JP2004127005A - Object-oriented programming support program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently create a derivative class succeeding characteristics of a basic class. <P>SOLUTION: In a computer 1, an object-oriented programming support program 4 is installed which realizes a function for displaying a base class registration screen capable of inputting an identification name of the basic class and an identification name of a library in which information about the basic class to be identified by the identification name is stored and a function for registering the inputted identification name of the basic class and the inputted identification name of the library in a database 5 by associating them with unique titles when both of the identification names are inputted to the basic class registration screen. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an object-oriented programming support program that supports object-oriented program development implemented on a computer.
[0002]
[Prior art]
In object-oriented programming in which a program is created by associating a plurality of objects with a module as an object as a unit, a class in which a data structure (field) inside the object and its operation procedure (method) are collectively defined is called a class. Classes can have a hierarchical structure. At that time, the lower class inherits the characteristics (fields and methods) of the upper class. Inheriting the characteristics of the upper class to the lower class is called "inheritance". Here, the upper class is called a base class, and the lower class is called a derived class.
[0003]
A conventional procedure for generating the derived class in a computer that implements object-oriented programming is shown in the flowchart of FIG. First, the programming operator operates the operation unit of the computer to instruct the additional class file to execute additional work (P1). Then, a dialog prompting the user to input a file name is displayed on the display screen of the computer, and the programming operator operates the operation unit to input an identification name of a desired derived class file (P2). As a result, a new derived class file is created in the computer.
[0004]
Next, the programming operator operates the operation unit to instruct the reference library to execute additional work (P3). Then, a dialogue for selecting a component file is displayed on the display screen of the computer, and the programming operator operates the operation unit to describe a definition code of a base class having characteristics inherited by the derived class. A component file (class library), which is a set of class files, is selected (P4). As a result, the selected component file is set as a reference library of the derived class in the computer.
[0005]
At this time, the display screen of the computer displays the data of the template indicating the definition code of the base class having the characteristic inherited by the derived class, so that the programming operator operates the operation unit. Then, the identification name (library name) of the component file selected as the reference library and the identification name (basic class name) of the class file serving as the base class are input to the predetermined positions of the template (P5). Thereafter, the programming operator operates the operation unit to input a definition code of a characteristic to be newly added to the base class in the derived class to the template, and update the template data (P6). In this way, a derived class having the updated template data as the definition code is created in the computer.
[0006]
[Problems to be solved by the invention]
As described above, in the conventional object-oriented programming, it is necessary to perform a complicated procedure shown in P1 to P6 in FIG. 6 to create one derived class. Similar programming work was required for the number of the derived classes, so the work efficiency was very poor.
[0007]
Therefore, an object of the present invention is to provide an object-oriented programming support program that can efficiently create a derived class that inherits the characteristics of a base class.
[0008]
[Means for Solving the Problems]
The present invention relates to an object-oriented programming support program installed in a computer that implements object-oriented programming, wherein the computer stores a base class identifier and information on the base class identified by the identifier. When the base class registration name and library identification name are entered on the base class registration screen, a function to display the base class registration screen in which the identification names of the A function of registering a unique title in the database in association with the unique title is realized.
[0009]
By taking such measures, the database stores the identification name of the base class and the identification name of the library input on the base class registration screen, corresponding to a plurality of different titles. Therefore, by selecting a title, the identification name of the base class associated with the title and the identification name of the library storing the information of the base class are easily specified.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Note that this embodiment relates to an object-oriented programming support program that causes a computer that performs object-oriented programming to realize the following functions (1) to (6).
[0011]
{Circle around (1)} Displaying a base class registration screen on a computer provided with the computer, in which an identification name of a base class and an identification name of a library storing information of the base class identified by the identification name can be input. function.
[0012]
(2) When the identification name of the base class and the identification name of the library are input by operating the operation unit provided on the computer on the base class registration screen displayed on the display unit by the function of (1), A function that associates both input identifiers with a unique title and registers them in the database.
[0013]
(3) A function for displaying a derived class generation screen on the display unit in which the identification name and title of the derived class can be input.
