org.jfree.report
Interface ReportDataFactory

All Known Implementing Classes:

CachingReportDataFactory, EmptyReportDataFactory, NamedStaticReportDataFactory, SimpleSQLReportDataFactory, SQLReportDataFactory, StaticReportDataFactory, TableReportDataFactory

public interface ReportDataFactory

The report data-factory is responsible for querying the data from arbitary datasources.

Author:

Thomas Morgner

Method Summary

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.

Method Detail

open

void open()

queryData

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!

Parameters:

query -

parameters -

Returns:

Throws:

ReportDataFactoryException

close

void close()

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

derive

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.

Returns: