Key words
web, interpreter, declarative programming, abstract factor, design patterns, DSL, domain-specific languages, XML, BML, BlockSet, C, C++.
articles
Authors:
Keyno P., Yarmukhametov P. Published in
№ 1(67)
27 february 2017 year
Rubric: Software development technologies
Rubric: Software development technologies
Using «Abstract factory» pattern in implementation of validation and data-transformation module of BlockSet interpreter software
The article considers the architecture of validation and data-transformation module used in BML
interpreter. BML is declarative modeling domain-specific language created by authors for web-developing.
The article discusses about theoretical basis and practical implementation of Block element.
Definition of the architecture class inheritance and search for a universal solution are considered for
writing the corresponding module using some design patterns one of them is «abstract factory». The
pattern allows making of universal architecture of Block class. There is a problem related with Block
nature. The block can be declared in BML language with different data types, so that data must be
validated and transformed in different ways. In case of integer data type we need to check that it has
only digits, but string type has no limits with allowed characters. The string consisted digits in integer
type should be converted to number by internal algorithms. So, we need to develop architecture with
universal input with different ways to process data depended on their type. The solution of using the
«abstract factory» pattern is the best way to that task. Authors developed abstract class named «Block»
with virtual methods and different concrete classes for each block of different data type. Each concrete
class has a standard set of methods inherited of abstract class.
The author:
Keyno P.
Degree:
PhD in Engineering, Senior Lecturer, Department no.316, Moscow Aviation Institute, Moscow
Location:
Moscow
All articles:
The author:
Yarmukhametov P.
Degree:
Undergraduate, Department of System Modeling and Engineering Graphics, Moscow Aviation Institute (National Research University)
Location:
Moscow
