/***********************************************************************
* Copyright (c) 2003-2004 The Apache Software Foundation. *
* All rights reserved. *
* ------------------------------------------------------------------- *
* Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0 *
* *
* 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.apache.james.util.mail.handlers;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import javax.activation.ActivationDataFlavor;
import javax.activation.DataSource;
import javax.mail.MessagingException;
import javax.mail.internet.ContentType;
import javax.mail.internet.MimeUtility;
import javax.mail.internet.ParseException;
/**
* <p>Data Content Handler for...</p>
* <dl>
* <dt>MIME type name</dt><dd>message</dd>
* <dt>MIME subtype name</dt><dd>disposition-notification</dd>
* </dl>
*/
public class message_disposition_notification
extends
AbstractDataContentHandler
{
/**
* Default Constructor.
*/
public message_disposition_notification()
{
super();
}
/**
* @see org.apache.james.util.mail.handlers.AbstractDataContentHandler#computeDataFlavor()
*/
protected ActivationDataFlavor computeDataFlavor()
{
return new ActivationDataFlavor(String.class,
"message/disposition-notification", "Message String");
}
/**
* @see org.apache.james.util.mail.handlers.AbstractDataContentHandler#computeContent(javax.activation.DataSource)
*/
protected Object computeContent(DataSource aDataSource)
throws MessagingException
{
String encoding = getCharacterSet(aDataSource.getContentType());
Reader reader = null;
Writer writer = new StringWriter(2048);
String content = null;
try
{
reader = new BufferedReader(new InputStreamReader(aDataSource
.getInputStream(), encoding), 2048);
while (reader.ready())
writer.write(reader.read());
writer.flush();
content = writer.toString();
}
catch (IllegalArgumentException e)
{
throw new MessagingException("Encoding = \"" + encoding + "\"", e);
}
catch (IOException e)
{
throw new MessagingException(
"Exception obtaining content from DataSource", e);
}
finally
{
try
{
writer.close();
}
catch (IOException e1)
{
// No-op
}
}
return content;
}
/**
* @see javax.activation.DataContentHandler#writeTo(java.lang.Object,
* java.lang.String, java.io.OutputStream)
*/
public void writeTo(Object aPart, String aMimeType, OutputStream aStream)
throws IOException
{
if (!(aPart instanceof String))
throw new IOException("Type \"" + aPart.getClass().getName()
+ "\" is not supported.");
String encoding = getCharacterSet(getDataFlavor().getMimeType());
Writer writer = null;
try
{
writer = new BufferedWriter(new OutputStreamWriter(aStream,
encoding), 2048);
}
catch (IllegalArgumentException e)
{
throw new UnsupportedEncodingException(encoding);
}
writer.write((String) aPart);
writer.flush();
}
protected String getCharacterSet(String aType)
{
String characterSet = null;
try
{
characterSet = new ContentType(aType).getParameter("charset");
}
catch (ParseException e)
{
// no-op
}
finally
{
if (null == characterSet)
characterSet = "us-ascii";
}
return MimeUtility.javaCharset(characterSet);
}
}