import org.xml.sax.*;
import org.xml.sax.helpers.*;
import java.io.IOException;

public class DocumentStatistics {

  public static void main(String[] args) {
    
    XMLReader parser;
    try {
     parser = XMLReaderFactory.createXMLReader();
    }
    catch (SAXException e) {
      // fall back on Xerces parser by name
      try {
        parser = XMLReaderFactory.createXMLReader(
         "org.apache.xerces.parsers.SAXParser");
      }
      catch (SAXException ee) {
        System.err.println("Couldn't locate a SAX parser");
        return;          
      }
    }
     
    if (args.length == 0) {
      System.out.println(
       "Usage: java DocumentStatistics URL1 URL2..."); 
    } 
      
    // Install the Content Handler      
    parser.setContentHandler(new XMLCounter());
    
    // start parsing...
    for (int i = 0; i < args.length; i++) {
      
      // command line should offer URIs or file names
      try {
        parser.parse(args[i]);
      }
      catch (SAXParseException e) { // well-formedness error
        System.out.println(args[i] + " is not well formed.");
        System.out.println(e.getMessage()
         + " at line " + e.getLineNumber() 
         + ", column " + e.getColumnNumber());
      }
      catch (SAXException e) { // some other kind of error
        System.out.println(e.getMessage());
      }
      catch (IOException e) {
        System.out.println("Could not report on " + args[i] 
         + " because of the IOException " + e);
      }
      
    }  
  
  }

}