[#XRP-16] NVL Function - Cocoondev.org Issue Tracker

Issue Details [XML]

Key:	XRP-16
Type:	New Feature
Status:	Closed
Resolution:	Applied
Priority:	Minor
Reporter:	Bill Bruyn
Votes:	0
Watchers:	0

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NVL Function

Created: 06/Jul/04 09:37 PM Updated: 29/Apr/05 03:43 PM

Component/s:

xReporter

Affects Version/s:

None

Fix Version/s:

1.2.1

File Attachments:

nvl.patch (15 kb)

Description

A function for substitution of values that cannot be evaluated. For instance, referring to a variable that was created in an earler step but assigned no value causes an ExpressionException to be thrown when the expression is evaluated. The following illustates typical usage:

<flow>
  <step id="getParameters">
    <interaction>
      <parameter id="request_id" required="false">
        <prompt>Please Enter Request ID</prompt>
        <title>Request ID</title>
        <type base="string" />
      </parameter>
    </interaction>
  </step>
</flow>
<output>
<http host="deathstar.mcao.maricopa.gov" port="80" path="/xprototype/tasks">
   <parameter name='request_id' expression='NVL(request_id, "")'/>
</http>
</output>

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Change History

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Comment by mpo@outerthought.org [13/Aug/04 05:24 PM]

[ Permlink ]

This was checked into the 1.2.1 branch
http://cvs.cocoondev.org/cgi-bin/viewcvs.cgi/xreporter/status.xml.diff?r1=1.57&r2=1.58&cvsroot=xreporter

small differences compared to the patch:
- NVL is made to catch all exceptions (so not only ExpressionExceptions but also possible RuntimeExceptions that might be hidden)
- slightly higher effiency by not evaluating 2nd argument if not needed, and by not catching an rethrowing

also added:
- extra lines in documentation
- tests in ExpressionTest.java

Comment by Marc Portier [09/Nov/04 06:08 AM]

[ Permlink ]

Administrative close (patch happened some time ago)