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Object Oriented Programming In C

In Enterprise Architect, you apply a number of conventions for Object-Oriented programming in C.

To configure the system to support Object-Oriented programming using C, you must set the 'Object Oriented Support' option to True on the 'C Specifications' page of the 'Preferences' dialog.

Stereotypes

Stereotype

Applies To

See also

enumeration

Class

Corresponds To: An enumerated type.

struct

Class

Corresponds To: A 'struct' type.

Attribute

A keyword struct in variable definition.

typedef

Class

Corresponds To: A 'typedef' statement, where the parent is the original type name.

union

Class

Corresponds To: A union type.

Attribute

A keyword union in variable definition.

Tagged Values

Tag

Applies To

See also

anonymous

Class with stereotype of 'enumeration', 'struct' or 'union'

Corresponds To:  The name of this Class being defined only by the typedef statement.

bodyLocation

Operation

Corresponds To: The location the method body is generated to; expected values are 'header', 'classDec' or 'classBody'.

define

Attribute

Corresponds To: '#define' statement.

typedef

Class with stereotype of 'enumeration', 'struct' or 'union'

Corresponds To: This Class being defined in a 'typedef' statement.

Object-Oriented C Code Generation for UML Model

The basic idea of implementing a UML Class in C code is to group the data variable (UML attributes) into a structure type; this structure is defined in a .h file so that it can be shared by other Classes and by the client that referred to it.

An operation in a UML Class is implemented in C code as a function; the name of the function must be a fully qualified name that consists of the operation name, as well as the Class name to indicate that the operation is for that Class.

A delimiter (specified in the 'Namespace Delimiter' option on the 'C Specifications' page) is used to join the Class name and function (operation) name.

The function in C code must also have a reference parameter to the Class object - you can modify the 'Reference as Operation Parameter', 'Reference Parameter Style' and 'Reference Parameter Name' options on the 'C Specifications' page to support this reference parameter.

Limitations of Object-Oriented Programming in C

  • No scope mapping for an attribute: an attribute in a UML Class is mapped to a structure variable in C code, and its scope (private, protected or public) is ignored
  • Currently an inner Class is ignored: if a UML Class is the inner Class of another UML Class, it is ignored when generating C code
  • Initial value is ignored: the initial value of an attribute in a UML Class is ignored in generated C code

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