene50TermVectorsFormat();
    private final FieldInfosFormat fieldInfosFormat = new Lucene60FieldInfosFormat();
    private final SegmentInfoFormat segmentInfosFormat = new Lucene70SegmentInfoFormat();
    private final LiveDocsFormat liveDocsFormat = new Lucene50LiveDocsFormat();
    private final CompoundFormat compoundFormat = new Lucene50CompoundFormat();
    private final DocValuesFormat defaultDVFormat = DocValuesFormat.forName("Lucene70");

    private final PostingsFormat postingsFormat = new PerFieldPostingsFormat() {
        @Override
        public PostingsFormat getPostingsFormatForField(String field) {
            throw new IllegalStateException("This codec should only be used for reading, not writing");
        }
    };

    private final DocValuesFormat docValuesFormat = new PerFieldDocValuesFormat() {
        @Override
        public DocValuesFormat getDocValuesFormatForField(String field) {
            return defaultDVFormat;
        }
    };

    private final StoredFieldsFormat storedFieldsFormat = new Lucene50StoredFieldsFormat(Mode.BEST_SPEED);

    /** 
     * Instantiates a new codec.
     */
    public Lucene70Codec() {
        super("Lucene70");
    }

    @Override
    public final StoredFieldsFormat storedFieldsFormat() {
        return storedFieldsFormat;
    }

    @Override
    public final TermVectorsFormat termVectorsFormat() {
        return vectorsFormat;
    }

    @Override
    public final PostingsFormat postingsFormat() {
        return postingsFormat;
    }

    @Override
    public final FieldInfosFormat fieldInfosFormat() {
        return fieldInfosFormat;
    }

    @Override
    public final SegmentInfoFormat segmentInfoFormat() {
        return segmentInfosFormat;
    }

    @Override
    public final LiveDocsFormat liveDocsFormat() {
        return liveDocsFormat;
    }

    @Override
    public final CompoundFormat compoundFormat() {
        return compoundFormat;
    }

    @Override
    public final PointsFormat pointsFormat() {
        return new Lucene60PointsFormat();
    }

    @Override
    public final DocValuesFormat docValuesFormat() {
        return docValuesFormat;
    }

    private final NormsFormat normsFormat = new Lucene70NormsFormat();

    @Override
    public final NormsFormat normsFormat() {
        return normsFormat;
    }
}