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.newInstance();
  28                 // factory.setAttribute("indent-number", new Integer(2));
  29                 try {
  30                         handler_ = factory.newTransformerHandler();
  31                 }
  32                 catch (TransformerConfigurationException e) {
  33                         throw new AssertionError("XML/SAX transformer configuration error");
  34                 }
  35                 catch (TransformerFactoryConfigurationError e) {
  36                         throw new AssertionError("XML/SAX transformer factory configuration error");
  37                 }
  38                 Transformer tf = handler_.getTransformer();
  39                 tf.setOutputProperty(OutputKeys.ENCODING,encoding);
  40                 // if (doctype != null)
  41                 //        tf.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM,doctype);
  42                 // tf.setOutputProperty(OutputKeys.INDENT,indent ? "yes" : "no");
  43                 handler_.setResult(new StreamResult(new OutputStreamWriter(os, encoding)));
  44         }
  45
  46         public void startDocument()
  47                 throws SAXException
  48         {
  49                 handler_.startDocument();
  50         }
  51
  52         public void start(String name)
  53                 throws SAXException
  54         {
  55                 handler_.startElement("","",name,null);
  56                 openElements_.add(name);
  57         }
  58
  59         public static class Attributes
  60         {
  61                 AttributesImpl attributes_ = new AttributesImpl();
  62
  63                 public Attributes attribute(String name, String value)
  64                 {
  65                         attributes_.addAttribute("","",name,"CDATA",value);
  66                         return this;
  67                 }
  68
  69                 AttributesImpl getAttributes()
  70                 {
  71                         return attributes_;
  72                 }
  73
  74                 Attributes() {}
  75         }
  76
  77         public Attributes attribute(String name, String value)
  78         {
  79                 Attributes a = new Attributes();
  80                 return a.attribute(name, value);
  81         }
  82
  83         public void start(String name, Attributes attrs)
  84                 throws SAXException
  85         {
  86                 handler_.startElement("","",name, attrs.getAttributes());
  87                 openElements_.push(name);
  88         }
  89
  90         public void end()
  91                 throws SAXException
  92         {
  93                 handler_.endElement("","",openElements_.pop());
  94         }
  95
  96         public void empty(String name)
  97                 throws SAXException
  98         {
  99                 start(name);
 100                 end();
 101         }
 102
 103         public void empty(String name, Attributes attrs)
 104                 throws SAXException
 105         {
 106                 start(name, attrs);
 107                 end();
 108         }
 109
 110         public void text(String text)
 111                 throws SAXException
 112         {
 113                 handler_.characters(text.toCharArray(), 0, text.length());
 114         }
 115
 116         public void nl()
 117                 throws SAXException
 118         {
 119                 text("\n");
 120         }
 121
 122         public void endDocument()
 123                 throws SAXException
 124         {
 125                 handler_.endDocument();
 126         }
 127 }