CA2398148A1 - System and method for managing bi-directional relationships between objects - Google Patents

System and method for managing bi-directional relationships between objects Download PDF

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Publication number
CA2398148A1
CA2398148A1 CA002398148A CA2398148A CA2398148A1 CA 2398148 A1 CA2398148 A1 CA 2398148A1 CA 002398148 A CA002398148 A CA 002398148A CA 2398148 A CA2398148 A CA 2398148A CA 2398148 A1 CA2398148 A1 CA 2398148A1
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Prior art keywords
directional
objects
peer
proxy
relationships
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CA002398148A
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French (fr)
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CA2398148C (en
Inventor
Gordon James Yorke
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OIC Acquisition I Corp
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OIC Acquisition I Corp
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24—Querying
    • G06F16/245—Query processing
    • G06F16/2455—Query execution
    • G06F16/24553—Query execution of query operations
    • G06F16/24562—Pointer or reference processing operations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24—Querying
    • G06F16/242—Query formulation
    • G06F16/2433—Query languages
    • G06F16/2438—Embedded query languages
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/28—Databases characterised by their database models, e.g. relational or object models
    • G06F16/289—Object oriented databases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99941—Database schema or data structure
    • Y10S707/99943—Generating database or data structure, e.g. via user interface

Abstract

A bi-directional relationship manager is described for setting a new reference value for managing bi-directional relationships between objects in an object model. The bi-directional relationship manager receives bi-directional relationship information indicating interrelation between objects having one or more bi-directional relationships. It creates proxy objects based on the bi-directional relationship information for selected bi-directional relationship objects having bi-directional relationships. A created proxy object receives a new reference value to be set in a selected object relating to a bi-directional relationship. It determines, using one or more of the proxy objects, a new peer value to be set in a peer object which has the bi-directional relationship with the selected object, and sets the new peer value to a proxy object created for the peer object.. It may also update reference values of other related objects that are related to the selected object through one or more bi-directional relationships to reflect the change in references.

Claims (50)

