Method for effective dating object models

Patent metadata

Field	Value
Publication number	US-10262020-B2
Application number	US-201615041914-A
Country	US
Kind code	B2
Filing date	Feb 11, 2016
Priority date	Feb 11, 2016
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

An effective dater provides effective dating to object in a runtime environment. The effective dater identifies an access to a first field of a first object during runtime of a program. The first object is not effective date enabled. The effective date of determines whether the effective dating is to be applied to the first field. In response to determining that effective dating is to be applied to the first field, the effective dater redirects the access to a second object. The second object is effective date enabled. The effective dater then accesses the effective dated value in the second field of the second object according to an access context.

First claim

What is claimed is:

1. A method for providing effective dating to objects in a runtime environment, the method comprising:
identifying a join point in a byte stream that indicates an access to a first field of a first object during runtime of a program, wherein the first object is not effective date enabled to simultaneously store different values for the first field that are in effect over different date ranges;
identifying a pointcut expression that matches the join point;
determining if the pointcut expression indicates that effective dating is to be applied to the first field;
responsive to determining that the pointcut expression indicates that effective dating is to be applied to the first field, integrating instructions into the byte stream that redirect the access to a second object, wherein the second object is effective date enabled to simultaneously store different values that are in effect for a second field over different date ranges; and
accessing an effective dated value in the second field of the second object according to an access context that indicates a date range for the effective dated value.

2. The method of claim 1 , wherein the access to the first field comprises:
a read access to a value of the first field; or
an assignment to the value of the first field.

3. The method of claim 2 , wherein the step of determining if effective dating is to be applied to the field further comprises:
determining whether the first object contains a field that is to be effective dated.

4. The method of claim 3 , further comprising:
the step of identifying the access to the first field comprises a pointcut identifying a join point, wherein the join point is a read access to a value of the first field or an assignment to the value of the first field.

5. The method of claim 1 , wherein the step of redirecting the access to the second object further comprises:
identifying the first field as a property or a collection;
responsive to identifying the first field as a property, redirecting the access to the second object according to a first map lookup of the first field in first map; and
responsive to identifying the first field as a collection, redirecting the access to the second object according to a second map lookup of the first field in a second map.

6. The method of claim 5 , wherein a field name for the first field defines a lookup key for redirecting the access to the second object according to at least one of the first map lookup and the second map lookup.

7. The method of claim 1 , wherein the step of accessing the effective dated value in a second field of the second object according to an access context further comprises:
identifying the effective dated value in an ordered collection of values for the second field according to the access context.

8. The method of claim 7 , wherein the step of accessing the effective dated value in a second field of the second object according to an access context further comprises:
establishing a date range over which the effective dated value is identified in the ordered collection.

9. A computer system comprising:
a processor; and
an effective dater in communication with the processor, wherein the effective dater: identifies a join point in a byte stream that indicates an access to a first field of a first object during runtime of a program, wherein the first object is not effective date enabled to simultaneously store different values for the first field that are in effect over different date ranges; identifies a pointcut expression that matches the join point; determines if the pointcut expression indicates that effective dating is to be applied to the first field; responsive to determining that the pointcut expression indicates that effective dating is to be applied to the first field, integrates instructions into the byte stream that redirect the access to a second object, wherein the second object is effective date enabled to simultaneously store different values that are in effect for a second field over different date ranges; and accesses an effective dated value in the second field of the second object according to an access context that indicates a date range for the effective dated value.

10. The computer system of claim 9 , wherein the access to the first field comprises:
a read access to a value of the first field; or
an assignment to the value of the first field.

11. The computer system of claim 10 , wherein the step of determining if effective dating is to be applied to the field further comprises:
determining, by the effective dater, whether the first object contains a field that is to be effective dated.

12. The computer system of claim 11 , wherein:
the effective dater identifying the access to the first field a pointcut identifying a join point, wherein the join point is a read access to a value of the first field or an assignment to the value of the first field.

13. The computer system of claim 9 , wherein the step of redirecting the access to the second object further comprises:
identifying, by the effective dater, the first field as a property or a collection;
responsive to identifying the first field as a property, redirecting, by the effective dater, the access to the second object according to a first map lookup of the first field in first map; and
responsive to identifying the first field as a collection, redirecting, by the effective dater, the access to the second object according to a second map lookup of the first field in a second map.

14. The computer system of claim 13 , wherein a field name for the first field defines a lookup key for redirecting the access to the second object according to at least one of the first map lookup and the second map lookup.

15. The computer system of claim 9 , wherein accessing the effective dated value in a second field of the second object according to an access context further comprises:
identifying, by the effective dater, the effective dated value in an ordered collection of values for the second field according to the access context.

16. The computer system of claim 15 , wherein accessing the effective dated value in a second field of the second object according to an access context further comprises:
establishing, by the effective dater, a date range over which the effective dated value is identified in the ordered collection.

17. A computer program product for providing effective dating to objects in a runtime environment, the computer program product comprising:
a computer readable storage media;
program code, stored on the computer readable storage media, for identifying a join point in a byte stream that indicates an access to a first field of a first object during runtime of a program, wherein the first object is not effective date enabled to simultaneously store different values for the first field that are in effect over different date ranges;
program code, stored on the computer readable storage media, for identifying a pointcut expression that matches the join point;
program code, stored on the computer readable storage media, for determining if the pointcut expression indicates that effective dating is to be applied to the first field;
program code, stored on the computer readable storage media, for integrating instructions into the byte stream that redirect the access to a second object in response to determining that the pointcut expression indicates that effective dating is to be applied to the first field, wherein the second object is effective date enabled simultaneously store different values that are in

Assignees

• Adp Llc

Inventors

• Cooper Thomas A

Classifications

• G06Q10/105

  Human resources · CPC title

• G06Q10/063

  Operations research, analysis or management · CPC title

• G06Q10/1091 Primary

  Recording time for administrative or management purposes · CPC title

• G06F16/219

  Managing data history or versioning (querying versioned data G06F16/2474; querying temporal data G06F16/2477) · CPC title

• G06F17/30598

  Physics · mapped topic