Initializing virtual machine that subsequently executes application

• US 20040236715A1
• Filed: 07/08/2004
• Published: 11/25/2004
• Est. Priority Date: 06/11/2001
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Krebs, Andreas
• Granted Patent: US 7,568,196 B2
• Time in Patent Office: Days
• US Class Current: 707/1
• CPC Class Codes: G06F 9/445 Program loading or initiating bootstrapping G06F9/4401; security arrangements for program loading or initiating G06F21/57
• CPC Class Codes: G06F 9/454 Multi-language systems; Localisation; Internationalisation

Abstract

A method and a system for selecting a desired language for text displays in a Java-Type language is provided. A localization class in the loadable Java program defines the text portions of the displays. At start of the application (200), the Java virtual machine (150) loads this class and a determination is made, by user input or otherwise, of which of a group of languages available should be used for the text. Based on the determination, the static initializer Java-type code is invoked, and it loads (13) the appropriate language text from a markup language document, preferably an XML document. The appropriate text segments from the markup language document are then used to initialize the variables (17). The application then can proceed to run as usual (25). Preferably, after the static initialization, the fields of the localization class are checked to confirm that all fields contain text.

Claims

1. A computer program product comprising instructions for causing a processor of a computer to initialize a virtual machine (VM) that subsequently executes an application to render an object on a display of the computer,

the computer program product causing to initialize the VM by the following steps:

providing a class that includes a variable, the variable being part of the application;

selecting a property value that determines to selectively render the object from a first object set or from a second object set;

reading an object representation for the variable from a markup language document in dependence on the property value from a first representation set or from a second representation set; and

assigning the object representation to the variable in the class.

2. The computer program product of claim 1, wherein the instructions cause the processor to treat the object representation as a pointer to a file.

3. The computer program product of claim 1, wherein the instructions cause the processor to assign a copy of the representation.

4. The computer program product of claim 1, wherein the instructions cause the processor to receive the markup language document via the Internet.

5. The computer program product of claim 1, wherein the instructions cause the processor to perform the reading step by identifying a plurality of variables from the byte-code of the application and reading representations for at least some of the variables from the markup language document.

6. The computer program product of claim 1, wherein providing a class that has a variable further comprises identifying the further variable that has already been and wherein reading to further comprises reading a representation for the further variable from the markup language document.

7. The computer program product of claim 1, wherein in the event that the markup language document has changed, the instructions cause the processor to re-initialize the virtual machine by the following:

identifying a further representation of the object from the modified markup language document depending on the property value;

identifying the corresponding variable for that further representation by parsing the application; and

re-initializing the variable based on the further representation of the object.

8. The computer program product of claim 7, wherein the instructions cause the processor to perform re-initialization while the virtual machine executes the application.

9. A method to initialize a virtual machine (VM) that subsequently executes an application render an object on a display of a computer, the method comprising:

providing a class that includes a variable, the variable being part of the application;

selecting a property value that determines to selectively render the object from a first object set or from a second object set;

reading an object representation for the variable from a markup language document in dependence on the property value from a first representation set or from a second representation set; and

assigning the object representation to the variable in the class.

10. The method of claim 9, wherein reading, a further comprises identifying a plurality of variables from the byte-code of the application, and subsequently reading representations for at least some of the variables from the markup language document.

11. The method of claim 9, wherein providing further includes identifying a further variable that has already been initiated, and wherein reading further comprises reading a representation for the further variable from the markup language document.

12. The method of claim 9, further comprising re-initializing, in the event that the markup language document has changed, the virtual machine by:

identifying a further representation of the object form the modified markup language document depending on the property value;

identifying the corresponding variable for that further representation by parsing the application; and

re-initializing the variable according to the property value by the object representation object that was identified.

13. A computer system that initializes a virtual machine (VM), for subsequently executing an application that renders an object on a display of a computer, the computer system comprising:

a class provider for providing a class that includes a variable, the variable being part of the application;

a property value selector as a means for selecting a property value that determines to selectively render the object from a first object set or from a second object set; and

a reader for reading an object representation for the variable from a markup language document in dependence on the property value from a first representation set or from a second representation set and for assigning the object representation to the variable in the class.

14. The computer system of claim 13, wherein the reader identifies a plurality of variables from the byte-code of the application and subsequently reads representations for at least some of the variables from the markup language document.

15. The computer system of claim 13, wherein the class provider identifies a further variable that has already been initiated, and wherein the reader reads a representation for the further variable from the markup language document.

16. The computer system of claim 13 that re-initializes the virtual machine in the event that the markup language document has changed, the computer system further comprising:

means for identifying a further representation of the object from the modified markup language document depending on the property value;

means for identifying the corresponding variable for that further representation by parsing the application; and

means for re-initializing the variable according to the property value for the object representation object that was identified.