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From "Venkat Reddy (JIRA)" <>
Subject [jira] Commented: (AXIS-2029) SOAPHeader.appendChild() throws unexpected ClassCastException
Date Thu, 02 Jun 2005 08:26:51 GMT
     [ ]
Venkat Reddy commented on AXIS-2029:

I think we should accept TextNode also as child for SOAPHeader block. Does anyone know why
the NodeImpl.appendChild has been overridden?

SOAP 1.2 spec:
"Each SOAP header block element information item MAY have any number of character information
item children. Child character information items whose character code is amongst the white
space characters as defined by XML 1.0 are considered significant".

Seems it also applies for SOAPBody !
- venkat

> SOAPHeader.appendChild() throws unexpected ClassCastException
> -------------------------------------------------------------
>          Key: AXIS-2029
>          URL:
>      Project: Axis
>         Type: Bug
>   Components: Basic Architecture, SAAJ
>     Versions: 1.2
>  Environment: Windows XP Pro/WebSphere 4.0
>     Reporter: Mark Tye
>  Attachments: 2029.diff
> The class org.apache.axis.message.SOAPHeader overrides the appendChild(org.w3c.dom.Node)
method of org.apache.axis.message.NodeImpl in such a way that it breaks the contract of the
org.3c.dom.Node.appendChild(org.w3c.dom.Node) interface.
> Here's the implementation of appendChild(Node) in SOAPHeader:
> 390    public Node appendChild(Node newChild) throws DOMException {
> 391        SOAPHeaderElement headerElement = null;
> 392        if(newChild instanceof SOAPHeaderElement)
> 393            headerElement = (SOAPHeaderElement)newChild;
> 394        else 
> 395            headerElement = new SOAPHeaderElement((Element)newChild);
> 396        try {
> 397            addChildElement(headerElement);
> 398        } catch (SOAPException e) {
> 399            throw new DOMException(DOMException.INVALID_STATE_ERR,e.toString());
> 400        }
> 401        return headerElement;
> 402    }
> This works fine if the newChild Node parameter is an instance of SOAPHeaderElement or
org.w3c.dom.Element, but any other subclass of Node will cause a ClassCastException to be
thrown at line 395.
> It's reasonable to expect that in most cases, the Node being appended to a SOAP Header
will be DOM Element representing a header entry. However, there is no prohibition in the SOAP
1.1 Note or the SOAP 1.2 Recommendation against whitespace before, after, or in between the
header entries of a SOAP Header. Some parsers will render such whitespace as Text nodes, which
will cause a ClassCastException in the appendChild() method.
> Even if a deliberate design decision has been made not to support whitespace in the SOAPHeader
class, the appendChild(Node) method should probably do something more elegant than throw a
ClassCastException if the Node parameter is a Text node containing whitespace.

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