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From "Jonathan Haber (Created) (JIRA)" <>
Subject [jira] [Created] (CXF-4055) Parameter Handler not Invoked if Constructor or Static Methods Succeed
Date Mon, 23 Jan 2012 17:24:40 GMT
Parameter Handler not Invoked if Constructor or Static Methods Succeed

                 Key: CXF-4055
             Project: CXF
          Issue Type: Bug
          Components: JAX-RS
    Affects Versions: 2.5.1
            Reporter: Jonathan Haber
            Priority: Minor
             Fix For: 2.5.2

My reading of InjectionUtils suggests that when performing type conversion, custom parameter
handlers appear to be the last resort. If the object has a single-string constructor or a
static valueOf/fromString method and any of these succeed, custom parameter handlers will
not be invoked. 

This is causing issues in our application where users are able to define their own date formats
and the string values are passed as query parameters. We implemented ParameterHandler<Date>
and in the fromString body parse the string value according to the specific user's date format.
But depending on the date format, the String constructor of java.util.Date may or may not
throw an exception depending on the specific date format. If it does not succeed, our parameter
handler is reached and all is well. But if it does "succeed" this date will be used by CXF
and our parameter handler is never reached (This is a problem because even if the constructor
doesn't throw an exception, the date is usually parsed incorrectly and represents the wrong

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