bsloane1650 commented on a change in pull request #273: WIP: Add User Defined
Functions Capability
URL: https://github.com/apache/incubator-daffodil/pull/273#discussion_r331707033
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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":
+ functionClass = new Replace();
+ break;
+ case "com.ext.UDFunction.StringFunctions_compare":
+ functionClass = new Compare();
+ break;
+ }
+ return functionClass;
Review comment:
The naming here is a bit confusing. It sounds like you are returning a the
Class<?> object corresponding to the function, but you are actually returning
an instantiated object.
I suggest renaming to functionObject here and in the method name.
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