SearchSpec.Builder


class SearchSpec.Builder


Builder for objects.

Summary

Public constructors

Constructs a new Builder for SearchSpec objects.

Builder(searchSpec: SearchSpec)

Constructs a new Builder from the given SearchSpec.

Public functions

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SCHEMA_EMBEDDING_PROPERTY_CONFIG)
addEmbeddingParameters(searchEmbeddings: Array<EmbeddingVector!>)

Adds an embedding search to SearchSpec Entry, which will be referred in the query expression and the ranking expression for embedding search.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SCHEMA_EMBEDDING_PROPERTY_CONFIG)
addEmbeddingParameters(
    searchEmbeddings: (Mutable)Collection<EmbeddingVector!>
)

Adds an embedding search to SearchSpec Entry, which will be referred in the query expression and the ranking expression for embedding search.

SearchSpec.Builder
addFilterDocumentClasses(documentClasses: Array<Class<Any!>!>)

Adds the Schema names of given document classes to the Schema type filter of SearchSpec Entry.

SearchSpec.Builder
addFilterDocumentClasses(
    documentClasses: (Mutable)Collection<Class<Any!>!>
)

Adds the Schema names of given document classes to the Schema type filter of SearchSpec Entry.

SearchSpec.Builder

Adds a namespace filter to SearchSpec Entry.

SearchSpec.Builder

Adds a namespace filter to SearchSpec Entry.

SearchSpec.Builder

Adds a package name filter to SearchSpec Entry.

SearchSpec.Builder

Adds a package name filter to SearchSpec Entry.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_FILTER_PROPERTIES)
addFilterProperties(
    documentClass: Class<Any!>,
    propertyPaths: (Mutable)Collection<String!>
)

Adds property paths for the specified type to the property filter of SearchSpec Entry.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_FILTER_PROPERTIES)
addFilterProperties(
    schema: String,
    propertyPaths: (Mutable)Collection<String!>
)

Adds property paths for the specified type to the property filter of SearchSpec Entry.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_FILTER_PROPERTIES)
addFilterPropertyPaths(
    documentClass: Class<Any!>,
    propertyPaths: (Mutable)Collection<PropertyPath!>
)

Adds property paths for the specified type to the property filter of SearchSpec Entry.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_FILTER_PROPERTIES)
addFilterPropertyPaths(
    schema: String,
    propertyPaths: (Mutable)Collection<PropertyPath!>
)

Adds property paths for the specified type to the property filter of SearchSpec Entry.

SearchSpec.Builder

Adds a Schema type filter to SearchSpec Entry.

SearchSpec.Builder

Adds a Schema type filter to SearchSpec Entry.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_INFORMATIONAL_RANKING_EXPRESSIONS)
addInformationalRankingExpressions(
    informationalRankingExpressions: Array<String!>
)

Adds informational ranking expressions to be evaluated for each document in the search result.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_INFORMATIONAL_RANKING_EXPRESSIONS)
addInformationalRankingExpressions(
    informationalRankingExpressions: (Mutable)Collection<String!>
)

Adds informational ranking expressions to be evaluated for each document in the search result.

SearchSpec.Builder
addProjection(schema: String, propertyPaths: (Mutable)Collection<String!>)

Adds property paths for the specified type to be used for projection.

SearchSpec.Builder
addProjectionPaths(
    schema: String,
    propertyPaths: (Mutable)Collection<PropertyPath!>
)

Adds property paths for the specified type to be used for projection.

SearchSpec.Builder
addProjectionPathsForDocumentClass(
    documentClass: Class<Any!>,
    propertyPaths: (Mutable)Collection<PropertyPath!>
)

Adds property paths for the specified Document class to be used for projection.

SearchSpec.Builder
addProjectionsForDocumentClass(
    documentClass: Class<Any!>,
    propertyPaths: (Mutable)Collection<String!>
)

Adds property paths for the Document class to be used for projection.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_SEARCH_STRING_PARAMETERS)
addSearchStringParameters(searchStringParameters: Array<String!>)

Adds Strings to the list of String parameters that can be referenced in the query through the "getSearchStringParameter({index})" function.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_SEARCH_STRING_PARAMETERS)
addSearchStringParameters(
    searchStringParameters: (Mutable)List<String!>
)

Adds Strings to the list of String parameters that can be referenced in the query through the "getSearchStringParameter({index})" function.

SearchSpec

Constructs a new SearchSpec from the contents of this builder.

SearchSpec.Builder

Clears the embedding parameters.

SearchSpec.Builder

Clears all namespace filters.

SearchSpec.Builder

Clears all package name filters.

SearchSpec.Builder

Clears the property filters for all schema types.

SearchSpec.Builder

Clears all schema type filters.

SearchSpec.Builder

Clears all informational ranking expressions.

SearchSpec.Builder

Clears the JoinSpec.

SearchSpec.Builder

Clears the projections for all schema types.

SearchSpec.Builder

Clears the property weights for all schema types.

SearchSpec.Builder

Clears the result grouping and limit.

SearchSpec.Builder

Clears the log tag that indicates the source of this search.

SearchSpec.Builder

Clears the list of String parameters that can be referenced in the query through the "getSearchStringParameter({index})" function.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SCHEMA_EMBEDDING_PROPERTY_CONFIG)
setDefaultEmbeddingSearchMetricType(
    defaultEmbeddingSearchMetricType: Int
)

Sets the default embedding metric type used for embedding search (see search) and ranking (see setRankingStrategy).

