[jboss-jira] [JBoss JIRA] Created: (JBRULES-2009) Use compareTo() instead of equals() with BigDecimal

[Libor Nenadál (JIRA)]

Use compareTo() instead of equals() with BigDecimal
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                 Key: JBRULES-2009
                 URL: https://jira.jboss.org/jira/browse/JBRULES-2009
             Project: JBoss Drools
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
          Components: drools-core
            Reporter: Libor Nenadál
            Assignee: Mark Proctor
            Priority: Minor


Currently BigDecimals are compared using equals() and the problem is following:
(new BigDecimal("43.0")).equals(new BigDecimal("43")) is evaluated to false but
(new BigDecimal("43.0")).compareTo(new BigDecimal("43")) is evaluated to 0 => they are equal

Note that you should use String in constructor instead of double otherwise you get something unpredictable (see http://java.sun.com/j2se/1.4.2/docs/api/java/math/BigDecimal.html#BigDecimal(double))

And because your evaluator uses equals, it is quite unusable. Is it possible to do some special wrapper for this type? Just for equality, other operations would be nice to look like "x * y" but with division you need to specify scale and therefore I think it is not possible to wrap it to some nice look. :-( The con is that compareTo() ignores scale but for common usage scenarios it should not matter.

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