[0014]
(4) When the identification name and the title of the derived class are inputted by the operation of the operation unit on the derived class generation screen displayed on the display unit by the function of (3), the basics related to the inputted title are inputted. A function of acquiring a class identifier and a library identifier from the database.
[0015]
(5) A function of acquiring information of the base class identified by the base class identifier acquired from the database from the library identified by the library identifier acquired from the database by the function of (4).
[0016]
(6) A function of creating a derived class identified by the derived class identifier input on the derived class generation screen based on the basic class information acquired by the function of (5).
[0017]
FIG. 1 is a block diagram showing a configuration of a main part of a computer for executing object-oriented programming. A frame surrounded by a two-dot chain line denoted by reference numeral 1 in the drawing indicates a computer main body. The computer main body 1 is provided with a storage section 12, an input / output interface section 13, a communication control section 14, and the like, in addition to a programming basic function section (hereinafter abbreviated as a basic function section) 11.
[0018]
The basic function unit 11 is mainly composed of a program structure for performing object-oriented programming in which a program is created by associating a plurality of objects with each other as a unit of an object module in which a data structure (field) and its operation procedure (method) are integrated. It has a function of defining a class that is a set of objects having common characteristics (fields and methods), a function of inheriting the characteristics of the base class and generating a derived class to which new characteristics are added, and the like. I have.
[0019]
The storage unit 12 stores data in a rewritable manner in a storage medium such as a hard disk or a magneto-optical disk, and stores an object file in which an object program is described and a class file in which a class definition code is described. File is stored. The class file is a class library in which files of related classes are collected.
[0020]
The input / output interface unit 13 has a function of providing a data signal input by operating the operation unit 2 connected to the computer main body 1 to the basic function unit 11 and a function of connecting display data provided from the basic function unit 11 to the computer main body 1. And a function of outputting the displayed information to the display unit 3. As the operation unit 2, a keyboard, a pointing device, or the like is used. As the display unit 3, a screen display such as a CRT display or a liquid crystal display is used.
[0021]
The communication control unit 14 controls data communication performed with an external computer device via a communication medium such as a LAN (Local Area Network). In the present embodiment, an object-oriented programming support program (hereinafter referred to as a support program) 4 according to the present invention is provided to the computer main body 1 from an external computer device via a communication medium connected to the communication control unit 14. It is downloaded and installed on a hard disk or the like. The communication method may be wired or wireless.
[0022]
The support program 4 includes a database management function unit 41, a basic class registration function unit 42, and a derived class creation function unit 43.
[0023]
The database management function unit 41 writes data into the base class database 5, searches the base class database 5, and reads data. In the base class database 5, an identification name of a class file in which a definition code of a class that can be a base class is described (hereinafter, referred to as a base class name), and an identification name of a class library in which the class file is stored (Hereinafter, referred to as a library name) is stored in association with the unique title.
[0024]
The basic class registration function unit 42 supports the derived class generation function of the basic function unit 11 by executing the processing of the procedure shown in the flowchart of FIG.
That is, when the basic class registration operation is selected by the operation of the operation unit 2 and its execution is instructed, the basic function unit 11 gives the support program 4 an operation start instruction of the basic class registration function unit 42. In response to the operation start command, the basic class registration function unit 42 starts the processing in FIG.
[0025]
First, the basic class registration function unit 42 causes the display unit 3 to display, for example, a basic class registration dialog 6 of the layout shown in FIG. The basic class registration dialog 6 includes a title input field 61, a basic class name input field 62, and a library name input field 63. The dialog 6 is provided with a library name reference button 64, an OK button 65, and a cancel button 66 (function (1) above).
[0026]
After displaying the basic class registration dialog 6, the basic class registration function unit 42 waits for title data to be input to the title input field 61 of the dialog 6 as ST2. Then, when title data is input to the title input field 61 by operating the operation unit 2, the base class registration function unit 42 stores in the base class database 5 a title that overlaps with the title of the input data as ST 3. An inquiry is made to the database management function unit 41 as to whether or not it is stored.
[0027]
Upon receiving this inquiry, the database management function unit 41 searches the base class database 5 to check for duplication of the corresponding title, and returns the result to the base class registration function unit 42.
