Strategy for dynamically modeling ASN.1 data to an object model

• US 20020129331A1
• Filed: 12/15/2000
• Published: 09/12/2002
• Est. Priority Date: 12/15/2000
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Zhang, Xiaoyan, Humphrey, Randy Scott, Soper, Davis Kent, London Shrader, Theodore Jack
• Granted Patent: US 6,883,164 B2
• Time in Patent Office: Days
• US Class Current: 717/106
• CPC Class Codes: G06F 8/30 Creation or generation of source code
• CPC Class Codes: G06F 8/427 Parsing

Abstract

A method, program and system for mapping ASN.1 data to an object model are provided. The invention consists of identifying the start of a data stream and then generating a new object name for the data. Next, the data is parsed to get the identifier and the data length. Then the data'"'"'s tag type is analyzed. If the tag type is simple, a class diagram is generated for the data and then the source code for the data is generated. If the tag type is not simple, a subroutine is called to further parse the data before generating the class diagram and source code.

Claims

1. A method for mapping ASN.1 data to an object model, comprising:

identifying objects in ASN.1 data;

identifying attributes of the objects;

identifying the relationships between objects; and

generating an object model.

2. The method according to claim 1, further comprising:

identifying the start of a data stream;

generating a new object name for the data;

parsing the data to get the data identifier;

parsing the data to get the data length;

analyzing the tag type of the data;

generating a class diagram for the data if the tag type is simple; and

generating source code for the data.

3. The method according to claim 2, further comprising performing a subroutine to further parse the data content if the tag type is not simple.

4. The method according to claim 3, wherein the parsing subroutine comprises:

parsing the data content to get the identifier;

parsing the data content to get the data length; and

analyzing the tag type.

5. The method according to claim 4, further comprising:

if the tag type is simple, determining if the call to the subroutine is from the main routine;

if the call is from the main routine, recording the data tag number for further reference and returning the data to the main routine; and

if the call is not from the main routine, generating an attribute name for the data and returning the data to the main routine if the end of the data has been reached.

6. The method according to claim 5, further comprising recalling the parsing subroutine if the end of the data has not been reached.

7. The method according to claim 4, further comprising:

if the tag type is structured, generating a new class name for the data; and

recalling the parsing subroutine.

8. The method according to claim 4, further comprising:

if the tag type is explicit, further parsing the data content to get the data identifier and data length; and

analyzing the explicit tag type to determine the underlying tag type.

9. The method according to claim 8, further comprising:

if the underlying tag type is simple, generating an attribute name for the data; and

returning the data to a main routine if the end of the data has been reached.

10. The method according to claim 9, further comprising recalling the parsing subroutine if the end of the data has not been reached.

11. The method according to claim 8, further comprising:

if the underlying tag type is structured, generating a new class name for the data; and

recalling the parsing subroutine.

13. The computer program product according to claim 12, further comprising:

instructions for identifying the start of a data stream;

instructions for generating a new object name for the data;

instructions for parsing the data to get the data identifier;

instructions for parsing the data to get the data length;

instructions for analyzing the tag type of the data;

instructions for generating a class diagram for the data if the tag type is simple; and

instructions for generating source code for the data.

14. The computer program product according to claim 13, further comprising a subroutine for further parsing the data content if the tag type is not simple.

15. The computer program product according to claim 14, wherein the parsing subroutine comprises:

instructions for parsing the data content to get the identifier;

instructions for parsing the data content to get the data length; and

instructions for analyzing the tag type.

16. The computer program product according to claim 15, further comprising:

if the tag type is simple, instructions for determining if the call to the subroutine is from the main routine;

if the call is from the main routine, instructions for recording the data tag number for further reference and returning the data to the main routine; and

if the call is not from the main routine, instructions for generating an attribute name for the data and returning the data to the main routine if the end of the data has been reached.

17. The computer program product according to claim 16, further comprising instructions for recalling the parsing subroutine if the end of the data has not been reached.

18. The computer program product according to claim 15, further comprising:

if the tag type is structured, instructions for generating a new class name for the data; and

instructions for recalling the parsing subroutine.

19. The computer program product according to claim 15, further comprising:

if the tag type is explicit, instructions for further parsing the data content to get the data identifier and data length; and

instructions for analyzing the explicit tag type to determine the underlying tag type.

20. The computer program product according to claim 19, further comprising:

if the underlying tag type is simple, instructions for generating an attribute name for the data; and

instructions for returning the data to a main routine if the end of the data has been reached.

21. The computer program product according to claim 20, further comprising instructions for recalling the parsing subroutine if the end of the data has not been reached.

22. The computer program product according to claim 19, further comprising:

if the underlying tag type is structured, instructions for generating a new class name for the data; and

instructions for recalling the parsing subroutine.

12. A computer program product in a computer readable medium for use in a data processing system, for mapping ASN.1 data to an object model, the computer program product comprising:

instructions for identifying objects in ASN.1 data;

instructions for identifying attributes of the objects;

instructions for identifying the relationships between objects; and

instructions for generating an object model.

23. A system for mapping ASN.1 data to an object model, comprising:

means for identifying objects in ASN.1 data;

means for identifying attributes of the objects;

means for identifying the relationships between objects; and

means for generating an object model.