1. A method for processing classes comprising:
- obtaining duplicative information comprising one or more duplicated elements from one or more classes;
- obtaining one or more reduced classes by removing said one or more duplicated elements from said one or more classes;
- obtaining a multi-class file comprising said duplicative information and said reduced classes; and
- allocating a dynamic memory to receive said multi-class file, said multi-class file to be completely received into said dynamic memory.
2. The method of claim 1 wherein said multi-class file further comprises memory allocation information.
3. The method of claim 2 wherein said memory allocation information comprises a memory requirement for each of said one or more reduced classes.
4. The method of claim 3 wherein said memory allocation information comprises a total memory allocation requirement for loading said one or more reduced classes and said duplicative information.
5. The method of claim 4, further comprising:
- reading said total memory allocation requirement from said multi-class file, said allocating said dynamic memory to receive said multi-class file being based on said total memory allocation requirement; and
- loading said one or more reduced classes and said duplicative information into said dynamic memory.
6. The method of claim 1 wherein said duplicative information comprises a set of file constants.
7. The method of claim 6, wherein said step of obtaining duplicative information comprises obtaining one or more of said file constants shared between two or more of said classes.
8. The method of claim 1 further comprising obtaining a shared table comprising said duplicative information.
9. The method of claim 1 wherein said duplicative information is information regarding a file format of said one or more classes.
10. The method of claim 1 further comprising loading classes by loading said multi-class file.
11. A computer program product comprising:
- a computer usable medium having computer readable program code embodied therein for processing classes, said computer program product comprising:
- computer readable program code configured to cause a computer to obtain duplicative information comprising one or more duplicated elements from one or more classes;
- computer readable program code configured to cause a computer to obtain one or more reduced classes by removing said one or more duplicated elements from said one or more classes;
- computer readable program code configured to cause a computer to obtain a multi-class file comprising said duplicative information and said reduced classes; and
- computer readable program code configured to cause a computer to allocate a dynamic memory to receive said multi-class file, said multi-class file to be completely received into said dynamic memory.
12. The computer program product of claim 11 wherein said multi-class file further comprises memory allocation information.
13. The computer program product of claim 12 wherein said memory allocation information comprises a memory requirement for each of said one or more reduced classes.
14. The computer program product of claim 12 wherein said memory allocation information comprises a total memory allocation requirement for loading said one or more reduced classes and said duplicative information.
15. The computer program product of claim 14 further comprising:
- computer readable program code configured to cause a computer to read said total memory allocation requirement from said multi-class file, said computer readable program code configured to cause a computer to allocate said dynamic memory to receive said multi-class file being based on said total memory allocation requirement; and
- computer readable program code configured to cause a computer to load said one or more reduced classes and said duplicative information into said dynamic memory.
16. The computer program product of claim 11 wherein said duplicative information comprises a set of file constants.
17. The computer program product of claim 16 wherein said computer readable program code configured to obtain duplicative information comprises computer readable program code configured to cause a computer to obtain one or more of said file constants shared between two or more of said classes.
18. The computer program product of claim 11 further comprising computer readable program code configured to cause a computer to obtain a shared table comprising said duplicative information.
19. The computer program product of claim 11 wherein said duplicative information is information regarding a file format of said one or more classes.
20. The computer program product of claim 11 further comprising computer readable program code configured to cause a computer to load classes by loading said multi-class file.
21. A system comprising:
- a processor;
- a memory coupled to said processor;
- one or more classes stored in said memory;
- duplicative information that is duplicated across one or more of said classes;
- a process executing on said processor, said process configured to obtain one or more reduced classes by removing said duplicative information from said one or more classes;
- a multi-lass file comprised of said duplicative information and said one or more reduced classes, said multi-class file obtained by a process executing on said processor; and
- a process executing on said processor, said process configured to load said multi-class file completely into a dynamic memory.
22. The system of claim 21 wherein said multi-class file further comprises memory allocation information.
23. The system of claim 22 wherein said memory allocation information comprises a memory requirement for said one or more reduced classes.
24. The system of claim 22 wherein said memory allocation information comprises a total memory allocation requirement for said processor to execute said process configured to load said multi-class file into said dynamic memory.
25. The system of claim 24 further comprising:
- said processor configured to execute a process for reading said total memory allocation requirement from said multi-class file; and
- said processor configured to execute a process for allocating a portion of said dynamic memory based on said total memory allocation requirement.