1. A method for setting a new reference value for managing bi-directional relationships between objects in an object model, the method comprising the steps of:
receiving bi-directional relationship information indicating interrelation between objects having one or more bi-directional relationships;
creating proxy objects based on the bi-directional relationship information for selected bi-directional relationship objects having bi-directional relationships;
receiving a new reference value to be set in a selected object relating to a bi-directional relationship;
determining, using one or more of the proxy objects, a new peer value to be set for a peer object which has the bi-directional relationship with the selected object; and setting the new peer value to a proxy object created for the peer object.
2. The method as claimed in claim 1, wherein the bi-directional relationship information receiving step comprises the steps of:
receiving object model meta-data defining relationships between objects in the object model; and retrieving reference value information that represents reference values indicating current peer objects for the bi-directional relationships.
3. The method as claimed in claim 1, wherein the bi-directional relationship information receiving step receives the reference value information from a data storage in which data corresponding to the objects is stored.
4. The method as claimed in claim 1, wherein the bi-directional relationship information receiving step receives the reference value information from a new object that is newly created by a user.
5. The method as claimed in claim 1, wherein the bi-directional relationship information receiving step receives the reference value information that includes a collection of reference values for a bi-directional relationship object which references many peer objects.
6. The method as claimed in claim 1, wherein the proxy object creating step creates proxy objects at uni-directional peer relationships that comprise bi-directional relationships.
7. The method as claimed in claim 6, wherein the proxy object creating step creates a proxy object for each of a pair of one-to-one uni-directional peer relationships that form a one-to-one bi-directional relationship.
8. The method as claimed in claim 6, wherein the proxy object creating step creates a proxy object for each of a one-to-many uni-directional peer relationship and one-to-one uni-directional peer relationships that form a one-to-many bi-directional relationship.
9. The method as claimed in claim 6, wherein the proxy object creating step creates a proxy object for each of uni-directional one-to-many peer relationships that form a many-to-many bi-directional relationship.
10. The method as claimed in claim 1, wherein the new peer value determining step comprises a step of passing the new reference value through related proxy objects that are related to the bi-directional relationship:
11. The method as claimed in claim 1, wherein the new peer value contains a collection of reference values which is determined based on the new reference value.
12. The method as claimed in claim 1, wherein the new reference value represents addition, removal or change of a reference value.
13. The method as claimed in claim 1, wherein the setting step sets a value null when the determining step determines to remove the bi-directional relationship.
14. The method as claimed in claim 1, wherein the setting step sets a new peer value by replacing an old reference value with the new peer value.
15. The method as claimed in claim 1 further comprising steps of:
determining, using one or more of the proxy objects, another new peer value to be set in a new peer object which is referenced by the new reference value set for the selected object; and setting another new peer value to a proxy object created for the new peer object.
16. The method as claimed in claim 1 further comprising steps of:
determining, using one or more of the proxy objects, an updating reference value for a related object that is related to the selected object through one or more original or new bi-directional relationships; and setting the updating reference value in a proxy object created for the related object.
17. The method as claimed in claim 16, wherein the updating reference value determining step and the updating reference value setting step are repeated for all related objects so as to maintain bi-directional relationship integrity.
18. The method as claimed in claim 16, wherein the updating reference value determining step comprises a step of passing the new reference value through related proxy objects that are created for the related objects.
19. A method for creating proxy objects for managing bi-directional relationships between objects in an object model, the method comprising the steps of:
receiving bi-directional relationship information indicating interrelation between objects having one or more bi-directional relationships; and creating proxy objects based on the bi-directional relationship information for selected bi-directional relationship objects having bi-directional relationships at peer relationships that comprise the bi-directional relationships, a created proxy object being capable of receiving a new reference value to be set in a selected object relating to a bi-directional relationship, determining, using one or more of the proxy objects, a new peer value to be set in a peer object which has the bi-directional relationship with the selected object, and setting the new peer value to a proxy object created for the peer object.
20. The method as claimed in claim 19, wherein the bi-directional relationship information receiving step comprises the steps of:
receiving object model meta-data defining relationships between objects in the object model; and retrieving reference value information that represents reference values indicating current peer objects for the bi-directional relationships.
21. The method as claimed in claim 20 further comprising a step of setting proxy reference to the selected bi-directional relationship objects to indicate that the selected bi-directional relationship uses one or more proxy objects.
22. The method as claimed in claim 20, wherein the object model meta-data receiving step comprises a step of receiving attribute information regarding attributes of objects used to hold reference values indicating one or more peer objects which a bi-directional relationship object references; and the retrieving step retrieves the reference value information based on the attribute information.
23. The method as claimed in claim 20, wherein the retrieving step retrieves the reference value information that includes a collection of reference values for a selected bi-directional relationship object which references many peer objects.
24. The method as claimed in claim 20, wherein the retrieving step retrieves the reference value information from a data storage in which data corresponding to the objects is stored.
25. The method as claimed in claim 20, wherein the retrieving step retrieves the reference value information from a new object that is newly created by a user.
26. The method as claimed in claim 19, wherein the proxy object creating step creates proxy objects at uni-directional peer relationships that comprise bi-directional relationships.
27. The method as claimed in claim 26, wherein the proxy object creating step creates a proxy object for each of a pair of one-to-one uni-directional peer relationships that form a one-to-one bi-directional relationship.
28. The method as claimed in claim 26, wherein the proxy object creating step creates a proxy object for each of a one-to-many uni-directional peer relationship and one-to-one uni-directional peer relationships that form a one-to-many bi-directional relationship.
29. The method as claimed in claim 26, wherein the proxy object creating step creates a proxy object for each of uni-directional one-to-many peer relationships that form a many-to-many bi-directional relationship.
30. The method as claimed in claim 19, wherein the new peer value contains a collection of reference values which is determined based on the new reference value.
31. The method as claimed in claim 19, wherein the new reference value represents addition, removal or change of a reference value.
32. A method for maintaining bi-directional relationship integrity between objects in an object model, the method comprising the steps of:
receiving bi-directional relationship information indicating interrelation between objects having one or more bi-directional relationships;
creating proxy objects based on the bi-directional relationship information for selected bi-directional relationship objects having bi-directional relationships;
receiving a new reference value to be set in a selected object relating to a bi-directional relationship;
