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Hi everyone,
I have a question regarding the ability to cast java objects via the RPG -
Java interface.
Basically, I have a java program that performs xslt transforms on some xml.
To do this you need to pass a javax.xml.transform.Source object to the
transformer. Now this is actually an interface and can only be created by
instantiating an object that implements the interface (I believe). You can
then cast the object accordingly.
I cast during construction as below:
javax.xml.transform.Source xmlSource =
new javax.xml.transform.stream.StreamSource(xmlFile);
To prototype this method in RPG would give you something like:
* new StreamSource( File )...
D new_StreamSource...
D pr O EXTPROC(*JAVA
D :'javax.xml.transform-
D .stream.StreamSource'
D :*CONSTRUCTOR)
D Class(*JAVA
D :'javax.xml.transform-
D .Source')
D File O Class(*JAVA
D :'java.io.File')
But, of course, I get the following message if I try this: 'The return value
of a Java constructor must have the same class as the method.' (I'm trying
to use the StreamSource constructor to create a StreamSource object cast as
a Source object)
As javax.xml.transform.Source is an interface I can't simply instantiate it
can I?
Does anybody have any ideas on how I can cast a concrete object to an
abstract object in RPG?
Am I missing something really simple here?
Cheers
Larry Ducie
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