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.JOIN_SPEC_AND_QUALIFIED_ID)
setJoinSpec(joinSpec: JoinSpec)

Specifies which documents to join with, and how to join.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.LIST_FILTER_HAS_PROPERTY_FUNCTION)
setListFilterHasPropertyFunctionEnabled(enabled: Boolean)

Sets the LIST_FILTER_HAS_PROPERTY_FUNCTION feature as enabled/disabled according to the enabled parameter.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.LIST_FILTER_QUERY_LANGUAGE)
setListFilterQueryLanguageEnabled(enabled: Boolean)

Sets the LIST_FILTER_QUERY_LANGUAGE feature as enabled/disabled according to the enabled parameter.

SearchSpec.Builder
setMaxSnippetSize(maxSnippetSize: @IntRange(from = 0, to = 10000) Int)

Sets maxSnippetSize, the maximum snippet size.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.NUMERIC_SEARCH)
setNumericSearchEnabled(enabled: Boolean)

Sets the NUMERIC_SEARCH feature as enabled/disabled according to the enabled parameter.

SearchSpec.Builder
setOrder(order: Int)

Sets the order of returned search results, the default is ORDER_DESCENDING, meaning that results with higher scores come first.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_PROPERTY_WEIGHTS)
setPropertyWeightPaths(
    schemaType: String,
    propertyPathWeights: (Mutable)Map<PropertyPath!, Double!>
)

Sets property weights by schema type and property path.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_PROPERTY_WEIGHTS)
setPropertyWeightPathsForDocumentClass(
    documentClass: Class<Any!>,
    propertyPathWeights: (Mutable)Map<PropertyPath!, Double!>
)

Sets property weights by schema type and property path.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_PROPERTY_WEIGHTS)
setPropertyWeights(
    schemaType: String,
    propertyPathWeights: (Mutable)Map<String!, Double!>
)

Sets property weights by schema type and property path.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_PROPERTY_WEIGHTS)
setPropertyWeightsForDocumentClass(
    documentClass: Class<Any!>,
    propertyPathWeights: (Mutable)Map<String!, Double!>
)

Sets property weights by schema type and property path.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADVANCED_RANKING_EXPRESSION)
setRankingStrategy(advancedRankingExpression: String)

Enables advanced ranking to score based on advancedRankingExpression.

SearchSpec.Builder
setRankingStrategy(rankingStrategy: Int)

Sets ranking strategy for AppSearch results.

SearchSpec.Builder
setResultCountPerPage(
    resultCountPerPage: @IntRange(from = 0, to = 10000) Int
)

Sets the number of results per page in the returned object.

SearchSpec.Builder
setResultGrouping(groupingTypeFlags: Int, limit: Int)

Sets the maximum number of results to return for each group, where groups are defined by grouping type.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_SET_SEARCH_SOURCE_LOG_TAG)
setSearchSourceLogTag(searchSourceLogTag: String)

Sets an optional log tag to indicate the source of this search.

SearchSpec.Builder
setSnippetCount(snippetCount: @IntRange(from = 0, to = 10000) Int)

Sets the snippetCount such that the first snippetCount documents based on the ranking strategy will have snippet information provided.

SearchSpec.Builder
setSnippetCountPerProperty(
    snippetCountPerProperty: @IntRange(from = 0, to = 10000) Int
)

Sets snippetCountPerProperty.

SearchSpec.Builder
setTermMatch(termMatchType: Int)

Sets how the query terms should match TermMatchCode in the index.

SearchSpec.Builder
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.VERBATIM_SEARCH)
setVerbatimSearchEnabled(enabled: Boolean)

Sets the VERBATIM_SEARCH feature as enabled/disabled according to the enabled parameter.

Public constructors

Builder

Added in 1.1.0-alpha06
Builder()

Constructs a new Builder for SearchSpec objects.

Builder

Added in 1.1.0-alpha06
Builder(searchSpec: SearchSpec)

Constructs a new Builder from the given SearchSpec.

Public functions

addEmbeddingParameters

@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SCHEMA_EMBEDDING_PROPERTY_CONFIG)
fun addEmbeddingParameters(searchEmbeddings: Array<EmbeddingVector!>): SearchSpec.Builder

Adds an embedding search to SearchSpec Entry, which will be referred in the query expression and the ranking expression for embedding search.

addEmbeddingParameters

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SCHEMA_EMBEDDING_PROPERTY_CONFIG)
fun addEmbeddingParameters(
    searchEmbeddings: (Mutable)Collection<EmbeddingVector!>
): SearchSpec.Builder

Adds an embedding search to SearchSpec Entry, which will be referred in the query expression and the ranking expression for embedding search.

addFilterDocumentClasses

fun addFilterDocumentClasses(documentClasses: Array<Class<Any!>!>): SearchSpec.Builder

Adds the Schema names of given document classes to the Schema type filter of SearchSpec Entry. Only search for documents that have the specified schema types.

If unset, the query will search over all schema types.

Merged list available from getFilterSchemas.

