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/*
* 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.bucket.histogram;
import org.elasticsearch.Version;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.BucketOrder;
import org.elasticsearch.search.aggregations.InternalOrder;
import org.elasticsearch.search.aggregations.InternalOrder.CompoundOrder;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.aggregations.support.CoreValuesSourceType;
import org.elasticsearch.search.aggregations.support.ValuesSourceAggregationBuilder;
import org.elasticsearch.search.aggregations.support.ValuesSourceAggregatorFactory;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.aggregations.support.ValuesSourceRegistry;
import org.elasticsearch.search.aggregations.support.ValuesSourceType;
import org.elasticsearch.xcontent.ObjectParser;
import org.elasticsearch.xcontent.ParseField;
import org.elasticsearch.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.function.Consumer;
/**
* A builder for histograms on numeric fields. This builder can operate on either base numeric fields, or numeric range fields. IP range
* fields are unsupported, and will throw at the factory layer.
*/
public class HistogramAggregationBuilder extends ValuesSourceAggregationBuilder {
public static final String NAME = "histogram";
public static final ValuesSourceRegistry.RegistryKey REGISTRY_KEY = new ValuesSourceRegistry.RegistryKey<>(
NAME,
HistogramAggregatorSupplier.class
);
private static final ObjectParser EXTENDED_BOUNDS_PARSER = new ObjectParser<>(
Histogram.EXTENDED_BOUNDS_FIELD.getPreferredName(),
() -> new double[] { Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY }
);
static {
EXTENDED_BOUNDS_PARSER.declareDouble((bounds, d) -> bounds[0] = d, new ParseField("min"));
EXTENDED_BOUNDS_PARSER.declareDouble((bounds, d) -> bounds[1] = d, new ParseField("max"));
}
public static final ObjectParser PARSER = ObjectParser.fromBuilder(
NAME,
HistogramAggregationBuilder::new
);
static {
ValuesSourceAggregationBuilder.declareFields(PARSER, true, true, false);
PARSER.declareDouble(HistogramAggregationBuilder::interval, Histogram.INTERVAL_FIELD);
PARSER.declareDouble(HistogramAggregationBuilder::offset, Histogram.OFFSET_FIELD);
PARSER.declareBoolean(HistogramAggregationBuilder::keyed, Histogram.KEYED_FIELD);
PARSER.declareLong(HistogramAggregationBuilder::minDocCount, Histogram.MIN_DOC_COUNT_FIELD);
PARSER.declareField(
HistogramAggregationBuilder::extendedBounds,
parser -> DoubleBounds.PARSER.apply(parser, null),
Histogram.EXTENDED_BOUNDS_FIELD,
ObjectParser.ValueType.OBJECT
);
PARSER.declareField(
HistogramAggregationBuilder::hardBounds,
parser -> DoubleBounds.PARSER.apply(parser, null),
Histogram.HARD_BOUNDS_FIELD,
ObjectParser.ValueType.OBJECT
);
PARSER.declareObjectArray(
HistogramAggregationBuilder::order,
(p, c) -> InternalOrder.Parser.parseOrderParam(p),
Histogram.ORDER_FIELD
);
}
public static void registerAggregators(ValuesSourceRegistry.Builder builder) {
HistogramAggregatorFactory.registerAggregators(builder);
}
private double interval;
private double offset = 0;
private DoubleBounds extendedBounds;
private DoubleBounds hardBounds;
private BucketOrder order = BucketOrder.key(true);
private boolean keyed = false;
private long minDocCount = 0;
@Override
protected ValuesSourceType defaultValueSourceType() {
return CoreValuesSourceType.NUMERIC;
}
/** Create a new builder with the given name. */
public HistogramAggregationBuilder(String name) {
super(name);
}
protected HistogramAggregationBuilder(
HistogramAggregationBuilder clone,
AggregatorFactories.Builder factoriesBuilder,
Map metadata
) {
super(clone, factoriesBuilder, metadata);
this.interval = clone.interval;
this.offset = clone.offset;
this.extendedBounds = clone.extendedBounds;
this.hardBounds = clone.hardBounds;
this.order = clone.order;
this.keyed = clone.keyed;
this.minDocCount = clone.minDocCount;
}
@Override
protected AggregationBuilder shallowCopy(AggregatorFactories.Builder factoriesBuilder, Map metadata) {
return new HistogramAggregationBuilder(this, factoriesBuilder, metadata);
}
/** Read from a stream, for internal use only. */
public HistogramAggregationBuilder(StreamInput in) throws IOException {
super(in);
order = InternalOrder.Streams.readHistogramOrder(in, true);
keyed = in.readBoolean();
minDocCount = in.readVLong();
interval = in.readDouble();
offset = in.readDouble();
if (in.getVersion().onOrAfter(Version.V_7_10_0)) {
extendedBounds = in.readOptionalWriteable(DoubleBounds::new);
hardBounds = in.readOptionalWriteable(DoubleBounds::new);
} else {
double minBound = in.readDouble();
double maxBound = in.readDouble();
if (minBound == Double.POSITIVE_INFINITY && maxBound == Double.NEGATIVE_INFINITY) {
extendedBounds = null;
} else {
extendedBounds = new DoubleBounds(minBound, maxBound);
}
}
}
@Override
protected void innerWriteTo(StreamOutput out) throws IOException {
InternalOrder.Streams.writeHistogramOrder(order, out, true);
out.writeBoolean(keyed);
out.writeVLong(minDocCount);
out.writeDouble(interval);
out.writeDouble(offset);
if (out.getVersion().onOrAfter(Version.V_7_10_0)) {
out.writeOptionalWriteable(extendedBounds);
out.writeOptionalWriteable(hardBounds);
} else {
if (extendedBounds != null) {
out.writeDouble(extendedBounds.getMin());
out.writeDouble(extendedBounds.getMax());
} else {
out.writeDouble(Double.POSITIVE_INFINITY);
out.writeDouble(Double.NEGATIVE_INFINITY);
}
}
}
/** Get the current interval that is set on this builder. */
public double interval() {
return interval;
}
/** Set the interval on this builder, and return the builder so that calls can be chained. */
public HistogramAggregationBuilder interval(double interval) {
if (interval <= 0) {
throw new IllegalArgumentException("[interval] must be >0 for histogram aggregation [" + name + "]");
}
this.interval = interval;
return this;
}
/** Get the current offset that is set on this builder. */
public double offset() {
return offset;
}
/** Set the offset on this builder, and return the builder so that calls can be chained. */
public HistogramAggregationBuilder offset(double offset) {
this.offset = offset;
return this;
}
/** Get the current minimum bound that is set on this builder. */
public double minBound() {
return DoubleBounds.getEffectiveMin(extendedBounds);
}
/** Get the current maximum bound that is set on this builder. */
public double maxBound() {
return DoubleBounds.getEffectiveMax(extendedBounds);
}
protected DoubleBounds extendedBounds() {
return extendedBounds;
}
/**
* Set extended bounds on this builder: buckets between {@code minBound} and
* {@code maxBound} will be created even if no documents fell into these
* buckets.
*
* @throws IllegalArgumentException
* if maxBound is less that minBound, or if either of the bounds
* are not finite.
*/
public HistogramAggregationBuilder extendedBounds(double minBound, double maxBound) {
return extendedBounds(new DoubleBounds(minBound, maxBound));
}
/**
* Set extended bounds on this builder: buckets between {@code minBound} and
* {@code maxBound} will be created even if no documents fell into these
* buckets.
*
* @throws IllegalArgumentException
* if maxBound is less that minBound, or if either of the bounds
* are not finite.
*/
public HistogramAggregationBuilder extendedBounds(DoubleBounds extendedBounds) {
if (extendedBounds == null) {
throw new IllegalArgumentException("[extended_bounds] must not be null: [" + name + "]");
}
this.extendedBounds = extendedBounds;
return this;
}
/**
* Set hard bounds on this histogram, specifying boundaries outside which buckets cannot be created.
*/
public HistogramAggregationBuilder hardBounds(DoubleBounds hardBounds) {
if (hardBounds == null) {
throw new IllegalArgumentException("[hardBounds] must not be null: [" + name + "]");
}
this.hardBounds = hardBounds;
return this;
}
/** Return the order to use to sort buckets of this histogram. */
public BucketOrder order() {
return order;
}
/** Set a new order on this builder and return the builder so that calls
* can be chained. A tie-breaker may be added to avoid non-deterministic ordering. */
public HistogramAggregationBuilder order(BucketOrder order) {
if (order == null) {
throw new IllegalArgumentException("[order] must not be null: [" + name + "]");
}
if (order instanceof CompoundOrder || InternalOrder.isKeyOrder(order)) {
this.order = order; // if order already contains a tie-breaker we are good to go
} else { // otherwise add a tie-breaker by using a compound order
this.order = BucketOrder.compound(order);
}
return this;
}
/**
* Sets the order in which the buckets will be returned. A tie-breaker may be added to avoid non-deterministic
* ordering.
*/
public HistogramAggregationBuilder order(List orders) {
if (orders == null) {
throw new IllegalArgumentException("[orders] must not be null: [" + name + "]");
}
// if the list only contains one order use that to avoid inconsistent xcontent
order(orders.size() > 1 ? BucketOrder.compound(orders) : orders.get(0));
return this;
}
/** Return whether buckets should be returned as a hash. In case
* {@code keyed} is false, buckets will be returned as an array. */
public boolean keyed() {
return keyed;
}
/** Set whether to return buckets as a hash or as an array, and return the
* builder so that calls can be chained. */
public HistogramAggregationBuilder keyed(boolean keyed) {
this.keyed = keyed;
return this;
}
/** Return the minimum count of documents that buckets need to have in order
* to be included in the response. */
public long minDocCount() {
return minDocCount;
}
/** Set the minimum count of matching documents that buckets need to have
* and return this builder so that calls can be chained. */
public HistogramAggregationBuilder minDocCount(long minDocCount) {
if (minDocCount < 0) {
throw new IllegalArgumentException(
"[minDocCount] must be greater than or equal to 0. Found [" + minDocCount + "] in [" + name + "]"
);
}
this.minDocCount = minDocCount;
return this;
}
@Override
public BucketCardinality bucketCardinality() {
return BucketCardinality.MANY;
}
@Override
protected XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
builder.field(Histogram.INTERVAL_FIELD.getPreferredName(), interval);
builder.field(Histogram.OFFSET_FIELD.getPreferredName(), offset);
if (order != null) {
builder.field(Histogram.ORDER_FIELD.getPreferredName());
order.toXContent(builder, params);
}
builder.field(Histogram.KEYED_FIELD.getPreferredName(), keyed);
builder.field(Histogram.MIN_DOC_COUNT_FIELD.getPreferredName(), minDocCount);
if (extendedBounds != null) {
builder.startObject(Histogram.EXTENDED_BOUNDS_FIELD.getPreferredName());
extendedBounds.toXContent(builder, params);
builder.endObject();
}
if (hardBounds != null) {
builder.startObject(Histogram.HARD_BOUNDS_FIELD.getPreferredName());
hardBounds.toXContent(builder, params);
builder.endObject();
}
return builder;
}
@Override
public String getType() {
return NAME;
}
@Override
protected ValuesSourceRegistry.RegistryKey getRegistryKey() {
return REGISTRY_KEY;
}
@Override
protected ValuesSourceAggregatorFactory innerBuild(
AggregationContext context,
ValuesSourceConfig config,
AggregatorFactory parent,
AggregatorFactories.Builder subFactoriesBuilder
) throws IOException {
HistogramAggregatorSupplier aggregatorSupplier = context.getValuesSourceRegistry().getAggregator(REGISTRY_KEY, config);
if (hardBounds != null && extendedBounds != null) {
if (hardBounds.getMax() != null && extendedBounds.getMax() != null && hardBounds.getMax() < extendedBounds.getMax()) {
throw new IllegalArgumentException(
"Extended bounds have to be inside hard bounds, hard bounds: ["
+ hardBounds
+ "], extended bounds: ["
+ extendedBounds.getMin()
+ "--"
+ extendedBounds.getMax()
+ "]"
);
}
if (hardBounds.getMin() != null && extendedBounds.getMin() != null && hardBounds.getMin() > extendedBounds.getMin()) {
throw new IllegalArgumentException(
"Extended bounds have to be inside hard bounds, hard bounds: ["
+ hardBounds
+ "], extended bounds: ["
+ extendedBounds.getMin()
+ "--"
+ extendedBounds.getMax()
+ "]"
);
}
}
return new HistogramAggregatorFactory(
name,
config,
interval,
offset,
order,
keyed,
minDocCount,
extendedBounds,
hardBounds,
context,
parent,
subFactoriesBuilder,
metadata,
aggregatorSupplier
);
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), order, keyed, minDocCount, interval, offset, extendedBounds, hardBounds);
}
@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;
HistogramAggregationBuilder other = (HistogramAggregationBuilder) obj;
return Objects.equals(order, other.order)
&& Objects.equals(keyed, other.keyed)
&& Objects.equals(minDocCount, other.minDocCount)
&& Objects.equals(interval, other.interval)
&& Objects.equals(offset, other.offset)
&& Objects.equals(extendedBounds, other.extendedBounds)
&& Objects.equals(hardBounds, other.hardBounds);
}
@Override
protected void validateSequentiallyOrdered(String type, String name, Consumer addValidationError) {}
@Override
protected void validateSequentiallyOrderedWithoutGaps(String type, String name, Consumer addValidationError) {
if (minDocCount != 0) {
addValidationError.accept("parent histogram of " + type + " aggregation [" + name + "] must have min_doc_count of 0");
}
}
}