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Provide a truly minimalist demonstration of using JAF - Java Activation Framewor

*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*/

import javax.activation.*;
import java.awt.datatransfer.*;
import java.io.*;

/** Provide a truly minimalist demonstration of using JAF (aka
 * javax.activation, the Java Activation Framework) to read one
 * object and classify it.
 */
public class MimeHandler {

class PlainHandler implements DataContentHandler {
      private DataFlavor[] taste = {
         new DataFlavor("text/plain", "Plain text"),
         new DataFlavor("text/html", "HTML text")
      };

public DataFlavor[] getTransferDataFlavors() {
         return taste;
      }

public Object getTransferData(DataFlavor fl, DataSource ds)
         throws UnsupportedFlavorException, java.io.IOException {
         // XXX
         return null;
      }
      public Object getContent(DataSource ds)
         throws java.io.IOException {
         BufferedReader is =
            new BufferedReader(new InputStreamReader(ds.getInputStream()));
         StringBuffer sb = new StringBuffer();
         int ch;
         while ((ch = is.read()) != -1)
            sb.append((char)ch);
         return sb.toString();
      }
      public void writeTo(Object o, String s, OutputStream os)
         throws java.io.IOException {
         //XXX
         return;
      }
   }

class MyDataContentHandlerFactory implements DataContentHandlerFactory {
      public DataContentHandler createDataContentHandler(String mimeType){
         DataContentHandler dch = null;

if ("text/plain".equals(mimeType)) {
            return new PlainHandler();
         } else if ("text/html".equals(mimeType)) {
            return new PlainHandler();
         } else {
            String mesg = "No handler for " + mimeType;
            throw new IllegalArgumentException(mesg);
         }
      }
   }

public static void main(String[] args) throws IOException {
      MimeHandler mh = new MimeHandler();

mh.process(args[0]);
   }

private void process(String fn) throws IOException {
      DataSource ds = new FileDataSource(fn);

DataHandler dh = new DataHandler(ds);

dh.setDataContentHandlerFactory(new MyDataContentHandlerFactory());

Object data = dh.getContent();

System.out.println("Content=" + data);
      if (data != null)
         System.out.println("Type   =" + data.getClass().getName());
   }
}

1	Provide a truly minimalist demonstration of using JAF - Java Activation Framewor
2	javax.activation
3	Movie database generated classes


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