Parameters
documentClasses: Array<Class<Any!>!>

classes annotated with Document.

addFilterDocumentClasses

Added in 1.1.0-alpha06
fun addFilterDocumentClasses(
    documentClasses: (Mutable)Collection<Class<Any!>!>
): SearchSpec.Builder

Adds the Schema names of given document classes to the Schema type filter of SearchSpec Entry. Only search for documents that have the specified schema types.

If unset, the query will search over all schema types.

Merged list available from getFilterSchemas.

Parameters
documentClasses: (Mutable)Collection<Class<Any!>!>

classes annotated with Document.

addFilterNamespaces

fun addFilterNamespaces(namespaces: Array<String!>): SearchSpec.Builder

Adds a namespace filter to SearchSpec Entry. Only search for documents that have the specified namespaces.

If unset, the query will search over all namespaces.

addFilterNamespaces

Added in 1.1.0-alpha06
fun addFilterNamespaces(namespaces: (Mutable)Collection<String!>): SearchSpec.Builder

Adds a namespace filter to SearchSpec Entry. Only search for documents that have the specified namespaces.

If unset, the query will search over all namespaces.

addFilterPackageNames

fun addFilterPackageNames(packageNames: Array<String!>): SearchSpec.Builder

Adds a package name filter to SearchSpec Entry. Only search for documents that were indexed from the specified packages.

If unset, the query will search over all packages that the caller has access to. If package names are specified which caller doesn't have access to, then those package names will be ignored.

addFilterPackageNames

Added in 1.1.0-alpha06
fun addFilterPackageNames(packageNames: (Mutable)Collection<String!>): SearchSpec.Builder

Adds a package name filter to SearchSpec Entry. Only search for documents that were indexed from the specified packages.

If unset, the query will search over all packages that the caller has access to. If package names are specified which caller doesn't have access to, then those package names will be ignored.

addFilterProperties

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_FILTER_PROPERTIES)
fun addFilterProperties(
    documentClass: Class<Any!>,
    propertyPaths: (Mutable)Collection<String!>
): SearchSpec.Builder

Adds property paths for the specified type to the property filter of SearchSpec Entry. Only returns documents that have matches under the specified properties. If property paths are added for a type, then only the properties referred to will be searched for results of that type.

Parameters
documentClass: Class<Any!>

class annotated with Document.

propertyPaths: (Mutable)Collection<String!>

The String version of PropertyPath. A dot-delimitedsequence of property names.

addFilterProperties

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_FILTER_PROPERTIES)
fun addFilterProperties(
    schema: String,
    propertyPaths: (Mutable)Collection<String!>
): SearchSpec.Builder

Adds property paths for the specified type to the property filter of SearchSpec Entry. Only returns documents that have matches under the specified properties. If property paths are added for a type, then only the properties referred to will be searched for results of that type.

If a property path that is specified isn't present in a result, it will be ignored for that result. Property paths cannot be null.

If no property paths are added for a particular type, then all properties of results of that type will be searched.

Example properties: 'body', 'sender.name', 'sender.emailaddress', etc.

If property paths are added for the SCHEMA_TYPE_WILDCARD, then those property paths will apply to all results, excepting any types that have their own, specific property paths set.

Parameters
schema: String

the AppSearchSchema that contains the target properties

propertyPaths: (Mutable)Collection<String!>

The String version of PropertyPath. A dot-delimited sequence of property names.

addFilterPropertyPaths

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_FILTER_PROPERTIES)
fun addFilterPropertyPaths(
    documentClass: Class<Any!>,
    propertyPaths: (Mutable)Collection<PropertyPath!>
): SearchSpec.Builder

Adds property paths for the specified type to the property filter of SearchSpec Entry. Only returns documents that have matches under the specified properties. If property paths are added for a type, then only the properties referred to will be searched for results of that type.

Parameters
documentClass: Class<Any!>

class annotated with Document.

propertyPaths: (Mutable)Collection<PropertyPath!>

The PropertyPath to search search over

addFilterPropertyPaths

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_FILTER_PROPERTIES)
fun addFilterPropertyPaths(
    schema: String,
    propertyPaths: (Mutable)Collection<PropertyPath!>
): SearchSpec.Builder

Adds property paths for the specified type to the property filter of SearchSpec Entry. Only returns documents that have matches under the specified properties. If property paths are added for a type, then only the properties referred to will be searched for results of that type.

Parameters
schema: String

the AppSearchSchema that contains the target properties

propertyPaths: (Mutable)Collection<PropertyPath!>

The PropertyPath to search search over

addFilterSchemas

fun addFilterSchemas(schemas: Array<String!>): SearchSpec.Builder

Adds a Schema type filter to SearchSpec Entry. Only search for documents that have the specified schema types.

If unset, the query will search over all schema types.

addFilterSchemas

Added in 1.1.0-alpha06
fun addFilterSchemas(schemas: (Mutable)Collection<String!>): SearchSpec.Builder

Adds a Schema type filter to SearchSpec Entry. Only search for documents that have the specified schema types.

If unset, the query will search over all schema types.

addInformationalRankingExpressions

@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_INFORMATIONAL_RANKING_EXPRESSIONS)
fun addInformationalRankingExpressions(
    informationalRankingExpressions: Array<String!>
): SearchSpec.Builder

Adds informational ranking expressions to be evaluated for each document in the search result. The values of these expressions will be returned to the caller via getInformationalRankingSignals. These expressions are purely for the caller to retrieve additional information about the result and have no effect on ranking.

