Package 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.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	BaseFillHandle.ReportFill

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	cancelled
protected final Connection	conn
protected final JRDataSource	dataSource
protected final ReportFiller	filler
protected final JasperReport	jasperReport
protected final JasperReportsContext	jasperReportsContext
protected final List<AsynchronousFilllListener>	listeners
protected final Object	lock
protected final Map<String,Object>	parameters
protected boolean	running
protected boolean	started

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	BaseFillHandle(JasperReportsContext jasperReportsContext, JasperReportSource reportSource, Map<String,Object> parameters, JRDataSource dataSource, Connection conn)
protected	BaseFillHandle(JasperReportsContext jasperReportsContext, JasperReport jasperReport, Map<String,Object> parameters, JRDataSource dataSource, Connection conn)

Method Summary

Modifier and Type	Method	Description
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 Details

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 ReportFiller 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 Details

BaseFillHandle

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

Throws:

JRException

BaseFillHandle

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

Throws:

JRException

Method Details

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)