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From "Niall Pemberton (JIRA)" <j...@apache.org>
Subject [jira] Commented: (BEANUTILS-339) BeanUtilsBean.setProperty throws IllegalArgumentException if value is null
Date Fri, 20 Feb 2009 22:25:02 GMT

    [ https://issues.apache.org/jira/browse/BEANUTILS-339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12675491#action_12675491
] 

Niall Pemberton commented on BEANUTILS-339:
-------------------------------------------

Seems to me like its doing exactly what the API says -looking at the source for BeanUtils
1.8.0

{code}
            if ((value instanceof String) || (value == null)) {
                 newValue = getConvertUtils().convert((String) value, type);
{code}

http://commons.apache.org/beanutils/xref/org/apache/commons/beanutils/BeanUtilsBean.html#1002

Seems to me the problem is probably that you don't have a converter registered for java.util.Comparator
or that you should configure the String converter to return null

http://commons.apache.org/beanutils/xref/org/apache/commons/beanutils/ConvertUtilsBean.html#446


> BeanUtilsBean.setProperty throws IllegalArgumentException if value is null
> --------------------------------------------------------------------------
>
>                 Key: BEANUTILS-339
>                 URL: https://issues.apache.org/jira/browse/BEANUTILS-339
>             Project: Commons BeanUtils
>          Issue Type: Bug
>          Components: Bean / Property Utils
>    Affects Versions: 1.8.0-BETA
>            Reporter: Alan Escreet
>            Priority: Blocker
>             Fix For: 1.8.0-BETA
>
>
> Line 1003-1004 conflicts with API doc: "If null is passed into a property expecting a
primitive value, then this will be converted as if it were a null string."
> Line 1003 only tests if the value is null and 1004 explicitly casts to a String. If a
bean has a field of any other type, i.e. java.util.Comparator, then this fails with:
> {{java.lang.IllegalArgumentException: Cannot invoke <myBean>.setComparator on bean
class 'class <myBean>' - argument type mismatch - had objects of type "java.lang.String"
but expected signature "java.util.Comparator"}}

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