MappingContentHandler.java Source code

Introduction

Here is the source code for MappingContentHandler.java

Source

/*
Code revised from
Java, XML, and JAXP by Arthur Griffith John Wiley & Sons 2002
    
*/

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Vector;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;

public class MappingContentHandler {
    static public void main(String[] arg) {
        try {
            SAXParserFactory spf = SAXParserFactory.newInstance();
            SAXParser parser = spf.newSAXParser();
            XMLReader reader = parser.getXMLReader();
            reader.setErrorHandler(new MyErrorHandler());
            MyTextHandler duper = new MyTextHandler();
            reader.setContentHandler(duper);
            InputSource is = new InputSource("person.xml");
            reader.parse(is);
        } catch (SAXException e) {
            System.out.println(e);
        } catch (ParserConfigurationException e) {
            System.err.println(e);
            System.exit(1);
        } catch (IOException e) {
            System.err.println(e);
            System.exit(1);
        }
    }
}

class MyErrorHandler implements ErrorHandler {
    public void warning(SAXParseException e) throws SAXException {
        show("Warning", e);
        throw (e);
    }

    public void error(SAXParseException e) throws SAXException {
        show("Error", e);
        throw (e);
    }

    public void fatalError(SAXParseException e) throws SAXException {
        show("Fatal Error", e);
        throw (e);
    }

    private void show(String type, SAXParseException e) {
        System.out.println(type + ": " + e.getMessage());
        System.out.println("Line " + e.getLineNumber() + " Column " + e.getColumnNumber());
        System.out.println("System ID: " + e.getSystemId());
    }
}

class MyTextHandler implements ContentHandler {
    private boolean insideNameElement = false;
    private boolean insidePhoneElement = false;
    private boolean insideEmailElement = false;
    private Person person;
    private Vector<Person> personVec;

    public MyTextHandler() {
        personVec = new Vector<Person>();
    }

    public void setDocumentLocator(Locator locator) {
    }

    public void startDocument() {
    }

    public void endDocument() {
        for (int i = 0; i < personVec.size(); i++) {
            Person p = (Person) personVec.elementAt(i);
            System.out.println(p.getName() + " " + p.getPhone() + " " + p.getEmail());
        }
    }

    public void startPrefixMapping(String prefix, String uri) {
    }

    public void endPrefixMapping(String prefix) {
    }

    public void startElement(String namespaceURI, String localName, String qName, Attributes atts) {
        if (qName.equals("person")) {
            person = new Person();
        } else if (qName.equals("name")) {
            insideNameElement = true;
        } else if (qName.equals("phone")) {
            insidePhoneElement = true;
        } else if (qName.equals("email")) {
            insideEmailElement = true;
        }
    }

    public void endElement(String namespaceURI, String localName, String qName) {
        if (qName.equals("person")) {
            if (person != null) {
                personVec.addElement(person);
            }
        } else if (qName.equals("name")) {
            insideNameElement = false;
        } else if (qName.equals("phone")) {
            insidePhoneElement = false;
        } else if (qName.equals("email")) {
            insideEmailElement = false;
        }
    }

    public void characters(char[] ch, int start, int length) {
        String str = "";
        for (int i = start; i < start + length; i++)
            str += ch[i];
        if (insideNameElement)
            person.setName(str);
        else if (insidePhoneElement)
            person.setPhone(str);
        else if (insideEmailElement)
            person.setEmail(str);
    }

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

    public void processingInstruction(String target, String data) {
    }

    public void skippedEntity(String name) {
    }

}

class Person {
    private String name = null;
    private String phone = null;
    private String email = null;

    public void setName(String value) {
        name = value;
    }

    public void setPhone(String value) {
        phone = value;
    }

    public void setEmail(String value) {
        email = value;
    }

    public String getName() {
        if (name == null)
            return ("none");
        return (name);
    }

    public String getPhone() {
        if (phone == null)
            return ("none");
        return (phone);
    }

    public String getEmail() {
        if (email == null)
            return ("none");
        return (email);
    }
}