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Hi everybody,

I have solved my casting problem - the casting is implied by the prototypes used.

It would appear that the casting is done by the RPG - Java interface during the mrethod call. My problem was that I was using my StrteamSource object as a parameter to a method requiring a Source object. To enable the casting to take place I needed to specify the parameter as a Source object in the method's RPG prototype.

Thus, I pass a StreamSource object using a Source parameter definition. As the StreamSource object is of type Source, the casting takes place and all is OK:

* transform( StreamSource, StreamResult )...
D transform       pr                  EXTPROC(*JAVA
D                                     :'javax.xml.transform-
D                                     .Transformer'
D                                     :'transform')
D Source                          O   Class(*JAVA
D                                     :'javax.xml.transform-
D                                     .Source')
D Result                          O   Class(*JAVA
D                                     :'javax.xml.transform-
D                                     .Result')

Although the prototype definition requires a Source and Result object, I actually pass a StreamSource and StreamResult object.

Or Am I correct..? It it really a case that the RPG program actually has an "object" reference and the "object" is always passed. It is up to the java runtime to check whether there is a type mismatch?

Cheers

Larry Ducie



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