Package org.hibernate.internal

Class EmptyScrollableResults

java.lang.Object

org.hibernate.internal.EmptyScrollableResults

All Implemented Interfaces:

Closeable, AutoCloseable, ScrollableResultsImplementor, ScrollableResults

public class EmptyScrollableResults
extends Object
implements ScrollableResultsImplementor

Field Summary

Fields

Modifier and Type	Field	Description
static ScrollableResultsImplementor	INSTANCE

Constructor Summary

Constructors

Constructor	Description
EmptyScrollableResults()

Method Summary

Modifier and Type	Method	Description
void	afterLast()	Go to a location just after the last result.
void	beforeFirst()	Go to a location just before first result.
void	close()	Release resources immediately.
boolean	first()	Go to the first result.
Object[]	get()	Get the current row of results.
int	getRowNumber()	Get the current position in the results.
boolean	isClosed()
boolean	isFirst()	Is this the first result?
boolean	isLast()	Is this the last result?
boolean	last()	Go to the last result.
boolean	next()	Advance to the next result.
boolean	position(int position)	Moves the result cursor to the specified position.
boolean	previous()	Retreat to the previous result.
boolean	scroll(int positions)	Scroll the specified number of positions from the current position.
void	setFetchSize(int fetchSize)	Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed.
boolean	setRowNumber(int rowNumber)	Set the current position in the result set.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final ScrollableResultsImplementor INSTANCE

Constructor Detail

EmptyScrollableResults

public EmptyScrollableResults()

Method Detail

isClosed

public boolean isClosed()

Specified by:

isClosed in interface ScrollableResultsImplementor

close

public void close()

Description copied from interface: ScrollableResults

Release resources immediately.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface ScrollableResults

next

public boolean next()

Description copied from interface: ScrollableResults

Advance to the next result.

Specified by:

next in interface ScrollableResults

Returns:

true if there is another result

previous

public boolean previous()

Description copied from interface: ScrollableResults

Retreat to the previous result.

Specified by:

previous in interface ScrollableResults

Returns:

true if there is a previous result

scroll

public boolean scroll(int positions)

Description copied from interface: ScrollableResults

Scroll the specified number of positions from the current position.

Specified by:

scroll in interface ScrollableResults

Parameters:

positions - a positive (forward) or negative (backward) number of rows

Returns:

true if there is a result at the new location

position

public boolean position(int position)

Description copied from interface: ScrollableResults

Moves the result cursor to the specified position.

Specified by:

position in interface ScrollableResults

Returns:

true if there is a result at the new location

last

public boolean last()

Description copied from interface: ScrollableResults

Go to the last result.

Specified by:

last in interface ScrollableResults

Returns:

true if there are any results

first

public boolean first()

Description copied from interface: ScrollableResults

Go to the first result.

Specified by:

first in interface ScrollableResults

Returns:

true if there are any results

beforeFirst

public void beforeFirst()

Description copied from interface: ScrollableResults

Go to a location just before first result.

This is the location of the cursor on a newly returned scrollable result.

Specified by:

beforeFirst in interface ScrollableResults

afterLast

public void afterLast()

Description copied from interface: ScrollableResults

Go to a location just after the last result.

Specified by:

afterLast in interface ScrollableResults

isFirst

public boolean isFirst()

Description copied from interface: ScrollableResults

Is this the first result?

Specified by:

isFirst in interface ScrollableResults

Returns:

true if this is the first row of results, otherwise false

isLast

public boolean isLast()

Description copied from interface: ScrollableResults

Is this the last result?

Specified by:

isLast in interface ScrollableResults

Returns:

true if this is the last row of results.

getRowNumber

public int getRowNumber()

Description copied from interface: ScrollableResults

Get the current position in the results.

The first position is number 0 (unlike JDBC).

Specified by:

getRowNumber in interface ScrollableResults

Returns:

The current position number, numbered from 0; -1 indicates that there is no current row

setRowNumber

public boolean setRowNumber(int rowNumber)

Description copied from interface: ScrollableResults

Set the current position in the result set.

Can be numbered from the first result (positive number) or backward from the last result (negative number).

Specified by:

setRowNumber in interface ScrollableResults

Parameters:

rowNumber - the row number. A positive number indicates a value numbered from the first row; a negative number indicates a value numbered from the last row.

Returns:

true if there is a row at that row number

setFetchSize

public void setFetchSize(int fetchSize)

Description copied from interface: ScrollableResults

Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed. If 0, the JDBC driver's default setting will be used.

Specified by:

setFetchSize in interface ScrollableResults

See Also:

ResultSet.setFetchSize(int), JdbcSettings.STATEMENT_FETCH_SIZE

get

public Object[] get()

Description copied from interface: ScrollableResults

Get the current row of results.

Specified by:

get in interface ScrollableResults

Returns:

The array of results