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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.aggregations.support.values;
import org.apache.lucene.search.Scorable;
import org.elasticsearch.common.lucene.ScorerAware;
import org.elasticsearch.common.util.CollectionUtils;
import org.elasticsearch.index.fielddata.SortedBinaryDocValues;
import org.elasticsearch.index.fielddata.SortingBinaryDocValues;
import org.elasticsearch.script.AggregationScript;
import java.io.IOException;
import java.lang.reflect.Array;
import java.util.Collection;
/**
* {@link SortedBinaryDocValues} implementation that reads values from a script.
*/
public class ScriptBytesValues extends SortingBinaryDocValues implements ScorerAware {
private final AggregationScript script;
public ScriptBytesValues(AggregationScript script) {
super();
this.script = script;
}
private void set(int i, Object o) {
if (o == null) {
values[i].clear();
} else {
CollectionUtils.ensureNoSelfReferences(o, "ScriptBytesValues value");
values[i].copyChars(o.toString());
}
}
@Override
public boolean advanceExact(int doc) throws IOException {
script.setDocument(doc);
final Object value = script.execute();
if (value == null) {
return false;
} else if (value.getClass().isArray()) {
count = Array.getLength(value);
if (count == 0) {
return false;
}
grow();
for (int i = 0; i < count; ++i) {
set(i, Array.get(value, i));
}
} else if (value instanceof Collection) {
final Collection coll = (Collection) value;
count = coll.size();
if (count == 0) {
return false;
}
grow();
int i = 0;
for (Object v : coll) {
set(i++, v);
}
} else {
count = 1;
set(0, value);
}
sort();
return true;
}
@Override
public void setScorer(Scorable scorer) {
script.setScorer(scorer);
}
}