System and method for XML data binding

• US 20030163603A1
• Filed: 11/26/2002
• Published: 08/28/2003
• Est. Priority Date: 02/22/2002
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: Oracle International Corporation (Oracle Corporation)
• Inventors: Fry, Chris, Ziegler, Scott
• Granted Patent: US 7,962,925 B2
• Time in Patent Office: Days
• US Class Current: 719/328
• CPC Class Codes: G06F 8/427 Parsing

Abstract

A schema parser can be used in data binding to create a schema object model when given an XML schema. Java classes can be generated using the schema object model, which correspond to elements and types in the schema. Mapping can be done in each direction between the schema and Java classes, which can be written to a type mapping directory. The schema object model can also contain mappings between each Java class and an XSD type. The mappings in the type mapping directory can then be used to generate XML when given a Java object tree, and can be used to create and populate a Java class when given an XML instance matching the schema object model.

Claims

1. A system for data binding, comprising:

a schema compiler adapted to accept a schema for an XML document and generate a set of interfaces that map any types and elements of the schema into Java classes; and

a runtime API for mapping between the XML document and the Java classes.

2. A system according to claim 1, wherein said runtime API is further capable of mapping between the XML document and a content tree of at least one of existing and schema-derived Java classes.

3. A system according to claim 2, wherein said runtime API is further capable of validating the content tree against the schema.

4. A system according to claim 1, further comprising a parser for parsing the XML document for mapping.

5. A system according to claim 1, wherein said schema compiler is adapted to accept and XSD schema.

6. A system according to claim 5, wherein said runtime API is further capable of validating the XML document against the XSD schema and reporting any discrepancies.

7. A system according to claim 1, wherein said schema compiler adapted to accept WSDL code to be used in generating the set of interfaces and Java classes.

8. A system according to claim 1, further comprising a parser API for generating XML to be mapped to Java classes.

9. A system according to claim 1, further comprising a web services subsystem for supporting web services.

10. A system according to claim 1, further comprising a schema parser for parsing the schema and generating a schema object model.

11. A system according to claim 10, further comprising a schema writer for taking the schema object model and generating an XML schema representation.

12. A system according to claim 1, further comprising a type mapping directory, containing the mapping in both directions between types in the schema and the Java classes.

13. A system according to claim 12, wherein said type mapping directory contains generated classes implementing DOM interfaces and generic XSD object interfaces, and do not contain any source code.

14. A system according to claim 13, further comprising a pool of empty object trees based on the generated classes.

15. A system according to claim 14, further comprising an XML writer adapted to use said pool of empty object trees to output XML when given an object tree.

16. A system according to claim 13, wherein said runtime API can clone an object tree for use in binding.

17. A system for data binding, comprising:

a schema parser for generating a schema object model when given an XML schema;

means for generating Java classes from the schema object model that correspond to elements and types in the schema; and

a type mapping directory for containing mapping between the XML schema and the Java classes.

18. A system according to claim 17, further comprising:

an instance parser that can be initiated with the schema object model and can prefill data structures.

19. A system according to claim 18, further comprising:

an XSD instance writer adapted to use the type mapping directory and prefilled data structures to output XML when given an object tree.

20. A system for data binding, comprising:

a schema parser for generating a schema object model when given an XML schema;

means for generating Java classes from the schema object model that correspond to elements and types in the schema;

means for mapping each of the Java class to an XSD type; and

a type mapping directory for containing mapping between the XML schema, Java classes, and XSD types.

21. A system according to claim 20, further comprising a static method for each of the generated Java classes that can take an XML instance and populate the appropriate Java class.

22. A method for data binding, comprising:

using a schema parser to create a schema object model when given an XML schema;

generating Java classes using the schema object model, the Java classes corresponding to elements and types in the schema; and

mapping in each direction between the schema and Java classes and writing the mapping to a type mapping directory.

23. A method according to claim 22, wherein said schema object model contains mappings between each Java class and an XSD type.

24. A method according to claim 23, further comprising:

using the mapping in the type mapping directory to generate XML when given a Java object tree.

25. A method according to claim 23, further comprising:

using the mapping in the type mapping directory to create and populate a Java class when given an XML instance matching the schema object model.

26. A computer-readable medium, comprising:

means for using a schema parser to create a schema object model when given an XML schema;

means for generating Java classes using the schema object model, the Java classes corresponding to elements and types in the schema; and

means for mapping in each direction between the schema and Java classes and writing the mapping to a type mapping directory.

27. A computer program product for execution by a server computer for data binding, comprising:

computer code for using a schema parser to create a schema object model when given an XML schema;

computer code for generating Java classes using the schema object model, the Java classes corresponding to elements and types in the schema; and

computer code for mapping in each direction between the schema and Java classes and writing the mapping to a type mapping directory.

28. A system for data binding, comprising:

means for using a schema parser to create a schema object model when given an XML schema;

means for generating Java classes using the schema object model, the Java classes corresponding to elements and types in the schema; and

means for mapping in each direction between the schema and Java classes and writing the mapping to a type mapping directory.

29. A computer system comprising:

a processor;

object code executed by said processor, said object code configured to;

use a schema parser to create a schema object model when given an XML schema;

generate Java classes using the schema object model, the Java classes corresponding to elements and types in the schema; and

map in each direction between the schema and Java classes and writing the mapping to a type mapping directory.