程序包 ohos.data.dataability

类 DataAbilityUtils

java.lang.Object

ohos.data.dataability.DataAbilityUtils

public class DataAbilityUtils
extends Object

A utility class that provides static methods for database operations.

This class provides interfaces to create OrmPredicates and RdbPredicates objects from the DataAbilityPredicates object.

从以下版本开始:

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SystemCapability

SystemCapability.Data#DATA_APPDATAMGR

方法概要

限定符和类型	方法	说明
static <T extends OrmObject> OrmPredicates	createOrmPredicates(DataAbilityPredicates dataAbilityPredicates, Class<T> klass)	Creates an OrmPredicates object from a DataAbilityPredicates object.
static RdbPredicates	createRdbPredicates(DataAbilityPredicates dataAbilityPredicates, String tableName)	Creates an RdbPredicates object from a DataAbilityPredicates object.

从类继承的方法 java.lang.Object

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

方法详细资料

createRdbPredicates

public static RdbPredicates createRdbPredicates(DataAbilityPredicates dataAbilityPredicates,
                                                String tableName)

Creates an RdbPredicates object from a DataAbilityPredicates object.

The RdbPredicates object can be used to perform database operations.

参数:

dataAbilityPredicates - Indicates the DataAbilityPredicates object used to create the RdbPredicates object.

tableName - Indicates the table name.

返回:

Returns the RdbPredicates object.

抛出:

IllegalArgumentException - Throws this exception if tableName is null or the RdbPredicates object cannot be created from the DataAbilityPredicates object.

从以下版本开始:

1

createOrmPredicates

public static <T extends OrmObject> OrmPredicates createOrmPredicates(DataAbilityPredicates dataAbilityPredicates,
                                                                      Class<T> klass)

Creates an OrmPredicates object from a DataAbilityPredicates object.

The OrmPredicates object can be used to perform database operations.

参数:

dataAbilityPredicates - Indicates the DataAbilityPredicates object used to create the OrmPredicates object.

klass - Indicates the class.

返回:

Returns the OrmPredicates object.

抛出:

IllegalArgumentException - Throws this exception if klass is null or the OrmPredicates object cannot be created from the DataAbilityPredicates object.

从以下版本开始:

1