KR100426315B1 - Analysis method and apparatus for extraction of ejb component from servlet program - Google Patents

Abstract

The present invention relates to an analysis apparatus for extracting an EJB component from a servlet program and a method thereof. The disclosed analysis apparatus includes a structural knowledge information DB constructed based on the structure of a servlet program, and a servlet program using the structural knowledge information DB. Structure information processor that analyzes structure and stores in analysis information DB, extracts business logic from Java code of servlet program, and extracts SQL and HTML analysis information from SQL statement and HTML tag to analyze business logic information and EJB template information It includes a multi-language handler that is stored in the library, analyzes the SQL language included in the servlet, provides information for component extraction using DB, provides API (Application Program Interface) library useful for component extraction, and analyzes HTML language. In the user interface included in the servlet There is an advantage to analyze the information.

Description

ANALYSIS METHOD AND APPARATUS FOR EXTRACTION OF EJB COMPONENT FROM SERVLET PROGRAM}

The present invention relates to a technique for extracting components from a servlet program, and more particularly, to an apparatus and method for analyzing a servlet program required to extract EJB components from a servlet, which is one of web programming languages used in a web-based application. .

The field of servlet program analysis is largely in the field of legacy system modernization, which replaces legacy programs with those needed for new systems.

The need for modernization of legacy systems is due to changes in the environment of the system or changes in the production techniques of the software to improve the productivity of the software. Especially in today's rapidly changing field of IT, legacy systems need to be modernized.

Legacy system modernization methods include redevelopment, transformation, and wrapping.

The redevelopment method is a method of newly developing a system that functions as an existing system from the beginning. This is quite inefficient because no reuse is done in software engineering, and existing systems only serve as a reference when developing new systems.

The conversion method is a method of modernizing by re-abstracting an existing program to a software system of a new system and replacing it with a new program, which may ultimately be most efficient but may cause stability problems.

The wrapping method allows the existing program to be used in a new system environment while allowing the existing program to run stably in a new environment, but it is not desirable in terms of software development.

Among the legacy system modernization methods as described above, the present invention belongs to the existing system analysis techniques required when using the transformation method. In order to convert, it is necessary to re-abstract the existing program, which requires an analysis of the existing program.

Looking at the prior art compared with the present invention.

Korean Patent Application No. 1998-047477 discloses an analysis method for converting a procedure-oriented program into an object-oriented program.

The invention of the hoho, parsing the raw procedural-oriented program code, converts it into an intermediate language format, stores it, extracts an object using the same, and provides information necessary for visualizing a program or generating an object-oriented program code in a library form.

However, such a prior patent has a problem in that it is suitable as a method for analyzing a procedure-oriented program, but cannot be used when the code is flexible and multiple languages are included in the code, such as a web program.

Transactions of the Korea Information Processing Society Spring Conference 8, Volume. 989-992 discloses "Servlet EJB Conversion Scheme."

The disclosed prior paper is a method of converting a servlet analysis by mapping a servlet analysis to a human domain analysis and modeling a system capable of performing such a function.

However, such a previous paper has a problem that productivity cannot be applied because common analysis techniques cannot be applied to different domains and system modeling and mapping are not automated.

The present invention has been proposed to solve such a conventional problem, and the object of the present invention is to provide an analysis information required in the process of automatically generating an EJB component by extracting a reusable component candidate from a servlet program source. To provide an analysis device for EJB component extraction.

Another object of the present invention is to provide information on component extraction, generation, and static analysis of existing programs by analyzing business logic required for component extraction and applying different analysis methods according to the servlet type. The purpose is to provide an analysis method for extracting EJB components from a program.

In an aspect of the present invention for realizing the above object, an analysis apparatus for extracting an EJB component from a servlet program includes a structure knowledge information DB constructed based on a structure of a servlet program, and the servlet using the structure knowledge information DB. A structure information processor that analyzes the structure of the program and stores it in the analysis information DB, extracts business logic from Java code of the servlet program, and extracts SQL and HTML analysis information from SQL statements and HTML tags to obtain business logic information and EJB template information. It includes a multi-language processor for storing in the analysis information DB.

According to another aspect of the present invention, an analysis method for extracting an EJB component from a servlet program includes a first step of receiving a servlet program, parsing the structural information of the servlet program, and identifying the parsed result according to the servlet type; A second step of extracting different business logic according to the servlet type, a third step of analyzing an SQL statement if there is an SQL statement in the servlet program, and an HTML tag included in the servlet program And analyzing the user interface to analyze the user interface information.

