javax.mail.internet.PreencodedMimeBodyPart Maven / Gradle / Ivy
/*
* 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 java.io.*;
import java.util.Enumeration;
import javax.mail.*;
import com.sun.mail.util.LineOutputStream;
/**
* A MimeBodyPart that handles data that has already been encoded.
* This class is useful when constructing a message and attaching
* data that has already been encoded (for example, using base64
* encoding). The data may have been encoded by the application,
* or may have been stored in a file or database in encoded form.
* The encoding is supplied when this object is created. The data
* is attached to this object in the usual fashion, by using the
* setText, setContent, or
* setDataHandler methods.
*
* @since JavaMail 1.4
*/
public class PreencodedMimeBodyPart extends MimeBodyPart {
private String encoding;
/**
* Create a PreencodedMimeBodyPart that assumes the data is
* encoded using the specified encoding. The encoding must
* be a MIME supported Content-Transfer-Encoding.
*
* @param encoding the Content-Transfer-Encoding
*/
public PreencodedMimeBodyPart(String encoding) {
this.encoding = encoding;
}
/**
* Returns the content transfer encoding specified when
* this object was created.
*/
@Override
public String getEncoding() throws MessagingException {
return encoding;
}
/**
* Output the body part as an RFC 822 format stream.
*
* @exception IOException if an error occurs writing to the
* stream or if an error is generated
* by the javax.activation layer.
* @exception MessagingException for other failures
* @see javax.activation.DataHandler#writeTo
*/
@Override
public void writeTo(OutputStream os)
throws IOException, MessagingException {
// see if we already have a LOS
LineOutputStream los = null;
if (os instanceof LineOutputStream) {
los = (LineOutputStream) os;
} else {
los = new LineOutputStream(os);
}
// First, write out the header
Enumeration hdrLines = getAllHeaderLines();
while (hdrLines.hasMoreElements())
los.writeln(hdrLines.nextElement());
// The CRLF separator between header and content
los.writeln();
// Finally, the content, already encoded.
getDataHandler().writeTo(os);
os.flush();
}
/**
* Force the Content-Transfer-Encoding header to use
* the encoding that was specified when this object was created.
*/
@Override
protected void updateHeaders() throws MessagingException {
super.updateHeaders();
MimeBodyPart.setEncoding(this, encoding);
}
}