import org.jdom.*; import org.jdom.input.SAXBuilder; import java.util.*; public class XCount { public static void main(String[] args) { if (args.length == 0) { System.out.println("Usage: java XCount URL1 URL2..."); } SAXBuilder builder = new SAXBuilder(); System.out.println( "File\tElements\tAttributes\tComments\tProcessing Instructions\tCharacters"); // start parsing... for (int i = 0; i < args.length; i++) { // command line should offer URIs or file names try { Document doc = builder.build(args[i]); System.out.print(args[i] + ":\t"); String result = count(doc); System.out.println(result); } catch (JDOMException e) { // indicates a well-formedness or other error System.out.println(args[i] + " is not a well formed XML document."); System.out.println(e.getMessage()); } } } private static int numCharacters = 0; private static int numComments = 0; private static int numElements = 0; private static int numAttributes = 0; private static int numProcessingInstructions = 0; public static String count(Document doc) { numCharacters = 0; numComments = 0; numElements = 0; numAttributes = 0; numProcessingInstructions = 0; List children = doc.getMixedContent(); Iterator iterator = children.iterator(); while (iterator.hasNext()) { Object o = iterator.next(); if (o instanceof Element) { numElements++; count((Element) o); } else if (o instanceof Comment) numComments++; else if (o instanceof ProcessingInstruction) numProcessingInstructions++; } String result = numElements + "\t" + numAttributes + "\t" + numComments + "\t" + numProcessingInstructions + "\t" + numCharacters; return result; } public static void count(Element element) { List attributes = element.getAttributes(); numAttributes += attributes.size(); List children = element.getMixedContent(); Iterator iterator = children.iterator(); while (iterator.hasNext()) { Object o = iterator.next(); if (o instanceof Element) { numElements++; count((Element) o); } else if (o instanceof Comment) numComments++; else if (o instanceof ProcessingInstruction) numProcessingInstructions++; else if (o instanceof String) { String s = (String) o; numCharacters += s.length(); } } } }