程序包 ohos.data.orm

类 OrmObject

java.lang.Object

ohos.data.orm.OrmObject

public class OrmObject
extends Object

Represents entities in the object-relational mapping (ORM) database.

A row in a relational database (RDB) table corresponds to an entity in the ORM database. Before operating entities in the ORM database, you need to create an entity class that inherits from OrmObject and annotate it with @Entity.

从以下版本开始:

1

另请参阅:

OrmDatabase

SystemCapability

SystemCapability.Data#DATA_APPDATAMGR

构造器概要

构造器

构造器	说明
OrmObject()

方法概要

限定符和类型	方法	说明
boolean	equals(Object object)	Checks whether an OrmObject is equal to the current OrmObject.
long	getRowId()	Obtains the row corresponding to an OrmObject instance in the RDB table.
int	hashCode()	Obtains the hash code value of an OrmObject.
void	setRowId(long rowId)	Sets the row corresponding to an OrmObject instance in the RDB table.

从类继承的方法 java.lang.Object

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

构造器详细资料

OrmObject

public OrmObject()

方法详细资料

getRowId

public long getRowId()

Obtains the row corresponding to an OrmObject instance in the RDB table.

返回:

Returns the row corresponding to the OrmObject instance.

从以下版本开始:

1

setRowId

public void setRowId(long rowId)

Sets the row corresponding to an OrmObject instance in the RDB table.

参数:

rowId - Indicates the ID of the row corresponding to the OrmObject instance.

从以下版本开始:

1

equals

public boolean equals(Object object)

Checks whether an OrmObject is equal to the current OrmObject.

覆盖:

equals 在类中 Object

参数:

object - Indicates the OrmObject to compare with the current OrmObject.

返回:

Returns true if the rowId and objectId of the two OrmObject objects are equal; returns false otherwise.

从以下版本开始:

1

另请参阅:

Object.hashCode(), HashMap

hashCode

public int hashCode()

Obtains the hash code value of an OrmObject.

The hash code value is generated by rowId and objectId of the OrmObject.

覆盖:

hashCode 在类中 Object

返回:

Returns the hash code value of the OrmObject.

从以下版本开始:

1

另请参阅:

Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)