com.mongodb

类 DBRef

java.lang.Object

com.mongodb.DBRef

所有已实现的接口:

java.io.Serializable

public class DBRef
extends java.lang.Object
implements java.io.Serializable

A representation of a database reference.

另请参阅:

序列化表格

MongoDB documentation

Database References

构造器概要

构造器

构造器和说明
DBRef(java.lang.String collectionName, java.lang.Object id) Construct an instance.
DBRef(java.lang.String databaseName, java.lang.String collectionName, java.lang.Object id) Construct an instance.

方法概要

限定符和类型	方法和说明
boolean	equals(java.lang.Object o)
java.lang.String	getCollectionName() Gets the name of the collection in which the referenced document is stored.
java.lang.String	getDatabaseName() Gets the name of the database in which the referenced document is stored.
java.lang.Object	getId() Gets the _id of the referenced document
int	hashCode()
java.lang.String	toString()

从类继承的方法 java.lang.Object

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

构造器详细资料

DBRef

public DBRef(java.lang.String collectionName,
             java.lang.Object id)

Construct an instance.

参数:

collectionName - the name of the collection where the document is stored

id - the object id

DBRef

public DBRef(java.lang.String databaseName,
             java.lang.String collectionName,
             java.lang.Object id)

Construct an instance.

参数:

databaseName - the name of the database where the document is stored

collectionName - the name of the collection where the document is stored

id - the object id

从以下版本开始:

3.3

方法详细资料

getId

public java.lang.Object getId()

Gets the _id of the referenced document

返回:

the _id of the referenced document

getCollectionName

public java.lang.String getCollectionName()

Gets the name of the collection in which the referenced document is stored.

返回:

the name of the collection in which the referenced is stored

getDatabaseName

public java.lang.String getDatabaseName()

Gets the name of the database in which the referenced document is stored. A null value implies that the referenced document is stored in the same database as the referring document.

返回:

the possibly-null database name

从以下版本开始:

3.3

equals

public boolean equals(java.lang.Object o)

覆盖:

equals 在类中 java.lang.Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 java.lang.Object

toString

public java.lang.String toString()

覆盖:

toString 在类中 java.lang.Object