Examples of org.w3c.dom.Attr

org.w3c.dom.Attr
The Attr interface represents an attribute in an Element object. Typically the allowable values for the attribute are defined in a document type definition.
Attr objects inherit the Node interface, but since they are not actually child nodes of the element they describe, the DOM does not consider them part of the document tree. Thus, the Node attributes parentNode , previousSibling , and nextSibling have a null value for Attr objects. The DOM takes the view that attributes are properties of elements rather than having a separate identity from the elements they are associated with; this should make it more efficient to implement such features as default attributes associated with all elements of a given type. Furthermore, Attr nodes may not be immediate children of a DocumentFragment . However, they can be associated with Element nodes contained within a DocumentFragment . In short, users and implementors of the DOM need to be aware that Attr nodes have some things in common with other objects inheriting the Node interface, but they also are quite distinct.
The attribute's effective value is determined as follows: if this attribute has been explicitly assigned any value, that value is the attribute's effective value; otherwise, if there is a declaration for this attribute, and that declaration includes a default value, then that default value is the attribute's effective value; otherwise, the attribute does not exist on this element in the structure model until it has been explicitly added. Note that the nodeValue attribute on the Attr instance can also be used to retrieve the string version of the attribute's value(s).
In XML, where the value of an attribute can contain entity references, the child nodes of the Attr node provide a representation in which entity references are not expanded. These child nodes may be either Text or EntityReference nodes. Because the attribute type may be unknown, there are no tokenized attribute values.

    public String getDefaultNamespaceURI() {
        if (defaultNamespace == null) {
            Node aNode = node;
            while (aNode != null) {
                if (aNode.getNodeType() == Node.ELEMENT_NODE) {
                    Attr attr = ((Element) aNode).getAttributeNode("xmlns");
                    if (attr != null) {
                        defaultNamespace = attr.getValue();
                        break;
                    }
                }
                aNode = aNode.getParentNode();
            }

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        attributes = new ArrayList();
        Node node = (Node) parent.getNode();
        if (node.getNodeType() == Node.ELEMENT_NODE) {
            String lname = name.getName();
            if (!lname.equals("*")) {
                Attr attr = getAttribute((Element) node, name);
                if (attr != null) {
                    attributes.add(attr);
                }
            }
            else {
                NamedNodeMap map = node.getAttributes();
                int count = map.getLength();
                for (int i = 0; i < count; i++) {
                    Attr attr = (Attr) map.item(i);
                    if (testAttr(attr, name)) {
                        attributes.add(attr);
                    }
                }
            }

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        if (testPrefix != null) {
            testNS = parent.getNamespaceURI(testPrefix);
        }


        if (testNS != null) {
            Attr attr = element.getAttributeNodeNS(testNS, name.getName());
            if (attr != null) {
                return attr;
            }


            // This may mean that the parser does not support NS for

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        }
        if (node.getNodeType() == Node.ELEMENT_NODE) {
            NamedNodeMap map = node.getAttributes();
            int count = map.getLength();
            for (int i = 0; i < count; i++) {
                Attr attr = (Attr) map.item(i);
                String prefix = DOMNodePointer.getPrefix(attr);
                String name = DOMNodePointer.getLocalName(attr);
                if ((prefix != null && prefix.equals("xmlns"))
                    || (prefix == null && name.equals("xmlns"))) {
                    attributes.add(attr);

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        int index = position - 1;
        if (index < 0) {
            index = 0;
        }
        String prefix = "";
        Attr attr = (Attr) attributes.get(index);
        String name = attr.getPrefix();
        if (name != null && name.equals("xmlns")) {
            prefix = DOMNodePointer.getLocalName(attr);
        }
        return new NamespacePointer(parent, prefix, attr.getValue());
    }

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                Element cloneNode = (Element)ProcessorUtil.cloneNode(schemaNode.getOwnerDocument(), 
                                                                     childEl, true);
                
                NamedNodeMap atts = cloneNode.getAttributes();
                for (int x = 0; x < atts.getLength(); x++) {
                    Attr attr = (Attr)atts.item(x);
                    if (ToolConstants.NS_JAXB_BINDINGS.equals(attr.getNamespaceURI())) {
                        cloneNode.removeAttributeNode(attr);
                        atts = cloneNode.getAttributes();
                        x = -1;
                    }
                }

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            if (el.getParentNode() != null) {
                copyJaxbAttributes(el.getParentNode(), schemaNode);
            }
            NamedNodeMap atts = el.getAttributes();
            for (int x = 0; x < atts.getLength(); x++) {
                Attr attr = (Attr)atts.item(x);
                if (ToolConstants.NS_JAXB_BINDINGS.equals(attr.getNamespaceURI())) { 
                    Attr attrnew = schemaNode.getOwnerDocument().createAttributeNS(attr.getNamespaceURI(), 
                                                                                attr.getName());
                    attrnew.setValue(attr.getValue());
                    schemaNode.setAttributeNodeNS(attrnew);
                    
                    if ("extensionBindingPrefixes".equals(attr.getLocalName())) {
                        String pfxs = attr.getValue();
                        while (pfxs.length() > 0) {

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    public static void circumventBug2650(Document doc) {


        Element documentElement = doc.getDocumentElement();


        // if the document element has no xmlns definition, we add xmlns=""
        Attr xmlnsAttr =
            documentElement.getAttributeNodeNS(Constants.NamespaceSpecNS, "xmlns");


        if (xmlnsAttr == null) {
            documentElement.setAttributeNS(Constants.NamespaceSpecNS, "xmlns", "");
        }

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                            continue;
                        }
                        Element childElement = (Element) child;


                        for (int i = 0; i < attributesLength; i++) {
                            Attr currentAttr = (Attr) attributes.item(i); 
                            if (!namespaceNs.equals(currentAttr.getNamespaceURI())) {
                                continue;
                            }
                            if (childElement.hasAttributeNS(namespaceNs, 
                                                            currentAttr.getLocalName())) {
                                continue;
                            }
                            childElement.setAttributeNS(namespaceNs,
                                                        currentAttr.getName(),
                                                        currentAttr.getNodeValue());                   
                        }
                    }            
                }
            case Node.ENTITY_REFERENCE_NODE :
            case Node.DOCUMENT_NODE :

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     * @param elem the element containing the attribute
     * @param name the name of the attribute
     * @return the attribute value (may be null if unspecified)
     */
    public static String getAttributeValue(Element elem, String name) {
        Attr attr = elem.getAttributeNodeNS(null, name);
        return (attr == null) ? null : attr.getValue();
    }

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