26. The system of claim 21 wherein said duplicative information comprises a set of file constants.
27. The system of claim 26 wherein one or more of said file constants are shared between two or more of said classes.
28. The system of claim 21 further comprising a shared table comprising said duplicative information.
29. The system of claim 21 wherein said duplicative information comprises information regarding a file format of said one or more classes.
30. A method of pre-processing class files comprising:
- determining one or more duplicated elements in a plurality of class files;
- forming a shared table associated with said plurality of class files, said shared table comprising said one or more duplicated elements;
- removing said one or more duplicated elements from said plurality of class files;
- forming a multi-class file comprising said plurality of class files and said shared table; and
- allocating a dynamic memory to receive said multi-class file, said multi-class file to be completely received into said dynamic memory.
31. The method of claim 30, further comprising:
- computing an individual memory allocation requirement for each of said plurality of class files;
- computing a total memory allocation requirement for said plurality of class files from said individual memory allocation requirement for each of said plurality of class files; and
- storing said total memory allocation requirement in said multi-class file.
32. The method of claim 31, further comprising:
- reading said total memory allocation requirement from said multi-class file, said allocating said dynamic memory to receive said multi-class file being based on said total memory allocation requirement; and
- loading said plurality of class files and said shared table into said dynamic memory.
33. The method of claim 30, further comprising:
- accessing said shared table to obtain one or more elements not found in one or more of said plurality of class files.
34. The method of claim 30, wherein said step of determining one or more duplicated elements comprises:
- determining one or more constants shared between two or more class files.
35. The method of claim 34, wherein said step of forming a shared table comprises:
- forming a shared constant table comprising said one or more constants shared between said two or more class files.
36. A computer program product comprising:
- a computer usable medium having computer readable program code embodied therein for pre-processing class files, said computer program product comprising:
- computer readable program code configured to cause a computer to determine one or more duplicated elements in a plurality of class files;
- computer readable program code configured to cause a computer to form a shared table associated with said plurality of class files, said shared table comprising said plurality of duplicated elements;
- computer readable program code configured to cause a computer to remove said one or more duplicated elements from said plurality of class files;
- computer readable program code configured to cause a computer to form a multi-class file comprising said plurality of class files and said shared table; and
- computer readable program code configured to cause a computer to allocate a dynamic memory to receive said multi-class file, said multi-class file to be completely received into said dynamic memory.
37. The computer program product of claim 36, further comprising:
- computer readable program code configured to cause a computer to compute an individual memory allocation requirement for each of said plurality of class files;
- computer readable program code configured to cause a computer to compute a total memory allocation requirement for said plurality of class files from said individual memory allocation requirement for each of said plurality of class files; and
- computer readable program code configured to cause a computer to store said total memory allocation requirement in said multi-class file.
38. The computer program product of claim 37, further comprising:
- computer readable program code configured to cause a computer to read said total memory allocation requirement from said multi-class file, said allocating said dynamic memory to receive said multi-class file being based on said total memory allocation requirement; and
- computer readable program code configured to cause a computer to load said plurality of class files and said shared table into said dynamic memory.
39. The computer program product of claim 36, further comprising:
- computer readable program code configured to cause a computer to access said shared table to obtain one or more elements not found in one or more of said plurality of class files.
40. The computer program product of claim 36, wherein said computer readable program code configured to cause a computer to determine said one or more duplicated elements comprises:
- computer readable program code configured to cause a computer to determine one or more constants shared between two or more class files.
41. The computer program product of claim 40, wherein said computer readable program code configured to cause a computer to form said shared table comprises:
- computer readable program code configured to cause a computer to form a shared constant table comprising said one or more constants shared between said two or more class files.
42. A dynamic memory configured to store data for access by a computer system for processing class files, comprising:
- a data structure stored completely in said dynamic memory, said data structure comprising:
- a plurality of class files; and
- a shared table comprising one or more elements that are duplicated between two or more of said plurality of class files, said shared table configured to be accessed for said duplicated elements, wherein said duplicated elements are further removed from said plurality of class files.
43. The dynamic memory of claim 42, wherein said duplicated elements comprise constants and said shared table comprises a shared constant pool.
44. The dynamic memory of claim 42, further comprising a memory requirement value configured to be read by the computer system to allocate a runtime data area in a dynamic memory for loading said plurality of class files and said shared table.
45. The dynamic memory of claim 44, wherein said memory requirement value is computed from individual memory requirements of said plurality of class files and a memory requirement of said shared table.
