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From "Alexander Gavrilov (JIRA)" <...@tapestry.apache.org>
Subject [jira] Created: (TAPESTRY-2422) java.lang.UnsupportedOperationException thrown when tapestry render error page for exception with at leas onw writable only property
Date Fri, 16 May 2008 09:25:00 GMT
java.lang.UnsupportedOperationException thrown when tapestry render error page for exception
with at leas onw writable only property
------------------------------------------------------------------------------------------------------------------------------------

                 Key: TAPESTRY-2422
                 URL: https://issues.apache.org/jira/browse/TAPESTRY-2422
             Project: Tapestry
          Issue Type: Bug
    Affects Versions: 5.0.11
            Reporter: Alexander Gavrilov
            Priority: Critical
             Fix For: 5.0.12


when displayed exception contains at least one write-only property tapestry failing to render
error page.
java.lang.UnsupportedOperationException: Class ui.Exception_detail does not provide an accessor
('getter') method for property 'faultCode'
at org.apache.tapestry.ioc.internal.services.PropertyAdapterImpl.get(PropertyAdapterImpl.java:81)
        at org.apache.tapestry.ioc.internal.services.ClassPropertyAdapterImpl.get(ClassPropertyAdapterImpl.java:81)
        at org.apache.tapestry.ioc.internal.services.ExceptionAnalyzerImpl.extractInfo(ExceptionAnalyzerImpl.java:105)
        at org.apache.tapestry.ioc.internal.services.ExceptionAnalyzerImpl.analyze(ExceptionAnalyzerImpl.java:50)

it seems like error in extractInfo method, which does not analyze can it read property or
not before invoking adapter.get(). So, it is simple to patch 
Instead of 

        Object value = adapter.get(t, name);
        if (value == null) continue;

 Use 

        PropertyAdapter pa = adapter.getPropertyAdapter(name);    
        if (!pa.isRead()) continue;

        Object value = pa.get(t);
        if (value == null) continue;


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