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From "Henri Yandell (JIRA)" <>
Subject [jira] Created: (LANG-676) Potential Autoboxing problems with BooleanUtils methods
Date Wed, 02 Feb 2011 05:45:28 GMT
Potential Autoboxing problems with BooleanUtils methods

                 Key: LANG-676
             Project: Commons Lang
          Issue Type: Bug
            Reporter: Henri Yandell
             Fix For: 3.0

FindBugs points out the following are bad:

org.apache.commons.lang3.BooleanUtils.toBooleanObject(String, String, String, String)
org.apache.commons.lang3.BooleanUtils.toBooleanObject(Integer, Integer, Integer, Integer)
org.apache.commons.lang3.BooleanUtils.toBooleanObject(int, int, int, int)

For each case it's because the method returns Boolean, and returns null. That used to be a
feature, but apparently that plays merry havoc with autoboxing:

++NP: Method with Boolean return type returns explicit null (NP_BOOLEAN_RETURN_NULL)

++A method that returns either Boolean.TRUE, Boolean.FALSE or null is an accident waiting
to happen. This method can be invoked as though it returned a value of type boolean, and the
compiler will insert automatic unboxing of the Boolean value. If a null value is returned,
this will result in a NullPointerException. 

The only solution imo is to let autoboxing do its job and remove these methods.

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