1 is an overall configuration diagram of a system for generating an EJB component in a servlet program according to the present invention;

Figure 2 is a detailed configuration of the servlet code analyzer shown in Figure 1 and an additional configuration of the system,

3 is a detailed configuration diagram of a servlet program analyzer to which the servlet program analysis method according to the present invention is applied;

4 is a flowchart illustrating an overall process of analyzing a servlet program according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: servlet code 101, 202: servlet code analyzer

102, 206: Analysis information DB 103: Servlet information visualizer

104: EJB component extractor 105: EJB component generator

106: EJB code 201, 300: servlet program

203, 302: structure knowledge information DB 301: structure information parser

303: multi-language parser 304: servlet type identifier

308: Business Logic Extractor 309: SQL Statement Analyzer

310: UI Extractor

There may be a plurality of embodiments of the present invention. Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings. This embodiment allows for a better understanding of the objects, features and advantages of the present invention.

Referring to the technical gist of the present invention, after constructing the structure knowledge information DB based on the general structure of the servlet program, the structure information of the received servlet program is analyzed with reference thereto. The servlet type is identified according to the structure of the analyzed servlet program, and different business logic extraction steps are performed for each identified type.After extracting business logic, components are extracted through SQL and HTML analyzers according to the existence of SQL statements and HTML. And provides information by analyzing the information required for generation.

1 is an overall configuration diagram of a system for generating an EJB component in a servlet program, and is an overall system to which a servlet program analysis method according to the present invention is applied.

The servlet code analyzer 101 receives the servlet code 100 and analyzes the information required by the servlet information viewer 103, the EJB component extractor 104, and the EJB component generator 105, and analyzes the information required by the servlet code 100. 102).

The servlet information visual device 103 provides information about the structure of the servlet through static analysis of the received servlet code.

The EJB component extractor 104 extracts an EJB component using the analyzed business logic and SQL information.

The EJB component generator 105 generates the EJB code 106 according to the extracted EJB components in accordance with the EJB component specification.

2 is a block diagram showing the detailed configuration of the servlet code analyzer and how to provide analyzed information to other tools. In FIG. 1, the servlet code analyzer 202 is identical to the servlet code analyzer 101, and the analysis information DB 206 is identical to the analysis information DB 102 of FIG. 1.

The structure information processor 204 of the servlet code analyzer 202 analyzes the structure of the received servlet program 201 using the structure knowledge information DB 203, and then analyzes the structure information of the servlet code analyzer 207 using the structure knowledge information DB 203. Provide. In addition, the type of the servlet is determined based on the analyzed structure information, and the multi-language processor 205 takes charge of actual code parsing.

The multi-language processor 205 of the servlet code analyzer 202 extracts business logic from Java code, and extracts SQL and HTML analysis information from SQL statements and HTML tags and stores them in the analysis information DB 206.

The structural information among the information stored in the analysis information DB 206 is provided to the servlet information visual device 103 by the visual aid support library generator 207.

Business logic information is provided to the EJB component extractor 104 by the extractor support library generator 208.

EJB template information is provided to the EJB component generator 105 by the generator support library generator 209.

3 is a detailed structural diagram of a servlet program analyzer to which the servlet program analysis method according to the present invention is applied. In FIG. 3, the servlet program 300 is the same component as the servlet program 201 of FIG. 2, and the structure knowledge information DB of 302 in FIG. 3 is the structure knowledge information DB of 203 shown in FIG. 2. Same component as.

The structure information processor 204 is a structure information parser 301 for parsing the structure of the servlet program using the structure knowledge information DB 302, and a servlet type identifier 304 for identifying the type of the servlet using the information obtained therefrom. )

The multi-language processor 205 includes a multi-language parser 303 for parsing multiple languages, a business logic extractor 308 for analyzing the necessary information from the parsed results, an SQL statement analyzer 309, and a user interface. A UI) extractor 310. The multi-language parser 303 includes a Java parser 305 for parsing Java code, an SQL parser 306 for parsing SQL statements, and an HTML parser 307 for parsing HTML tags.

The information parsed from the Java parser 305 is extracted by the business logic extractor 308 and stored in the business logic information DB 311, and the SQL-related information analyzed by the SQL statement analyzer 309 is SQL information. The UI related information stored in the DB 312 and obtained by the UI extractor 310 is stored in the UI information DB 313.

4 is a flowchart illustrating an overall process of analyzing a servlet program according to the present invention.

First, after receiving a servlet program, the structure information of the servlet program is parsed, and the parsed result is identified according to the servlet type (S401 to S403).

If the identified servlet program is type 1, it is a servlet having a recursive call structure, and in order to extract business logic, doGet () of the servlet is analyzed intensively (S404 to S405).

