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Asked: 2026-05-11T07:24:00+00:00

I have to read business rules stored in XML file (I am using VC++/MFC/MSXML).

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I have to read business rules stored in XML file (I am using VC++/MFC/MSXML). XML consists of rules. Each rule has a set of conditions and actions. What would be an elegant OOP design for such system? What design patterns would you use if you where a designer of such system?

update:
Rules are put in sequence and executed one buy one if all conditions of rule are met.

example of xml: 

    <rules>       <!--  rule no. 1 -->       <rule name='rule no. 1'>          <conditions>             <condition name='condition no. 1' type='ATTR_EMPTY'>                <parameters>                   <parameter name='attribute_name'>ttt</parameter>                   <parameter name='workflow_id'>3</parameter>                   <parameter name='workflow_state_id'>5</parameter>                </parameters>             </condition>             <condition name='condition no. 2' type='ATTR_EMPTY'>                <parameters>                   <parameter name='attribute_name'>ttt</parameter>                   <parameter name='enviroment_id'>3</parameter>                </parameters>             </condition>          </conditions>          <actions>             <action name='action no. 1' type='ATTR_CLEAR'>                <parameters>                   <parameter name='attribute_name'>ttt</parameter>                </parameters>             </action>          </actions>       </rule>    </rules>
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1 Answer

  1. Difficult to tell from such a brief description, but I would make each rule an object which manages its own conditions and actions. The rules would be created by a factory from the XML and stored in some sort of dictionary.

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