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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.percentiles.tdigest;
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.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Objects;
abstract class AbstractInternalTDigestPercentiles extends InternalNumericMetricsAggregation.MultiValue {
protected final double[] keys;
protected final TDigestState state;
private final boolean keyed;
AbstractInternalTDigestPercentiles(String name, double[] keys, TDigestState state, boolean keyed, DocValueFormat formatter,
List<PipelineAggregator> pipelineAggregators,
Map<String, Object> metaData) {
super(name, pipelineAggregators, metaData);
this.keys = keys;
this.state = state;
this.keyed = keyed;
this.format = formatter;
}
/**
* Read from a stream.
*/
protected AbstractInternalTDigestPercentiles(StreamInput in) throws IOException {
super(in);
format = in.readNamedWriteable(DocValueFormat.class);
keys = in.readDoubleArray();
state = TDigestState.read(in);
keyed = in.readBoolean();
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeNamedWriteable(format);
out.writeDoubleArray(keys);
TDigestState.write(state, out);
out.writeBoolean(keyed);
}
@Override
public double value(String name) {
return value(Double.parseDouble(name));
}
public abstract double value(double key);
public long getEstimatedMemoryFootprint() {
return state.byteSize();
}
@Override
public AbstractInternalTDigestPercentiles doReduce(List<InternalAggregation> aggregations, ReduceContext reduceContext) {
TDigestState merged = null;
for (InternalAggregation aggregation : aggregations) {
final AbstractInternalTDigestPercentiles percentiles = (AbstractInternalTDigestPercentiles) aggregation;
if (merged == null) {
merged = new TDigestState(percentiles.state.compression());
}
merged.add(percentiles.state);
}
return createReduced(getName(), keys, merged, keyed, pipelineAggregators(), getMetaData());
}
protected abstract AbstractInternalTDigestPercentiles createReduced(String name, double[] keys, TDigestState merged, boolean keyed,
List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData);
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
if (keyed) {
builder.startObject(CommonFields.VALUES.getPreferredName());
for(int i = 0; i < keys.length; ++i) {
String key = String.valueOf(keys[i]);
double value = value(keys[i]);
builder.field(key, value);
if (format != DocValueFormat.RAW) {
builder.field(key + "_as_string", format.format(value));
}
}
builder.endObject();
} else {
builder.startArray(CommonFields.VALUES.getPreferredName());
for (int i = 0; i < keys.length; i++) {
double value = value(keys[i]);
builder.startObject();
builder.field(CommonFields.KEY.getPreferredName(), keys[i]);
builder.field(CommonFields.VALUE.getPreferredName(), value);
if (format != DocValueFormat.RAW) {
builder.field(CommonFields.VALUE_AS_STRING.getPreferredName(), format.format(value));
}
builder.endObject();
}
builder.endArray();
}
return builder;
}
@Override
protected boolean doEquals(Object obj) {
AbstractInternalTDigestPercentiles that = (AbstractInternalTDigestPercentiles) obj;
return keyed == that.keyed
&& Arrays.equals(keys, that.keys)
&& Objects.equals(state, that.state);
}
@Override
protected int doHashCode() {
return Objects.hash(keyed, Arrays.hashCode(keys), state);
}
}