JPH09212345A - Object linkage definition method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the associative relating description between class an attribute by providing a relative defining function for the class, a relative defining function for the attribute, and a method automatic calling function. SOLUTION: A temperature control system for a bath burner 1 is regarded as a system controlled to be and programmed in an object-oriented language. A relative class is defined to generate the objects of a burner class and a sensor class as relative classes by the object generation of a bath burner class in initial start function definition and also generate the object of a controller class. When set temperature of a console panel 5 is set by defining a relative attribute, the set temperature of a controller 4 varies to the same value at the same time. Further, the alarm upper limit and lower limit temperatures of the controller 4 are set. A correcting function is set and then a current temperature display is called when the current temperature of the console panel 5 varies, so that the varied temperature is displayed on a display panel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an object cooperation definition method using an object-oriented programming language.

[0002]

2. Description of the Related Art Currently, a program for a computer is described, and when the program is executed, all operations are described in a high-level language program, and a procedure for converting the program into an execution form is taken.

Similarly, in object-oriented programming, a class is defined and an attribute describes a procedure called a method. In addition, programmers describe all the cooperation between classes, cooperation between attributes between classes, methods and attributes, and cooperation between methods.

[0004]

Despite the fact that the classes necessary for writing an object-oriented program are extracted in the analysis process and the relation between the classes is known in advance when they are implemented by a programming language,
It is necessary to define a class for all classes and describe the relationship between related classes as a method of a class.

Similarly, even when an attribute of a certain class is related to an attribute of another class, the relationship must be described by a method of the equal class.

[0006] In such a programming technique, describing all the associations in order to connect the classes to each other at run time is likely to cause the associations to be forgotten. Also, in the method association between attributes, all related attributes must also be described in the method.
It is easy to forget the description and mix bugs.

An object of the present invention is to provide an object cooperation definition method that facilitates the association description between classes and attributes.

[0008]

According to the present invention, in creating a program using an object-oriented programming language, when an object is created or deleted from a class, a class that creates or deletes an object from the associated defined class is also provided. Related definition function and when the attribute of the object is changed, the same attribute is set for other related defined objects. It is characterized by having a different value relation definition function of an attribute that sets a value associated with a function with an object, and a method automatic call function that calls a defined method when the value of an optional attribute is changed. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows a system for controlling the temperature of a bath. The bath pot 1 is provided with a burner 2 for increasing the temperature of bath water and a sensor 3 for measuring the temperature of bath water. A control device 4 and an operation panel 5 for on / off control of the burner 2 are provided.

The operation panel 5 includes switches 5 ₁ and 5 ₂ for increasing / decreasing the set temperature, numerical display panels 5 ₃ and 5 ₄ for the present temperature and the set temperature, an alarm lamp 5 ₅ and a switch 5 _{6 for} stopping operation.
5 ₇ are provided.

When programming is performed using an object-oriented programming language with such a temperature control system as a control target, a program in which class objects are defined and associated with each other is created. Enables programming with related definitions.

(1) Related Definition of Class Object In the class definition, the related class (relation_
By defining "class)", when an object is generated from a class, an object is also generated from the associated defined class, and the objects have links to each other.

FIGS. 2 to 4 show a part of the program of the temperature control system for a bath kettle, in which the burner class and the sensor which become the related classes by the object generation of the bath kettle class in the initial starting function definition (main_loop). An object of the class is generated, and an object of the burner class is generated by the propagation, so that an object of the controller class is generated.

The controller produces only those referenced by the sensor and burner but propagated earlier. Similarly, the related objects are created by propagation.

FIG. 5 shows a state in which a class object in which objects are linked to each other is generated.

(2) Equivalence relation definition of attribute In the class definition, the relation attribute (relation_a
By defining ttr), attributes are associated between objects. This definition is set by copying the exact same attribute by the equal option.

In the example shown in FIGS. 2 to 4, when the set temperature of the operation panel is set, the set temperature of the control device simultaneously changes to the same value.

(3) Different value relation definition of attribute In the class definition, the relation attribute (relation_a)
By defining the (ttr), the value of the function in the related value is set by the function option when associating the attributes between the objects.

In the example of FIGS. 2 to 4, the alarm upper limit value of the control device is set to +5 degrees and the alarm lower limit temperature is set to -8 degrees. This is called every time the set temperature is set,
Calculate the function and set each alarm temperature.

(4) Method automatic call when attribute value is changed In the class definition, a modification function (modify_dae)
mon) to call the defined method when a value is set for an optional attribute.

In the example of FIG. 4, when the current temperature of the operation panel changes, the current temperature display is called and the changed temperature is displayed on the display panel.

As described above, in this embodiment, by defining the relations of the classes (objects), the objects for which the relations are defined can be simultaneously generated by one instruction. Further, even when the objects are deleted, the related objects can be deleted synchronously. As a result, it is possible to simplify the procedure and prevent a mistake in forgetting to describe the procedure for creating / deleting an object.

Further, by the value synchronization setting mechanism between the attributes of the class (object), when the attribute value of one object is changed, the value of the related object can be changed at the same time. As a result, it is possible to omit a procedure that describes a procedure such as a method and synchronizes attributes between objects.

Further, when values are set, it is possible to set different values in synchronization with each other by defining a simple procedure conversion function.

Also, the description of calling a method can be omitted by a mechanism for automatically calling a method procedure when a certain attribute is changed.

[0026]

As described above, according to the present invention, in describing a program using an object-oriented programming language, a class relation definition function, an attribute equivalence relation definition function, and an attribute different value relation definition function are provided. Also, since the function automatic call function is provided, the description of object creation and deletion can be simplified, and mistakes can be prevented.

[Brief description of drawings]

FIG. 1 Temperature control system for bath kettle.

FIG. 2 is a bath stove temperature control program (1) according to the embodiment of the present invention.

FIG. 3 is a bath oven temperature control program (2) according to the embodiment of the present invention.

FIG. 4 is a bath oven temperature control program (3) according to the embodiment of the present invention.

FIG. 5 is a link structure of objects according to the embodiment of the present invention.

[Explanation of symbols]

 1 ... Bath pot 2 ... Burner 3 ... Sensor 4 ... Control device 5 ... Operation panel

Claims (1)

[Claims] 1. When creating a program using an object-oriented programming language, a class related definition function of creating and deleting an object from a class that is defined when creating and deleting an object from the class, and an attribute of the object. When changing the, the attribute equivalency related definition function that sets the same attribute to other related defined objects, and the value associated with another related defined object by a function when the attribute of the object is changed An object linkage definition method characterized by having a different value related definition function of the attribute to be set and an automatic method calling function that calls the defined method when the value of the optional attribute is changed.