You are not limited to static pre-compiled XML based reports with Jasper. There is also an API to generate reports on the fly. Look at Jasper's NoXmlDesignApp sample.
Phil
Keith Rogers wrote:
It did not look easy to produce the following report,
The report details which units in a course a student has passed. The rows are students, the columns are units (and one for the student id). The problem here is that the unit columns are retreived from the course, so it will not be known at runtime how many there are or what their names are. I undestand that it is possible to programmatically adjust the report definition, but this would then require me to use two XML docs for each report - the JasperReport xml and another to define how this should be modified at runtime.
My impression (which I hope is wrong) is still that JasperReports is mainly a report presentation tool, and that producing tabular reports like the one above that has variable fields produced by a query at "filling" time would be difficult to do using it.
Keith
[EMAIL PROTECTED] 28/04/2004 12:53:20 >>>
Keith,
We ve been using JasperReports with OJB por a while now. Reading your
requirements, it seems JasperReports deservs a deep look. Let me quote you
I'd like to be able to write a definition of the report in XML
Well, this is exactly what you do with JR. Jasper will parser the
report definition for you, will "compile" the report and will it have it ready
to be "filled" which means "run" in JR jargon on demand.
From JasperReports tutorial a simple report definition (http://jasperreports.sourceforge.net/tutorial/):
<?xml version="1.0"?>
<!DOCTYPE jasperReport PUBLIC "-//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd";>
<jasperReport name="name_of_the_report" ... > ... </jasperReport>
If you like to try a visual designer for JR try ireports at http://ireport.sourceforge.net/
JasperReports will work with any jdbc datasource and with OJB you will
be able to pass him a collection of objects.
BTW, we are no related to JR in any form.
Regards, Gustavo.
"Keith Rogers" <[EMAIL PROTECTED]> wrote on 28/04/2004 08:18:08 a.m.:
Thanks to all who replied to this!
All of these seem to be report presentation libraries rather than report generators, so I think I might try to write something more specific to my needs.
Keith
[EMAIL PROTECTED] 26/04/2004 14:30:28 >>>
A quick search of sourceforge finds:
OpenReports : http://sourceforge.net/projects/oreports/ JasperReports : http://sourceforge.net/projects/jasperreports/ JFreeReport : http://sourceforge.net/projects/jfreereport/
I think all 3 of these tools use an xml based syntax. I have played
around w/ then a little, but not enough to offer any advice. I don't
think any integrate directly w/ OJB, but you could probably write a wrapper for the OJB Report Query class for use with the tools. Good
luck.
Keith Rogers wrote:
I've gotten around to the part of my application that needs to
produce
reports on various things. Rather than hard-code reports, which
would,
admittedly make my job more secure :-) , I'd like to be able to
write
a
definition of the report in XML, and have some parser take this and produce the report automatically on demand. I realise that this is not going to be a trivial task, so my first question is - Has anyone done anything similar for OJB?
Assuming the answer is "No", I suppose I'll have to try it
myself...
Does anyone know of a similar report-from-xml-definition that I
might
draw ideas from?
Keith
--
Robert r. Sanders
Chief Technologist
iPOV
www.ipov.net
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