Method and system to automatically generate software code

• US 8,429,598 B2
• Filed: 10/22/2007
• Issued: 04/23/2013
• Est. Priority Date: 12/08/2003
• Status: Active Grant

• Current Assignee: PayPal, Inc. (PayPal Holdings, Inc.)
• Original Assignee: eBay Inc.
• Inventors: Seitz, Greg, Kasten, Christopher J.
• Primary Examiner(s): Bullock, Jr., Lewis A
• Assistant Examiner(s): Dang, Christine
• Application Number:
  US11/975,886
• Publication Number:
  US 20080059950A1
• Time in Patent Office: 2,010 Days
• Field of Search: None
• US Class Current: 717/108
• CPC Class Codes: G06F 12/0808 with cache invalidating means G06F12/0815 takes precedence
• CPC Class Codes: G06F 12/0875 with dedicated cache, e.g. instruction or stack
• CPC Class Codes: G06F 12/12 Replacement control
• CPC Class Codes: G06F 12/128 adapted to multidimensional cache systems, e.g. set-associative, multicache, multiset or multilevel
• CPC Class Codes: G06F 16/2272 Management thereof
• CPC Class Codes: G06F 16/2455 Query execution
• CPC Class Codes: G06F 16/24552 Database cache management
• CPC Class Codes: G06F 16/2471 Distributed queries
• CPC Class Codes: G06F 16/40 of multimedia data, e.g. slideshows comprising image and additional audio data retrieval of still image data G06F16/50; retrieval of audio data G06F16/60; retrieval of video data G06F16/70
• CPC Class Codes: G06F 2212/452 Instruction code
• CPC Class Codes: G06F 2212/465 Structured object, e.g. database record
• CPC Class Codes: G06F 9/5016 the resource being the memory
• CPC Class Codes: G06F 9/54 Interprogram communication
• CPC Class Codes: Y10S 707/99933 Query processing, i.e. searching
• CPC Class Codes: Y10S 707/99944 Object-oriented database structure

Abstract

According to a first aspect there is provided a system to automatically generate software for an object to relational mapping system. The system reads class information respectively associated with a plurality of classes. The system reads meta-data based on the class information. In addition the system automatically generates the plurality of classes based on the meta-data. The plurality of classes to be used in the object to relational mapping system to enable an application program to access data that is persistently stored in a database and accessed by the application program from an instance of a data object class that is included in the plurality of classes. The plurality of classes further includes a first class that is utilized to create the instance of the data object class.

Claims

1. A method to automatically generate software for an object to relational mapping system, the method including:

reading class information respectively associated with each class of a plurality of classes;

reading meta-data based on the class information; and

automatically generating the plurality of classes based on the meta-data, the plurality of classes including a first class, a second class and a third class, the plurality of classes being used in the object to relational mapping system to enable

an application program to access data that is persistently stored in a database and accessed by the application program from an instance of the first class, the first class being a data object class, the second class being utilized to create the instance of the data object class, the third class defining a plurality of read sets that respectively define a plurality of columns that are requested from the database by an instance of the third class and populated by the instance of the third class to the instance of the data object class.

2. The method of claim 1, wherein the second class is a data object access class that is utilized to create an instance of a data access object that is utilized to create the instance of the data object class.

3. The method of claim 1, wherein the third class further defines at least one of a plurality of update sets and insert sets that determine attributes that are persisted by the third class to the database from the data object class.

4. The method of claim 1, wherein the third class defines hints.

5. The method of claim 1, wherein the plurality of classes includes at least one class that includes meta-data to access a subobject.

6. The method of claim 1, wherein the plurality of classes includes at least one class that supports hierarchical relationships between data object types.

7. The method of claim 1, wherein the plurality of classes includes a fourth class to automatically retrieve data, in a single request, from the database to construct at least one data object in an object graph.

8. The method of claim 1, wherein the plurality of classes includes at least one class to perform at least one of an update operation, an insert operation, or a delete operation for a plurality of data Objects in an object graph in a single database request.

9. A system to automatically generate software for an object to relational mapping system, the system including:

at least one machine including;

a read module executable by the machine to read class information respectively associated with a plurality of classes, the read module to read meta-data based on the class information; and

a class generator module executable by the machine to automatically generate the plurality of classes based on the meta-data, the plurality of classes includes a first class, a second class and a third class, the plurality of classes to be used in the object to relational mapping system to enable an application program to access data that is persistently stored in a database and accessed by the application program from an instance of the first class, the first class is a data object class that is included in the plurality of classes,

the second class is utilized to create the instance of the data object class, the third class defines a plurality of read sets that each determine a plurality of columns that are requested by an instance of the third class from the database and populated by the instance of the third class to the instance of the data object class.

10. The system of claim 9, wherein the second class is a data object access class that is utilized to create an instance of a data access object that is utilized to create the instance of the data object class.

11. The system of claim 9, wherein the third class that defines at least one of a plurality of update sets and insert sets that determine attributes that are persisted by the third class to the database from the data object class.

12. The system of claim 9, wherein the third class defines hints.

13. The system of claim 9, wherein the plurality of classes includes at least one class that includes meta-data to access a subobject.

14. The system of claim 9, wherein the plurality of classes includes at least one class that supports hierarchical relationships between data object types.

15. The system of claim 9, wherein the plurality of classes includes a fourth class to automatically retrieve data, in a single request, from the database to construct at least one data object in an object graph.

16. The system of claim 9, wherein the plurality of classes includes at least one class to perform at least one operation from a group of operations including an update operation, an insert operation, a delete operation for at least one data object in an object graph in a single database request.

17. A non-transitory machine readable medium storing a set of instructions that, when executed by a machine, cause the machine to:

read class information respectively associated with each class of a plurality of classes;

read meta-data based on the class information; and

automatically generate the plurality of classes based on the meta-data, the plurality of classes includes a first class, a second class and a third class, the plurality of classes to be used in the object to relational mapping system to enable an application program to access data that is persistently stored in a database and accessed by the application program from an instance of the first class, the first class is a data object class,

the second class is utilized to create the instance of the data object class,

the third class defines a plurality of read sets that each determine a plurality of columns that are requested by an instance of the third class from the database and populated by the instance of the third class to the instance of the data object class.

18. A system to automatically generate software for an object to relational mapping system, the system including:

a first means for reading class information respectively associated with a plurality of classes, the plurality of classes includes a first class, a second class and a third class, the first means for reading meta-data based on the class information; and

a second means for automatically generating the plurality of classes based on the meta-data, the plurality of classes to be used in the object to relational mapping system to enable an application program to access data that is persistently stored in a database and accessed by the application program from an instance of the first class, the first class is a data object class, the second class is utilized to create the instance of the data object class, the third class defines a plurality of read sets that each determine a plurality of columns that are requested by an instance of the third class from the database and populated by the instance of the third class to the instance of the data object class.