com.yahoo.search.grouping

Class UniqueGroupingSearcher

java.lang.Object

com.yahoo.component.AbstractComponent

com.yahoo.component.chain.ChainedComponent

com.yahoo.processing.Processor

com.yahoo.search.Searcher

com.yahoo.search.grouping.UniqueGroupingSearcher

All Implemented Interfaces:

com.yahoo.component.Component, Comparable<com.yahoo.component.Component>

public class UniqueGroupingSearcher
extends Searcher

Implements 'unique' using a grouping expression. It doesn't work for multi-level sorting.

Author:

andreer

Field Summary

Fields

Modifier and Type	Field and Description
static com.yahoo.processing.request.CompoundName	PARAM_UNIQUE

Fields inherited from class com.yahoo.component.AbstractComponent

isDeconstructable

Constructor Summary

Constructors

Constructor and Description
UniqueGroupingSearcher()

Method Summary

Modifier and Type	Method and Description
Result	search(Query query, Execution execution) Implements the deprecated "unique" api for deduplication by using grouping.

Methods inherited from class com.yahoo.search.Searcher

ensureFilled, fill, getLogger, process, toString

Methods inherited from class com.yahoo.component.chain.ChainedComponent

getAnnotatedDependencies, getDefaultAnnotatedDependencies, getDependencies, initDependencies

Methods inherited from class com.yahoo.component.AbstractComponent

clone, compareTo, deconstruct, getClassName, getId, getIdString, hasInitializedId, initId, isDeconstructable, setIsDeconstructable

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

PARAM_UNIQUE

public static final com.yahoo.processing.request.CompoundName PARAM_UNIQUE

Constructor Detail

UniqueGroupingSearcher

public UniqueGroupingSearcher()

Method Detail

search

public Result search(Query query,
                     Execution execution)

Implements the deprecated "unique" api for deduplication by using grouping. We create a grouping expression on the field we wish to dedup on (which must be an attribute). Total hits is calculated using the new count unique groups functionality.

Specified by:

search in class Searcher

Parameters:

query - the query

Returns:

the result of making this query