[0028]
Therefore, when receiving a response indicating that there is an overlap, the basic class registration function unit 42 returns to the process of ST2 and waits for title data to be input again. At this time, an error message such as “this title has already been used” may be displayed on the display unit 3 to urge the operator of the operation unit 2 to reenter the title data.
[0029]
On the other hand, if a response without duplication is received, the basic class registration function unit 42 stores the title data input to the title input field 61 in the memory as ST4. Then, the basic class registration function unit 42 waits for data of the basic class name to be input to the basic class name input field 62 of the basic class registration dialog 6 as ST5. When the data of the basic class name is input to the basic class name input field 62 by the operation of the operation unit 2, the basic class registration function unit 42 stores the input data of the basic class name in the memory as ST6. Remember.
[0030]
Next, the basic class registration function unit 42 waits for library name data to be input to the library name input field 63 of the basic class registration dialog 6 as ST7. Then, when the data of the library name is input into the library name input field 63 by the operation of the operation unit 2, the basic class registration function unit 42 stores the input data of the library name in the memory as ST8. At this time, when the reference button 64 of the basic class registration dialog 6 is pressed by the operation of the operation unit 2, the basic class registration function unit 42 displays the library name list of the class library formed in the storage unit 12. The list is displayed on the display unit 3. If any one of the library names is selected from the list by operating the operation unit 2, the base class registration function unit 42 determines that the selected library name has been input to the library name input field 63. Considering this, the data of the selected library name is stored in the memory.
[0031]
Next, the basic class registration function unit 42 waits until the OK button 65 of the basic class registration dialog 6 is pressed in ST9 or the cancel button 66 is pressed in ST10. When the OK button 65 is pressed by operating the operation unit 2, the basic class registration function unit 42 transmits the title, the basic class name, and the library name stored in the memory to the database management function unit 41 in ST11. A request is made to register in the base class database 5. Upon receiving this request, the database management function unit 41 additionally registers the base class name and the library name in the base class database 5 in association with the title (function (2) above).
[0032]
The base class registration function unit 42 displays the base class registration dialog 6 as ST12 after the registration request to the base class database 5 or when the cancel button 66 is pressed instead of the OK button 65 by operating the operation unit 2. The data is deleted from the unit 3 and the current process is terminated.
[0033]
The derived class creation function unit 43 supports the derived class generation function of the basic function unit 11 by executing the processing of the procedure shown in the flowchart of FIG.
That is, when the derived class creation task is selected by the operation of the operation unit 2 and its execution is instructed, the basic function unit 11 gives the support program 4 an instruction to start the operation of the derived class creation function unit 43. In response to the operation start instruction, the derived class creation function unit 43 starts the processing in FIG.
[0034]
First, the derived class creation function unit 43 causes the display unit 3 to display, for example, a derived class creation dialog 7 of the layout shown in FIG. The derived class creation dialog 7 includes a derived class name input field 71, which is the derived class identification name, a derived class file identification name display field 72, a title selection field 73, and a base class name display field 74. Have been. Further, the dialog 7 is provided with a title selection button 75, an OK button 76, and a cancel button 77 (the function of the above (3)).
[0035]
After displaying the derived class creation dialog 7, the derived class creation function unit 43 waits for data of the derived class name to be input to the class name input field 71 of the dialog 7 in ST 22. Then, when the data of the derived class name is input to the class name input field 71 by the operation of the operation unit 2, the derived class creation function unit 43 executes ST23 to generate a derived class file having the derived class name as a file name. The file name is added to the storage unit 12 and the file name is displayed in the display field 72 of the dialog 7.
[0036]
Next, the derived class creation function unit 43 waits for any one title to be selected from all the titles registered in the base class database 5 as ST24. Then, when the title selection button 75 is pressed by the operation of the operation unit 2, the derived class creation function unit 43 causes the database management function to display all the titles registered in the base class database 5 on the display unit 3. If the title is designated by the operation unit 2 and any one of the titles is designated by the operation of the operation unit 2, the derived class creation function unit 43 sets the designated title in the title selection field. At step ST5, a request is made to the database management function unit 41 for a base class name and a library name related to the title. Upon receiving this request, the database management function unit 41 searches the base class database 5, reads out the base class name and library name stored in association with the title, and responds to the derived class creation function unit 43. Therefore, the derived class creation function unit 43 acquires the base class name and the library name from the database management function unit 41 in ST25 (function (4) above).
