9.5 The XML Context View

Each node implements the Node interface and a type-specific subinterface.
The Node interface offers the method
- short getNodeType()
for retrieving the XML context associated with the nodes of the underlying structures of the documents.

For each node type, an extension of the Node interface is offered for representing the node context within the XML documents.

DOCUMENT_NODE	Document
ELEMENT_NODE	Element
ATTRIBUTE_NODE	Attr
TEXT_NODE	CharacterData
ENTITY_NODE	Entity
ENTITY_REFERENCE_NODE	EntityReference
NOTATION_NODE	Notation
COMMENT_NODE	Comment
PROCESSING_INSTRUCTION_NODE	ProcessingInstruction
CDATA_SECTION_NODE	CDATASection
DOCUMENT_TYPE_NODE	DocumentType (DTD)
DOCUMENT_FRAGMENT_NODE	DocumentFragment

<..visit xml context node ..>

switch( node.getNodeType() ){
   case   Node.DOCUMENT_NODE: visit((Document) node); break;
   case    Node.ELEMENT_NODE: visit((Element) node);  break;
   case  Node.ATTRIBUTE_NODE: visit((Attr) node);     break;
   default:;
}

-_-_-

<..the visit methods ..>

void visit(Document node){
   System.out.println( "The root" ); }
void visit(Element node){
   System.out.println( "Element:  " + node.getTagName() ); }
void visit(Attr node){
   System.out.println( "Attr:  " + node.getName() ); }

-_-_-

<?xml version="1.0" encoding="UTF-8"?>
<article xmlns="x:y" attr="ignored">
  <section>
    A & B
  </section>
</article>

The root
Element:  article
Attr:  xmlns
Attr:  attr
Element:  section

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