olabusayoT commented on a change in pull request #273: WIP: Add User Defined
Functions Capability
URL: https://github.com/apache/incubator-daffodil/pull/273#discussion_r331644961
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File path:
daffodil-test/src/test/java/org/goodudfs/example/StringFunctions/StringFunctionsProvider.java
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@@ -0,0 +1,25 @@
+package org.goodudfs.example.StringFunctions;
+
+import org.apache.daffodil.udf.*;
+
+public class StringFunctionsProvider extends UDFunctionProvider {
+ public StringFunctionsProvider() {
+ super.setFunctionClasses( new Class<?>[] { Replace.class,
Compare.class } );
+ }
+
+ public Object lookupFunctionClass(String namespace, String name) {
+ Object functionClass = null;
+
+ String nn = String.join("_", namespace, name);
+
+ switch (nn) {
+ case "com.ext.UDFunction.StringFunctions_replace":
Review comment:
This is true, as long as the default value for the annotation properties
isn't set (which they are now), and they apply the annotation without filling
out the elements. There is no way to enforce the annotations are applied (at
all or correctly) at UDF compile time. But if they leave it out, we'd catch it
during our checks. So as you've stated annotations provide a wee bit more
advantage in this respect.
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