net.sf.basedb.core
Class DataResultIterator<I extends BasicData>

java.lang.Object
  net.sf.basedb.core.DataResultIterator<I>

All Implemented Interfaces:

Iterator<I>, QueryResult, ResultIterator<I>

public class DataResultIterator<I extends BasicData>
extends Object
implements ResultIterator<I>

Return the results of a DataQuery as an iterator. This type of iterator is only used for batchable items like reporter and raw data. It is expected that the query uses the stateless Hibernate session available from DbControl.getStatelessSession(). If not, the returned objects are automatically disconnected from the Hibernate session to avoid memory problems and bypassing permission checks.

Version:

2.0

Author:

Samuel, Nicklas

See Also:

DataQuery.iterate(DbControl)

Last modified

$Date: 2009-04-06 14:52:39 +0200 (Mon, 06 Apr 2009) $

Field Summary

private ScrollIterator<I>	data The internal iterator of BasicData objects.
private Class<I>	dataClass The class of the data objects returned by the query (and this object).
private Item	itemType The type of items returned by the query.
private SessionControl	sc The SessionControl
private Session	session The Hibernate Session that was used in the query, null if a stateless session is used.
private long	totalCount The total number of items.

Constructor Summary

DataResultIterator(ScrollIterator<I> data, SessionControl sc, Session session, Class<I> dataClass, long totalCount)

Method Summary

void	close() From the ResultIterator interface ---------------------------------
Item	getItemType() Get the type of items contained in this list.
long	getTotalCount() From the QueryResult interface ---------------------------------
boolean	hasNext()
boolean	isClosed() Check if the iterator has been closed.
I	next()
void	remove() Not supported.

Methods inherited from class java.lang.Object

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

Field Detail

data

private final ScrollIterator<I extends BasicData> data

The internal iterator of BasicData objects.

session

private final Session session

The Hibernate Session that was used in the query, null if a stateless session is used.

sc

private final SessionControl sc

The SessionControl

totalCount

private final long totalCount

The total number of items.

dataClass

private final Class<I extends BasicData> dataClass

The class of the data objects returned by the query (and this object).

itemType

private final Item itemType

The type of items returned by the query.

Constructor Detail

DataResultIterator

DataResultIterator(ScrollIterator<I> data,
                   SessionControl sc,
                   Session session,
                   Class<I> dataClass,
                   long totalCount)

Method Detail

getTotalCount

public long getTotalCount()

From the QueryResult interface ---------------------------------

Specified by:

getTotalCount in interface QueryResult

Returns:

The total number of items, or -1 if not known

See Also:

Query.setReturnTotalCount(boolean)

close

public void close()

From the ResultIterator interface ---------------------------------

Specified by:

close in interface ResultIterator<I extends BasicData>

isClosed

public boolean isClosed()

Description copied from interface: ResultIterator

Check if the iterator has been closed.

Specified by:

isClosed in interface ResultIterator<I extends BasicData>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<I extends BasicData>

next

public I next()

Specified by:

next in interface Iterator<I extends BasicData>

remove

public void remove()

Not supported.

Specified by:

remove in interface Iterator<I extends BasicData>

Throws:

UnsupportedOperationException - Always

getItemType

public Item getItemType()

Get the type of items contained in this list.

Returns:

An Item object or null if not known