atomatically compile subreports

dusca wrote:

But in the case of a report having subreports, how do I find that mainReport subreports (and what are their filenames) to compile those also? there is no JasperReport.getSubeports() or something similar... any ideas?

If you use JR 2.0.3 or newer, you can iterate on all the subreports in a report via [url=http://jasperreports.sourceforge.net/api/net/sf/jasperreports/engine/uti...

Code:

<br /> JRElementsVisitor.visitReport(jr, new JRVisitorSupport() {<br /> @Override<br /> public void visitSubreport(JRSubreport subreport) {<br /> ..do whatever you have to do with the subreport..<br /> }<br /> });<br /> </td></tr></tbody></table><br /> <br /> Note that if you want to determine the "filename" of the subreport, you'll have to make some assumptions on the subreport expressions, since such expressions can be arbitrarily complex and don't necessarily consists of a static filename.<br /> <br /> HTH,<br /> Lucian

to answer my own question, loadObject has no effect.

so it's not that

later edit:

this is killing me now!

I have a report that has one subreport. the subreport expression is something like "SubraportulMeu.jasper"

that works perfectly with the code explained above.

then another report, but with two subreports, with the same expression - gives me the "cannot load" exception.

i quadruple checked but just can't figure out what the heck is the difference, why one works but the other doesn't. to the first i only send $P{} params, to the second i send $P{} and $F{}. that is the only thing that is different, but shouldn't be relevant.
Post edited by: dusca, at: 2008/05/14 15:19

lucian, then how is it explained that one of the reports works without a full abstract path? the same directories are used in both cases . all jrxml files are in one directory and all jasper files in another.

i found out why the particular one was created. eclipse forgot to delete the jasper file from the bin directory, so it was in the run dir.


so ..
in the end i used greylimbo's solution after all.

thank you, it is quite a trick.

i cannot imagine another way, to use a relative path to the subreport
Post edited by: dusca, at: 2008/05/14 20:06

You need to have Subreport.jrxml present as a resource on the application classpath, e.g. placed in a folder which is included on the classpath.

Regards,

Lucian

Isn't it a bit kind of inperformance to (re)compile the jrxml everytime the SubReport is loaded?

Imagine you have a placed the SubReport-Element in detail of MasterReport and have 1000 records... with your SubReportExpression you will now have 1000 compiles, isn't it????

So I would pass the compiled JasperReport Object as parameter or use a scriptlet does check wheter the jrxml must be (re)compiled or not!??!?! So as the SubReport-design isn't changed normally while fill process it should be compiled just once and not at each call!??!?!?!??

 

just my two cents.

C-Box

I all

i have tryed the solution using the following line:

<subreportExpression class="net.sf.jasperreports.engine.JasperReport"><![CDATA[net.sf.jasperreports.engine.JasperCompileManager.compileReport(getClass().getResource("/prova/sub_dummy.jrxml").openStream())]]></subreportExpression>

on my main.jrxml report file

works great from my webapp (jsp), but if i open the file with IREPORT (v 3.5.2) and use "preview" button,  that gives me the following error:

Error filling print... Error evaluating expression :      Source text : net.sf.jasperreports.engine.JasperCompileManager.compileReport(getClass().getResource("/prova/sub_dummy.jrxml").openStream())
net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression :      Source text : net.sf.jasperreports.engine.JasperCompileManager.compileReport(getClass().getResource("/prova/sub_dummy.jrxml").openStream())      at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:197)      at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:574)      at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:542)      at net.sf.jasperreports.engine.fill.JRFillElement.evaluateExpression(JRFillElement.java:872)      at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateSubreport(JRFillSubreport.java:283)      at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubreport.java:270)      at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:260)      at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:486)      at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillTitle(JRVerticalFiller.java:312)      at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:248)      at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:114)      at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:911)      at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:814)      at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:63)      at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:421)      at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:251)      at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:898)      at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)      at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)  Caused by: net.sf.jasperreports.engine.JRException: Could not instantiate report compiler : it.businesslogic.ireport.compiler.ExtendedJRJdtCompiler      at net.sf.jasperreports.engine.JasperCompileManager.getCompiler(JasperCompileManager.java:520)      at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:219)      at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:205)      at main_1245143465937_710977.evaluate(main_1245143465937_710977:183)      at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:186)      ... 18 more  Caused by: java.lang.ClassNotFoundException: it.businesslogic.ireport.compiler.ExtendedJRJdtCompiler      at java.net.URLClassLoader$1.run(URLClassLoader.java:200)      at java.security.AccessController.doPrivileged(Native Method)      at java.net.URLClassLoader.findClass(URLClassLoader.java:188)      at java.lang.ClassLoader.loadClass(ClassLoader.java:307)      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)      at java.lang.ClassLoader.loadClass(ClassLoader.java:252)      at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:231)      at java.lang.ClassLoader.loadClass(ClassLoader.java:252)      at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)      at java.lang.Class.forName0(Native Method)      at java.lang.Class.forName(Class.java:247)      at net.sf.jasperreports.engine.util.JRClassLoader.loadClassForRealName(JRClassLoader.java:179)      at net.sf.jasperreports.engine.util.JRClassLoader.loadClassForName(JRClassLoader.java:119)      at net.sf.jasperreports.engine.JasperCompileManager.getCompiler(JasperCompileManager.java:515)      ... 22 more 
Print not filled. Try to use an EmptyDataSource...

anyone knows the problem and a solution to it?

maybe i have missing something like a particular jar in the classpath?

thanks,

Mat

 Hi friend,

I am also try this, but the sub report not displayed.