Apparatus for Meta Object Facility repository bootstrap

• US 6,754,671 B2
• Filed: 05/02/2001
• Issued: 06/22/2004
• Est. Priority Date: 05/02/2001
• Status: Active Grant

• Current Assignee: Oracle America, Inc. (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Buzek, Pavel, Hrebejk, Petr, Matula, Martin
• Primary Examiner(s): Robinson, Greta
• Assistant Examiner(s): Rayyan, Susan F.
• Application Number:
  US09/848,506
• Publication Number:
  US 20020165996A1
• Time in Patent Office: 1,147 Days
• Field of Search: 707/1, 707/10, 707/100, 707/103, 707/101, 713/2
• US Class Current: 713/2
• CPC Class Codes: G06F 16/986 Document structures and storage, e.g. HTML extensions
• CPC Class Codes: Y10S 707/955 Object-oriented
• CPC Class Codes: Y10S 707/99944 Object-oriented database structure

Abstract

A method for loading a model of Meta Object Facility (MOF) includes creating a first MOF instance including a model of MOF that is based upon a stored definition of MOF, rebuilding the first MOF instance to make it a metamodel of itself, instantiating the first MOF instance to create a second MOF instance, loading the stored definition of MOF into the second MOF instance and rebuilding the second MOF instance to make the second MOF instance a metamodel of the second MOF instance.

Claims

1. An apparatus for loading a model of Meta Object Facility (MOF), the apparatus comprising:

means for creating a first MOF instance including a model of MOF, said model of MOF being based upon a stored definition of MOF;

means for rebuilding said first MOF instance to make it a metamodel of itself;

means for instantiating said first MOF instance to create a second MOF instance, said instantiating including dynamically implementing interfaces;

means for loading said stored definition of MOF into said second MOF instance; and

means for rebuilding said second MOF instance to make said second MOF instance a metamodel of said second MOF instance.

2. The apparatus of claim 1 wherein said stored definition of MOF comprises an XMI definition of MOF.

3. The apparatus of claim 1, further comprising means for deleting said first MOF instance after said loading.

4. The apparatus of claim 1 wherein said means for creating a first MOF instance further comprises:

means for receiving a stored definition of MOF;

means for reading said stored definition a first time to create proxies for each MOF class, package and association; and

means for reading said stored definition a second time to read the MOF model into said proxies.

5. The apparatus of claim 1 wherein said means for rebuilding said first MOF instance further comprises means for setting the metaobject of at least one object in said first MOF instance to a corresponding object in said first MOF instance.

6. The apparatus of claim 1 wherein said means for creating a second MOF instance further comprises:

means for receiving a reference to an element of type “

Package”

;

means for creating a package proxy corresponding to said referenced package;

means for receiving an element contained by said referenced package;

means for creating a class proxy when said element is of type “

Class”

;

means for creating an association proxy when said element is of type “

Association”

; and

means for creating proxies for elements contained by a package when said element is of type “

Package”

.

7. The apparatus of claim 1 wherein said means for rebuilding said second MOF instance further comprises means for setting the metaobject of at least one object in said second MOF instance to a corresponding object in said second MOF instance.

8. An apparatus for loading a model of Meta Object Facility (MOF), the apparatus comprising:

boot loader to create a first MOF instance including a model of MOF, said model of MOF being based upon a stored definition of MOF;

a rebuilder to rebuild a MOF instance to make it a metamodel of itself;

an instantiator to instantiate said first MOF instance to create a second MOF instance, said instantiator further configured to dynamically implement interfaces; and

a loader to load said stored definition of MOF into said second MOF instance.

9. The apparatus of claim 8 wherein said stored definition of MOF comprises an XMI definition of MOF.

10. The apparatus of claim 8 wherein said apparatus if further configured to delete said first MOF instance after said stored definition of MOF is loaded into said second MOF instance.

11. The apparatus of claim 8 wherein said boot loader is further configured to:

receive a stored definition of MOF;

read said stored definition a first time to create proxies for each MOF class, package and association; and

read said stored definition a second time to read the MOF model into said proxies.

12. The apparatus of claim 8 wherein said rebuilder is further configured to set the metaobject of at least one object in said first MOF instance to a corresponding object in said first MOF instance.

13. The apparatus of claim 8 wherein said instantiator is further configured to:

receive a reference to an element of type “

Package”

;

create a package proxy corresponding to said referenced package;

receive an element contained by said referenced package;

create a class proxy when said element is of type “

Class”

;

create an association proxy when said element is of type “

Association”

; and

create proxies for elements contained by a package when said element is of type “

Package”

.

14. The apparatus of claim 8 wherein said rebuilder is further configured to said set the metaobject of at least one object in said second MOF instance to a corresponding object in said second MOF instance.