package org.apache.lucene.codecs.lucene41;
/*
* 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.Codec;
import org.apache.lucene.codecs.FieldInfosFormat;
import org.apache.lucene.codecs.FilterCodec;
import org.apache.lucene.codecs.LiveDocsFormat;
import org.apache.lucene.codecs.PostingsFormat;
import org.apache.lucene.codecs.SegmentInfoFormat;
import org.apache.lucene.codecs.DocValuesFormat;
import org.apache.lucene.codecs.NormsFormat;
import org.apache.lucene.codecs.StoredFieldsFormat;
import org.apache.lucene.codecs.StoredFieldsWriter;
import org.apache.lucene.codecs.TermVectorsFormat;
import org.apache.lucene.codecs.compressing.CompressingStoredFieldsFormat;
import org.apache.lucene.codecs.compressing.CompressionMode;
import org.apache.lucene.codecs.lucene40.Lucene40DocValuesFormat;
import org.apache.lucene.codecs.lucene40.Lucene40FieldInfosFormat;
import org.apache.lucene.codecs.lucene40.Lucene40LiveDocsFormat;
import org.apache.lucene.codecs.lucene40.Lucene40NormsFormat;
import org.apache.lucene.codecs.lucene40.Lucene40SegmentInfoFormat;
import org.apache.lucene.codecs.lucene40.Lucene40TermVectorsFormat;
import org.apache.lucene.codecs.perfield.PerFieldPostingsFormat;
import org.apache.lucene.index.SegmentInfo;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.IOContext;
/**
* Implements the Lucene 4.1 index format, with configurable per-field postings formats.
* <p>
* If you want to reuse functionality of this codec in another codec, extend
* {@link FilterCodec}.
*
* @see org.apache.lucene.codecs.lucene41 package documentation for file format details.
* @deprecated Only for reading old 4.0 segments
* @lucene.experimental
*/
@Deprecated
public class Lucene41Codec extends Codec {
// TODO: slightly evil
private final StoredFieldsFormat fieldsFormat = new CompressingStoredFieldsFormat("Lucene41StoredFields", CompressionMode.FAST, 1 << 14) {
@Override
public StoredFieldsWriter fieldsWriter(Directory directory, SegmentInfo si, IOContext context) throws IOException {
throw new UnsupportedOperationException("this codec can only be used for reading");
}
};
private final TermVectorsFormat vectorsFormat = new Lucene40TermVectorsFormat();
private final FieldInfosFormat fieldInfosFormat = new Lucene40FieldInfosFormat();
private final SegmentInfoFormat infosFormat = new Lucene40SegmentInfoFormat();
private final LiveDocsFormat liveDocsFormat = new Lucene40LiveDocsFormat();
private final PostingsFormat postingsFormat = new PerFieldPostingsFormat() {
@Override
public PostingsFormat getPostingsFormatForField(String field) {
return Lucene41Codec.this.getPostingsFormatForField(field);
}
};
/** Sole constructor. */
public Lucene41Codec() {
super("Lucene41");
}
// TODO: slightly evil
@Override
public StoredFieldsFormat storedFieldsFormat() {
return fieldsFormat;
}
@Override
public final TermVectorsFormat termVectorsFormat() {
return vectorsFormat;
}
@Override
public final PostingsFormat postingsFormat() {
return postingsFormat;
}
@Override
public FieldInfosFormat fieldInfosFormat() {
return fieldInfosFormat;
}
@Override
public SegmentInfoFormat segmentInfoFormat() {
return infosFormat;
}
@Override
public final LiveDocsFormat liveDocsFormat() {
return liveDocsFormat;
}
/** Returns the postings format that should be used for writing
* new segments of <code>field</code>.
*
* The default implementation always returns "Lucene41"
*/
public PostingsFormat getPostingsFormatForField(String field) {
return defaultFormat;
}
@Override
public DocValuesFormat docValuesFormat() {
return dvFormat;
}
private final PostingsFormat defaultFormat = PostingsFormat.forName("Lucene41");
private final DocValuesFormat dvFormat = new Lucene40DocValuesFormat();
private final NormsFormat normsFormat = new Lucene40NormsFormat();
@Override
public NormsFormat normsFormat() {
return normsFormat;
}
}