com.avos.avoscloud

Class AVRelation<T extends AVObject>

java.lang.Object

com.avos.avoscloud.AVRelation<T>

public class AVRelation<T extends AVObject>
extends Object

A class that is used to access all of the children of a many-to-many relationship. Each instance of AVOSCloud.Relation is associated with a particular parent object and key.

Constructor Summary

Constructors

Constructor and Description
AVRelation()

Method Summary

Modifier and Type	Method and Description
void	add(T object) Adds an object to this relation.
void	addAll(Collection<T> objects) Adds many parse 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	setTargetClass(String newTargetClass) 当targetClass为null时，手动设置targetClass值

Methods inherited from class java.lang.Object

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

Constructor Detail

AVRelation

public AVRelation()

Method Detail

add

public void add(T object)

Adds an object to this relation.

Parameters:

object - The object to add to this relation.

addAll

public void addAll(Collection<T> objects)

Adds many parse objects to this relation.

Parameters:

objects - The objects to add to this relation.

remove

public void remove(AVObject object)

Removes an object from this relation.

Parameters:

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.

Returns:

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.

Parameters:

clazz - The AVObject subclass.

Returns:

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.

Parameters:

parentClassName - The parent class name

relationKey - The relation field key in parent

child - The child object.

Returns:

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.

Parameters:

theParentClazz - The parent subclass.

relationKey - The relation field key in parent

child - The child object.

Returns:

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

getKey

public String getKey()

getParent

public AVObject getParent()

setTargetClass

public void setTargetClass(String newTargetClass)

当targetClass为null时，手动设置targetClass值

getTargetClass

public String getTargetClass()