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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.aggregations.pipeline;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.pipeline.BucketHelpers.GapPolicy;
import org.elasticsearch.search.aggregations.support.AggregationPath;
import org.elasticsearch.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
public abstract class BucketMetricsPipelineAggregationBuilder> extends
AbstractPipelineAggregationBuilder {
private String format;
private GapPolicy gapPolicy;
protected BucketMetricsPipelineAggregationBuilder(String name, String type, String[] bucketsPaths) {
this(name, type, bucketsPaths, null, GapPolicy.SKIP);
}
protected BucketMetricsPipelineAggregationBuilder(String name, String type, String[] bucketsPaths, String format, GapPolicy gapPolicy) {
super(name, type, bucketsPaths);
this.format = format;
this.gapPolicy = gapPolicy;
}
/**
* Read from a stream.
*/
protected BucketMetricsPipelineAggregationBuilder(StreamInput in, String type) throws IOException {
super(in, type);
format = in.readOptionalString();
gapPolicy = GapPolicy.readFrom(in);
}
@Override
protected final void doWriteTo(StreamOutput out) throws IOException {
out.writeOptionalString(format);
gapPolicy.writeTo(out);
innerWriteTo(out);
}
protected abstract void innerWriteTo(StreamOutput out) throws IOException;
/**
* Sets the format to use on the output of this aggregation.
*/
@SuppressWarnings("unchecked")
public AF format(String format) {
this.format = format;
return (AF) this;
}
/**
* Gets the format to use on the output of this aggregation.
*/
public String format() {
return format;
}
protected DocValueFormat formatter() {
if (format != null) {
return new DocValueFormat.Decimal(format);
} else {
return DocValueFormat.RAW;
}
}
/**
* Sets the gap policy to use for this aggregation.
*/
@SuppressWarnings("unchecked")
public AF gapPolicy(GapPolicy gapPolicy) {
this.gapPolicy = gapPolicy;
return (AF) this;
}
/**
* Gets the gap policy to use for this aggregation.
*/
public GapPolicy gapPolicy() {
return gapPolicy;
}
@Override
protected abstract PipelineAggregator createInternal(Map metadata);
@Override
protected void validate(ValidationContext context) {
if (bucketsPaths.length != 1) {
context.addBucketPathValidationError("must contain a single entry for aggregation [" + name + "]");
return;
}
// find the first agg name in the buckets path to check its a multi bucket agg
List path = AggregationPath.parse(bucketsPaths[0]).getPathElements();
int pathPos = 0;
AggregationPath.PathElement currentAgg = path.get(pathPos++);
final String aggName = currentAgg.name();
Optional aggBuilder = context.getSiblingAggregations()
.stream()
.filter(builder -> builder.getName().equals(aggName))
.findAny();
if (aggBuilder.isEmpty()) {
context.addBucketPathValidationError("aggregation does not exist for aggregation [" + name + "]: " + bucketsPaths[0]);
return;
}
// Dig through the aggregation tree to find the first aggregation specified by the path.
// The path may have many single bucket aggs (with sub-aggs) or many multi-bucket aggs specified by bucket keys
while (aggBuilder.isPresent()
&& pathPos < path.size()
&& ((aggBuilder.get().bucketCardinality() == AggregationBuilder.BucketCardinality.MANY
&& AggregationPath.pathElementContainsBucketKey(currentAgg))
|| (aggBuilder.get().bucketCardinality() == AggregationBuilder.BucketCardinality.ONE
&& aggBuilder.get().getSubAggregations().isEmpty() == false))) {
currentAgg = path.get(pathPos++);
final String subAggName = currentAgg.name();
aggBuilder = aggBuilder.get().getSubAggregations().stream().filter(b -> b.getName().equals(subAggName)).findAny();
}
if (aggBuilder.isEmpty()) {
context.addBucketPathValidationError(
"aggregation does not exist for aggregation ["
+ name
+ "]: "
+ AggregationPath.pathElementsAsStringList(path.subList(0, pathPos))
);
return;
}
if (aggBuilder.get().bucketCardinality() != AggregationBuilder.BucketCardinality.MANY) {
context.addValidationError(
"Unable to find unqualified multi-bucket aggregation in "
+ PipelineAggregator.Parser.BUCKETS_PATH.getPreferredName()
+ ". Path must include a multi-bucket aggregation for aggregation ["
+ name
+ "] found :"
+ aggBuilder.get().getClass().getName()
+ " for buckets path: "
+ bucketsPaths[0]
);
}
}
@Override
protected final XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException {
if (format != null) {
builder.field(BucketMetricsParser.FORMAT.getPreferredName(), format);
}
if (gapPolicy != null) {
builder.field(BucketMetricsParser.GAP_POLICY.getPreferredName(), gapPolicy.getName());
}
doXContentBody(builder, params);
return builder;
}
protected abstract XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException;
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), format, gapPolicy);
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null || getClass() != obj.getClass()) return false;
if (super.equals(obj) == false) return false;
@SuppressWarnings("unchecked")
BucketMetricsPipelineAggregationBuilder other = (BucketMetricsPipelineAggregationBuilder) obj;
return Objects.equals(format, other.format) && Objects.equals(gapPolicy, other.gapPolicy);
}
}