Programmatically serializing complex objects using self-healing techniques

• US 7,150,004 B2
• Filed: 08/21/2002
• Issued: 12/12/2006
• Est. Priority Date: 08/21/2002
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: McHan, Samuel R. Jr., Russell, Feng-wei Chen, Reed, William D.
• Primary Examiner(s): Zhen, Wei
• Assistant Examiner(s): DENG, ANNA CHEN
• Application Number:
  US10/225,379
• Publication Number:
  US 20040039964A1
• Time in Patent Office: 1,574 Days
• Field of Search: 717106-109, 717/118, 717/148, 717/120, 709201-203, 709/229, 709/238, 709/248, 709/227, 709/246
• US Class Current: 717/118
• CPC Class Codes: G06F 9/4493 Object persistence

Abstract

Methods, systems, and computer program products for programmatically serializing complex objects (such as JavaBeans™). In contrast to prior art techniques, a manually-specified data type mapping specification is not required as input to the serialization process. Instead, the present invention programmatically generates this type mapping, responsive to encountering run-time exceptions during the serialization process. The serialization process is therefore “self-healing”. This approach is especially advantageous when serializing complex objects that may include complex data types and/or embedded objects. The programmatically-generated type mapping information is preferably used to generate a serialized version of the complex object, and can also be used during deserialization. In addition to improving serialization techniques, this type mapping information facilitates dynamic integration and transformation of data between heterogeneous formats.

Claims

1. A computer-implemented method of programmatically serializing complex objects, comprising steps of:

invoking, at run time, a serialization process on an object to be serialized;

encountering one or more errors that halt the run-time serialization process, due to missing type mappings that are needed to map from the object to a serialized form thereof;

programmatically resolving each encountered error, upon encountering each of the missing type mapping errors during the run-time serialization process, further comprising steps of;

programmatically analyzing an exception message resulting from each encountered error to locate therein a class name indicating a class of the object for which the type mapping is missing;

performing at least one of introspection and reflection on the class having the located class name to determine type information for fields of the class;

programmatically generating a type mapping for the class using the determined type information; and

using the programmatically generated type mapping for serializing the class of the object to the serialized form thereof; and

automatically restarting the serialization process after each encountered error is resolved.

2. The method according to claim 1, wherein the object is a JavaBean™

.

3. The method according to claim 1, further comprising the step of storing the programmatically generated type mappings in a mapping registry for subsequent use during the serialization process.

4. The method according to claim 3, further comprising the step of using selected ones of the stored type mappings when the serialization process is subsequently invoked for the object or for one or more other objects to be serialized, thereby avoiding the errors during the subsequent invocation for the object or the other objects.

5. The method according to claim 1, wherein output of the serialization process is a Simple Object Access Protocol (“

SOAP”

) encoded object.

6. The method according to claim 3, further comprising the step of:

invoking a deserialization process on a message to be deserialized, wherein the deserialization process uses the stored type mappings to generate an object version of the message.

7. A system for programmatically serializing complex objects, comprising:

means for invoking a run-time serialization process on an object to be serialized;

means for programmatically resolving each of one or more errors that are encountered, at run time, during the run-time serialization process and that halt the run-time serialization process, due to missing type mappings that are needed to map from the object to a serialized form thereof by programmatically invoking;

means for programmatically analyzing an exception message resulting from each encountered error to locate therein a class name indicating a class of the object for which the type mapping is missing;

means for performing at least one of introspection and reflection on the class having the located class name to determine type information for fields of the class;

means for programmatically generating a type mapping for the class using the determined type information; and

means for using the programmatically generated type mapping for serializing the class of the object to the serialized form thereof; and

means for automatically restarting the serialization process after each encountered error is resolved.

8. The system according to claim 7, wherein the object is a JavaBean™

.

9. The system according to claim 7, further comprising means for storing the programmatically generated type mappings in a mapping registry for subsequent use during the serialization process.

10. The system according to claim 9, further comprising means for using selected ones of the stored type mappings when the serialization process is subsequently invoked for the object or for one or more other objects, thereby avoiding the errors during the subsequent invocation for the object or the other objects.

11. The system according to claim 7, wherein output of the serialization process is a Simple Object Access Protocol (“

SOAP”

) encoded object.

12. The system according to claim 9, further comprising means for invoking a deserialization process on a message to be deserialized, wherein the deserialization process uses the stored type mappings to generate an object version of the message.

13. A computer program product for programmatically serializing complex objects, the computer program product embodied on one or more computer-readable media and comprising:

computer-readable program code for invoking a run-time serialization process on an object to be serialized;

computer-readable program code for programmatically resolving each of one or more errors that are encountered, at run time, during the run-time serialization process and that halt the run-time serialization process, due to missing type mappings that are needed to map from the object to a serialized form thereof, by programmatically invoking;

computer-readable program code for programmatically analyzing an exception message resulting from each encountered error to locate therein a class name indicating a class of the object for which the type mapping is missing;

computer-readable program code for performing at least one of introspection and reflection on the class having the located class name to determine type information for fields of the class;

computer-readable program code for programmatically generating a type mapping for the class using the determined type information; and

computer-readable program code for using the programmatically generated type mapping for serializing the class of the object to the serialized form thereof; and

computer-readable program code for automatically restarting the serialization process after each encountered error is resolved.

14. The computer program product according to claim 13, wherein the object is a JavaBean™

.

15. The computer program product according to claim 13, further comprising computer-readable program code for storing the programmatically generated type mappings in a mapping registry for subsequent use during the serialization process.

16. The computer program product according to claim 15, further comprising computer-readable program code for using selected ones of the stored type mappings when the serialization process is subsequently invoked for the object or for one or more other objects, thereby avoiding the errors during the subsequent invocation for the object or the other objects.

17. The computer program product according to claim 13, wherein output of the serialization process is a Simple Object Access Protocol (“

SOAP”

) encoded object.

18. The computer program product according to claim 15, further comprising computer-readable program code for invoking a deserialization process on a message to be deserialized, wherein the deserialization process uses the stored type mappings to generate an object version of the message.