Oracle8i Application Developer's Guide - XML Release 3 (8.1.7) Part Number A86030-01 |
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Using XML Parser for Java, 10 of 22
Using the SAXNamespace() class is illustrated in the following example:
// This file demonstrates a simple use of the Namespace extensions to // the SAX APIs. import org.xml.sax.*; import java.io.*; import java.net.URL; import java.net.MalformedURLException; // Extensions to the SAX Interfaces for Namespace support. import oracle.xml.parser.v2.XMLDocumentHandler; import oracle.xml.parser.v2.DefaultXMLDocumentHandler; import oracle.xml.parser.v2.NSName; import oracle.xml.parser.v2.SAXAttrList; import oracle.xml.parser.v2.SAXParser; public class SAXNamespace { static public void main(String[] args) { String fileName; //Get the file name if (args.length == 0) { System.err.println("No file Specified!!!"); System.err.println("USAGE: java SAXNamespace <filename>"); return; } else { fileName = args[0]; } try { // Create handlers for the parser // Use the XMLDocumentHandler interface for namespace support // instead of org.xml.sax.DocumentHandler XMLDocumentHandler xmlDocHandler = new XMLDocumentHandlerImpl(); // For all the other interface use the default provided by // Handler base HandlerBase defHandler = new HandlerBase(); // Get an instance of the parser SAXParser parser = new SAXParser(); // Set Handlers in the parser // Set the DocumentHandler to XMLDocumentHandler parser.setDocumentHandler(xmlDocHandler); // Set the other Handler to the defHandler parser.setErrorHandler(defHandler); parser.setEntityResolver(defHandler); parser.setDTDHandler(defHandler); try { parser.parse(fileToURL(new File(fileName)).toString()); } catch (SAXParseException e) { System.err.println(args[0] + ": " + e.getMessage()); } catch (SAXException e) { System.err.println(args[0] + ": " + e.getMessage()); } } catch (Exception e) { System.err.println(e.toString()); } } static public URL fileToURL(File file) { String path = file.getAbsolutePath(); String fSep = System.getProperty("file.separator"); if (fSep != null && fSep.length() == 1) path = path.replace(fSep.charAt(0), '/'); if (path.length() > 0 && path.charAt(0) != '/') path = '/' + path; try { return new URL("file", null, path); } catch (java.net.MalformedURLException e) { /* According to the spec this could only happen if the file protocol were not recognized. */ throw new Error("unexpected MalformedURLException"); } } private SAXNamespace() throws IOException { } } /*********************************************************************** Implementation of XMLDocumentHandler interface. Only the new startElement and endElement interfaces are implemented here. All other interfaces are implemented in the class HandlerBase. **********************************************************************/ class XMLDocumentHandlerImpl extends DefaultXMLDocumentHandler { public void XMLDocumentHandlerImpl() { } public void startElement(NSName name, SAXAttrList atts) throws SAXException { // Use the methods getQualifiedName(), getLocalName(), getNamespace() // and getExpandedName() in NSName interface to get Namespace // information. String qName; String localName; String nsName; String expName; qName = name.getQualifiedName(); System.out.println("ELEMENT Qualified Name:" + qName); localName = name.getLocalName(); System.out.println("ELEMENT Local Name :" + localName); nsName = name.getNamespace(); System.out.println("ELEMENT Namespace :" + nsName); expName = name.getExpandedName(); System.out.println("ELEMENT Expanded Name :" + expName); for (int i=0; i<atts.getLength(); i++) { // Use the methods getQualifiedName(), getLocalName(), getNamespace() // and getExpandedName() in SAXAttrList interface to get Namespace // information. qName = atts.getQualifiedName(i); localName = atts.getLocalName(i); nsName = atts.getNamespace(i); expName = atts.getExpandedName(i); System.out.println(" ATTRIBUTE Qualified Name :" + qName); System.out.println(" ATTRIBUTE Local Name :" + localName); System.out.println(" ATTRIBUTE Namespace :" + nsName); System.out.println(" ATTRIBUTE Expanded Name :" + expName); // You can get the type and value of the attributes either // by index or by the Qualified Name. String type = atts.getType(qName); String value = atts.getValue(qName); System.out.println(" ATTRIBUTE Type :" + type); System.out.println(" ATTRIBUTE Value :" + value); System.out.println(); } } public void endElement(NSName name) throws SAXException { // Use the methods getQualifiedName(), getLocalName(), getNamespace() // and getExpandedName() in NSName interface to get Namespace // information. String expName = name.getExpandedName(); System.out.println("ELEMENT Expanded Name :" + expName); } }
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