The syntax is exactly the same as specified in setRankingStrategy.

addInformationalRankingExpressions

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADD_INFORMATIONAL_RANKING_EXPRESSIONS)
fun addInformationalRankingExpressions(
    informationalRankingExpressions: (Mutable)Collection<String!>
): SearchSpec.Builder

Adds informational ranking expressions to be evaluated for each document in the search result. The values of these expressions will be returned to the caller via getInformationalRankingSignals. These expressions are purely for the caller to retrieve additional information about the result and have no effect on ranking.

The syntax is exactly the same as specified in setRankingStrategy.

addProjection

Added in 1.1.0-alpha06
fun addProjection(schema: String, propertyPaths: (Mutable)Collection<String!>): SearchSpec.Builder

Adds property paths for the specified type to be used for projection. If property paths are added for a type, then only the properties referred to will be retrieved for results of that type. If a property path that is specified isn't present in a result, it will be ignored for that result. Property paths cannot be null.

Parameters
schema: String

a string corresponding to the schema to add projections to.

propertyPaths: (Mutable)Collection<String!>

the projections to add.

addProjectionPaths

Added in 1.1.0-alpha06
fun addProjectionPaths(
    schema: String,
    propertyPaths: (Mutable)Collection<PropertyPath!>
): SearchSpec.Builder

Adds property paths for the specified type to be used for projection. If property paths are added for a type, then only the properties referred to will be retrieved for results of that type. If a property path that is specified isn't present in a result, it will be ignored for that result. Property paths cannot be null.

If no property paths are added for a particular type, then all properties of results of that type will be retrieved.

If property path is added for the SCHEMA_TYPE_WILDCARD, then those property paths will apply to all results, excepting any types that have their own, specific property paths set.

Suppose the following document is in the index.

Email: Document {
  sender: Document {
    name: "Mr. Person"
    email: "mrperson123@google.com"
  }
  recipients: [
    Document {
      name: "John Doe"
      email: "johndoe123@google.com"
    }
    Document {
      name: "Jane Doe"
      email: "janedoe123@google.com"
    }
  ]
  subject: "IMPORTANT"
  body: "Limited time offer!"
}

Then, suppose that a query for "important" is issued with the following projection type property paths:

{schema: "Email", ["subject", "sender.name", "recipients.name"]}

The above document will be returned as:

Email: Document {
  sender: Document {
    name: "Mr. Body"
  }
  recipients: [
    Document {
      name: "John Doe"
    }
    Document {
      name: "Jane Doe"
    }
  ]
  subject: "IMPORTANT"
}
Parameters
schema: String

a string corresponding to the schema to add projections to.

propertyPaths: (Mutable)Collection<PropertyPath!>

the projections to add.

addProjectionPathsForDocumentClass

Added in 1.1.0-alpha06
fun addProjectionPathsForDocumentClass(
    documentClass: Class<Any!>,
    propertyPaths: (Mutable)Collection<PropertyPath!>
): SearchSpec.Builder

Adds property paths for the specified Document class to be used for projection.

Parameters
documentClass: Class<Any!>

a class, annotated with @Document, corresponding to the schema to add projections to.

propertyPaths: (Mutable)Collection<PropertyPath!>

the projections to add.

addProjectionsForDocumentClass

Added in 1.1.0-alpha06
fun addProjectionsForDocumentClass(
    documentClass: Class<Any!>,
    propertyPaths: (Mutable)Collection<String!>
): SearchSpec.Builder

Adds property paths for the Document class to be used for projection. If property paths are added for a document class, then only the properties referred to will be retrieved for results of that type. If a property path that is specified isn't present in a result, it will be ignored for that result. Property paths cannot be null.

Parameters
documentClass: Class<Any!>

a class, annotated with @Document, corresponding to the schema to add projections to.

propertyPaths: (Mutable)Collection<String!>

the projections to add.

See also
addProjection

addSearchStringParameters

@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_SEARCH_STRING_PARAMETERS)
fun addSearchStringParameters(searchStringParameters: Array<String!>): SearchSpec.Builder

Adds Strings to the list of String parameters that can be referenced in the query through the "getSearchStringParameter({index})" function.

See also
search

addSearchStringParameters

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_SEARCH_STRING_PARAMETERS)
fun addSearchStringParameters(
    searchStringParameters: (Mutable)List<String!>
): SearchSpec.Builder

Adds Strings to the list of String parameters that can be referenced in the query through the "getSearchStringParameter({index})" function.

See also
search

build

Added in 1.1.0-alpha06
fun build(): SearchSpec

Constructs a new SearchSpec from the contents of this builder.

