/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://oss.oracle.com/licenses/CDDL+GPL-1.1
* or LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package javax.mail.internet;
import javax.mail.*;
import javax.activation.*;
import java.io.*;
import java.net.
UnknownServiceException;
import com.sun.mail.util.
PropUtil;
import com.sun.mail.util.
FolderClosedIOException;
/**
* A utility class that implements a DataSource out of
* a MimePart. This class is primarily meant for service providers.
*
* @see javax.mail.internet.MimePart
* @see javax.activation.DataSource
* @author John Mani
*/
public class
MimePartDataSource implements
DataSource,
MessageAware {
/**
* The MimePart that provides the data for this DataSource.
*
* @since JavaMail 1.4
*/
protected
MimePart part;
private
MessageContext context;
/**
* Constructor, that constructs a DataSource from a MimePart.
*
* @param part the MimePart
*/
public
MimePartDataSource(
MimePart part) {
this.
part =
part;
}
/**
* Returns an input stream from this MimePart. <p>
*
* This method applies the appropriate transfer-decoding, based
* on the Content-Transfer-Encoding attribute of this MimePart.
* Thus the returned input stream is a decoded stream of bytes.<p>
*
* This implementation obtains the raw content from the Part
* using the <code>getContentStream()</code> method and decodes
* it using the <code>MimeUtility.decode()</code> method.
*
* @see javax.mail.internet.MimeMessage#getContentStream
* @see javax.mail.internet.MimeBodyPart#getContentStream
* @see javax.mail.internet.MimeUtility#decode
* @return decoded input stream
*/
@
Override
public
InputStream getInputStream() throws
IOException {
InputStream is;
try {
if (
part instanceof
MimeBodyPart)
is = ((
MimeBodyPart)
part).
getContentStream();
else if (
part instanceof
MimeMessage)
is = ((
MimeMessage)
part).
getContentStream();
else
throw new
MessagingException("Unknown part");
String encoding =
MimeBodyPart.
restrictEncoding(
part,
part.
getEncoding());
if (
encoding != null)
return
MimeUtility.
decode(
is,
encoding);
else
return
is;
} catch (
FolderClosedException fex) {
throw new
FolderClosedIOException(
fex.
getFolder(),
fex.
getMessage());
} catch (
MessagingException mex) {
IOException ioex = new
IOException(
mex.
getMessage());
ioex.
initCause(
mex);
throw
ioex;
}
}
/**
* DataSource method to return an output stream. <p>
*
* This implementation throws the UnknownServiceException.
*/
@
Override
public
OutputStream getOutputStream() throws
IOException {
throw new
UnknownServiceException("Writing not supported");
}
/**
* Returns the content-type of this DataSource. <p>
*
* This implementation just invokes the <code>getContentType</code>
* method on the MimePart.
*/
@
Override
public
String getContentType() {
try {
return
part.
getContentType();
} catch (
MessagingException mex) {
// would like to be able to reflect the exception to the
// application, but since we can't do that we return a
// generic "unknown" value here and hope for another
// exception later.
return "application/octet-stream";
}
}
/**
* DataSource method to return a name. <p>
*
* This implementation just returns an empty string.
*/
@
Override
public
String getName() {
try {
if (
part instanceof
MimeBodyPart)
return ((
MimeBodyPart)
part).
getFileName();
} catch (
MessagingException mex) {
// ignore it
}
return "";
}
/**
* Return the <code>MessageContext</code> for the current part.
* @since JavaMail 1.1
*/
@
Override
public synchronized
MessageContext getMessageContext() {
if (
context == null)
context = new
MessageContext(
part);
return
context;
}
}