Builder for objects
.
Public Constructor Summary
Public Method Summary
JoinSpec | |
JoinSpec.Builder |
setAggregationScoringStrategy(int aggregationScoringStrategy)
Sets how we derive a single score from a list of joined documents.
|
JoinSpec.Builder |
setMaxJoinedResultCount(int maxJoinedResultCount)
Sets the max amount of
SearchResults
to return with the parent document, with a default of 10 SearchResults.
|
JoinSpec.Builder |
setNestedSearch(String nestedQuery,
SearchSpec
nestedSearchSpec)
Sets the query and the SearchSpec for the documents being joined.
|
Inherited Method Summary
Public Constructors
public Builder (String childPropertyExpression)
Create a specification for the joining operation in search.
The child property expressions Specifies how to join documents. Documents with a child property expression equal to the qualified id of the parent will be retrieved.
Property expressions differ from PropertyPath
as property expressions may refer to document properties or nested document properties
such as "person.business.id" as well as a property expression. Currently the only
property expression is "this.qualifiedId()". PropertyPath
objects may only reference document properties and nested document properties.
In order to join a child document to a parent document, the child document must contain the parent's qualified id at the property expression specified by this method.
Parameters
childPropertyExpression | the property to match in the child documents. |
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Public Methods
public JoinSpec.Builder setAggregationScoringStrategy (int aggregationScoringStrategy)
Sets how we derive a single score from a list of joined documents.
The default scoring strategy is
JoinSpec.AGGREGATION_SCORING_OUTER_RESULT_RANKING_SIGNAL
, which specifies
that the ranking signal of the outer parent document will be used.
public JoinSpec.Builder setMaxJoinedResultCount (int maxJoinedResultCount)
Sets the max amount of SearchResults
to return with the parent document, with a default of 10 SearchResults.
This does NOT limit the number of results that are joined with the parent document
for scoring. This means that, when set, only a maximum of
maxJoinedResultCount
results will be returned with each parent document,
but all results that are joined with a parent will factor into the score.
public JoinSpec.Builder setNestedSearch (String nestedQuery, SearchSpec nestedSearchSpec)
Sets the query and the SearchSpec for the documents being joined. This will score and rank the joined documents as well as filter the joined documents.
If
SearchSpec.RANKING_STRATEGY_JOIN_AGGREGATE_SCORE
is set in the outer
SearchSpec
,
the resulting signals will be used to rank the parent documents. Note that the
aggregation strategy also needs to be set with
setAggregationScoringStrategy(int)
, otherwise the default will be
JoinSpec.AGGREGATION_SCORING_OUTER_RESULT_RANKING_SIGNAL
, which will just
use the parent documents ranking signal.
If this method is never called, JoinSpec.getNestedQuery()
will return an empty string, meaning we will join with every possible document that
matches the equality constraints and hasn't been filtered out by the type or namespace
filters.