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https://issues.apache.org/jira/browse/VELOCITY-749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Osipov closed VELOCITY-749.
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> ReferenceInsertionEventHandler called "to often"/need more configuration
> settings
> ---------------------------------------------------------------------------------
>
> Key: VELOCITY-749
> URL: https://issues.apache.org/jira/browse/VELOCITY-749
> Project: Velocity
> Issue Type: Bug
> Affects Versions: 1.6.2
> Reporter: Marco Rothe
> Priority: Minor
>
> I use the EscapeXmlReference (ReferenceInsertionEventHandler implementation)
> in our projects to produce valid XHTML.
> But I works not as expected in some situations:
> Given the reference $test as 'Me & Co. Ltd' (for example from context) will
> output as
> Me & Co. Ltd
> correctly after the EscapeXmlReference.
> But if we enrich the $test reference with some other string before output
> (#set($test = "* $test *")) we got
> * Me & Co. Ltd *
> and not * Me & Co. Ltd * as output!
> This is because the EscapeReference handler was called two times. First on
> the (internal) set directive (Me & Co. Ltd -> Me & Co. Ltd), second on
> the real output of $test to the stream (* Me & Co. Ltd *-> * Me
> & Co. Ltd *).
> The javadoc of ReferenceInsertionEventHandler says "Reference 'Stream
> insertion' event handler. Called with object that will be inserted into
> stream via value.toString()."
> "inserted into stream" means to me into the real output stream of the
> template merge, not into internal substreams. So I believe it's a bug or a
> least an unexpected behaviour because it produce unpredictable results on
> string operations.
> So the ReferenceInsertionEventHandler needs the possibility to know if the
> current insertation is an internal or an real output insertation to be able
> to react on situations as descripted above.
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