/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/*
* @(#)MimePartDataSource.java 1.9 02/03/27
*/
package com.sun.xml.internal.messaging.saaj.packaging.mime.internet;
import java.io.*;
import java.net.UnknownServiceException;
import javax.activation.DataSource;
import com.sun.xml.internal.messaging.saaj.packaging.mime.MessagingException;
/**
* A utility class that implements a DataSource out of
* a MimeBodyPart. This class is primarily meant for service providers.
*
* @author John Mani
*/
public final class MimePartDataSource implements DataSource {
private final MimeBodyPart part;
/**
* Constructor, that constructs a DataSource from a MimeBodyPart.
*/
public MimePartDataSource(MimeBodyPart part) {
this.part = part;
}
/**
* Returns an input stream from this MimeBodyPart. <p>
*
* This method applies the appropriate transfer-decoding, based
* on the Content-Transfer-Encoding attribute of this MimeBodyPart.
* Thus the returned input stream is a decoded stream of bytes.<p>
*
* This implementation obtains the raw content from the MimeBodyPart
* using the <code>getContentStream()</code> method and decodes
* it using the <code>MimeUtility.decode()</code> method.
*
* @return decoded input stream
*/
public InputStream getInputStream() throws IOException {
try {
InputStream is = part.getContentStream();
String encoding = part.getEncoding();
if (encoding != null)
return MimeUtility.decode(is, encoding);
else
return is;
} catch (MessagingException mex) {
throw new IOException(mex.getMessage());
}
}
/**
* DataSource method to return an output stream. <p>
*
* This implementation throws the UnknownServiceException.
*/
public OutputStream getOutputStream() throws IOException {
throw new UnknownServiceException();
}
/**
* Returns the content-type of this DataSource. <p>
*
* This implementation just invokes the <code>getContentType</code>
* method on the MimeBodyPart.
*/
public String getContentType() {
return part.getContentType();
}
/**
* DataSource method to return a name. <p>
*
* This implementation just returns an empty string.
*/
public String getName() {
try {
return part.getFileName();
} catch (MessagingException mex) {
return "";
}
}
}