com.mongodb

类 ReflectionDBObject

java.lang.Object

com.mongodb.ReflectionDBObject

所有已实现的接口:

DBObject, BSONObject

public abstract class ReflectionDBObject
extends java.lang.Object
implements DBObject

This class enables to map simple Class fields to a BSON object fields

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ReflectionDBObject.JavaWrapper Represents a wrapper around the DBObject to interface with the Class fields

构造器概要

构造器

构造器和说明
ReflectionDBObject()

方法概要

限定符和类型	方法和说明
boolean	containsField(java.lang.String fieldName) Checks if this object contains a field with the given name.
boolean	containsKey(java.lang.String key) 已过时。
java.lang.Object	get_id() Gets the _id
java.lang.Object	get(java.lang.String key) Gets a field from this object by a given name.
static ReflectionDBObject.JavaWrapper	getWrapper(java.lang.Class c) Returns an existing Wrapper instance associated with a class, or creates a new one.
static ReflectionDBObject.JavaWrapper	getWrapperIfReflectionObject(java.lang.Class c) Returns the wrapper if this object can be assigned from this class.
boolean	isPartialObject() Whether DBObject.markAsPartialObject() was ever called only matters if you are going to upsert and do not want to risk losing fields.
java.util.Set<java.lang.String>	keySet() Returns this object's fields' names
void	markAsPartialObject() ReflectionDBObjects can't be partial.
java.lang.Object	put(java.lang.String key, java.lang.Object v) Sets a name/value pair in this object.
void	putAll(BSONObject o) Sets all key/value pairs from an object into this object
void	putAll(java.util.Map m) Sets all key/value pairs from a map into this object
java.lang.Object	removeField(java.lang.String key) This operation is not supported.
void	set_id(java.lang.Object id) Sets the _id
java.util.Map	toMap() Returns a map representing this BSONObject.

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

ReflectionDBObject

public ReflectionDBObject()

方法详细资料

get

public java.lang.Object get(java.lang.String key)

从接口复制的说明: BSONObject

Gets a field from this object by a given name.

指定者:

get 在接口中 BSONObject

参数:

key - The name of the field fetch

返回:

The field, if found

keySet

public java.util.Set<java.lang.String> keySet()

从接口复制的说明: BSONObject

Returns this object's fields' names

指定者:

keySet 在接口中 BSONObject

返回:

The names of the fields in this object

containsKey

@Deprecated
public boolean containsKey(java.lang.String key)

已过时。

从接口复制的说明: BSONObject

Deprecated

指定者:

containsKey 在接口中 BSONObject

参数:

key - the key to check

返回:

True if the key is present

containsField

public boolean containsField(java.lang.String fieldName)

从接口复制的说明: BSONObject

Checks if this object contains a field with the given name.

指定者:

containsField 在接口中 BSONObject

参数:

fieldName - Field name for which to check

返回:

True if the field is present

put

public java.lang.Object put(java.lang.String key,
                            java.lang.Object v)

从接口复制的说明: BSONObject

Sets a name/value pair in this object.

指定者:

put 在接口中 BSONObject

参数:

key - Name to set

v - Corresponding value

返回:

the previous value associated with key, or null if there was no mapping for key. (A null return can also indicate that the map previously associated null with key.)

putAll

public void putAll(java.util.Map m)

从接口复制的说明: BSONObject

Sets all key/value pairs from a map into this object

指定者:

putAll 在接口中 BSONObject

参数:

m - the map

putAll

public void putAll(BSONObject o)

从接口复制的说明: BSONObject

Sets all key/value pairs from an object into this object

指定者:

putAll 在接口中 BSONObject

参数:

o - the object

get_id

public java.lang.Object get_id()

Gets the _id

返回:

the _id of this document

set_id

public void set_id(java.lang.Object id)

Sets the _id

参数:

id - the unique identifier for this DBObject

isPartialObject

public boolean isPartialObject()

从接口复制的说明: DBObject

Whether DBObject.markAsPartialObject() was ever called only matters if you are going to upsert and do not want to risk losing fields.

指定者:

isPartialObject 在接口中 DBObject

返回:

true if this has been marked as a partial object

toMap

public java.util.Map toMap()

从接口复制的说明: BSONObject

Returns a map representing this BSONObject.

指定者:

toMap 在接口中 BSONObject

返回:

the map

markAsPartialObject

public void markAsPartialObject()

ReflectionDBObjects can't be partial. This operation is not supported.

指定者:

markAsPartialObject 在接口中 DBObject

抛出:

java.lang.RuntimeException - ReflectionDBObjects can't be partial

removeField

public java.lang.Object removeField(java.lang.String key)

This operation is not supported.

指定者:

removeField 在接口中 BSONObject

参数:

key - The name of the field to remove

返回:

The value removed from this object

抛出:

java.lang.UnsupportedOperationException - can't remove from a ReflectionDBObject

getWrapperIfReflectionObject

public static ReflectionDBObject.JavaWrapper getWrapperIfReflectionObject(java.lang.Class c)

Returns the wrapper if this object can be assigned from this class.

参数:

c - the class to be wrapped

返回:

the wrapper

getWrapper

public static ReflectionDBObject.JavaWrapper getWrapper(java.lang.Class c)

Returns an existing Wrapper instance associated with a class, or creates a new one.

参数:

c - the class to be wrapped

返回:

the wrapped