@@ -6,25 +6,24 @@ A Data ability helps applications manage access to data stored by themselves and
...
@@ -6,25 +6,24 @@ A Data ability helps applications manage access to data stored by themselves and
Data ability providers can customize data access-related APIs such as data inserting, deleting, updating, and querying, as well as file opening, and share data with other applications through these open APIs.
Data ability providers can customize data access-related APIs such as data inserting, deleting, updating, and querying, as well as file opening, and share data with other applications through these open APIs.
## Available APIs
## Available APIs
**Table 1** Data ability lifecycle APIs
**Table 1** Data ability lifecycle APIs
|API|Description|
|API|Description|
|:------|:------|
|:------|:------|
|onInitialized?(info: AbilityInfo): void|Called during ability initialization to initialize the relational database (RDB).|
|onInitialized(info: AbilityInfo): void|Called during ability initialization to initialize the relational database (RDB).|
|update?(uri: string, valueBucket: rdb.ValuesBucket, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<number>): void|Updates data in the database.|
|update(uri: string, valueBucket: rdb.ValuesBucket, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<number>): void|Updates data in the database.|
|query?(uri: string, columns: Array\<string>, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<ResultSet>): void|Queries data in the database.|
|query(uri: string, columns: Array\<string>, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<ResultSet>): void|Queries data in the database.|
|delete?(uri: string, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<number>): void|Deletes one or more data records from the database.|
|delete(uri: string, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<number>): void|Deletes one or more data records from the database.|
|normalizeUri?(uri: string, callback: AsyncCallback\<string>): void|Normalizes the URI. A normalized URI applies to cross-device use, persistence, backup, and restore. When the context changes, it ensures that the same data item can be referenced.|
|normalizeUri(uri: string, callback: AsyncCallback\<string>): void|Normalizes the URI. A normalized URI applies to cross-device use, persistence, backup, and restore. When the context changes, it ensures that the same data item can be referenced.|
|batchInsert?(uri: string, valueBuckets: Array\<rdb.ValuesBucket>, callback: AsyncCallback\<number>): void|Inserts multiple data records into the database.|
|batchInsert(uri: string, valueBuckets: Array\<rdb.ValuesBucket>, callback: AsyncCallback\<number>): void|Inserts multiple data records into the database.|
|denormalizeUri?(uri: string, callback: AsyncCallback\<string>): void|Converts a normalized URI generated by **normalizeUri** into a denormalized URI.|
|denormalizeUri(uri: string, callback: AsyncCallback\<string>): void|Converts a normalized URI generated by **normalizeUri** into a denormalized URI.|
|insert?(uri: string, valueBucket: rdb.ValuesBucket, callback: AsyncCallback\<number>): void|Inserts a data record into the database.|
|insert(uri: string, valueBucket: rdb.ValuesBucket, callback: AsyncCallback\<number>): void|Inserts a data record into the database.|
|openFile?(uri: string, mode: string, callback: AsyncCallback\<number>): void|Opens a file.|
|openFile(uri: string, mode: string, callback: AsyncCallback\<number>): void|Opens a file.|
|getFileTypes?(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Array\<string>>): void|Obtains the MIME type of a file.|
|getFileTypes(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Array\<string>>): void|Obtains the MIME type of a file.|
|getType?(uri: string, callback: AsyncCallback\<string>): void|Obtains the MIME type matching the data specified by the URI.|
|getType(uri: string, callback: AsyncCallback\<string>): void|Obtains the MIME type matching the data specified by the URI.|
|executeBatch?(ops: Array\<DataAbilityOperation>, callback: AsyncCallback\<Array\<DataAbilityResult>>): void|Operates data in the database in batches.|
|executeBatch(ops: Array\<DataAbilityOperation>, callback: AsyncCallback\<Array\<DataAbilityResult>>): void|Operates data in the database in batches.|