net.sf.jasperreports.engine.fill
Class BaseFillHandle

java.lang.Object
  net.sf.jasperreports.engine.fill.BaseFillHandle

All Implemented Interfaces:

FillHandle

Direct Known Subclasses:

AsynchronousFillHandle

public abstract class BaseFillHandle
extends Object
implements FillHandle

Base class used to perform report filling asychronously.

An instance of this type can be used as a handle to an asychronous fill process. The main benefit of this method is that the filling process can be cancelled.

Version:

$Id: BaseFillHandle.java 5050 2012-03-12 10:11:26Z teodord $

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Nested Class Summary

protected class

BaseFillHandle.ReportFiller

Field Summary

protected boolean	cancelled
protected Connection	conn
protected JRDataSource	dataSource
protected JRBaseFiller	filler
protected JasperReport	jasperReport
protected JasperReportsContext	jasperReportsContext
protected List<AsynchronousFilllListener>	listeners
protected Object	lock
protected Map<String,Object>	parameters
protected boolean	running
protected boolean	started

Constructor Summary

protected

BaseFillHandle(JasperReportsContext jasperReportsContext, JasperReport jasperReport, Map<String,Object> parameters, JRDataSource dataSource, Connection conn)

Method Summary

void	addFillListener(FillListener listener) Adds a fill listener to the filling process.
void	addListener(AsynchronousFilllListener listener) Adds a listener to the filling process.
void	cancellFill() Cancels the fill started by the handle.
protected abstract Executor	getReportExecutor()
boolean	isPageFinal(int pageIdx) Determines wheter a page generated by the fill process is final or not.
protected void	notifyCancel()
protected void	notifyError(Throwable e)
protected void	notifyFinish(JasperPrint print)
boolean	removeListener(AsynchronousFilllListener listener) Removes a listener from the filling process.
void	startFill() Starts the filling process asychronously.

Methods inherited from class java.lang.Object

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

Field Detail

jasperReportsContext

protected final JasperReportsContext jasperReportsContext

jasperReport

protected final JasperReport jasperReport

parameters

protected final Map<String,Object> parameters

dataSource

protected final JRDataSource dataSource

conn

protected final Connection conn

filler

protected final JRBaseFiller filler

listeners

protected final List<AsynchronousFilllListener> listeners

started

protected boolean started

running

protected boolean running

cancelled

protected boolean cancelled

lock

protected final Object lock

Constructor Detail

BaseFillHandle

protected BaseFillHandle(JasperReportsContext jasperReportsContext,
                         JasperReport jasperReport,
                         Map<String,Object> parameters,
                         JRDataSource dataSource,
                         Connection conn)
                  throws JRException

Throws:

JRException

Method Detail

addListener

public void addListener(AsynchronousFilllListener listener)

Description copied from interface: FillHandle

Adds a listener to the filling process.

Specified by:

addListener in interface FillHandle

Parameters:

listener - the listener to be added

addFillListener

public void addFillListener(FillListener listener)

Description copied from interface: FillHandle

Adds a fill listener to the filling process. The fill listener is notified of intermediate events that occur during the report generation.

Specified by:

addFillListener in interface FillHandle

Parameters:

listener - the listener to add

removeListener

public boolean removeListener(AsynchronousFilllListener listener)

Description copied from interface: FillHandle

Removes a listener from the filling process.

Specified by:

removeListener in interface FillHandle

Parameters:

listener - the listener to be removed

Returns:

true if the listener was found and removed

startFill

public void startFill()

Description copied from interface: FillHandle

Starts the filling process asychronously.

The filling can be launched on a new thread and the method exits after the execution is started.

When the filling finishes either in success or failure, the listeners are notified.

Specified by:

startFill in interface FillHandle

getReportExecutor

protected abstract Executor getReportExecutor()

cancellFill

public void cancellFill()
                 throws JRException

Description copied from interface: FillHandle

Cancels the fill started by the handle.

The method sends a cancel signal to the filling process. When the filling process will end, the listeners will be notified that the filling has been cancelled.

Specified by:

cancellFill in interface FillHandle

Throws:

JRException

notifyFinish

protected void notifyFinish(JasperPrint print)

notifyCancel

protected void notifyCancel()

notifyError

protected void notifyError(Throwable e)

isPageFinal

public boolean isPageFinal(int pageIdx)

Description copied from interface: FillHandle

Determines wheter a page generated by the fill process is final or not.

Specified by:

isPageFinal in interface FillHandle

Parameters:

pageIdx - the page index

Returns:

whether the page at the specified index is final or can be subject to future changes

See Also:

FillListener.pageUpdated(JasperPrint, int)