package org.apache.lucene.codecs.mockintblock;
/*
* 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.intblock.FixedIntBlockIndexInput;
import org.apache.lucene.codecs.intblock.FixedIntBlockIndexOutput;
import org.apache.lucene.codecs.sep.IntIndexInput;
import org.apache.lucene.codecs.sep.IntIndexOutput;
import org.apache.lucene.codecs.sep.IntStreamFactory;
import org.apache.lucene.codecs.sep.SepPostingsReader;
import org.apache.lucene.codecs.sep.SepPostingsWriter;
import org.apache.lucene.index.SegmentWriteState;
import org.apache.lucene.index.SegmentReadState;
import org.apache.lucene.store.*;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.IOUtils;
/**
* A silly test codec to verify core support for fixed
* sized int block encoders is working. The int encoder
* used here just writes each block as a series of vInt.
*/
public final class MockFixedIntBlockPostingsFormat extends PostingsFormat {
private final int blockSize;
public MockFixedIntBlockPostingsFormat() {
this(1);
}
public MockFixedIntBlockPostingsFormat(int blockSize) {
super("MockFixedIntBlock");
this.blockSize = blockSize;
}
@Override
public String toString() {
return getName() + "(blockSize=" + blockSize + ")";
}
// only for testing
public IntStreamFactory getIntFactory() {
return new MockIntFactory(blockSize);
}
/**
* Encodes blocks as vInts of a fixed block size.
*/
public static class MockIntFactory extends IntStreamFactory {
private final int blockSize;
public MockIntFactory(int blockSize) {
this.blockSize = blockSize;
}
@Override
public IntIndexInput openInput(Directory dir, String fileName, IOContext context) throws IOException {
return new FixedIntBlockIndexInput(dir.openInput(fileName, context)) {
@Override
protected BlockReader getBlockReader(final IndexInput in, final int[] buffer) {
return new BlockReader() {
public void seek(long pos) {}
@Override
public void readBlock() throws IOException {
for(int i=0;i<buffer.length;i++) {
buffer[i] = in.readVInt();
}
}
};
}
};
}
@Override
public IntIndexOutput createOutput(Directory dir, String fileName, IOContext context) throws IOException {
IndexOutput out = dir.createOutput(fileName, context);
boolean success = false;
try {
FixedIntBlockIndexOutput ret = new FixedIntBlockIndexOutput(out, blockSize) {
@Override
protected void flushBlock() throws IOException {
for(int i=0;i<buffer.length;i++) {
out.writeVInt(buffer[i]);
}
}
};
success = true;
return ret;
} finally {
if (!success) {
IOUtils.closeWhileHandlingException(out);
}
}
}
}
@Override
public FieldsConsumer fieldsConsumer(SegmentWriteState state) throws IOException {
PostingsWriterBase postingsWriter = new SepPostingsWriter(state, new MockIntFactory(blockSize));
boolean success = false;
TermsIndexWriterBase indexWriter;
try {
indexWriter = new FixedGapTermsIndexWriter(state);
success = true;
} finally {
if (!success) {
postingsWriter.close();
}
}
success = false;
try {
FieldsConsumer ret = new BlockTermsWriter(indexWriter, state, postingsWriter);
success = true;
return ret;
} finally {
if (!success) {
try {
postingsWriter.close();
} finally {
indexWriter.close();
}
}
}
}
@Override
public FieldsProducer fieldsProducer(SegmentReadState state) throws IOException {
PostingsReaderBase postingsReader = new SepPostingsReader(state.directory,
state.fieldInfos,
state.segmentInfo,
state.context,
new MockIntFactory(blockSize), state.segmentSuffix);
TermsIndexReaderBase indexReader;
boolean success = false;
try {
indexReader = new FixedGapTermsIndexReader(state.directory,
state.fieldInfos,
state.segmentInfo.name,
state.termsIndexDivisor,
BytesRef.getUTF8SortedAsUnicodeComparator(), state.segmentSuffix,
IOContext.DEFAULT);
success = true;
} finally {
if (!success) {
postingsReader.close();
}
}
success = false;
try {
FieldsProducer ret = new BlockTermsReader(indexReader,
state.directory,
state.fieldInfos,
state.segmentInfo,
postingsReader,
state.context,
state.segmentSuffix);
success = true;
return ret;
} finally {
if (!success) {
try {
postingsReader.close();
} finally {
indexReader.close();
}
}
}
}
}