Throws
java.lang.IllegalArgumentException

if property weights are provided with a ranking strategy that isn't RANKING_STRATEGY_RELEVANCE_SCORE.

java.lang.IllegalStateException

if the ranking strategy is RANKING_STRATEGY_JOIN_AGGREGATE_SCORE and setJoinSpec has never been called.

java.lang.IllegalStateException

if the aggregation scoring strategy has been set in getAggregationScoringStrategy but the ranking strategy is not RANKING_STRATEGY_JOIN_AGGREGATE_SCORE.

clearEmbeddingParameters

Added in 1.1.0-alpha06
fun clearEmbeddingParameters(): SearchSpec.Builder

Clears the embedding parameters.

clearFilterNamespaces

Added in 1.1.0-alpha06
fun clearFilterNamespaces(): SearchSpec.Builder

Clears all namespace filters.

clearFilterPackageNames

Added in 1.1.0-alpha06
fun clearFilterPackageNames(): SearchSpec.Builder

Clears all package name filters.

clearFilterProperties

Added in 1.1.0-alpha06
fun clearFilterProperties(): SearchSpec.Builder

Clears the property filters for all schema types.

clearFilterSchemas

Added in 1.1.0-alpha06
fun clearFilterSchemas(): SearchSpec.Builder

Clears all schema type filters.

clearInformationalRankingExpressions

Added in 1.1.0-alpha06
fun clearInformationalRankingExpressions(): SearchSpec.Builder

Clears all informational ranking expressions.

clearJoinSpec

Added in 1.1.0-alpha06
fun clearJoinSpec(): SearchSpec.Builder

Clears the JoinSpec.

clearProjections

Added in 1.1.0-alpha06
fun clearProjections(): SearchSpec.Builder

Clears the projections for all schema types.

clearPropertyWeights

Added in 1.1.0-alpha06
fun clearPropertyWeights(): SearchSpec.Builder

Clears the property weights for all schema types.

clearResultGrouping

Added in 1.1.0-alpha06
fun clearResultGrouping(): SearchSpec.Builder

Clears the result grouping and limit.

clearSearchSourceLogTag

Added in 1.1.0-alpha06
fun clearSearchSourceLogTag(): SearchSpec.Builder

Clears the log tag that indicates the source of this search.

clearSearchStringParameters

Added in 1.1.0-alpha06
fun clearSearchStringParameters(): SearchSpec.Builder

Clears the list of String parameters that can be referenced in the query through the "getSearchStringParameter({index})" function.

setDefaultEmbeddingSearchMetricType

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SCHEMA_EMBEDDING_PROPERTY_CONFIG)
fun setDefaultEmbeddingSearchMetricType(
    defaultEmbeddingSearchMetricType: Int
): SearchSpec.Builder

Sets the default embedding metric type used for embedding search (see search) and ranking (see setRankingStrategy).

If this method is not called, the default embedding search metric type is EMBEDDING_SEARCH_METRIC_TYPE_COSINE. Metrics specified within "semanticSearch" or "matchedSemanticScores" functions in search/ranking expressions will override this default.

setJoinSpec

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.JOIN_SPEC_AND_QUALIFIED_ID)
fun setJoinSpec(joinSpec: JoinSpec): SearchSpec.Builder

Specifies which documents to join with, and how to join.

If the ranking strategy is RANKING_STRATEGY_JOIN_AGGREGATE_SCORE, and the JoinSpec is null, build will throw an AppSearchException.

Parameters
joinSpec: JoinSpec

a specification on how to perform the Join operation.

setListFilterHasPropertyFunctionEnabled

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.LIST_FILTER_HAS_PROPERTY_FUNCTION)
fun setListFilterHasPropertyFunctionEnabled(enabled: Boolean): SearchSpec.Builder

Sets the LIST_FILTER_HAS_PROPERTY_FUNCTION feature as enabled/disabled according to the enabled parameter.

Parameters
enabled: Boolean

Enables the feature if true, otherwise disables it

If disabled, disallows the use of the "hasProperty" function. See search for more details about the function.

setListFilterQueryLanguageEnabled

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.LIST_FILTER_QUERY_LANGUAGE)
fun setListFilterQueryLanguageEnabled(enabled: Boolean): SearchSpec.Builder

Sets the LIST_FILTER_QUERY_LANGUAGE feature as enabled/disabled according to the enabled parameter.

Parameters
enabled: Boolean

Enables the feature if true, otherwise disables it. This feature covers the expansion of the query language to conform to the definition of the list filters language (https://aip.dev/160). This includes:

  • addition of explicit 'AND' and 'NOT' operators
  • property restricts are allowed with grouping (ex. "prop:(a OR b)")
  • addition of custom functions to control matching

The newly added custom functions covered by this feature are:

  • createList(String...)
  • termSearch(String, List<String>)

createList takes a variable number of strings and returns a list of strings. It is for use with termSearch.

termSearch takes a query string that will be parsed according to the supported query language and an optional list of strings that specify the properties to be restricted to. This exists as a convenience for multiple property restricts. So, for example, the query "(subject:foo OR body:foo) (subject:bar OR body:bar)" could be rewritten as "termSearch(\"foo bar\", createList(\"subject\", \"bar\"))"

setMaxSnippetSize

Added in 1.1.0-alpha06
fun setMaxSnippetSize(maxSnippetSize: @IntRange(from = 0, to = 10000) Int): SearchSpec.Builder

Sets maxSnippetSize, the maximum snippet size. Snippet windows start at maxSnippetSize/2 bytes before the middle of the matching token and end at maxSnippetSize/2 bytes after the middle of the matching token. It respects token boundaries, therefore the returned window may be smaller than requested.

Setting maxSnippetSize to 0 will disable windowing and an empty String will be returned. If matches enabled is also set to false, then snippeting is disabled.

