Using Java Analysis Studio with Objy

import COM.objy.db.*; //Import Objectivity for Java

import COM.objy.db.app.*;

class ObjyEventSource implements EventSource {

public void openFederation() {

try {

connection = Connection.open(federation, openmode);

} catch (DatabaseNotFoundException exception) {

.....

} catch (DatabaseOpenException exception) {

.....

}

SchemaPolicy policy = connection.getSchemaPolicy();

.....

policy.setPolicyLocked();

session = new Session();

session.setOpenMode(openmode);

session.begin();

CMSFD = session.getFD();

dbItr = CMSFD.containedDBs();

while(dbItr.hasMoreElements()) {

ooDBObj CMSDB = (ooDBObj) dbItr.nextElement();

evcItr = CMSDB.contains();

.....

}

}

}

• We developed a JAS “Data Interface Module” - ObjyDIM

  • Implements “LocalDIM” with a Wizard calling ObjyEventSource

public hep.analysis.EventSource openDataSet(String name)

{

return new ObjyEventSource(name);

}

• ObjyEventSource opens the named federation, then supplies methods to:
  • Iterate through named (or all) database(s)
  • For each database, iterate through named (or all) containers
  • For each container, iterate through all “Event” objects
• The JAS “beforeFirstEvent”, “getNextEvent”, etc. methods are thus supported

• “Work in Progress”

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