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POVBA for Office Class Module (Object) Factory
 

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    <p>I have a relatively complex application for Access 2007 written in VBA (4 enumerations, 7 modules, 38 class-modules, 86 forms, and a whole slew of tables and queries) . I've found a situation where it would be beneficial to use an Object Factory design, but so far I am unable to find a clean way to implement this type of functionality without the standard abstract/inheritance that is easily accomplished in VB or C#.</p> <p>Has anyone had any experience implementing a factory design in VBA, and is it even possible? ... Or is there a neat "trick" that can help me obtain the same overall goal?</p> <p>My experience on factory design is limited to C#, and i've never done it in VB, so maybe there is something in VBA that is common to VB that I am missing.</p> <p><strong>Example</strong></p> <p>I will be receiving a specific date. based on that date i will need to calculate anywhere between 2 and 5 other dates. the rules for calculating these dates changes based on the "type" of date being entered.</p> <p>So if I have a date of 07/15/2009, and this is a type 1 date it would return</p> <p>07/15/2010 for date 1, 07/15/2011 for date 2, 07/15/2012 for date 3, 06/10/2012 for date 4 and 07/10/2012 for date 5</p> <p>if i put the same date but put it in as a date type 2 i would get null for date 1, null for date 2, null for date 3, 06/10/2011 for date 4 and 07/10/2011 for date 5</p> <p>so for each set of rules there will be a minimum of 3 possible max of 6 (for now this could always expand at any time) i will basically be entering a starting date... the rule... and returning an object that will contain all of the date properties.</p> <p>I hope that helps a little bit.</p>
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    1. COWow ! Access 2008 ! Where did you find THAT ? A see sharp special ?
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    2. CO/facepalm my mistake. 2007. At least in my defense the 7 and 8 are right beside each other on the keyboard ><
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    3. COThese aren't really "factory"-specific answers, but you might find them helpful re: inheritance and object creation in VBA. In short, it's a pain. See: http://stackoverflow.com/questions/3669270/vba-inheritance-analog-of-super/3671434#3671434 and http://stackoverflow.com/questions/1731052/is-there-a-way-to-overload-the-constructor-initialize-procedure-for-a-class-in/1744818#1744818
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