| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a data access device for preventing an unauthorized client from directly accessing and rewriting/reading system specification data required for controlling a plurality of control objects. <P>SOLUTION: This data access device is composed of: a specification data class 7 having a setting interface and an acquisition interface to this data as a public method by holding the system specification data required for controlling an A class 1 and a B class 5 as a private attribute; a specification updating client class 3 having a specification changing interface for updating an attribute of the system specification data by making access to the specification data class as the public method; and the A class and the B class having realizing interfaces 2 and 6 for realizing one's own duty by using the attribute of the system specification data as the public method, by using the object-oriented notation UML. <P>COPYRIGHT: (C)2007,JPO&INPIT |
