Boolean Expression Evaluation Framework

[Priyanka Dandekar]

We are looking for an expression evaluation framework where we can provide input as boolean conditions like this

(MyData1 = 'A') AND (MyData2 = 'B' OR MyData2 = 'C' OR MyData2 = 'D')


I would be getting a String expression and would provide the data to that expression to find what will be the result.

Any suggestions of pointers would be appreciated.

[Ulf Dittmer]

I don't recall if it supports exactly this syntax, but check out the JEP library. Version 2.4 was released under the GPL, so you may be able to use it for free.

[Sachin Joshi]

JEP is a good Java library, and its 2.4.1 version was GPL.

The Boolean expressions are supported but it does not give direct boolean result.

The results of a boolean expression would be returned to you as a Double object where 1.0 = TRUE and 0.0 is FALSE.


The Boolean Expression Evaluation Example code can be used as a Utility in your application for Boolean expression evaluation.
[ September 22, 2008: Message edited by: Sachin Joshi ]

[Priyanka Dandekar]

Ulf and Sachin, thanks a lot for your responses. This is definitely useful for me.

Sachin I am using your util class for implementation, it looks handy.

[mohan pusarla]

Hi ,
If i can understand you correctly Your system always get the expression at the Run time and the values to be replaced in the expression also comes in run time. Recently i was also in search of looking for a similar framework approach. I found cayenne framework..you can use it very easily.Reply me back if you have any queries.

[Ulf Dittmer]

mohan,
can you provide a link to this "cayenne" framework? The only Java project with that name I can find is an ORM tool, and I don't think that would be applicable here.

[Gupta Mohit Gupta]

Check http://code.google.com/p/xpressionengine/. It may cater the requirements.