Package org.jfree.report
Interface ReportDataFactory
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- 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
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method 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.
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Method Detail
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open
void open()
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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
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close
void close()
Closes the report data factory and all report data instances that have been returned by this instance.
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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:
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