Creating new archiver in java Swarm

[Tom Wainwright]

Hello,

I have recently gotten back to working in Swarm, specifically building a
food-web model in Java.  I have tried and failed to create a new archiver
object (both lisp and hdf5 versions) in a model to record results, and seem
to have a fundamental misunderstanding of how archivers work in javaswarm. 
I can't find a working example of how to do this on the web site.

First, a snippet of test code that I added to jheatbugs at the end of
buildObjects () (just before "return this") in HeatbugObserverSwarm.java.

    //Test archive:
    LispArchiverImpl testArch;
    testArch = new LispArchiverImpl (getZone());
    //LispArchiverCImpl testArch;
    //testArch = new LispArchiverCImpl (getZone());
    testArch.setPath("test_out.scm");
    testArch.putShallow$object("testing", heatbugList);

(The commented lines are an alternative I tried that also failed.)  The
code above results in a compile error:
        HeatbugObserverSwarm.java:281: cannot resolve symbol
        symbol  : method setPath  (java.lang.String)
        location: class swarm.defobj.LispArchiverImpl
            testArch.setPath("test_out.scm");
                   
^                                                                   
Apparently, the setPath method doesn't exist in LispArchiverImpl (nor does
create$setPath).  Looking back at the reference book, I saw that these are
only in the ...CImpl classes, not the plain ...Impl classes.  However,
using the CImpl classes results in an error on the creator line.

Question 1:  What is the difference between CImpl and Impl classes, and
which should I be using in general??  This doesn't seem to be covered in
the refbook.

Question 2:  Can someone show me how to create an archiver and write to
it?  I've managed to write to the global archivers, but I want to be able
to save to a separate file.

Thanks in advance!
-- 
Tom Wainwright
NOAA/NMFS/NWFSC
2030 S Marine Science Dr
Newport, OR 97365 USA
address@hidden

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