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This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.index.fielddata.plain;
import org.apache.lucene.index.RandomAccessOrds;
import org.apache.lucene.index.SortedSetDocValues;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.BytesRefBuilder;
import org.apache.lucene.util.IntsRef;
import org.apache.lucene.util.IntsRefBuilder;
import org.apache.lucene.util.fst.FST;
import org.apache.lucene.util.fst.FST.Arc;
import org.apache.lucene.util.fst.FST.BytesReader;
import org.apache.lucene.util.fst.Util;
import org.elasticsearch.index.fielddata.ordinals.Ordinals;
import java.io.IOException;
/**
*/
public class FSTBytesAtomicFieldData extends AbstractAtomicOrdinalsFieldData {
// 0 ordinal in values means no value (its null)
protected final Ordinals ordinals;
private long size = -1;
private final FST fst;
public FSTBytesAtomicFieldData(FST fst, Ordinals ordinals) {
this.ordinals = ordinals;
this.fst = fst;
}
@Override
public void close() {
}
@Override
public long ramBytesUsed() {
if (size == -1) {
long size = ordinals.ramBytesUsed();
// FST
size += fst == null ? 0 : fst.ramBytesUsed();
this.size = size;
}
return size;
}
@Override
public RandomAccessOrds getOrdinalsValues() {
return ordinals.ordinals(new ValuesHolder(fst));
}
private static class ValuesHolder implements Ordinals.ValuesHolder {
private final FST fst;
// per-thread resources
private final BytesRefBuilder scratch;
protected final BytesReader in;
protected final Arc firstArc = new Arc<>();
protected final Arc scratchArc = new Arc<>();
protected final IntsRefBuilder scratchInts = new IntsRefBuilder();
ValuesHolder(FST fst) {
this.fst = fst;
scratch = new BytesRefBuilder();
in = fst.getBytesReader();
}
@Override
public BytesRef lookupOrd(long ord) {
assert ord != SortedSetDocValues.NO_MORE_ORDS;
in.setPosition(0);
fst.getFirstArc(firstArc);
try {
IntsRef output = Util.getByOutput(fst, ord, in, firstArc, scratchArc, scratchInts);
scratch.clear();
scratch.grow(output.length);
Util.toBytesRef(output, scratch);
} catch (IOException ex) {
//bogus
}
return scratch.get();
}
}
}