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MimeMessageUtils.java
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MimeMessageUtils.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.commons.mail.util;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.internet.MimeMessage;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
/**
* Static helper methods.
*
* @since 1.3
*/
public final class MimeMessageUtils
{
/**
* Instances should NOT be constructed in standard programming.
*/
private MimeMessageUtils()
{
}
/**
* Create a MimeMessage.
*
* @param session the mail session
* @param source the input data
* @return the MimeMessage
* @throws MessagingException creating the MimeMessage failed
* @throws IOException creating the MimeMessage failed
*/
public static MimeMessage createMimeMessage(final Session session, final byte[] source)
throws MessagingException, IOException
{
try (ByteArrayInputStream is = new ByteArrayInputStream(source))
{
return new MimeMessage(session, is);
}
}
/**
* Create a MimeMessage.
*
* @param session the mail session
* @param source the input data
* @return the MimeMessage
* @throws MessagingException creating the MimeMessage failed
* @throws IOException creating the MimeMessage failed
*/
public static MimeMessage createMimeMessage(final Session session, final File source)
throws MessagingException, IOException
{
try (FileInputStream is = new FileInputStream(source))
{
return createMimeMessage(session, is);
}
}
/**
* Create a MimeMessage.
*
* @param session the mail session
* @param source the input data
* @return the MimeMessage
* @throws MessagingException creating the MimeMessage failed
*/
public static MimeMessage createMimeMessage(final Session session, final InputStream source)
throws MessagingException
{
return new MimeMessage(session, source);
}
/**
* Create a MimeMessage using the platform's default character encoding.
*
* @param session the mail session
* @param source the input data
* @return the MimeMessage
* @throws MessagingException creating the MimeMessage failed
* @throws IOException creating the MimeMessage failed
*/
public static MimeMessage createMimeMessage(final Session session, final String source)
throws MessagingException, IOException
{
ByteArrayInputStream is = null;
try
{
final byte[] byteSource = source.getBytes(Charset.defaultCharset());
is = new ByteArrayInputStream(byteSource);
return createMimeMessage(session, is);
}
finally
{
if (is != null)
{
is.close();
}
}
}
/**
* Convenience method to write a MimeMessage into a file.
*
* @param mimeMessage the MimeMessage to write
* @param resultFile the file containing the MimeMessgae
* @throws MessagingException accessing MimeMessage failed
* @throws IOException writing the MimeMessage failed
*/
public static void writeMimeMessage(final MimeMessage mimeMessage, final File resultFile)
throws MessagingException, IOException
{
FileOutputStream fos = null;
try
{
if (!resultFile.getParentFile().exists() && !resultFile.getParentFile().mkdirs())
{
throw new IOException(
"Failed to create the following parent directories: "
+ resultFile.getParentFile());
}
fos = new FileOutputStream(resultFile);
mimeMessage.writeTo(fos);
fos.flush();
fos.close();
fos = null;
}
finally
{
if (fos != null)
{
fos.close();
}
}
}
}