Example — Implementing an Association Provider

A complete association provider must implement all AssociatorProvider methods. For brevity, the code segment in the following example implements only the associators method. The CIM Object Manager passes values for assocName, objectName, role, resultRole, includeQualifiers, includeClassOrigin, and propertyList to the association provider.

Example 5–4 prints the name of a CIM association class and the CIM class or instance whose associated objects are to be returned. This provider handles instances of example_teacher and example_student classes.

Example 5–4 Implementing an Association Provider

public Vector associators(CIMObjectPath assocName,
        CIMObjectPath objectName, String role,
				 String resultRole, boolean includeQualifiers,
				 boolean includeClassOrigin, String propertyList[]) throws CIMException {
    System.out.println("Associators "+assocName+" "+objectName);
	   if (objectName.getObjectName()equalsIgnoreCase("example_teacher")) {
		     Vector v = new Vector();
		     if ((role != null)  &&
		         (!role.equalsIgnoreCase("teaches"))) {
		          // Teachers only play the teaches role.
		          return v;
		     }
		 // Get the associators of a teacher
		 CIMProperty nameProp = (CIMProperty)objectName.getKeys().elementAt(0);
		 String name = (String)nameProp.getValue().getValue();
		 // Get the student class
		 CIMObjectPath tempOp = new CIMObjectPath("example_student");
		 tempOp.setNameSpace(assocName.getNameSpace());
		 CIMClass cc = cimom.getClass(tempOp, false);
    // Test the instance name passed by objectName
    // and return the associated instances of the student class.
  	 if(name.equals("teacher1")) {
		     // Get students for teacher1
		     CIMInstance ci = cc.newInstance();
		     ci.setProperty("name", new CIMValue("student1"));
		     v.addElement(ci.filterProperties(propertyList,
			           includeQualifiers, includeClassOrigin));
		     ci = cc.newInstance();
		     ci.setProperty("name", new CIMValue("student2"));
		     v.addElement(ci.filterProperties(propertyList,
			           includeQualifiers, includeClassOrigin));
		     return v;
		  }
}