Re: [showstopper] NPE in CForms MultivalueJXPathBinding

[Marco Rolappe]

these multi value problems seem to stem from the following code (which 
is not present in 2.1.6) in MultiValueJXPathBinding.doSave:

...
        multiValueContext.setFactory( new AbstractFactory() {
            public boolean createObject(JXPathContext context, Pointer 
pointer,
                                        Object parent, String name, int 
index) {
                final Object o = context.getValue(name);
                if( Collection.class.isAssignableFrom( o.getClass() ) ) {
                    ((Collection)context.getValue(name)).add(null);
                } else if( o.getClass().isArray() ) {
                    // not yet supported
                    return false;
                } else {
                    return false;
                }
                return true;
            }
        });
...

after removing that code, the problem is gone. the NPE is thrown because 
o can be null.

Sylvain Wallez schrieb:
Go to http://localhost:8888/samples/blocks/forms/form2xml.flow and click 
"Submit Query"...

java.lang.NullPointerException
   at 
org.apache.cocoon.forms.binding.MultiValueJXPathBinding$1.createObject(MultiValueJXPathBinding.java:111) 

   at 
org.apache.commons.jxpath.ri.model.dom.DOMNodePointer.createChild(DOMNodePointer.java:382) 

   at 
org.apache.commons.jxpath.ri.model.beans.NullPropertyPointer.createPath(NullPropertyPointer.java:125) 

   at 
org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.createPath(JXPathContextReferenceImpl.java:447) 

   at 
org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.createPath(JXPathContextReferenceImpl.java:427) 

   at 
org.apache.cocoon.forms.binding.MultiValueJXPathBinding.doSave(MultiValueJXPathBinding.java:131) 

   ...
Giacomo, any idea?
Sylvain