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1answer
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is a factory pattern to prevent multuple instances for same object (instance that is Equal) good design?
I have a number of objects storing state. There are essentially two types of fields. The ones that uniquly define what the object is (what node, what edge etc), and the oens that store state ...
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I should have used a factory method instead of a constructor. Can I change that and still be backwards-compatible?
The problem
Let's say I have a class called DataSource which provides a ReadData method (and maybe others, but let's keep things simple) to read data from an .mdb file:
var source = new ...