If the identified servlet program is type 2, it is an external class call structure, and the doPost () of the servlet and the used external Java class are analyzed (S406 to S407).

If the identified servlet program is type 3, doGet () is called to doPost (), and the analysis of Java and script languages is performed together with a mixture of JavaScripts (S408 to S409).

After the business logic extraction process is completed according to the types as described above, if there is an SQL statement according to the existence of the SQL statement included in the servlet program, the SQL statement is analyzed. SQL statement analysis types are Select, Insert, Update, Delete, etc. according to the type of query statement. You can get information about DB tables through query statements and use EJB Can be used as information for extracting the entity bean (S410 ~ S411).

If the processing of the SQL statement is finished or the SQL statement is not included in the servlet, the analysis of the servlet program is completed by analyzing the HTML tag. By analyzing the tag of the HTML, it analyzes the branch of the screen or the structure of the screen framework, the path to the included image file, the information on the linked file, the information on the basic HTML components (S412).

In the above description, but limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be included in the technical spirit described in the claims of the present invention.

The present invention as described above has the following effects.

First, it provides static analysis to make it easier to understand existing servlet code.

Second, despite the flexibility of servlet programs, you can easily analyze business logic in various servlet code.

Third, it provides API (Application Program Interface) library which is useful for component extraction by analyzing information of SQL language included in servlet and providing information for component extraction using DB.

Fourth, by analyzing the HTML language it is possible to analyze the information on the user interface (User Interface) included in the servlet.

Claims (10)

In the analysis device for extracting a module available as an EJB component in the servlet program, A structural knowledge information DB constructed based on the structure of the servlet program; A structure information processor for analyzing the structure of the servlet program using the structure knowledge information DB and storing the structure information in the analysis information DB; EJB in a servlet program including a multi-language processor that extracts business logic from Java code of the servlet program and extracts SQL and HTML analysis information from SQL statements and HTML tags and stores business logic information and EJB template information in the analysis information DB. Analysis device for component extraction. The method of claim 1, A visual aid support library generator for providing structure information among the information stored in the analysis information DB as a servlet information visual viewer, an extractor support library generator for providing business logic information among the information stored in the analysis information DB to an EJB component extractor, and the analysis Information analysis device for extracting EJB component from servlet program including generator support library generator which provides EJB template information to EJB component generator among information stored in DB. The structure information processor of claim 1, wherein And a structure information parser for parsing the structure of the servlet program using the structure knowledge information DB, and a servlet type identifier for identifying the type of the servlet using the parsing information. The system of claim 1, wherein the multilingual processor is A multi-language parser for parsing multiple languages, a business logic extractor for analyzing necessary information from the parsed results, an SQL statement analyzer for analyzing an SQL statement if there is an SQL statement based on the presence or absence of an SQL statement from the parsed results, Analysis apparatus for EJB component extraction in the servlet program including a UI extractor for extracting UI information from the parsed result. 5. The system of claim 4, wherein the multilingual parser An analysis device for extracting EJB components from a servlet program including a Java parser that parses Java code, an SQL parser that parses SQL statements, and an HTML parser that parses HTML tags. In the analysis method for extracting a module usable as an EJB component from a servlet program, A first step of receiving the servlet program and parsing structure information of the servlet program and identifying the parsed result according to the servlet type; Extracting different business logic according to the identified servlet type; A third step of analyzing the SQL statement if there is an SQL statement according to the existence of the SQL statement included in the servlet program; And a fourth step of analyzing user interface information by analyzing HTML tags included in the servlet program. The method of claim 6, wherein the servlet structure knowledge information An analysis method for extracting EJB components from a servlet program that includes information on whether doGet (), doPost (), Javascript, and other Java class calls are made. The method of claim 7, wherein the servlet type is According to the business logic, the type that has recursive call in doGet (), the type that executes business logic by calling Java class in doPost (), doGet (), doPost () call each other and use Javascript An analysis method for extracting EJB components from a servlet program comprising a type that executes logic. The method of claim 6, wherein the SQL statement analysis type It includes selection, insertion, update, and deletion according to the type of query statement, and the information about DB table can be obtained through the query statement, and it can be used as information for extracting entity bean of EJB by using it. Analysis method for extracting EJB components from a servlet program. 7. The method of claim 6, wherein the HTML analysis is By analyzing the tag of the HTML, a servlet program which analyzes the branch of the screen or the structure of the screen framework, the path to the included image file, the information about the linked file, and the information about the basic HTML components. Analysis method for extracting EJB components from the database.