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See this thread for details.
Win a copy of Head First Android this week in the Android forum!
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Expression Builder

 
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I am looking at building and expression builder , the expressions built through this will be used to evaluate conditions that decide the work flow.
Workflow has parameters like width, height etc., vehicle type etc some of which will be strings and some of then int type. Expressions can be a combination of these parameters and logical operators And,or,less than,greater than etc.,
any ideas for desing are there any existing stuff that would help ?
 
Consider Paul's rocket mass heater.
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