KR100261281B1 - Development method and system of java application services using declarative method of mheg-5 - Google Patents

Abstract

PURPOSE: A method and a system for developing a JAVA application service using a disjunctive method of an MHEG-5(Multimedia and Hypermedia Information coding Expert Group Part5) is provided to develop and use a JAVA based multimedia/hypermedia MHEG-5 service object by using a disjunctive method. CONSTITUTION: An object is formed and stored by converting an application scenario of a disjunctive notation to an MHEG-5 text notation. The class service object of the MHEG-5 text notation is converted to JAVA codes in order to process the class object as data type. An object loader and an analysis process are performed by processing the JAVA class service object.

Description

Development method and system of J-AV application service using declarative technique of M-HE-5

The present invention relates to a JAVA application service development method and system using a declarative technique of MHEG-5, and in particular, to facilitate service development in a JAVA environment, a JAVA-based multimedia / hyper using a declarative technique of MHEG-5. By describing how to configure the media service processing system, we will provide an easy multimedia service in the current Internet JAVA environment.

The present invention provides a technology for minimizing the service management burden in a client system and easily developing and distributing Internet application services by defining multimedia / hypermedia services in the form of standardized data rather than programs for the development of next generation Internet application services. This is a new service development strategy field using networks such as internet and high speed communication network.

Up to now, JAVA language has been developed as a programming language technique for developing such services. However, in order to develop services with JAVA, the burden of developing an application service depends on a specific language and its education and skill acquisition are very difficult. It is difficult and if the language is changed, user retraining is required.

There is an authoring system for automatically generating MHEG-5 objects defined in ISO 13522-5 MHEG-5 (Multimedia and Hypermedia information coding Expert Group: part5), an information representation technique for developing multimedia and hypermedia applications worldwide. Since developing ASN.1 MHEG-5 objects requires a lot of time and effort, debugging is also very difficult. Therefore, even if the MHEG-5 engine conforming to ISO 13522-5 is implemented and commercialized, it is difficult to create an application service composed of ASN.1 type MHEG-5 objects, which makes it difficult to spread the MHEG-5 standard technology and Also, there are limitations in developing various multimedia / hypermedia application services. In addition, even when developing multimedia application services using JAVA, which is now established as an internet language, there is a problem that a developer cannot easily develop a service because a developer needs to acquire knowledge of a new programming language and a lot of technical skills.

Therefore, the present invention provides an MHEG-5 object that automatically creates, converts and processes MHEG-5 objects so that application service developers can easily develop and use "JAVA-based multimedia / hypermedia MHEG-5 service" objects with declarative methods rather than programming methods. Its purpose is to provide JAVA application service development method and system using declarative technique of -5.

1 is an overall structure and flowchart of a multimedia / hypermedia JAVA application service development system (JMOBIL) using a declarative technique.

2 is a structure diagram of a JAVA application service object authoring tool in the form of MHEG-5 text notation.

3 is a translator structure diagram for automatic conversion of JAVA application objects in MHEG-5 text notation form into JAVA code.

4 is a structure diagram of an interpreter for processing JAVA application objects in the form of data.

5 is a flow chart of object creation and conversion in a server.

6 is a flowchart illustrating a service object processing after downloading the JMOBIL-Engine in the form of an applet from a client through a web browser.

* Description of the symbols for the main parts of the drawings *

10: JMOBIL-auth Author 11: Jmobil-t2auth

12: Jmobil-auth2t 13: Expression Module

14: handler 20: Jmobil-t2java

21: lexer 22: parser

23: Code Generator 30: JMOBIL-Engine Interpreter

31: class loader 32: expression module

33: interpreter

The JAVA application service development system using the declarative technique of MHEG-5 according to the present invention for achieving the above object is a declarative notation for the application scenario desired by the user through a table-type user interface that is a visual form corresponding to the MHEG-5 standard class. Authoring means for generating and storing the object in the form of MHEG-5 text notation; Translation means for automatically converting a service object in a text notation form developed by the authoring means into JAVA code for processing in JAVA into a data form instead of a program form; The JAVA class service object created in the data form of the declarative notation is processed by a sequential analysis technique, characterized in that it comprises an analysis means for processing the screen playback and the user's interaction with the user.

In addition, in the JAVA application service development method using the declarative technique of MHEG-5 according to the present invention, when a user-desired application scenario is created in a declarative notation form through a table-type user interface corresponding to the MHEG-5 standard class, MHEG An object creation step of creating and storing an object in -5 text notation; An object conversion step of automatically converting a class service object in a text notation form developed by the authoring means into JAVA code for processing in JAVA into a data form instead of a program form; A JAVA class service object created in the data form of the declarative notation is processed by a sequential analysis technique to perform an object loader and an analysis step for processing a screen playback and a user's interaction with a user.

Hereinafter, with reference to the accompanying drawings will be described in detail the contents of the present invention.

FIG. 1 illustrates the overall configuration and overall flow diagram of a multimedia / hypermedia JAVA application service development system (JMOBIL) using a declarative technique. As shown, JMOBIL is an authoring tool JMOBIL-Auth (10) for creating MHEG-5 text notation type objects, and a translator JMOBIL-text2java that automatically converts JAVA service objects into JAVA code for processing as data rather than program types. (20) and JMOBIL-Engine (30), which is an interpreter that outputs multimedia objects on the screen and manages the user's dialogue through the sequential analysis of JAVA service objects in the form of data.

When the application scenario desired by the user is created in a declarative notation form through a table-type user interface which is a defined visual type corresponding to the MHEG-5 standard class, the JMOBIL-Auth authoring tool 10 creates an object in MHEG-5 text notation. Stores and retrieves or modifies MHEG-5 text notation objects.

