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https://issues.apache.org/jira/browse/DAFFODIL-1905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Beckerle updated DAFFODIL-1905:
------------------------------------
Priority: Minor (was: Major)
> fn:error all args assumed to be string, but 3rd arg isn't supposed to have to
> be a string.
> ------------------------------------------------------------------------------------------
>
> Key: DAFFODIL-1905
> URL: https://issues.apache.org/jira/browse/DAFFODIL-1905
> Project: Daffodil
> Issue Type: Bug
> Components: Middle "End"
> Affects Versions: 2.1.0
> Reporter: Mike Beckerle
> Priority: Minor
>
> Found when removing deprecated daf:error() from gif schema, and adding in an
> initial test.
> If you have an element of complex type like:
> {code}
> <xs:element name="Header">
> <xs:complexType>
> <xs:sequence>
> <xs:sequence
> dfdl:hiddenGroupRef="hidden_GIF_Signature_Group" />
> <xs:element name='Signature' type='xs:string'
> dfdl:inputValueCalc='{
> if (xs:string(../Hidden_Signature) eq
> "474946") then "GIF"
> else fn:error("gif", "fn:error
> called.", .) <!-- LOOK HERE -->
> }' />
> ...
> {code}
> The fn:error function call won't compile because of its 3 arguments, the
> third argument which is a "." meaning "this element", errors with
> {code}
> Caused by: Schema Definition Error: The type Complex cannot be converted to
> String.
> Schema context: element reference {}Global_Color_Table Location line 50
> column 18 in
> file:/home/mbeckerle-unencrypted/DFDLSchemas/gif/bin/com/mitre/gif/xsd/gif.dfdl.xsd
> {code}
> The daffodil implementation of fn:error says all 3 arguments are type String.
> This third argument is type Any. It's documented to be "the object causing
> the error" in XPath.
> A fix will loosen this restriction, allowing that 3rd argument to be
> anything. Of course it then has to accept and do something with anything
> there.
> In particular, if a complex type element is passed there, it has to do
> something meaningful.
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