[0037]
Next, the derived class creation function unit 43 displays the base class name acquired from the database management function unit 41 in the base class name display field 74 in ST26. In this state, the derived class creation function unit 43 waits until the OK button 76 of the derived class creation dialog 7 is pressed in ST27 or the cancel button 77 is pressed in ST28. When the OK button 76 is pressed by the operation of the operation unit 2, the derived class creation function unit 43 deletes the derived class creation dialog 7 from the display unit 3 in ST 29.
[0038]
Thereafter, the derived class creation function unit 43 performs the database management function function from the class files collected in the class library in the storage unit 12 identified by the library name acquired from the database management function unit 41 in ST30. The class file having the base class name obtained from the section 41 is selected, and the definition code of the class described in this class file is changed to the derived class identified by the derived class name entered in the derived class name input field 71. Fetch as definition code of inherited base class. Then, the data of the template indicating the definition code is displayed on the display unit 3, and the base class name and the library name acquired from the database management function unit 41 are automatically input at a predetermined position of the template. (Function of the above (5)).
[0039]
Thereafter, the derived class creation function unit 43 waits for a definition code of a property to be newly added to the base class in the derived class to be added to the template in ST31. Then, when a new definition code is additionally input to the template by operating the operation unit 2, the definition code of the template is described in the class file of the derived class, and the updated template data Is created in the computer main body 1 with the definition code of (1) (function (6) above). Thus, the derived class creation function unit 43 ends the current processing.
[0040]
If the cancel button 77 is pressed instead of the OK button 76 by operating the operation unit 2, the derived class creation dialog 7 is deleted from the display unit 3 as ST32, and the current process is terminated.
[0041]
In the present embodiment configured as described above, the programming operator registers a class that can be a base class in the base class database 5 in advance. At the time of this registration, the programming operator operates the operation unit 2 to select a basic class registration job and instructs the execution thereof. Then, a base class registration dialog 6 is displayed on the display unit 3. The programming operator operates the operation unit 2 to display a base class name for identifying a class to be registered and a definition code of this class in the dialog 6. And the library name of the class library in which the class file in which is described is stored together with an arbitrary title meaning the definition of this class. Then, when the OK button 65 is pressed, the base class name and the library name input to the dialog 6 are registered in the base class database 5 in association with the title input to the dialog 6. However, if the title entered in the dialog 6 overlaps with the title registered in the base class database 5, re-input of the title is required. Therefore, a base class name that is an identifier of a class that can be a base class and a library name that is an identifier of a class library in which a class file in which the definition code of the class is described are stored are unique titles. The association is registered in the base class database 5.
[0042]
As described above, in the present embodiment, a class that can be a base class is registered in the base class database 5 in advance, so that a derived class inheriting the characteristics of the base class can be easily generated.
[0043]
That is, when it becomes necessary to create a derived class, the programming operator selects a derived class creation job by operating the operation unit 2 and instructs the execution thereof. Then, a derived class creation dialog 7 is displayed on the display unit 3. The programming operator operates the operation unit 2 to enter an arbitrary name as an identification name of the derived class to be created in the class name input field 71 of the dialog 7. Enter the derived class name. Then, a file for a derived class having the derived class name as a file name is added to the storage unit 12 and the file name is displayed in the display field 72 of the dialog 7, so that the programming operator operates the operation unit 2 to operate the operation unit 2. From the title selection field 73 of the dialog 7, a title meaning a definition of a base class having characteristics inherited by the derived class is selected. Then, the base class name and the library name stored in association with the title are extracted from the base class database 5. Then, the class file identified by the base class name is read from the class library identified by the library name, and the template of the definition code described in the class file is displayed on the display unit. At this time, the library name and the base class name are automatically input at the predetermined positions of the template, so that the programming operator does not need to input the library name and the base class name in the template.
