| org.jfree.report.function.Function
All known Subclasses: org.jfree.report.function.AbstractFunction, org.jfree.report.function.sys.SingleValueQueryFunction,
| Function | | public interface Function extends ReportListener,Expression(Code) | | The interface for report functions. A report function separates the business logic
from presentation of the result. The function is called whenever JFreeReport changes
its state while generating the report. The working model for the functions is based on
cloning the state of the function on certain checkpoints to support the ReportState
implementation of JFreeReport.
Although functions support the ReportListener interface, they are not directly added to
a report. A report FunctionCollection is used to control the functions. Functions are
required to be cloneable.
author:
Thomas Morgner |
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