com.sequoiadb.base

类 DBCursor

java.lang.Object

com.sequoiadb.base.DBCursor

所有已实现的接口:

Closeable, AutoCloseable

public class DBCursor
extends Object
implements Closeable

Cursor of query result.

方法概要

限定符和类型	方法和说明
void	close() Close the cursor.
BSONObject	getCurrent() Get current document.
BSONObject	getNext() Get next document.
byte[]	getNextRaw() Get raw data of next record.
boolean	hasNext() Judge whether the next document exists or not.

从类继承的方法 java.lang.Object

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

方法详细资料

close

public void close()
           throws BaseException

Close the cursor.

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

抛出:

BaseException - If error happens.

getCurrent

public BSONObject getCurrent()
                      throws BaseException

Get current document. Calling this function after the cursor have been closed will throw BaseException with error SDB_RTN_CONTEXT_NOTEXIST

返回:

the current data or null if the cursor is empty

抛出:

BaseException - If error happens.

getNext

public BSONObject getNext()
                   throws BaseException

Get next document. Calling this function after the cursor have been closed will throw BaseException with error SDB_RTN_CONTEXT_NOTEXIST

返回:

the next data or null if the cursor is empty or the cursor is closed

抛出:

BaseException - If error happens.

getNextRaw

public byte[] getNextRaw()
                  throws BaseException

Get raw data of next record. Calling this function after the cursor have been closed will throw BaseException with error SDB_RTN_CONTEXT_NOTEXIST

返回:

a byte array of raw data of next record or null if the cursor is empty

抛出:

BaseException - If error happens.

hasNext

public boolean hasNext()
                throws BaseException

Judge whether the next document exists or not.

返回:

true for next data exists while false for not

抛出:

BaseException - If error happens.