For example, maxSnippetSize = 16. "foo bar baz bat rat" with a query of "baz" will return a window of "bar baz bat" which is only 11 bytes long.

setNumericSearchEnabled

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.NUMERIC_SEARCH)
fun setNumericSearchEnabled(enabled: Boolean): SearchSpec.Builder

Sets the NUMERIC_SEARCH feature as enabled/disabled according to the enabled parameter.

Parameters
enabled: Boolean

Enables the feature if true, otherwise disables it.

If disabled, disallows use of INDEXING_TYPE_RANGE and all other numeric querying features.

setOrder

Added in 1.1.0-alpha06
fun setOrder(order: Int): SearchSpec.Builder

Sets the order of returned search results, the default is ORDER_DESCENDING, meaning that results with higher scores come first.

This order field will be ignored if RankingStrategy = RANKING_STRATEGY_NONE.

setPropertyWeightPaths

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_PROPERTY_WEIGHTS)
fun setPropertyWeightPaths(
    schemaType: String,
    propertyPathWeights: (Mutable)Map<PropertyPath!, Double!>
): SearchSpec.Builder

Sets property weights by schema type and property path.

Property weights are used to promote and demote query term matches within a GenericDocument property when applying scoring.

Property weights must be positive values (greater than 0). A property's weight is multiplied with that property's scoring contribution. This means weights set between 0.0 and 1.0 demote scoring contributions by a term match within the property. Weights set above 1.0 promote scoring contributions by a term match within the property.

Properties that exist in the AppSearchSchema, but do not have a weight explicitly set will be given a default weight of 1.0.

Weights set for property paths that do not exist in the AppSearchSchema will be discarded and not affect scoring.

NOTE: Property weights only affect scoring for query-dependent scoring strategies, such as RANKING_STRATEGY_RELEVANCE_SCORE.

This information may not be available depending on the backend and Android API level. To ensure it is available, call isFeatureSupported.

Parameters
schemaType: String

the schema type to set property weights for.

propertyPathWeights: (Mutable)Map<PropertyPath!, Double!>

a Map of property paths of the schema type to the weight to set for that property.

Throws
java.lang.IllegalArgumentException

if a weight is equal to or less than 0.0.

setPropertyWeightPathsForDocumentClass

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_PROPERTY_WEIGHTS)
fun setPropertyWeightPathsForDocumentClass(
    documentClass: Class<Any!>,
    propertyPathWeights: (Mutable)Map<PropertyPath!, Double!>
): SearchSpec.Builder

Sets property weights by schema type and property path.

Property weights are used to promote and demote query term matches within a GenericDocument property when applying scoring.

Property weights must be positive values (greater than 0). A property's weight is multiplied with that property's scoring contribution. This means weights set between 0.0 and 1.0 demote scoring contributions by a term match within the property. Weights set above 1.0 promote scoring contributions by a term match within the property.

Properties that exist in the AppSearchSchema, but do not have a weight explicitly set will be given a default weight of 1.0.

Weights set for property paths that do not exist in the AppSearchSchema will be discarded and not affect scoring.

NOTE: Property weights only affect scoring for query-dependent scoring strategies, such as RANKING_STRATEGY_RELEVANCE_SCORE.

This information may not be available depending on the backend and Android API level. To ensure it is available, call isFeatureSupported.

Parameters
documentClass: Class<Any!>

a class, annotated with @Document, corresponding to the schema to set property weights for.

propertyPathWeights: (Mutable)Map<PropertyPath!, Double!>

a Map of property paths of the schema type to the weight to set for that property.

Throws
androidx.appsearch.exceptions.AppSearchException

if no factory for this document class could be found on the classpath

java.lang.IllegalArgumentException

if a weight is equal to or less than 0.0.

setPropertyWeights

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_PROPERTY_WEIGHTS)
fun setPropertyWeights(
    schemaType: String,
    propertyPathWeights: (Mutable)Map<String!, Double!>
): SearchSpec.Builder

Sets property weights by schema type and property path.

Property weights are used to promote and demote query term matches within a GenericDocument property when applying scoring.

Property weights must be positive values (greater than 0). A property's weight is multiplied with that property's scoring contribution. This means weights set between 0.0 and 1.0 demote scoring contributions by a term match within the property. Weights set above 1.0 promote scoring contributions by a term match within the property.

Properties that exist in the AppSearchSchema, but do not have a weight explicitly set will be given a default weight of 1.0.

Weights set for property paths that do not exist in the AppSearchSchema will be discarded and not affect scoring.

NOTE: Property weights only affect scoring for query-dependent scoring strategies, such as RANKING_STRATEGY_RELEVANCE_SCORE.

This information may not be available depending on the backend and Android API level. To ensure it is available, call isFeatureSupported.

Parameters
schemaType: String

the schema type to set property weights for.

propertyPathWeights: (Mutable)Map<String!, Double!>

a Map of property paths of the schema type to the weight to set for that property.

Throws
java.lang.IllegalArgumentException

if a weight is equal to or less than 0.0.

setPropertyWeightsForDocumentClass

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_PROPERTY_WEIGHTS)
fun setPropertyWeightsForDocumentClass(
    documentClass: Class<Any!>,
    propertyPathWeights: (Mutable)Map<String!, Double!>
): SearchSpec.Builder

Sets property weights by schema type and property path.

Property weights are used to promote and demote query term matches within a GenericDocument property when applying scoring.

