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From "David Solis" <dso...@legosoft.com.mx>
Subject Maybe an error due to changes to PageRecorder in 2.4
Date Wed, 05 Feb 2003 02:42:07 GMT
I hope this is a smart question ☺

I’m porting an application from 2.3 to 2.4

I’ve a page with a persistent attribute of type Vector for example movements. The source
excerpt is:

    public Vector getMovements()
    {
        return movements;
    }

    public void setMovements(Vector movements)
    {
        this.movements = movements;
        fireObservedChange("movements", movements);
    }

    public void detach()
    {
        movements = null;
        super.detach();
    }

The exception is:

net.sf.tapestry.ApplicationRuntimeException
Unable to update expression '<parsed expression>' of com.ixe.isis.ixewap.Movements@12c3327[Movements]
to [].
ognl.MethodFailedException
Method setMovements failed for object com.ixe.isis.ixewap.Movements @12c3327[Movements]
java.lang.NoSuchMethodException
setMovements(java.util.ArrayList)
ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java) 
                ognl.OgnlRuntime.callMethod(OgnlRuntime.java) 
                ognl.OgnlRuntime.setMethodValue(OgnlRuntime.java) 
                ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java)

                ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java) 
                ognl.OgnlRuntime.setProperty(OgnlRuntime.java) 
                ognl.ASTProperty.setValue(ASTProperty.java) 
                ognl.Ognl.setValue(Ognl.java) 
                net.sf.tapestry.util.prop.OgnlUtils.set(OgnlUtils.java:142) 
                net.sf.tapestry.util.prop.OgnlUtils.set(OgnlUtils.java:125) 
                net.sf.tapestry.record.PageRecorder.rollback(PageRecorder.java:260) 
                net.sf.tapestry.engine.RequestCycle.getPage(RequestCycle.java:272) 
                net.sf.tapestry.engine.DirectService.service(DirectService.java:165) 
                net.sf.tapestry.engine.AbstractEngine.service(AbstractEngine.java:882) 
                net.sf.tapestry.ApplicationServlet.doService(ApplicationServlet.java:232)

                net.sf.tapestry.ApplicationServlet.doPost(ApplicationServlet.java:362) 
                javax.servlet.http.HttpServlet.service(HttpServlet.java:760) 


The problem is that the PageRecorder (via the DefaultValuePersister and ListCopier) tries
to save the movements as an ArrayList instead of a Vector.

I already know how many ways to solve this issue from changing the code to writing an extension
for a custom Value Persister. My question is: Is this the expected behavior? Is it a bug?

Any ideas?

Regards

David





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