mixed content sax example

ws/eclipse/Jdbc/src/main/java/sax/mixed/Driver.java

+package sax.mixed;
+
+/** Driver */
+public class Driver {
+  /** @param argv unused */
+  public static void main(String argv[]) {
+    try{
+    MixedCount xmlStats = new MixedCount();
+    xmlStats.parse("src/main/java/sax/mixed/mixed.xml");
+
+    System.out.println("Document contains "
+        + xmlStats.getElementCount() + " text nodes within mixed content elements");
+    } catch (Exception e){
+      e.printStackTrace(System.err);
+    }
+  }
+}
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ws/eclipse/Jdbc/src/main/java/sax/mixed/MixedCount.java

+package sax.mixed;
+
+import java.io.IOException;
+
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import org.xml.sax.SAXException;
+import org.xml.sax.XMLReader;
+
+/** Parser, content- and errorhandler assembly */
+public class MixedCount {
+  /** @throws SAXException
+   *  @throws ParserConfigurationException */
+  public MixedCount()
+   throws SAXException, ParserConfigurationException{
+      final SAXParserFactory saxPf = SAXParserFactory.newInstance();
+      final SAXParser saxParser = saxPf.newSAXParser();
+      xmlReader = saxParser.getXMLReader();
+      xmlReader.setContentHandler(eventHandler);
+      xmlReader.setErrorHandler(errorHandler);
+  }
+  /** @see sax.stat.v1.ElementCount
+   * @param uri
+   * @throws IOException
+   * @throws SAXException */
+  public void parse(final String uri) 
+    throws IOException, SAXException{
+    xmlReader.parse(uri);
+  }
+  /** @return @see sax.stat.v1.ElementCount#getElementCount() */
+  public int getElementCount() {
+    return eventHandler.getMixedElementCount();
+  }
+  private final XMLReader xmlReader;
+  private final MixedCountHandler eventHandler = new MixedCountHandler();
+  private final MyErrorHandler errorHandler = new MyErrorHandler();
+}
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ws/eclipse/Jdbc/src/main/java/sax/mixed/MixedCountHandler.java

+package sax.mixed;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+import org.xml.sax.helpers.DefaultHandler;
+
+public class MixedCountHandler extends DefaultHandler {
+   
+   enum EventType {openElement, closeElement, character, idle};
+   EventType lastEvent = EventType.idle;
+
+   private int mixedElementCount = 0;
+
+   @Override
+   public void startElement(String uri, String localName, String qName,
+         Attributes attributes) throws SAXException {
+      if (lastEvent == EventType.character) {
+         mixedElementCount++;
+      }
+      lastEvent = EventType.openElement;
+   }
+
+   @Override
+   public void endElement(String uri, String localName, String qName)
+         throws SAXException {
+      lastEvent = EventType.closeElement;
+   }
+
+   @Override
+   public void characters(char[] ch, int start, int length) throws SAXException {
+      final String content = new String(ch, start, length);
+      
+      // We ignore whitespace completely
+      if (0 < content.trim().length()) {
+         if (lastEvent == EventType.closeElement) {
+            mixedElementCount++;
+         }
+         lastEvent = EventType.character;
+      }
+   }
+   
+   public int getMixedElementCount() {
+      return mixedElementCount;
+   }
+}
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ws/eclipse/Jdbc/src/main/java/sax/mixed/MyErrorHandler.java

+package sax.mixed;
+
+import org.xml.sax.SAXException;
+import org.xml.sax.SAXParseException;
+import org.xml.sax.ErrorHandler;
+
+/** Handle parsing errors */
+public class MyErrorHandler implements ErrorHandler {
+  /** @see ErrorHandler#warning(SAXParseException) */
+  public void warning(SAXParseException e) {
+    System.err.println("[Warning]" + getLocationString(e));
+  }
+  /** @see ErrorHandler#error(SAXParseException) */
+  public void error(SAXParseException e) {
+    System.err.println("[Error]" + getLocationString(e));
+  }
+  /** @see ErrorHandler#fatalError(SAXParseException) */
+  public void fatalError(SAXParseException e) throws SAXException{
+    System.err.println("[Fatal Error]" + getLocationString(e));
+  }
+  private String getLocationString(SAXParseException e) {
+    return " line " + e.getLineNumber() +
+    	", column " + e.getColumnNumber()+ ":" +  e.getMessage();
+  }
+}
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ws/eclipse/Jdbc/src/main/java/sax/mixed/mixed.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<top>
+    <a>Test 1</a>
+    <b>Some <c>mixed</c> content</b>
+    <d><nothingMixed/></d>
+    <d>  <nothingMixed/> </d>
+</top>
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