trait UserDefinedFunction extends Serializable
Interface that all User Defined Functions classes must implement.
It implements the java.io.Serializable class and must have the UserDefinedFunctionIdentification annotation applied and filled in with the values to be used in the schema.
It must also have an evaluate method that contains the functionality it is offering
Any "state" variables should be passed in during overloaded UserDefinedFunctionProvider initialization
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- @UserDefinedFunctionIdentification()
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This is the documentation for the Apache Daffodil Scala API.
Package structure
org.apache.daffodil.sapi - Provides the classes necessary to compile DFDL schemas, parse and unparse files using the compiled objects, and retrieve results and parsing diagnostics
org.apache.daffodil.udf - Provides the classes necessary to create User Defined Functions to extend the DFDL expression language
org.apache.daffodil.runtime1.layers.api - Provides the classes necessary to create custom Layer extensions to DFDL.