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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.search.aggregations.metrics.max;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.metrics.InternalNumericMetricsAggregation;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.Objects;
public class InternalMax extends InternalNumericMetricsAggregation.SingleValue implements Max {
private final double max;
public InternalMax(String name, double max, DocValueFormat formatter, List pipelineAggregators,
Map metaData) {
super(name, pipelineAggregators, metaData);
this.format = formatter;
this.max = max;
}
/**
* Read from a stream.
*/
public InternalMax(StreamInput in) throws IOException {
super(in);
format = in.readNamedWriteable(DocValueFormat.class);
max = in.readDouble();
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeNamedWriteable(format);
out.writeDouble(max);
}
@Override
public String getWriteableName() {
return MaxAggregationBuilder.NAME;
}
@Override
public double value() {
return max;
}
@Override
public double getValue() {
return max;
}
@Override
public InternalMax doReduce(List aggregations, ReduceContext reduceContext) {
double max = Double.NEGATIVE_INFINITY;
for (InternalAggregation aggregation : aggregations) {
max = Math.max(max, ((InternalMax) aggregation).max);
}
return new InternalMax(name, max, format, pipelineAggregators(), getMetaData());
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
boolean hasValue = !Double.isInfinite(max);
builder.field(CommonFields.VALUE.getPreferredName(), hasValue ? max : null);
if (hasValue && format != DocValueFormat.RAW) {
builder.field(CommonFields.VALUE_AS_STRING.getPreferredName(), format.format(max).toString());
}
return builder;
}
@Override
protected int doHashCode() {
return Objects.hash(max);
}
@Override
protected boolean doEquals(Object obj) {
InternalMax other = (InternalMax) obj;
return Objects.equals(max, other.max);
}
}