SAXCheck.java Source code

Introduction

Here is the source code for SAXCheck.java

Source

//Example XML document
/*  An XML Document
    
<?xml version="1.0" standalone="yes"?>
<person>
 <name>Joe Wang</name>
 <phone type="home">306 555-9999</phone>
 <email>joe@yoursite.net;</email>
</person>
    
    
*/

import java.io.IOException;

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

import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;

public class SAXCheck {
    static public void main(String[] arg) {
        String filename = null;
        boolean validate = false;

        if (arg.length == 1) {
            filename = arg[0];
        } else if (arg.length == 2) {
            if (!arg[0].equals("-v"))
                usage();
            validate = true;
            filename = arg[1];
        } else {
            usage();
        }

        // Create a new factory to create parsers that will
        // validate or not, according to the flag setting.
        SAXParserFactory spf = SAXParserFactory.newInstance();
        spf.setValidating(validate);

        // Create the XMLReader to be used to check for errors.
        XMLReader reader = null;
        try {
            SAXParser parser = spf.newSAXParser();
            reader = parser.getXMLReader();
        } catch (Exception e) {
            System.err.println(e);
            System.exit(1);
        }

        // Install an error handler in the reader.
        reader.setErrorHandler(new MyErrorHandler());
        // Use the XMLReader to parse the entire file.
        try {
            InputSource is = new InputSource(filename);
            reader.parse(is);
        } catch (SAXException e) {
            System.exit(1);
        } catch (IOException e) {
            System.err.println(e);
            System.exit(1);
        }
    }

    private static void usage() {
        System.err.println("Usage: SAXCheck [-v] <filename>");
        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());
    }
}