org.jfree.report.data

Class CachingReportDataFactory

java.lang.Object

org.jfree.report.data.CachingReportDataFactory

All Implemented Interfaces:

ReportDataFactory

public class CachingReportDataFactory
extends java.lang.Object
implements ReportDataFactory

Creation-Date: 19.11.2006, 13:35:45

Author:

Thomas Morgner

Constructor Summary

Constructors

Constructor and Description
CachingReportDataFactory(ReportDataFactory backend)

Method Summary

Modifier and Type	Method and Description
void	close() Closes the report data factory and all report data instances that have been returned by this instance.
ReportDataFactory	derive() Derives a freshly initialized report data factory, which is independend of the original data factory.
void	open()
ReportData	queryData(java.lang.String query, DataSet parameters) Queries a datasource.

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingReportDataFactory

public CachingReportDataFactory(ReportDataFactory backend)

Method Detail

open

public void open()

Specified by:

open in interface ReportDataFactory

queryData

public ReportData queryData(java.lang.String query,
                            DataSet parameters)
                     throws ReportDataFactoryException

Queries a datasource. The string 'query' defines the name of the query. The Parameterset given here may contain more data than actually needed.

The dataset may change between two calls, do not assume anything!

Specified by:

queryData in interface ReportDataFactory

Parameters:

query -

parameters -

Returns:

Throws:

ReportDataFactoryException

close

public void close()

Closes the report data factory and all report data instances that have been returned by this instance.

Specified by:

close in interface ReportDataFactory

derive

public ReportDataFactory derive()

Derives a freshly initialized report data factory, which is independend of the original data factory. Opening or Closing one data factory must not affect the other factories.

Specified by:

derive in interface ReportDataFactory

Returns: