com.mysql.cj.protocol.a.result

Class ResultsetRowsStreaming<T extends ProtocolEntity>

java.lang.Object

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

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

Type Parameters:

T - ProtocolEntity type

All Implemented Interfaces:

ProtocolEntity, ResultsetRows, RowList, java.util.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).

Field Summary

Fields inherited from class com.mysql.cj.protocol.a.result.AbstractResultsetRows

BEFORE_START_OF_ROWS, currentPositionInFetchedRows, metadata, owner, rowFactory, wasEmpty

Fields inherited from interface com.mysql.cj.result.RowList

RESULT_SET_SIZE_UNKNOWN

Constructor Summary

Constructors

Constructor and Description
ResultsetRowsStreaming(NativeProtocol io, ColumnDefinition columnDefinition, boolean isBinaryEncoded, ProtocolEntityFactory<T,NativePacketPayload> resultSetFactory) Creates a new RowDataDynamic object.

Method Summary

Modifier and Type	Method and Description
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.

Methods inherited from class com.mysql.cj.protocol.a.result.AbstractResultsetRows

getMetadata, getOwner, setMetadata, setOwner, wasEmpty

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.mysql.cj.protocol.ResultsetRows

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

Methods inherited from interface com.mysql.cj.result.RowList

get, previous, size

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

ResultsetRowsStreaming

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

Creates a new RowDataDynamic object.

Parameters:

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

Method Detail

close

public void close()

Description copied from interface: ResultsetRows

We're done.

Specified by:

close in interface ResultsetRows

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<Row>

isAfterLast

public boolean isAfterLast()

Description copied from interface: ResultsetRows

Returns true if we got the last element.

Specified by:

isAfterLast in interface ResultsetRows

Returns:

true if after last row

isBeforeFirst

public boolean isBeforeFirst()

Description copied from interface: ResultsetRows

Returns if iteration has not occured yet.

Specified by:

isBeforeFirst in interface ResultsetRows

Returns:

true if before first row

isEmpty

public boolean isEmpty()

Description copied from interface: ResultsetRows

Has no records.

Specified by:

isEmpty in interface ResultsetRows

Returns:

true if no records

isFirst

public boolean isFirst()

Description copied from interface: ResultsetRows

Are we on the first row of the result set?

Specified by:

isFirst in interface ResultsetRows

Returns:

true if on first row

isLast

public boolean isLast()

Description copied from interface: ResultsetRows

Are we on the last row of the result set?

Specified by:

isLast in interface ResultsetRows

Returns:

true if on last row

next

public Row next()

Specified by:

next in interface java.util.Iterator<Row>

getPosition

public int getPosition()

Description copied from interface: RowList

Returns the current position.

Specified by:

getPosition in interface RowList

Returns:

the current row number

afterLast

public void afterLast()

Description copied from interface: ResultsetRows

Moves to after last.

Specified by:

afterLast in interface ResultsetRows

beforeFirst

public void beforeFirst()

Description copied from interface: ResultsetRows

Moves to before first.

Specified by:

beforeFirst in interface ResultsetRows

beforeLast

public void beforeLast()

Description copied from interface: ResultsetRows

Moves to before last.

Specified by:

beforeLast in interface ResultsetRows

moveRowRelative

public void moveRowRelative(int rows)

Description copied from interface: ResultsetRows

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

Specified by:

moveRowRelative in interface ResultsetRows

Parameters:

rows - the relative number of rows to move

setCurrentRow

public void setCurrentRow(int rowNumber)

Description copied from interface: ResultsetRows

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

Specified by:

setCurrentRow in interface ResultsetRows

Parameters:

rowNumber - row to move to