[0044]
Thereafter, the programming operator adds, to the displayed template, a definition code of a property to be newly added to the base class in the derived class. Then, the definition code of the template is described in the derived class file created in the storage unit 12. Thus, a derived class is created that inherits the data structure and operation procedure of the base class.
[0045]
As described above, in the present embodiment, the step of instructing execution of the derived class creation business, the step of inputting the desired derived class name and the corresponding title in the derived class creation dialog box 7, A new derived class can be created by a programming operation consisting of entering the definition code of the characteristic to be newly added to the template into the template and updating the template data. Steps can be reduced. Therefore, the work efficiency required for creating a derived file can be increased more than before, and the effect is particularly great when a plurality of derived files are created.
[0046]
In the above-described embodiment, the support program 20 is installed in the computer main body 1 using a communication medium. However, instead of the communication control unit 14, a CD-ROM (Compact Disc-Read Only Memory) or a flexible disk is used. A medium reading unit for reading data stored in a general-purpose storage medium such as the above is provided, and the support program 20 stored in the general-purpose storage medium is read by the medium reading unit and installed in the computer main body 1. Good.
[0047]
In the above-described embodiment, the support program 4 incorporates the database management function unit 41 for writing data to the base class database 5, searching the base class database 5, and reading data. The functions of 41 may be performed by the base class registration function unit 42 and the derived class creation function unit 43, respectively, and the database management function unit 41 may be omitted.
[0048]
In the above-described embodiment, the title is input along with the base class name and the library name from the base class registration dialog 6, but the title is automatically unique, for example, "Title 1", "Title 2", .. May be set.
In addition, it goes without saying that various modifications can be made without departing from the spirit of the present invention.
[0049]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide an object-oriented programming support program capable of efficiently creating a derived class that inherits the characteristics of a base class.
[Brief description of the drawings]
FIG. 1 is an exemplary block diagram showing a main configuration of a computer that executes object-oriented programming as an embodiment of the present invention.
FIG. 2 is a flowchart showing a main part of a processing procedure executed by a base class registration function unit of the object-oriented programming support program in the embodiment.
FIG. 3 is a flowchart showing a main part of a processing procedure executed by a derived class creation function unit of the object-oriented programming support program in the embodiment.
FIG. 4 is a schematic diagram showing an example of a basic class registration dialog.
FIG. 5 is a schematic diagram showing an example of a derived class creation dialog.
FIG. 6 is a flowchart showing a main part of a conventional derived class creation procedure.
[Explanation of symbols]
1. Computer body
2 ... Operation unit
3 Display unit
4: Object-oriented programming support program
5: Base class database
6 ... Register basic class dialog
7… Create derived class dialog
11: Basic programming function section
12 ... storage unit
13. Input / output interface
14 Communication control unit
41 ... Database management function section
42: Basic class registration function section
43 ... Derived class creation function part

Claims (2)

A computer that implements object-oriented programming that performs programming using a derived class that inherits the characteristics of the base class,
A function of displaying a base class registration screen capable of inputting an identifier of the base class and an identifier of a library in which information of the base class identified by the identifier is stored;
When the identifier of the base class and the identifier of the library are input on the base class registration screen, a function of registering the input identifiers in a database in association with a unique title is realized. An object-oriented programming support program characterized by: A computer that implements object-oriented programming that performs programming using a derived class that inherits the characteristics of the base class,
A function of displaying a base class registration screen capable of inputting an identifier of the base class and an identifier of a library in which information of the base class identified by the identifier is stored;
When the identifier of the base class and the identifier of the library are input on the base class registration screen, a function of associating the input identifiers with a unique title and registering the identifier in a database;
A function of displaying a derived class generation screen capable of inputting the identifier of the derived class and the title,
When an identifier and a title of the derived class are input on the derived class generation screen, a function of acquiring a base class identifier and a library identifier associated with the input title from the database;
A function of acquiring information of a base class identified by a base class identifier acquired from the database from a library identified by a library identifier acquired from the database by this function;
A function for creating a derived class identified by a derived class identifier input on the derived class generation screen based on the base class information acquired by this function.

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