Mapping between native data type instances

• US 20040177160A1
• Filed: 03/03/2003
• Published: 09/09/2004
• Est. Priority Date: 02/20/2003
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Beisiegel, Michael, Przybylski, Piotr, Gartner, Harold Jeffrey, Seelemann, Ilene Ruth, Seto, Norman K. W.
• Granted Patent: US 7,058,645 B2
• Time in Patent Office: Days
• US Class Current: 709/246
• CPC Class Codes: G06F 16/84 Mapping; Conversion
• CPC Class Codes: Y10S 707/99942 Manipulating data structure, e.g. compression, compaction, compilation

Abstract

Mapping of a first native data type instance to a second native data type instance is performed in three stages: the first native data type instance is converted into a first programming language and platform independent representation conforming to a first schema capable of defining base and derived data types; the first programming language and platform independent representation is transformed into a second programming language and platform independent representation conforming to a second schema capable of defining base and derived data types; and the second programming language and platform independent representation is converted into the second native data type instance. The programming language and platform independent representations may be event-based extensible Markup Language (XML) representations implemented according to the Simple API for XML (SAX). The transformation may be governed by an extensible Stylesheet Language Transform (XSLT) stylesheet.

Claims

1. A method of mapping a first native data type instance to a second native data type instance, comprising:

converting the first native data type instance into a first programming language and platform independent representation conforming to a first schema capable of defining base and derived data types;

transforming said first programming language and platform independent representation into a second programming language and platform independent representation conforming to a second schema capable of defining base and derived data types; and

further converting said second programming language and platform independent representation into said second native data type instance.

2. The method of claim 1 wherein said first and second programming language and platform independent representations are extensible Markup Language (XML) representations and said first and second schemas are XML schemas.

3. The method of claim 2 wherein said XML representations are event based XML representations.

4. The method of claim 3 wherein said event based XML representations are implemented according to the Simple API for XML (SAX) Application Programming Interface (API).

5. The method of claim 2 wherein said transforming is governed by an XML Stylesheet Transformation Language (XSLT) stylesheet.

6. The method of claim 5 wherein said transforming employs SUN™

javax.xml.transform and javax.xml.transform.sax classes.

7. The method of claim 2 wherein said XML schemas are the Web Services Description Language (WSDL) schema.

8. The method of claim 7 wherein said converting, transforming, and further converting implements a Web service operation.

9. The method of claim 1 further comprising:

transforming said first or second programming language and platform independent representation into a third programming language and platform independent representation conforming to a third schema capable of defining base and derived data types; and

converting said third programming language and platform independent representation into a third native data type instance.

13. A computer program product having media including computer programmed instructions for directing a computing device to implement the method of any of claims 1 to 12.

14. A computing device comprising a processor and persistent storage memory in communication with said processor storing processor readable instructions for directing said device to undertake the method of any of claims 1 to 12.

10. A method of generating a single set of document parsing events from a plurality of sets of document parsing events, comprising:

receiving said plurality of sets of document parsing events, said plurality of sets including a plurality of start document events and a plurality of end document events;

firing a leading start document event;

firing the events of said received plurality of sets of document parsing events that are not start document events or end document events; and

firing a trailing end document event.

11. The method of claim 10 wherein said document parsing events are generated in accordance with an event-based extensible Markup Language (XML) Application Programming Interface (API).

12. The method of claim 11 wherein said event-based XML API is the Simple API for XML (SAX).

15. A computer program product having media including computer programmed instructions for directing a computing device to implement a software component representative of a Web service message having one or more parts, said software component comprising:

for each of said parts;

a first software component adapted to convert the part into a programming language and platform independent representation of the part; and

a second software component adapted to convert said programming language and platform independent representation of the part into said part.

16. The computer program product of claim 15, wherein said programming language and platform independent representation is an extensible Markup Language (XML) representation.

17. The computer program product of claim 16, wherein said XML representation is implemented according to the Simple API for XML (SAX) Application Programming Interface (API).

18. The computer program product of claim 17, wherein said first software component has, for each of said parts, an XMLReader object for generating XML document parsing events, and said second software component has, for each of said parts, a ContentHandler object for handling XML document parsing events.

19. The computer program product of claim 15 wherein said software component comprises a Web Services Integration Framework (WSIF) message object.

20. The computer program product of claim 15 wherein each of said parts has a format compatible with a format of a referenced Web service message.