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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.action.fieldstats;
import org.elasticsearch.Version;
import org.elasticsearch.action.support.broadcast.BroadcastShardResponse;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.index.shard.ShardId;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;
public class FieldStatsShardResponse extends BroadcastShardResponse {
private Map<String, FieldStats<?>> fieldStats;
public FieldStatsShardResponse() {
}
public FieldStatsShardResponse(ShardId shardId, Map<String, FieldStats<?>> fieldStats) {
super(shardId);
this.fieldStats = fieldStats;
}
public Map<String, FieldStats<?>> getFieldStats() {
return fieldStats;
}
Map<String, FieldStats<?> > filterNullMinMax() {
return fieldStats.entrySet().stream()
.filter((e) -> e.getValue().hasMinMax())
.collect(Collectors.toMap(p -> p.getKey(), p -> p.getValue()));
}
@Override
public void readFrom(StreamInput in) throws IOException {
super.readFrom(in);
final int size = in.readVInt();
fieldStats = new HashMap<>(size);
for (int i = 0; i < size; i++) {
String key = in.readString();
FieldStats value = FieldStats.readFrom(in);
fieldStats.put(key, value);
}
}
@Override
public void writeTo(StreamOutput out) throws IOException {
super.writeTo(out);
final Map<String, FieldStats<?> > stats;
if (out.getVersion().before(Version.V_5_2_0)) {
/**
* FieldStats with null min/max are not (de)serializable in versions prior to {@link Version.V_5_2_0_UNRELEASED}
*/
stats = filterNullMinMax();
} else {
stats = getFieldStats();
}
out.writeVInt(stats.size());
for (Map.Entry<String, FieldStats<?>> entry : stats.entrySet()) {
out.writeString(entry.getKey());
entry.getValue().writeTo(out);
}
}
}
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