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/*
* 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.DocValues;
import org.apache.lucene.index.RandomAccessOrds;
import org.apache.lucene.util.Accountable;
import org.elasticsearch.index.fielddata.AtomicOrdinalsFieldData;
import org.elasticsearch.index.fielddata.FieldData;
import org.elasticsearch.index.fielddata.ScriptDocValues;
import org.elasticsearch.index.fielddata.SortedBinaryDocValues;
import java.util.Collection;
import java.util.Collections;
import java.util.function.Function;
public abstract class AbstractAtomicOrdinalsFieldData implements AtomicOrdinalsFieldData {
public static final Function<RandomAccessOrds, ScriptDocValues<?>> DEFAULT_SCRIPT_FUNCTION =
((Function<RandomAccessOrds, SortedBinaryDocValues>) FieldData::toString)
.andThen(ScriptDocValues.Strings::new);
private final Function<RandomAccessOrds, ScriptDocValues<?>> scriptFunction;
protected AbstractAtomicOrdinalsFieldData(Function<RandomAccessOrds, ScriptDocValues<?>> scriptFunction) {
this.scriptFunction = scriptFunction;
}
@Override
public final ScriptDocValues<?> getScriptValues() {
return scriptFunction.apply(getOrdinalsValues());
}
@Override
public final SortedBinaryDocValues getBytesValues() {
return FieldData.toString(getOrdinalsValues());
}
public static AtomicOrdinalsFieldData empty() {
return new AbstractAtomicOrdinalsFieldData(DEFAULT_SCRIPT_FUNCTION) {
@Override
public long ramBytesUsed() {
return 0;
}
@Override
public Collection<Accountable> getChildResources() {
return Collections.emptyList();
}
@Override
public void close() {
}
@Override
public RandomAccessOrds getOrdinalsValues() {
return DocValues.emptySortedSet();
}
};
}
}
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