package org.apache.lucene.codecs.nestedpulsing;
/*
* 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.BlockTreeTermsReader;
import org.apache.lucene.codecs.BlockTreeTermsWriter;
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.lucene41.Lucene41PostingsReader;
import org.apache.lucene.codecs.lucene41.Lucene41PostingsWriter;
import org.apache.lucene.codecs.pulsing.PulsingPostingsReader;
import org.apache.lucene.codecs.pulsing.PulsingPostingsWriter;
import org.apache.lucene.index.SegmentReadState;
import org.apache.lucene.index.SegmentWriteState;
import org.apache.lucene.util.IOUtils;
/**
* Pulsing(1, Pulsing(2, Lucene41))
* @lucene.experimental
*/
// TODO: if we create PulsingPostingsBaseFormat then we
// can simplify this? note: I don't like the *BaseFormat
// hierarchy, maybe we can clean that up...
public final class NestedPulsingPostingsFormat extends PostingsFormat {
public NestedPulsingPostingsFormat() {
super("NestedPulsing");
}
@Override
public FieldsConsumer fieldsConsumer(SegmentWriteState state) throws IOException {
PostingsWriterBase docsWriter = null;
PostingsWriterBase pulsingWriterInner = null;
PostingsWriterBase pulsingWriter = null;
// Terms dict
boolean success = false;
try {
docsWriter = new Lucene41PostingsWriter(state);
pulsingWriterInner = new PulsingPostingsWriter(2, docsWriter);
pulsingWriter = new PulsingPostingsWriter(1, pulsingWriterInner);
FieldsConsumer ret = new BlockTreeTermsWriter(state, pulsingWriter,
BlockTreeTermsWriter.DEFAULT_MIN_BLOCK_SIZE, BlockTreeTermsWriter.DEFAULT_MAX_BLOCK_SIZE);
success = true;
return ret;
} finally {
if (!success) {
IOUtils.closeWhileHandlingException(docsWriter, pulsingWriterInner, pulsingWriter);
}
}
}
@Override
public FieldsProducer fieldsProducer(SegmentReadState state) throws IOException {
PostingsReaderBase docsReader = null;
PostingsReaderBase pulsingReaderInner = null;
PostingsReaderBase pulsingReader = null;
boolean success = false;
try {
docsReader = new Lucene41PostingsReader(state.directory, state.fieldInfos, state.segmentInfo, state.context, state.segmentSuffix);
pulsingReaderInner = new PulsingPostingsReader(docsReader);
pulsingReader = new PulsingPostingsReader(pulsingReaderInner);
FieldsProducer ret = new BlockTreeTermsReader(
state.directory, state.fieldInfos, state.segmentInfo,
pulsingReader,
state.context,
state.segmentSuffix,
state.termsIndexDivisor);
success = true;
return ret;
} finally {
if (!success) {
IOUtils.closeWhileHandlingException(docsReader, pulsingReaderInner, pulsingReader);
}
}
}
}