src/de/j32/util/SimpleXmlGenerator.java

   1 package de.j32.util;
   2
   3 import java.io.OutputStream;
   4 import java.io.OutputStreamWriter;
   5 import java.io.UnsupportedEncodingException;
   6 import java.util.Stack;
   7
   8 import javax.xml.transform.OutputKeys;
   9 import javax.xml.transform.Transformer;
  10 import javax.xml.transform.TransformerConfigurationException;
  11 import javax.xml.transform.TransformerFactoryConfigurationError;
  12 import javax.xml.transform.sax.SAXTransformerFactory;
  13 import javax.xml.transform.sax.TransformerHandler;
  14 import javax.xml.transform.stream.StreamResult;
  15
  16 import org.xml.sax.SAXException;
  17 import org.xml.sax.helpers.AttributesImpl;
  18
  19 public class SimpleXmlGenerator
  20 {
  21     TransformerHandler handler_;
  22     Stack<String> openElements_ = new Stack<String>();
  23
  24     public SimpleXmlGenerator(OutputStream os, String encoding)
  25             throws UnsupportedEncodingException
  26     {
  27         SAXTransformerFactory factory = (SAXTransformerFactory) SAXTransformerFactory
  28                 .newInstance();
  29         // factory.setAttribute("indent-number", new Integer(2));
  30         try {
  31             handler_ = factory.newTransformerHandler();
  32         }
  33         catch (TransformerConfigurationException e) {
  34             throw new AssertionError("XML/SAX transformer configuration error");
  35         }
  36         catch (TransformerFactoryConfigurationError e) {
  37             throw new AssertionError(
  38                     "XML/SAX transformer factory configuration error");
  39         }
  40         Transformer tf = handler_.getTransformer();
  41         tf.setOutputProperty(OutputKeys.ENCODING, encoding);
  42         // if (doctype != null)
  43         // tf.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM,doctype);
  44         // tf.setOutputProperty(OutputKeys.INDENT,indent ? "yes" : "no");
  45         handler_.setResult(new StreamResult(
  46                 new OutputStreamWriter(os, encoding)));
  47     }
  48
  49     public void startDocument() throws SAXException
  50     {
  51         handler_.startDocument();
  52     }
  53
  54     public void start(String name) throws SAXException
  55     {
  56         handler_.startElement("", "", name, null);
  57         openElements_.add(name);
  58     }
  59
  60     public static class Attributes
  61     {
  62         AttributesImpl attributes_ = new AttributesImpl();
  63
  64         public Attributes attribute(String name, String value)
  65         {
  66             attributes_.addAttribute("", "", name, "CDATA", value);
  67             return this;
  68         }
  69
  70         AttributesImpl getAttributes()
  71         {
  72             return attributes_;
  73         }
  74
  75         Attributes()
  76         {}
  77     }
  78
  79     public Attributes attribute(String name, String value)
  80     {
  81         Attributes a = new Attributes();
  82         return a.attribute(name, value);
  83     }
  84
  85     public void start(String name, Attributes attrs) throws SAXException
  86     {
  87         handler_.startElement("", "", name, attrs.getAttributes());
  88         openElements_.push(name);
  89     }
  90
  91     public void end() throws SAXException
  92     {
  93         handler_.endElement("", "", openElements_.pop());
  94     }
  95
  96     public void empty(String name) throws SAXException
  97     {
  98         start(name);
  99         end();
 100     }
 101
 102     public void empty(String name, Attributes attrs) throws SAXException
 103     {
 104         start(name, attrs);
 105         end();
 106     }
 107
 108     public void text(String text) throws SAXException
 109     {
 110         handler_.characters(text.toCharArray(), 0, text.length());
 111     }
 112
 113     public void nl() throws SAXException
 114     {
 115         text("\n");
 116     }
 117
 118     public void endDocument() throws SAXException
 119     {
 120         handler_.endDocument();
 121     }
 122 }