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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;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import java.io.IOException;
import java.util.Map;
import java.util.Set;
/**
* Since {@link org.elasticsearch.search.internal.SearchContext} no longer hold the states of search, the top K results
* (i.e., documents that will be rescored by query rescorers) need to be serialized/ deserialized between search phases.
* A {@link RescoreDocIds} encapsulates the top K results for each rescorer by its ordinal index.
*/
public final class RescoreDocIds implements Writeable {
public static final RescoreDocIds EMPTY = new RescoreDocIds(Map.of());
private final Map> docIds;
public RescoreDocIds(Map> docIds) {
this.docIds = docIds;
}
public RescoreDocIds(StreamInput in) throws IOException {
docIds = in.readMap(StreamInput::readVInt, i -> i.readCollectionAsSet(StreamInput::readVInt));
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeMap(docIds, StreamOutput::writeVInt, (o, v) -> o.writeCollection(v, StreamOutput::writeVInt));
}
public Set getId(int index) {
return docIds.get(index);
}
}