Property weights must be positive values (greater than 0). A property's weight is multiplied with that property's scoring contribution. This means weights set between 0.0 and 1.0 demote scoring contributions by a term match within the property. Weights set above 1.0 promote scoring contributions by a term match within the property.

Properties that exist in the AppSearchSchema, but do not have a weight explicitly set will be given a default weight of 1.0.

Weights set for property paths that do not exist in the AppSearchSchema will be discarded and not affect scoring.

NOTE: Property weights only affect scoring for query-dependent scoring strategies, such as RANKING_STRATEGY_RELEVANCE_SCORE.

This information may not be available depending on the backend and Android API level. To ensure it is available, call isFeatureSupported.

Parameters
documentClass: Class<Any!>

a class, annotated with @Document, corresponding to the schema to set property weights for.

propertyPathWeights: (Mutable)Map<String!, Double!>

a Map of property paths of the schema type to the weight to set for that property.

Throws
androidx.appsearch.exceptions.AppSearchException

if no factory for this document class could be found on the classpath

java.lang.IllegalArgumentException

if a weight is equal to or less than 0.0.

setRankingStrategy

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_ADVANCED_RANKING_EXPRESSION)
fun setRankingStrategy(advancedRankingExpression: String): SearchSpec.Builder

Enables advanced ranking to score based on advancedRankingExpression.

This method will set RankingStrategy to RANKING_STRATEGY_ADVANCED_RANKING_EXPRESSION.

The ranking expression is a mathematical expression that will be evaluated to a floating-point number of double type representing the score of each document.

Numeric literals, arithmetic operators, mathematical functions, and document-based functions are supported to build expressions.

The following are supported arithmetic operators:

  • Addition(+)
  • Subtraction(-)
  • Multiplication(*)
  • Floating Point Division(/)

Operator precedences are compliant with the Java Language, and parentheses are supported. For example, "2.2 + (3 - 4) / 2" evaluates to 1.7.

The following are supported basic mathematical functions:

  • log(x) - the natural log of x
  • log(x, y) - the log of y with base x
  • pow(x, y) - x to the power of y
  • sqrt(x)
  • abs(x)
  • sin(x), cos(x), tan(x)
  • Example: "max(abs(-100), 10) + pow(2, 10)" will be evaluated to 1124

The following variadic mathematical functions are supported, with n >0. They also accept list value parameters. For example, if V is a value of list type, we can call sum(V) to get the sum of all the values in V. List literals are not supported, so a value of list type can only be constructed as a return value of some particular document-based functions.

  • max(v1, v2, ..., vn) or max(V)
  • min(v1, v2, ..., vn) or min(V)
  • len(v1, v2, ..., vn) or len(V)
  • sum(v1, v2, ..., vn) or sum(V)
  • avg(v1, v2, ..., vn) or avg(V)

Document-based functions must be called via "this", which represents the current document being scored. The following are supported document-based functions:

  • this.documentScore()

    Get the app-provided document score of the current document. This is the same score that is returned for RANKING_STRATEGY_DOCUMENT_SCORE.

  • this.creationTimestamp()

    Get the creation timestamp of the current document. This is the same score that is returned for RANKING_STRATEGY_CREATION_TIMESTAMP.

  • this.relevanceScore()

    Get the BM25F relevance score of the current document in relation to the query string. This is the same score that is returned for RANKING_STRATEGY_RELEVANCE_SCORE.

  • this.usageCount(type) and this.usageLastUsedTimestamp(type)

    Get the number of usages or the timestamp of last usage by type for the current document, where type must be evaluated to an integer from 1 to 2. Type 1 refers to usages reported by reportUsageAsync, and type 2 refers to usages reported by reportSystemUsageAsync.

  • this.childrenRankingSignals()

    Returns a list of children ranking signals calculated by scoring the joined documents using the ranking strategy specified in the nested SearchSpec. Currently, a document can only be a child of another document in the context of joins. If this function is called without the Join API enabled, a type error will be raised.

  • this.propertyWeights()

    Returns a list of the normalized weights of the matched properties for the current document being scored. Property weights come from what's specified in SearchSpec. After normalizing, each provided weight will be divided by the maximum weight, so that each of them will be <= 1.

  • this.matchedSemanticScores(getEmbeddingParameter({embedding_index}), {metric})

    Returns a list of the matched similarity scores from "semanticSearch" in the query expression (see also search) based on embedding_index and metric. If metric is omitted, it defaults to the metric specified in setDefaultEmbeddingSearchMetricType. If no "semanticSearch" is called for embedding_index and metric in the query, this function will return an empty list. If multiple "semanticSearch"s are called for the same embedding_index and metric, this function will return a list of their merged scores.

    Example: `this.matchedSemanticScores(getEmbeddingParameter(0), "COSINE")` will return a list of matched scores within the range of [0.5, 1], if `semanticSearch(getEmbeddingParameter(0), 0.5, 1, "COSINE")` is called in the query expression.

Some errors may occur when using advanced ranking.

Syntax Error: the expression violates the syntax of the advanced ranking language. Below are some examples.

  • "1 + " - missing operand
  • "2 * (1 + 2))" - unbalanced parenthesis
  • "2 ^ 3" - unknown operator

Type Error: the expression fails a static type check. Below are some examples.

