程序包 com.mysql.cj.protocol.a.result

类 ResultsetRowsStreaming<T extends ProtocolEntity>

java.lang.Object

com.mysql.cj.protocol.a.result.AbstractResultsetRows

com.mysql.cj.protocol.a.result.ResultsetRowsStreaming<T>

类型参数:

T - ProtocolEntity type

所有已实现的接口:

ProtocolEntity, ResultsetRows, RowList, Iterator<Row>

public class ResultsetRowsStreaming<T extends ProtocolEntity>
extends AbstractResultsetRows
implements ResultsetRows

Provides streaming of Resultset rows. Each next row is consumed from the input stream only on next() call. Consumed rows are not cached thus we only stream result sets when they are forward-only, read-only, and the fetch size has been set to Integer.MIN_VALUE (rows are read one by one).

字段概要

从类继承的字段 com.mysql.cj.protocol.a.result.AbstractResultsetRows

BEFORE_START_OF_ROWS, currentPositionInFetchedRows, metadata, owner, rowFactory, wasEmpty

从接口继承的字段 com.mysql.cj.result.RowList

RESULT_SET_SIZE_UNKNOWN

构造器概要

构造器

构造器	说明
ResultsetRowsStreaming(NativeProtocol io, ColumnDefinition columnDefinition, boolean isBinaryEncoded, ProtocolEntityFactory<T,NativePacketPayload> resultSetFactory)	Creates a new RowDataDynamic object.

方法概要

修饰符和类型	方法	说明
void	afterLast()	Moves to after last.
void	beforeFirst()	Moves to before first.
void	beforeLast()	Moves to before last.
void	close()	We're done.
int	getPosition()	Returns the current position.
boolean	hasNext()
boolean	isAfterLast()	Returns true if we got the last element.
boolean	isBeforeFirst()	Returns if iteration has not occured yet.
boolean	isEmpty()	Has no records.
boolean	isFirst()	Are we on the first row of the result set?
boolean	isLast()	Are we on the last row of the result set?
void	moveRowRelative(int rows)	Moves the current position relative 'rows' from the current position.
Row	next()
void	setCurrentRow(int rowNumber)	Moves the current position in the result set to the given row number.

从类继承的方法 com.mysql.cj.protocol.a.result.AbstractResultsetRows

getMetadata, getOwner, setMetadata, setOwner, wasEmpty

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.util.Iterator

forEachRemaining, remove

从接口继承的方法 com.mysql.cj.protocol.ResultsetRows

addRow, getMetadata, getOwner, isDynamic, setMetadata, setOwner, wasEmpty

从接口继承的方法 com.mysql.cj.result.RowList

get, previous, size

构造器详细资料

ResultsetRowsStreaming

public ResultsetRowsStreaming(NativeProtocol io,
                              ColumnDefinition columnDefinition,
                              boolean isBinaryEncoded,
                              ProtocolEntityFactory<T,NativePacketPayload> resultSetFactory)

Creates a new RowDataDynamic object.

参数:

io - the connection to MySQL that this data is coming from

columnDefinition - the metadata that describe this data

isBinaryEncoded - is this data in native format?

resultSetFactory - ProtocolEntityFactory

方法详细资料

close

public void close()

从接口复制的说明: ResultsetRows

We're done.

指定者:

close 在接口中 ResultsetRows

hasNext

public boolean hasNext()

指定者:

hasNext 在接口中 Iterator<T extends ProtocolEntity>

isAfterLast

public boolean isAfterLast()

从接口复制的说明: ResultsetRows

Returns true if we got the last element.

指定者:

isAfterLast 在接口中 ResultsetRows

返回:

true if after last row

isBeforeFirst

public boolean isBeforeFirst()

从接口复制的说明: ResultsetRows

Returns if iteration has not occured yet.

指定者:

isBeforeFirst 在接口中 ResultsetRows

返回:

true if before first row

isEmpty

public boolean isEmpty()

从接口复制的说明: ResultsetRows

Has no records.

指定者:

isEmpty 在接口中 ResultsetRows

返回:

true if no records

isFirst

public boolean isFirst()

从接口复制的说明: ResultsetRows

Are we on the first row of the result set?

指定者:

isFirst 在接口中 ResultsetRows

返回:

true if on first row

isLast

public boolean isLast()

从接口复制的说明: ResultsetRows

Are we on the last row of the result set?

指定者:

isLast 在接口中 ResultsetRows

返回:

true if on last row

next

public Row next()

指定者:

next 在接口中 Iterator<T extends ProtocolEntity>

getPosition

public int getPosition()

从接口复制的说明: RowList

Returns the current position.

指定者:

getPosition 在接口中 RowList

返回:

the current row number

afterLast

public void afterLast()

从接口复制的说明: ResultsetRows

Moves to after last.

指定者:

afterLast 在接口中 ResultsetRows

beforeFirst

public void beforeFirst()

从接口复制的说明: ResultsetRows

Moves to before first.

指定者:

beforeFirst 在接口中 ResultsetRows

beforeLast

public void beforeLast()

从接口复制的说明: ResultsetRows

Moves to before last.

指定者:

beforeLast 在接口中 ResultsetRows

moveRowRelative

public void moveRowRelative(int rows)

从接口复制的说明: ResultsetRows

Moves the current position relative 'rows' from the current position.

指定者:

moveRowRelative 在接口中 ResultsetRows

参数:

rows - the relative number of rows to move

setCurrentRow

public void setCurrentRow(int rowNumber)

从接口复制的说明: ResultsetRows

Moves the current position in the result set to the given row number.

指定者:

setCurrentRow 在接口中 ResultsetRows

参数:

rowNumber - row to move to