com.mongodb

类 WriteResult

java.lang.Object

com.mongodb.WriteResult

public class WriteResult
extends java.lang.Object

This class lets you access the results of the previous acknowledged write. If the write was unacknowledged, all property access methods will throw UnsupportedOperationException.

另请参阅:

WriteConcern.UNACKNOWLEDGED

构造器概要

构造器

构造器和说明
WriteResult(int n, boolean updateOfExisting, java.lang.Object upsertedId) Construct a new instance.

方法概要

限定符和类型	方法和说明
int	getN() Gets the "n" field, which contains the number of documents affected in the write operation.
java.lang.Object	getUpsertedId() Gets the _id value of an upserted document that resulted from this write.
boolean	isUpdateOfExisting() Returns true if this write resulted in an update of an existing document.
java.lang.String	toString()
static WriteResult	unacknowledged() Gets an instance representing an unacknowledged write.
boolean	wasAcknowledged() Returns true if the write was acknowledged.

从类继承的方法 java.lang.Object

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

构造器详细资料

WriteResult

public WriteResult(int n,
                   boolean updateOfExisting,
                   java.lang.Object upsertedId)

Construct a new instance.

参数:

n - the number of existing documents affected by this operation

updateOfExisting - true if the operation was an update and an existing document was updated

upsertedId - the _id of a document that was upserted by this operation

方法详细资料

unacknowledged

public static WriteResult unacknowledged()

Gets an instance representing an unacknowledged write.

返回:

an instance representing an unacknowledged write

从以下版本开始:

3.0

wasAcknowledged

public boolean wasAcknowledged()

Returns true if the write was acknowledged.

返回:

true if the write was acknowledged

从以下版本开始:

3.0

另请参阅:

WriteConcern.UNACKNOWLEDGED

getN

public int getN()

Gets the "n" field, which contains the number of documents affected in the write operation.

返回:

the value of the "n" field

抛出:

java.lang.UnsupportedOperationException - if the write was unacknowledged

另请参阅:

WriteConcern.UNACKNOWLEDGED

getUpsertedId

public java.lang.Object getUpsertedId()

Gets the _id value of an upserted document that resulted from this write. Note that for MongoDB servers prior to version 2.6, this method will return null unless the _id of the upserted document was of type ObjectId.

返回:

the value of the _id of an upserted document

抛出:

java.lang.UnsupportedOperationException - if the write was unacknowledged

从以下版本开始:

2.12

isUpdateOfExisting

public boolean isUpdateOfExisting()

Returns true if this write resulted in an update of an existing document.

返回:

whether the write resulted in an update of an existing document.

抛出:

java.lang.UnsupportedOperationException - if the write was unacknowledged

从以下版本开始:

2.12

toString

public java.lang.String toString()

覆盖:

toString 在类中 java.lang.Object