package org.apache.lucene.codecs.lucene41ords;
/*
* 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.FieldsConsumer;
import org.apache.lucene.codecs.FieldsProducer;
import org.apache.lucene.codecs.PostingsFormat;
import org.apache.lucene.codecs.PostingsReaderBase;
import org.apache.lucene.codecs.PostingsWriterBase;
import org.apache.lucene.codecs.blockterms.BlockTermsReader;
import org.apache.lucene.codecs.blockterms.BlockTermsWriter;
import org.apache.lucene.codecs.blockterms.FixedGapTermsIndexReader;
import org.apache.lucene.codecs.blockterms.FixedGapTermsIndexWriter;
import org.apache.lucene.codecs.blockterms.TermsIndexReaderBase;
import org.apache.lucene.codecs.blockterms.TermsIndexWriterBase;
import org.apache.lucene.codecs.lucene41.Lucene41PostingsFormat; // javadocs
import org.apache.lucene.codecs.lucene41.Lucene41PostingsReader;
import org.apache.lucene.codecs.lucene41.Lucene41PostingsWriter;
import org.apache.lucene.index.SegmentReadState;
import org.apache.lucene.index.SegmentWriteState;
import org.apache.lucene.util.BytesRef;
// TODO: we could make separate base class that can wrapp
// any PostingsBaseFormat and make it ord-able...
/**
* Customized version of {@link Lucene41PostingsFormat} that uses
* {@link FixedGapTermsIndexWriter}.
*/
public final class Lucene41WithOrds extends PostingsFormat {
public Lucene41WithOrds() {
super("Lucene41WithOrds");
}
@Override
public FieldsConsumer fieldsConsumer(SegmentWriteState state) throws IOException {
PostingsWriterBase docs = new Lucene41PostingsWriter(state);
// TODO: should we make the terms index more easily
// pluggable? Ie so that this codec would record which
// index impl was used, and switch on loading?
// Or... you must make a new Codec for this?
TermsIndexWriterBase indexWriter;
boolean success = false;
try {
indexWriter = new FixedGapTermsIndexWriter(state);
success = true;
} finally {
if (!success) {
docs.close();
}
}
success = false;
try {
// Must use BlockTermsWriter (not BlockTree) because
// BlockTree doens't support ords (yet)...
FieldsConsumer ret = new BlockTermsWriter(indexWriter, state, docs);
success = true;
return ret;
} finally {
if (!success) {
try {
docs.close();
} finally {
indexWriter.close();
}
}
}
}
public final static int TERMS_CACHE_SIZE = 1024;
@Override
public FieldsProducer fieldsProducer(SegmentReadState state) throws IOException {
PostingsReaderBase postings = new Lucene41PostingsReader(state.directory, state.fieldInfos, state.segmentInfo, state.context, state.segmentSuffix);
TermsIndexReaderBase indexReader;
boolean success = false;
try {
indexReader = new FixedGapTermsIndexReader(state.directory,
state.fieldInfos,
state.segmentInfo.name,
state.termsIndexDivisor,
BytesRef.getUTF8SortedAsUnicodeComparator(),
state.segmentSuffix, state.context);
success = true;
} finally {
if (!success) {
postings.close();
}
}
success = false;
try {
FieldsProducer ret = new BlockTermsReader(indexReader,
state.directory,
state.fieldInfos,
state.segmentInfo,
postings,
state.context,
TERMS_CACHE_SIZE,
state.segmentSuffix);
success = true;
return ret;
} finally {
if (!success) {
try {
postings.close();
} finally {
indexReader.close();
}
}
}
}
/** Extension of freq postings file */
static final String FREQ_EXTENSION = "frq";
/** Extension of prox postings file */
static final String PROX_EXTENSION = "prx";
}