The text notation type service object developed by the JMOBIL-Auth authoring tool 10 is converted into JAVA code by the JMOBIL-text2java translator 20 to process the data in a data form instead of a program form. And unlike general JAVA application processing method, JAVA class service object created in data form of declarative notation is processed by sequential analysis method by JMOBIL-Engine interpreter to process screen playback and user interaction with user.

2 describes a configuration of an authoring tool for generating a multimedia / hypermedia object in a visual environment. Jmobil-t2auth (11) and Jmobil-auth2t module (12) for saving and restoring in the form of MHEG-5 text notation, which is the final object storage form, and the presentation module (13) for reproducing MHEG-5 objects to users on a graphic screen. And a processor 14 for controlling information transfer, management and modules between these modules.

3 illustrates a configuration of a translator 20 for automatically generating a service object in a text notation form generated using an authoring tool as JAVA code. Translator Binds values to a lexer (21) for root analysis on text notation, a common construct, a parser (22) for syntax checking on text notation, and finally a data structure for JMOBIL-Engine to process. It consists of a code generator 23 that automatically converts to JAVA code for.

Figure 4 downloads the object generated by the translator 20 with a JAVA compiler to the client to analyze the JAVA object according to each MHEG-5 declarative structure sequentially to play the multimedia screen to the user and dialogue with the user It describes the configuration of the JMOBIL-Engine (30) that is an interpreter that supports the. The class loader 31 which is responsible for initializing the object which has downloaded and received the JAVA object class on the network, the expression module 32 which outputs and manages the MHEG-5 object related to screen reproduction on the screen, and the MHEG initialized object. -5 consists of interpreters 33 which interpret and process according to the semantics described in the standard.

5 is a flowchart illustrating development of a multimedia service object in a server in a client-server relationship. First, an object having a text notation form is created through a new and modified operation in a visual environment using the authoring tool 10 (100), and then automatically translated into a JAVA code service object through a translator 20 and generated (200). . In order for all JAVA codes to operate on various platforms without modification, they are converted and registered as a service using a JAVA compiler for conversion to JAVA classes in the form of byte codes (300).

6 is an easy multimedia object processing flowchart supported by JMOBIL in a client. JMOBIL operating environment requires Java Development Kit (JDK) 1.1.x and has the following difference from general JAVA application processing technique. General JAVA application is run as program through JAVA virtual machine without special interpreter, whereas JAVA application processing method in JMOBIL processes JAVA application service object as data type and processes service object through engine interpreter. Therefore, the developer does not require any knowledge of JAVA code when developing service application, and there is an advantage that the service application can be easily developed and managed by defining general multimedia object property values according to the declarative technique of MHEG-5. In addition, because the JAVA object that transforms the service application scenario into the data structure of the pre-processing stage through the translator rather than directly processing the object in the form of text, the lexical, syntax analysis, and code generation required for the text processing technique are required. The unnecessary parts can be used to improve performance. The entire flow of the JMOBIL-Engine is that the client downloads the engine as an applet from the web browser (310) and then the web browser passes the initial service address to the engine (320). The engine downloads the service object corresponding to the address (330), interprets the received object sequentially according to the semantics described in the MHEG-5 standard (350), outputs data on the screen (360), and then selects and moves the user. Invoke related event handlers based on events such as: If the generated event is the selection of a new service object, the process of downloading and processing the service object is repeated until the service is terminated by the user (370, 340).

In the JAVA-based multimedia / hypermedia service processing system using the declarative technique of MHEG-5 according to the present invention, prior knowledge of a specific object development language (JAVA or MHEG-5 text notation) is not required, and MHEG-5 authoring is performed in a visual environment. The tool makes it easy to create multimedia / hypermedia JAVA application service objects. Once created, the object can be operated on various platforms supporting JAVA through the conversion process from MHEG-5 text notation to pure JAVA environment through automatic translator to JAVA. Finally, the converted JAVA type service object is interpreted and processed by JMOBIL-Engine without any additional vocabulary and parsing at the client, thus improving the execution speed.

Claims (3)

Authoring means for creating and storing an object in MHEG-5 text notation when an application scenario desired by a user is created in a declarative notation form through a table-type user interface corresponding to the MHEG-5 standard class; Translation means for automatically converting a service object in a text notation form developed by the authoring means into JAVA code for processing in JAVA into a data form instead of a program form; JAVA application service using the declarative technique of MHEG-5, characterized in that the JAVA class service object created in the data form of the declarative notation is processed by the sequential analysis technique to interpret the screen playback and the user's interaction to the user Development system. An object creation step of creating and storing an object in MHEG-5 text notation when an application scenario desired by a user is created in a declarative notation form through a table type user interface corresponding to MHEG-5 standard class; An object conversion step of automatically converting a class service object in a text notation form developed by the authoring means into JAVA code for processing in JAVA into a data form instead of a program form; Declarative technique of MHEG-5 characterized in that the JAVA class service object created in the data form of the declarative notation is processed by the sequential analysis technique to perform an object loader and an interpreting step to process the screen playback and user interaction with the user. JAVA application service development method using. The method of claim 2, The object loader and analysis step, The client downloading and running the engine in the form of an applet in a web browser; Delivering, by the web browser, the initial service address to the engine; Downloading, by the engine, a service object corresponding to the address; The engine sequentially interpreting JAVA service objects in data form according to semantics described in the MHEG-5 standard; The engine outputting data on a client screen and managing user conversations; MHEG, if the event generated by calling the relevant event handler according to the user's selection, movement, etc. is the selection of a new service object, repeating the process of downloading and processing the service object until the user terminates the service. JAVA application service development method using declarative technique of -5.

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