tuxji commented on a change in pull request #373:
URL: https://github.com/apache/incubator-daffodil/pull/373#discussion_r416794287
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File path:
daffodil-runtime1/src/main/scala/org/apache/daffodil/dpath/FNFunctions.scala
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@@ -706,6 +706,92 @@ case class FNLocalName1(recipe: CompiledDPath, argType:
NodeInfo.Kind)
}
}
+/**
+ * Returns the namespace URI of the name of \$arg as an xs:anyURI
+ * value.
+ *
+ * If the argument is omitted, it defaults to the context item (.).
+ * The behavior of the function if the argument is omitted is
+ * exactly the same as if the context item had been passed as
+ * the argument.
+ *
+ * If the node identified by \$arg is neither an element nor an
+ * attribute node, or it is an element or attribute node whose
+ * expanded-QName is in no namespace, then the function returns
+ * the zero-length xs:anyURI value.
+ *
+ * Otherwise, the result will be the namespace URI of the
+ * expanded-QName of the node identified by \$arg returned as an
+ * xs:anyURI value.
+ *
+ * The following errors may be raised when \$arg is omitted:
+ * - If the context item is absent, dynamic error [err:XPDY002]
+ * - If the context item is not a node, type error [err:XPTY004]
+ *
+ * This function is called when 0 arguments are provided. We
+ * treat this as if the argument passed was "." to denote self.
+ */
+case class FNNamespaceUri0(recipe: CompiledDPath, argType: NodeInfo.Kind)
+ extends RecipeOpWithSubRecipes(recipe) {
+ override def run(dstate: DState) {
+ // Hook so we can insist this is non-constant at compile time
+ dstate.fnExists()
+ // Check that we have a current node, otherwise return empty string(URI)
+ if (dstate.currentNode eq null) {
+ dstate.setCurrentValue("")
+ }
+ else {
+ // Same as using "." to denote self.
+ val value: DataValueURI =
dstate.currentNode.namedQName.namespace.optURI.get
+ dstate.setCurrentValue(value)
+ }
+ }
+}
+
+/**
+ * Returns the namespace URI of the name of \$arg as an xs:anyURI
+ * value.
+ *
+ * If the node identified by \$arg is neither an element nor an
+ * attribute node, or it is an element or attribute node whose
+ * expanded-QName is in no namespace, then the function returns
+ * the zero-length xs:anyURI value.
+ *
+ * Otherwise, the result will be the namespace URI of the
+ * expanded-QName of the node identified by \$arg returned as an
+ * xs:anyURI value.
+ */
+case class FNNamespaceUri1(recipe: CompiledDPath, argType: NodeInfo.Kind)
+ extends FNOneArg(recipe, argType) {
+ override def computeValue(value: DataValuePrimitive, dstate: DState) = {
+ Assert.usageError("not to be called. DPath compiler should be answering
this without runtime calls.")
+ }
+
+ override def run(dstate: DState) {
+ // Hook so we can insist this is non-constant at compile time
+ dstate.fnExists()
+ // Save off original state, which is the original
+ // element/node that calls inputValueCalc with fn:namespace-uri.
Review comment:
Good to know, thanks! I'll make a similar change to FNLocalName.
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