cn.leancloud

类 AVRelation<T extends AVObject>

java.lang.Object

cn.leancloud.AVRelation<T>

public class AVRelation<T extends AVObject>
extends Object

构造器概要

构造器

构造器和说明
AVRelation()
AVRelation(AVObject parent, String key)
AVRelation(String targetClass)

方法概要

限定符和类型	方法和说明
void	add(T object) Adds an object to this relation.
void	addAll(Collection<T> objects) Adds many objects to this relation.
String	getKey()
AVObject	getParent()
AVQuery<T>	getQuery() Gets a query that can be used to query the objects in this relation.
AVQuery<T>	getQuery(Class<T> clazz) Gets a query that can be used to query the subclass objects in this relation.
String	getTargetClass()
void	remove(AVObject object) Removes an object from this relation.
static <M extends AVObject> AVQuery<M>	reverseQuery(Class<M> theParentClazz, String relationKey, AVObject child) Create a query that can be used to query the parent objects in this relation.
static <M extends AVObject> AVQuery<M>	reverseQuery(String parentClassName, String relationKey, AVObject child) Create a query that can be used to query the parent objects in this relation.
void	setKey(String key)
void	setParent(AVObject parent)
void	setTargetClass(String targetClass)

从类继承的方法 java.lang.Object

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

构造器详细资料

AVRelation

public AVRelation()

AVRelation

public AVRelation(AVObject parent,
                  String key)

AVRelation

public AVRelation(String targetClass)

方法详细资料

getKey

public String getKey()

setKey

public void setKey(String key)

getParent

public AVObject getParent()

setParent

public void setParent(AVObject parent)

getTargetClass

public String getTargetClass()

setTargetClass

public void setTargetClass(String targetClass)

add

public void add(T object)

Adds an object to this relation.

参数:

object - The object to add to this relation.

addAll

public void addAll(Collection<T> objects)

Adds many objects to this relation.

参数:

objects - The objects to add to this relation.

remove

public void remove(AVObject object)

Removes an object from this relation.

参数:

object - The object to remove from this relation.

getQuery

public AVQuery<T> getQuery()

Gets a query that can be used to query the objects in this relation.

返回:

A AVQuery that restricts the results to objects in this relations.

getQuery

public AVQuery<T> getQuery(Class<T> clazz)

Gets a query that can be used to query the subclass objects in this relation.

参数:

clazz - The AVObject subclass.

返回:

A AVQuery that restricts the results to objects in this relations.

reverseQuery

public static <M extends AVObject> AVQuery<M> reverseQuery(String parentClassName,
                                                           String relationKey,
                                                           AVObject child)

Create a query that can be used to query the parent objects in this relation.

参数:

parentClassName - The parent class name

relationKey - The relation field key in parent

child - The child object.

返回:

A AVQuery that restricts the results to parent objects in this relations.

reverseQuery

public static <M extends AVObject> AVQuery<M> reverseQuery(Class<M> theParentClazz,
                                                           String relationKey,
                                                           AVObject child)

Create a query that can be used to query the parent objects in this relation.

参数:

theParentClazz - The parent subclass.

relationKey - The relation field key in parent

child - The child object.

返回:

A AVQuery that restricts the results to parent objects in this relations.