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https://issues.apache.org/jira/browse/BEANUTILS-422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13581461#comment-13581461
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Alex Crown edited comment on BEANUTILS-422 at 2/19/13 5:29 PM:
---------------------------------------------------------------
I investigated problem more accuratly.
Bug caused by "Workaround for Bug 28358" in
_org.apache.commons.beanutils.PropertyUtilsBean#getPropertyDescriptors_. There
we fill read/write methods for indexed properties with collections.
When getPropertyType executes for second ancestor, this methods exists in
PropertyDescriptor and
_java.beans.IndexedPropertyDescriptor#findIndexedPropertyType_ fails on "type
mismatch between indexed and non-indexed methods: ". It await array in
PropertyDescriptor.propertyType, but there is ArrayList.
As I understand, Collestions in Indexed properties contrary to the JavaBeans
specification 1.1.
In [^PropertyUtilsBean.java.patch] I clear Introcpector cache for affected
classes. After cleaning it works fine.
was (Author: alexcrown):
I investigated problem more accuratly.
Bug caused by "Workaround for Bug 28358" in
_org.apache.commons.beanutils.PropertyUtilsBean#getPropertyDescriptors_. There
we fill read/write methods for indexed properties with collections.
When getPropertyType executes for second ancestor, this methods exists in
PropertyDescriptor and
_java.beans.IndexedPropertyDescriptor#findIndexedPropertyType_ fails on "type
mismatch between indexed and non-indexed methods: ". It await array in
PropertyDescriptor.propertyType, but there is ArrayList.
As I understand, Collestions in Indexed properties contrary to the JavaBeans
specification 1.1.
In !PropertyUtilsBean.java.patch! I clear Introcpector cache for affected
classes. After cleaning it works fine.
> getPropertyType return null on second descendant class
> ------------------------------------------------------
>
> Key: BEANUTILS-422
> URL: https://issues.apache.org/jira/browse/BEANUTILS-422
> Project: Commons BeanUtils
> Issue Type: Bug
> Components: Bean / Property Utils
> Affects Versions: 1.8.3
> Environment: Oracle JDK 1.7.0.10 and later.
> Reporter: Alex Crown
> Assignee: Oliver Heger
> Attachments: PropertyUtilsBean.java.patch, test.zip
>
>
> PropertyUtils.getPropertyType() for IndexedProperty works only for first
> invoked descendant class.
> Bug reproduced in JDK 1.7.0.10 - 13. In JDK 1.7.0.9 it works fine. As I see,
> in JDK 1.7.0.10 java.beans.Introspector was changed, but I don't understand
> how it works.
> *Example*
> *file* is IndexedProperty of the RootBean (attachend to issue) with type
> ArrayList<String>.
> RoootBean has two empty descendans: *FirstChildBean* and *SecondChildBean*.
> {code}
> RootBean bean = new FirstChildBean();
> Class propertyType = PropertyUtils.getPropertyType(bean, "file[0]");
> System.out.println(propertyType != null ? propertyType.getName() : null);
> -- Expected: java.lang.String, Actual: java.lang.String
> bean = new SecondChildBean();
> propertyType = PropertyUtils.getPropertyType(bean, "file[0]");
> System.out.println(propertyType != null ? propertyType.getName() : null);
> -- Expected: java.lang.String, Actual: null
> {code}
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