stevedlawrence commented on a change in pull request #273: WIP: Add User
Defined Functions Capability
URL: https://github.com/apache/incubator-daffodil/pull/273#discussion_r334903004
##########
File path:
daffodil-core/src/main/scala/org/apache/daffodil/dpath/Expression.scala
##########
@@ -1870,7 +1870,32 @@ case class FunctionCallExpression(functionQNameString:
String, expressions: List
case (RefQName(_, "unsignedByte", XSD), args) =>
XSConverterExpr(functionQNameString, functionQName, args,
NodeInfo.UnsignedByte)
- case _ => SDE("Unsupported function: %s", functionQName)
+ case (_: RefQName, args) => {
+ val namespace = functionQName.namespace.toString()
+ val fName = functionQName.local
+
+ val udfCallingInfo =
UserDefinedFunctionService.lookupUDFCallingInfo(namespace, fName)
+
+ if (udfCallingInfo.isEmpty) {
+ SDE(s"Error calling $namespace:$fName")
Review comment:
This error message could probably be improved, since it doesn't say what the
error is. That makes it hard for the user to figure out how to solve the
problem.
Does it make sense to use the same error message we had when a function was
not supported? I.e.
```scala
SDE("Unsupported function: %s", functionQName)
```
It's also better to use functionQName instead of namespace + fName. The
toString method on RefQName knows about prefixes and things and will make a
more human readable qname.
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