import java.io.FileReader;

import java.io.IOException;

import java.io.File;

import java.util.Map;

import java.util.HashMap;

import org.xml.sax.XMLReader;

import org.xml.sax.Attributes;

import org.xml.sax.InputSource;

import org.xml.sax.Locator;

import org.xml.sax.SAXException;

import org.xml.sax.SAXParseException;

import org.xml.sax.helpers.XMLReaderFactory;

import org.xml.sax.ext.DefaultHandler2;

public class SAXDemo{

public static void main(String[] args) throws SAXException, IOException{

if(args.length<1 || args.length>2){

System.err.println("usage: java SAXDemo xmlFile [v]");

return;

}

XMLReader xmlr = XMLReaderFactory.createXMLReader();

if(args.length==2 && args[1].equalsIgnoreCase("v")){

xmlr.setFeature("http://xml.org/sax/features/validation", true);

}

xmlr.setFeature("http://xml.org/sax/features/namespace-prefixes", true);

Handler handler = new Handler();

xmlr.setContentHandler(handler);

xmlr.setDTDHandler(handler);

xmlr.setEntityResolver(handler);

xmlr.setErrorHandler(handler);

xmlr.setProperty("http://xml.org/sax/properties/lexical-handler", handler);

xmlr.parse(new InputSource(new FileReader(args[0])));

}

}

class Handler extends DefaultHandler2{

private Locator locator;

private Map<String, String> dtdMapping;

Handler(){

super();

// Improve the entity resolve efficiency through local dtd resource.

File file = new File("recipeml.dtd");

if(file.exists()&&file.isFile()){

dtdMapping = new HashMap<String, String>();

dtdMapping.put("-//FormatData//DTD RecipeML 0.5//EN", "recipeml.dtd");

// the DTD file is in current directory

}

}

@Override

public void characters(char[] ch, int start, int length){

System.out.print("characters() [");

for(int i=start;i<start + length;i++){

System.out.print(ch[i]);

}

System.out.println("]");

}

@Override

public void comment(char[] ch, int start, int length){

System.out.print("comment() [");

for(int i=start;i<start + length;i++){

System.out.print(ch[i]);

}

System.out.println("]");

}

@Override

public void endCDATA(){

System.out.println("endCDATA()");

}

@Override

public void endDocument(){

System.out.println("endDocument()");

}

@Override

public void endDTD(){

System.out.println("endDTD()");

}

@Override

public void endElement(String uri, String localName, String qName){

System.out.print("endElement() ");

System.out.print("uri=" + uri);

System.out.print(", localName=" + localName);

System.out.println(", qName=" + qName);

}

@Override

public void endEntity(String name){

System.out.printf("endEntity() name=%s%n", name);

}

@Override

public void endPrefixMapping(String prefix){

System.out.printf("endPrefixMapping() prefix=%s%n", prefix);

}

@Override

public void error(SAXParseException saxpe){

System.out.println("error() " + saxpe);

}

@Override

public void fatalError(SAXParseException saxpe){

System.out.println("fatalError() " + saxpe);

}

@Override

public void ignorableWhitespace(char[] ch, int start, int length){

System.out.print("ignorableWhitespace() [");

for(int i=start;i<start + length;i++){

System.out.print(ch[i]);

}

System.out.println("]");

}

@Override

public void notationDecl(String name, String publicId, String systemId){

System.out.printf("notationDecl() name=%1$s, publicId=%2$s, systemId=%3$s%n", name, publicId, systemId);

}

@Override

public void processingInstruction(String target, String data){

System.out.printf("processingInstruction() target=%1$s, data=%2$s%n",

target, data);

}

@Override

public InputSource resolveEntity(String publicId, String systemId){

System.out.printf("resolveEntity() publicId=%1$s, systemId=%2$s%n",

publicId, systemId);

// Do not perform a remapping.

InputSource is = new InputSource();

is.setPublicId(publicId);

if(dtdMapping!=null&&dtdMapping.containsKey(publicId)){

is.setSystemId(dtdMapping.get(publicId));

System.out.println("obtaining cached local recipeml.dtd");

}else{

is.setSystemId(systemId);

}

return is;

// if you return null here, it's equavilent to request the parser to use system identifier.

}

@Override

public void setDocumentLocator(Locator locator){

this.locator = locator;

System.out.println("setDocumentLocator() locator=" + locator);

}

@Override

public void skippedEntity(String name){

System.out.println("skippedEntity() name=" + name);

}

@Override

public void startCDATA(){

System.out.println("startCDATA()");

}

@Override

public void startDocument(){

System.out.println("startDocument()");

}

@Override

public void startDTD(String name, String publicId, String systemId){

System.out.printf("startDTD() name=%1$s, publicId=%2$s, systemID=%3$s%n",

name, publicId, systemId);

}

@Override

public void startElement(String uri, String localName, String qName, Attributes attributes){

System.out.print("startElement() uri=" + uri);

System.out.print(", localName=" + localName);

System.out.println(", qName=" + qName);

for(int i=0;i<attributes.getLength();i++){

System.out.println("Attribute: " + attributes.getLocalName(i) + ", " + attributes.getValue(i));

}

// Explores the position of the element start.

System.out.println("Column number=" + locator.getColumnNumber() + ", line number=" + locator.getLineNumber());

}

@Override

public void startEntity(String name){

System.out.println("startEntity() name=" + name);

}

@Override

public void startPrefixMapping(String prefix, String uri){

System.out.printf("startPrefixMapping() prefix=%1$s, uri=%2$s%n", prefix, uri);

}

@Override

public void unparsedEntityDecl(String name, String publicId, String systemId, String notationName){

System.out.printf("unparsedEntityDecl() name=%1$s, publicId=%2$s, systemId=%3$s, notationName=%4$s%n");

}

@Override

public void warning(SAXParseException saxpe){

System.out.println("warning() " + saxpe);

}

}