org.elasticsearch.index.mapper.DocValueFetcher Maven / Gradle / Ivy
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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.index.mapper;
import org.apache.lucene.index.LeafReaderContext;
import org.elasticsearch.index.fielddata.IndexFieldData;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.lookup.SourceLookup;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import static java.util.Collections.emptyList;
/**
* Value fetcher that loads from doc values.
*/
public final class DocValueFetcher implements ValueFetcher {
private final DocValueFormat format;
private final IndexFieldData ifd;
private Leaf leaf;
public DocValueFetcher(DocValueFormat format, IndexFieldData ifd) {
this.format = format;
this.ifd = ifd;
}
public void setNextReader(LeafReaderContext context) {
leaf = ifd.load(context).getLeafValueFetcher(format);
}
@Override
public List