crosstab cell -> endless loop

[sravyts]

I have a crosstab with a cell with a very long text shown in a dynamic textfield.

But my rendering process seems to go into an infinite loop. When Ctrl-Break is pressed I see the stacktrace pasted at the bottom.

Can this infinite loop throw an exception like the (infinite loop due to column header overflow etc...) if it is due to a bad design, or is this a bug?

 

 

 

at java.text.RuleBasedBreakIterator.handlePrevious(RuleBasedBreakIterator.java:960)

at java.text.RuleBasedBreakIterator.previous(RuleBasedBreakIterator.java:626)

at java.text.RuleBasedBreakIterator.preceding(RuleBasedBreakIterator.java:774)

at java.awt.font.LineBreakMeasurer.nextOffset(LineBreakMeasurer.java:363)

at java.awt.font.LineBreakMeasurer.nextLayout(LineBreakMeasurer.java:422)

at java.awt.font.LineBreakMeasurer.nextLayout(LineBreakMeasurer.java:395)

at net.sf.jasperreports.engine.fill.TextMeasurer.renderParagraph(TextMeasurer.java:294)

at net.sf.jasperreports.engine.fill.TextMeasurer.measure(TextMeasurer.java:249)

at net.sf.jasperreports.engine.fill.JRFillTextElement.chopTextElement(JRFillTextElement.java:535)

at net.sf.jasperreports.engine.fill.JRFillTextField.prepare(JRFillTextField.java:529)

at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:343)

at net.sf.jasperreports.engine.fill.JRFillCellContents.prepare(JRFillCellContents.java:357)

at net.sf.jasperreports.engine.fill.JRFillCrosstab$CrosstabFiller.prepareDataCell(JRFillCrosstab.java:1515)

at net.sf.jasperreports.engine.fill.JRFillCrosstab$CrosstabFiller.prepareRow(JRFillCrosstab.java:1439)

at net.sf.jasperreports.engine.fill.JRFillCrosstab$CrosstabFiller.fillRows(JRFillCrosstab.java:1351)

at net.sf.jasperreports.engine.fill.JRFillCrosstab$CrosstabFiller.fillVerticalCrosstab(JRFillCrosstab.java:916)

at net.sf.jasperreports.engine.fill.JRFillCrosstab$CrosstabFiller.fill(JRFillCrosstab.java:863)

at net.sf.jasperreports.engine.fill.JRFillCrosstab.prepare(JRFillCrosstab.java:495)

at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:343)

[lucianc]

Crosstab cells do not split on multiple pages, so when one of the cells would not fit on a single page the engine will enter an infinite loop.

 

Detecting when the engine goes into an infinite loop is a very complex task, and the current infinity loop detection code only covers some scenarios that lead to this. If you think the engine should throw an exception in the scenario you described, log this as a bug and we'll investigate it.

 

Regards,

Lucian

[sravyts]

Is it an option to stretch cell contents over multiple pages or is this not possible?

[lucianc]

It's not (currently) an option.

 

Regards,

Lucian