bytearraydatasource.java

java开源的企业总线.xmlBlaster

/*
 * @(#)ByteArrayDataSource.java	1.4 01/05/23
 *
 * Copyright 1998-2000 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * 
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND
 * ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES OR LIABILITIES
 * SUFFERED BY LICENSEE AS A RESULT OF  OR RELATING TO USE, MODIFICATION
 * OR DISTRIBUTION OF THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL
 * SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
 * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
 * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
 * ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS
 * BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that Software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */
package org.xmlBlaster.util.protocol.email;

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

/**
 * A simple DataSource for demonstration purposes. This class implements a
 * DataSource from: an InputStream a byte array a String
 * 
 * @author John Mani
 * @author Bill Shannon
 * @author Max Spivak
 */
public class ByteArrayDataSource implements DataSource {
   private byte[] data; // data

   private String type; // content-type

   /* Create a DataSource from an input stream */
   public ByteArrayDataSource(InputStream is, String type) {
      this.type = type;
      try {
         ByteArrayOutputStream os = new ByteArrayOutputStream(10000);
         int ch;
         byte[] buf = new byte[10000];
         while ((ch = is.read(buf)) != -1) {
            // XXX - must be made more efficient by
            // doing buffered reads, rather than one byte reads
            os.write(buf, 0, ch);
         }
         data = os.toByteArray();

      } catch (IOException ioex) {
      }
   }

   /* Create a DataSource from a byte array */
   public ByteArrayDataSource(byte[] data, String type) {
      this.data = data;
      this.type = type;
   }

   /* Create a DataSource from a String */
   public ByteArrayDataSource(String data, String type) {
      try {
         // Assumption that the string contains only ASCII
         // characters! Otherwise just pass a charset into this
         // constructor and use it in getBytes()
         this.data = data.getBytes("iso-8859-1");
      } catch (UnsupportedEncodingException uex) {
      }
      this.type = type;
   }

   /**
    * Return an InputStream for the data. Note - a new stream must be returned
    * each time.
    */
   public InputStream getInputStream() throws IOException {
      if (data == null)
         throw new IOException("no data");
      return new ByteArrayInputStream(data);
   }

   public OutputStream getOutputStream() throws IOException {
      throw new IOException("cannot do this");
   }

   public String getContentType() {
      return type;
   }

   public String getName() {
      return "dummy";
   }
}