determining, using one or more of the proxy objects, an updating reference value for a related object that is related to the selected object through one or more original or new bi-directional relationships;
setting the updating reference value in a proxy object created for the related object; and repeating the updating reference value determining step and the updating reference value setting step for all related objects so as to maintain bi-directional relationship integrity.
33. The method as claimed in claim 32, wherein the updating reference value determining step comprises a step of passing the new reference value through related proxy objects that are created for the related objects.
34. A bi-directional relationship manager for setting a new reference value for managing bi-directional relationships between objects in an object model, the bi-directional relationship manager comprising:
a bi-directional relationship information receiver for receiving bi-directional relationship information indicating interrelation between objects having one or more bi-directional relationships; and a proxy object creator for creating proxy objects based on the bi-directional relationship information for selected bi-directional relationship objects having bi-directional relationships at peer relationships that comprise the bi-directional relationships, a created proxy object receiving a new reference value to be set in a selected object relating to a bi-directional relationship, determining, using one or more of the proxy objects, a new peer value to be set in a peer object which has the bi-directional relationship with the selected object, and setting the new peer value to a proxy object created for the peer object.
35. The bi-directional relationship manager as claimed in claim 34, wherein the bi-directional relationship information receiver comprises:
a meta-data receiver for receiving object model meta-data defining relationships between the objects; and a reference value retriever for retrieving reference value information that represents reference values indicating current peer objects for the bi-directional relationships.
36. The bi-directional relationship manager as claimed in claim 35, wherein the meta-data receiver receives attribute information regarding attributes of objects used to hold reference values indicating one or more peer objects which a bi-directional relationship object references; and the reference value retriever retrieves the reference value information based on the attribute information.
37. The bi-directional relationship manager as claimed in claim 35, wherein the reference value retriever retrieves the reference value information that includes a collection of reference values for a selected bi-directional relationship object which references many peer objects.
38. The bi-directional relationship manager as claimed in claim 35, wherein the reference value retriever retrieves the reference value information from a data storage in which data corresponding to the objects is stored.
39. The bi-directional relationship manager as claimed in claim 35, wherein the reference value retriever retrieves the reference value information from a new object that is newly created by a user.
40. The bi-directional relationship manager as claimed in claim 34, wherein the proxy object creating step creates proxy objects at uni-directional peer relationships that comprise the bi-directional relationships.
41. The bi-directional relationship manager as claimed in claim 40, wherein the proxy object creating step creates a proxy object for each of a pair of one-to-one uni-directional peer relationships that form a one-to-one bi-directional relationship.
42. The bi-directional relationship manager as claimed in claim 40, wherein the proxy object creating step creates a proxy object for each of a one-to-many uni-directional peer relationship and one-to-one uni-directional peer relationships that form a one-to-many bi-directional relationship.
43. The bi-directional relationship manager as claimed in claim 40, wherein the proxy object creating step creates a proxy object for each of uni-directional one-to-many peer relationships that form a many-to-many bi-directional relationship.
44. A proxy object for setting a new reference value for managing bi-directional relationships between objects in an object model, the proxy object comprising:
a new value receiver for receiving a new reference value to be set in a selected object relating to a bi-directional relationship;
a new peer value determiner for determining a new peer value to be set in a peer object which has the bi-directional relationship with the selected object, the new peer value determiner using bi-directional relationship information indicating interrelation between objects having one or more bi-directional relationships;
and a new peer value setter for setting the new peer value to a proxy object created for the peer object.
45. The proxy object as claimed in claim 44, wherein the new peer value determiner determines the new peer value by passing the new reference value through related proxy objects that are related to the bi-directional relationship:
46. The proxy object as claimed in claim 44, wherein the new peer value contains a collection of reference values which is determined based on the new reference value.
47. The proxy object as claimed in claim 44, wherein the new reference value represents addition, removal or change of a reference value.
48. Computer media storing the instructions or statements for use in the execution in a computer of a method for creating proxy objects for managing bi-directional relationships between objects in an object model, the method comprising the steps of:
receiving bi-directional relationship information indicating interrelation between objects having one or more bi-directional relationships; and creating proxy objects based on the bi-directional relationship information for selected bi-directional relationship objects having bi-directional relationships at peer relationships that comprise the bi-directional relationships, a created proxy object being capable of receiving a new reference value to be set in a selected object relating to a bi-directional relationship, determining, using one or more of the proxy objects, a new peer value to be set in a peer object which has the bi-directional relationship with the selected object, and setting the new peer value to a proxy object created for the peer object.
49. Electronic signals for use in the execution in a computer of a method for creating proxy objects for managing bi-directional relationships between objects in an object model, the method comprising the steps of:
receiving bi-directional relationship information indicating interrelation between objects having one or more bi-directional relationships; and creating proxy objects based on the bi-directional relationship information for selected bi-directional relationship objects having bi-directional relationships at peer relationships that comprise the bi-directional relationships, a created proxy object being capable of receiving a new reference value to be set in a selected object relating to a bi-directional relationship, determining, using one or more of the proxy objects, a new peer value to be set in a peer object which has the bi-directional relationship with the selected object, and setting the new peer value to a proxy object created for the peer object.
50. A computer program product for use in the execution in a computer of a method for creating proxy objects for managing bi-directional relationships between objects in an object model, the product comprising:
a module for receiving bi-directional relationship information indicating interrelation between objects having one or more bi-directional relationships;
and a module for creating proxy objects based on the bi-directional relationship information for selected bi-directional relationship objects having bi-directional relationships at peer relationships that comprise the bi-directional relationships, a created proxy object being capable of receiving a new reference value to be set in a selected object relating to a bi-directional relationship, determining, using one or more of the proxy objects, a new peer value to be set in a peer object which has the bi-directional relationship with the selected object, and setting the new peer value to a proxy object created for the peer object.
CA002398148A 2001-08-15 2002-08-14 System and method for managing bi-directional relationships between objects Expired - Lifetime CA2398148C (en)

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US09/930,800 US7020659B2 (en) 2001-08-15 2001-08-15 System and method for managing bi-directional relationships between objects
US09/930,800 2001-08-15

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US7020659B2 (en) 2006-03-28
CA2398148C (en) 2009-11-10

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