Source Code : Duplicates XML Files

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Duplicates XML Files

      
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;

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 SAXCopy {
  static public void main(String[] arg) {
    String infilename = null;
    String outfilename = null;
    if (arg.length == 2) {
      infilename = arg[0];
      outfilename = arg[1];
    } else {
      usage();
    }

    try {
      SAXParserFactory spf = SAXParserFactory.newInstance();
      SAXParser parser = spf.newSAXParser();
      XMLReader reader = parser.getXMLReader();
      reader.setErrorHandler(new MyErrorHandler());
      FileOutputStream fos = new FileOutputStream(outfilename);
      PrintWriter out = new PrintWriter(fos);
      MyCopyHandler duper = new MyCopyHandler(out);
      reader.setContentHandler(duper);
      InputSource is = new InputSource(infilename);
      reader.parse(is);
      out.close();
    } catch (SAXException e) {
      System.exit(1);
    } catch (ParserConfigurationException e) {
      System.err.println(e);
      System.exit(1);
    } catch (IOException e) {
      System.err.println(e);
      System.exit(1);
    }
  }

  private static void usage() {
    System.err.println("Usage: SAXCopy <infile> <outfile>");
    System.exit(1);
  }
}

class MyCopyHandler implements ContentHandler {
  private boolean namespaceBegin = false;

  private String currentNamespace;

  private String currentNamespaceUri;

  private Locator locator;

  private PrintWriter out;

  public MyCopyHandler(PrintWriter out) {
    this.out = out;
  }

  public void setDocumentLocator(Locator locator) {
    this.locator = locator;
  }

  public void startDocument() {
    out.println("<?xml version="1.0"?>");
    out.println();
  }

  public void endDocument() {
  }

  public void startPrefixMapping(String prefix, String uri) {
    namespaceBegin = true;
    currentNamespace = prefix;
    currentNamespaceUri = uri;
  }

  public void endPrefixMapping(String prefix) {
  }

  public void startElement(String namespaceURI, String localName,
      String qName, Attributes atts) {
    out.print("<" + qName);
    if (namespaceBegin) {
      out.print(" xmlns:" + currentNamespace + "=""
          + currentNamespaceUri + """);
      namespaceBegin = false;
    }
    for (int i = 0; i < atts.getLength(); i++) {
      out.print(" " + atts.getQName(i) + "=\" + atts.getValue(i) + """);
    }
    out.print(">");
  }

  public void endElement(String namespaceURI, String localName, String qName) {
    out.print("</" + qName + ">");
  }

  public void characters(char[] ch, int start, int length) {
    for (int i = start; i < start + length; i++)
      out.print(ch[i]);
  }

  public void ignorableWhitespace(char[] ch, int start, int length) {
    for (int i = start; i < start + length; i++)
      out.print(ch[i]);
  }

  public void processingInstruction(String target, String data) {
    out.print("<?" + target + " " + data + "?>");
  }

  public void skippedEntity(String name) {
    out.print("&" + name + ";");
  }
}

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());
  }
}

//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>


*/

           
         
    
    
    
    
    
  

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