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From Brian Agnew <br...@oopsconsultancy.com>
Subject Re: <xmlproperty> intra-element attribute property resolution issue
Date Mon, 22 Jan 2007 11:52:54 GMT
Hi -

I don't believe there's any concept of attribute ordering in XML (and 
hence in any DOM implementation). See http://www.w3.org/TR/REC-xml/, 
section 3.1

Brian

Steve Loughran wrote:
> Jacob,
>
> I've been looking at teh xmlproperty source. The order the task works 
> through attrs is driven by the order it comes from the DOM in 
> node.getAttributes():
>
>
>      if (node.hasAttributes()) {
>
>             NamedNodeMap nodeAttributes = node.getAttributes();
>
>             // Is there an id attribute?
>             Node idNode = nodeAttributes.getNamedItem(ID);
>             id = (semanticAttributes && idNode != null
>                   ? idNode.getNodeValue() : null);
>
>             // Now, iterate through the attributes adding them.
>             for (int i = 0; i < nodeAttributes.getLength(); i++) {
>
>                 Node attributeNode = nodeAttributes.item(i);
>
>                 if (!semanticAttributes) {
>                     String attributeName = 
> getAttributeName(attributeNode);
>                     String attributeValue = 
> getAttributeValue(attributeNode);
>                     addProperty(prefix + attributeName, 
> attributeValue, null);
>                 } else {
>
>                     String nodeName = attributeNode.getNodeName();
>                     String attributeValue = 
> getAttributeValue(attributeNode);
>
>
> Being an XML person, perhaps you can answer some details that are not 
> in the javadocs.
>
> 1. What is the ordering in node.getAttributes() according to the 
> normative DOM specification?
>
> 2. If we want attributes in declaration order, how do we do it? Go 
> through all child nodes and only pick up things that are in the right 
> order.
>
> 3. Does the same ordering appear when running Ant with the older 
> version of Xerces?
>
> XmlProperty is all dom based. If we cannot get stuff except in alpha 
> order, then we are going to have to live with it and document the fact.
>
> -Steve
>
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-- 
Brian Agnew                  http://www.oopsconsultancy.com
OOPS Consultancy Ltd         brian @ oopsconsultancy.com
Tel: +44 (0)7720 397526
Fax: +44 (0)20 8682 0012



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