org.jfree.report

Interface ReportDataFactory

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(String query, DataSet parameters)
Queries a datasource.

Method Details

close

public void close()
Closes the report data factory and all report data instances that have been returned by this instance.

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.
Returns:

open

public void open()

queryData

public ReportData queryData(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: