Package org.elasticsearch.search.aggregations

Class InternalOrder

java.lang.Object

org.elasticsearch.search.aggregations.BucketOrder

org.elasticsearch.search.aggregations.InternalOrder

All Implemented Interfaces:

Writeable, ToXContent, ToXContentObject

Direct Known Subclasses:

InternalOrder.Aggregation

public class InternalOrder
extends BucketOrder

Implementations for MultiBucketsAggregation.Bucket ordering strategies.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	InternalOrder.Aggregation	MultiBucketsAggregation.Bucket ordering strategy to sort by a sub-aggregation.
static class	InternalOrder.CompoundOrder	MultiBucketsAggregation.Bucket ordering strategy to sort by multiple criteria.
static class	InternalOrder.Parser	Contains logic for parsing a BucketOrder from a XContentParser.
static class	InternalOrder.Streams	Contains logic for reading/writing BucketOrder from/to streams.

Nested classes/interfaces inherited from interface org.elasticsearch.common.xcontent.ToXContent

ToXContent.DelegatingMapParams, ToXContent.MapParams, ToXContent.Params

Nested classes/interfaces inherited from interface org.elasticsearch.common.io.stream.Writeable

Writeable.Reader<V>, Writeable.Writer<V>

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	asc
protected java.util.Comparator<MultiBucketsAggregation.Bucket>	comparator

Fields inherited from interface org.elasticsearch.common.xcontent.ToXContent

EMPTY_PARAMS

Constructor Summary

Constructors

Constructor	Description
InternalOrder(byte id, java.lang.String key, boolean asc, java.util.Comparator<MultiBucketsAggregation.Bucket> comparator)	Creates an ordering strategy that sorts MultiBucketsAggregation.Buckets by some property.

Method Summary

Modifier and Type	Method	Description
java.util.Comparator<MultiBucketsAggregation.Bucket>	comparator(Aggregator aggregator)
boolean	equals(java.lang.Object obj)
int	hashCode()
static boolean	isCountDesc(BucketOrder order)	Determine if the ordering strategy is sorting on bucket count descending.
static boolean	isKeyAsc(BucketOrder order)	Determine if the ordering strategy is sorting on bucket key ascending.
static boolean	isKeyDesc(BucketOrder order)	Determine if the ordering strategy is sorting on bucket key descending.
static boolean	isKeyOrder(BucketOrder order)	Determine if the ordering strategy is sorting on bucket key (ascending or descending).
XContentBuilder	toXContent(XContentBuilder builder, ToXContent.Params params)
static BucketOrder	validate(BucketOrder order, Aggregator aggregator)	Validate a bucket ordering strategy for an Aggregator.

Methods inherited from class org.elasticsearch.search.aggregations.BucketOrder

aggregation, aggregation, compound, compound, count, key, toString, writeTo

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.elasticsearch.common.xcontent.ToXContentObject

isFragment

Field Detail

asc

protected final boolean asc

comparator

protected final java.util.Comparator<MultiBucketsAggregation.Bucket> comparator

Constructor Detail

InternalOrder

public InternalOrder(byte id,
                     java.lang.String key,
                     boolean asc,
                     java.util.Comparator<MultiBucketsAggregation.Bucket> comparator)

Creates an ordering strategy that sorts MultiBucketsAggregation.Buckets by some property.

Parameters:

id - unique ID for this ordering strategy.

key - key of the property to sort on.

asc - direction to sort by: true for ascending, false for descending.

comparator - determines how buckets will be ordered.

Method Detail

comparator

public java.util.Comparator<MultiBucketsAggregation.Bucket> comparator(Aggregator aggregator)

Specified by:

comparator in class BucketOrder

Returns:

A comparator for the bucket based on the given aggregator. The comparator is used in two phases:

- aggregation phase, where each shard builds a list of buckets to be sent to the coordinating node. In this phase, the passed in aggregator will be the aggregator that aggregates the buckets on the shard level.

- reduce phase, where the coordinating node gathers all the buckets from all the shards and reduces them to a final bucket list. In this case, the passed in aggregator will be null.

toXContent

public XContentBuilder toXContent(XContentBuilder builder,
                                  ToXContent.Params params)
                           throws java.io.IOException

Throws:

java.io.IOException

validate

public static BucketOrder validate(BucketOrder order,
                                   Aggregator aggregator)
                            throws AggregationExecutionException

Validate a bucket ordering strategy for an Aggregator.

Parameters:

order - bucket ordering strategy to sort on.

aggregator - aggregator to sort.

Returns:

unmodified bucket ordering strategy.

Throws:

AggregationExecutionException - if validation fails

isCountDesc

public static boolean isCountDesc(BucketOrder order)

Determine if the ordering strategy is sorting on bucket count descending.

Parameters:

order - bucket ordering strategy to check.

Returns:

true if the ordering strategy is sorting on bucket count descending, false otherwise.

isKeyOrder

public static boolean isKeyOrder(BucketOrder order)

Determine if the ordering strategy is sorting on bucket key (ascending or descending).

Parameters:

order - bucket ordering strategy to check.

Returns:

true if the ordering strategy is sorting on bucket key, false otherwise.

isKeyAsc

public static boolean isKeyAsc(BucketOrder order)

Determine if the ordering strategy is sorting on bucket key ascending.

Parameters:

order - bucket ordering strategy to check.

Returns:

true if the ordering strategy is sorting on bucket key ascending, false otherwise.

isKeyDesc

public static boolean isKeyDesc(BucketOrder order)

Determine if the ordering strategy is sorting on bucket key descending.

Parameters:

order - bucket ordering strategy to check.

Returns:

true if the ordering strategy is sorting on bucket key descending, false otherwise.

hashCode

public int hashCode()

Specified by:

hashCode in class BucketOrder

equals

public boolean equals(java.lang.Object obj)

Specified by:

equals in class BucketOrder