/*

  * Copyright 2005-2008 The Kuali Foundation

  * 

  * 

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  * 

  * http://www.opensource.org/licenses/ecl2.php

  * 

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.kew.util;

 import java.io.BufferedOutputStream;

 import java.io.ByteArrayInputStream;

 import java.io.ByteArrayOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.OutputStream;

 import java.io.UnsupportedEncodingException;

 import javax.activation.DataSource;

 import org.kuali.rice.kew.api.WorkflowRuntimeException;

 /**

  * A simple DataSource for demonstration purposes. This class implements a

  * DataSource from: an InputStream a byte array a String.

  */

 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 baos = new ByteArrayOutputStream();

             OutputStream os = new BufferedOutputStream(baos);

             int byteData;

             while ((byteData = is.read()) != -1) {

                 os.write(byteData);

             }

             os.flush();

             data = baos.toByteArray();

         } catch (IOException ioex) {

                 throw new WorkflowRuntimeException(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";

     }

 }