  • "sin(2, 3)" - wrong number of arguments for the sin function
  • "this.childrenRankingSignals() + 1" - cannot add a list with a number
  • "this.propertyWeights()" - the final type of the overall expression cannot be a list, which can be fixed by "max(this.propertyWeights())"
  • "abs(this.propertyWeights())" - the abs function does not support list type arguments
  • "print(2)" - unknown function

Evaluation Error: an error occurred while evaluating the value of the expression. Below are some examples.

  • "1 / 0", "log(0)", "1 + sqrt(-1)" - getting a non-finite value in the middle of evaluation
  • "this.usageCount(1 + 0.5)" - expect the argument to be an integer. Note that this is not a type error and "this.usageCount(1.5 + 1/2)" can succeed without any issues
  • "this.documentScore()" - in case of an IO error, this will be an evaluation error

Syntax errors and type errors will fail the entire search and will cause getNextPageAsync to throw an AppSearchException with the result code of RESULT_INVALID_ARGUMENT.

Evaluation errors will result in the offending documents receiving the default score. For ORDER_DESCENDING, the default score will be 0, for ORDER_ASCENDING the default score will be infinity.

Parameters
advancedRankingExpression: String

a non-empty string representing the ranking expression.

setRankingStrategy

Added in 1.1.0-alpha06
fun setRankingStrategy(rankingStrategy: Int): SearchSpec.Builder

Sets ranking strategy for AppSearch results.

setResultCountPerPage

Added in 1.1.0-alpha06
fun setResultCountPerPage(
    resultCountPerPage: @IntRange(from = 0, to = 10000) Int
): SearchSpec.Builder

Sets the number of results per page in the returned object.

The default number of results per page is 10.

setResultGrouping

Added in 1.1.0-alpha06
fun setResultGrouping(groupingTypeFlags: Int, limit: Int): SearchSpec.Builder

Sets the maximum number of results to return for each group, where groups are defined by grouping type.

Calling this method will override any previous calls. So calling setResultGrouping(GROUPING_TYPE_PER_PACKAGE, 7) and then calling setResultGrouping(GROUPING_TYPE_PER_PACKAGE, 2) will result in only the latter, a limit of two results per package, being applied. Or calling setResultGrouping (GROUPING_TYPE_PER_PACKAGE, 1) and then calling setResultGrouping (GROUPING_TYPE_PER_PACKAGE | GROUPING_PER_NAMESPACE, 5) will result in five results per package per namespace.

Parameters
groupingTypeFlags: Int

One or more combination of grouping types.

limit: Int

Number of results to return per groupingTypeFlags.

Throws
java.lang.IllegalArgumentException

if groupingTypeFlags is zero.

setSearchSourceLogTag

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.SEARCH_SPEC_SET_SEARCH_SOURCE_LOG_TAG)
fun setSearchSourceLogTag(searchSourceLogTag: String): SearchSpec.Builder

Sets an optional log tag to indicate the source of this search.

Some AppSearch implementations may log a hash of this tag using statsd. This tag may be used for tracing performance issues and crashes to a component of an app.

Call this method and give a unique value if you want to distinguish this search scenario with other search scenarios during performance analysis.

Under no circumstances will AppSearch log the raw String value using statsd, but it will be provided as-is to custom AppSearchLogger implementations you have registered in your app.

Parameters
searchSourceLogTag: String

A String to indicate the source caller of this search. It is used to label the search statsd for performance analysis. It is not the tag we are using in android.util.Log. The length of the teg should between 1 and 100.

setSnippetCount

Added in 1.1.0-alpha06
fun setSnippetCount(snippetCount: @IntRange(from = 0, to = 10000) Int): SearchSpec.Builder

Sets the snippetCount such that the first snippetCount documents based on the ranking strategy will have snippet information provided.

The list returned from getMatchInfos will contain at most this many entries.

If set to 0 (default), snippeting is disabled and the list returned from getMatchInfos will be empty.

setSnippetCountPerProperty

Added in 1.1.0-alpha06
fun setSnippetCountPerProperty(
    snippetCountPerProperty: @IntRange(from = 0, to = 10000) Int
): SearchSpec.Builder

Sets snippetCountPerProperty. Only the first snippetCountPerProperty snippets for each property of each GenericDocument will contain snippet information.

If set to 0, snippeting is disabled and the list returned from getMatchInfos will be empty.

The default behavior is to snippet all matches a property contains, up to the maximum value of 10,000.

setTermMatch

Added in 1.1.0-alpha06
fun setTermMatch(termMatchType: Int): SearchSpec.Builder

Sets how the query terms should match TermMatchCode in the index.

If this method is not called, the default term match type is TERM_MATCH_PREFIX.

setVerbatimSearchEnabled

Added in 1.1.0-alpha06
@RequiresFeature(enforcement = "androidx.appsearch.app.Features#isFeatureSupported", name = Features.VERBATIM_SEARCH)
fun setVerbatimSearchEnabled(enabled: Boolean): SearchSpec.Builder

Sets the VERBATIM_SEARCH feature as enabled/disabled according to the enabled parameter.

Parameters
enabled: Boolean

Enables the feature if true, otherwise disables it

If disabled, disallows use of TOKENIZER_TYPE_VERBATIM and all other verbatim search features within the query language that allows clients to search using the verbatim string operator.

For example, The verbatim string operator '"foo/bar" OR baz' will ensure that 'foo/bar' is treated as a single 'verbatim' token.