/*
* Copyright 2016 the original author or authors.
*
* 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.springframework.integration.mail.support;
import java.util.HashMap;
import java.util.Map;
import javax.mail.Address;
import javax.mail.Message;
import javax.mail.Message.RecipientType;
import org.springframework.integration.mail.MailHeaders;
import org.springframework.messaging.MessagingException;
import org.springframework.util.Assert;
/**
* Utilities for handling mail messages.
*
* @author Gary Russell
* @since 4.3
*
*/
public final class MailUtils {
private MailUtils() {
// empty
}
/**
* Map the message headers to a Map using {@link MailHeaders} keys; specifically
* maps the address headers and the subject.
* @param source the message.
* @return the map.
*/
public static Map<String, Object> extractStandardHeaders(Message source) {
Map<String, Object> headers = new HashMap<String, Object>();
try {
headers.put(MailHeaders.FROM, convertToString(source.getFrom()));
headers.put(MailHeaders.BCC, convertToStringArray(source.getRecipients(RecipientType.BCC)));
headers.put(MailHeaders.CC, convertToStringArray(source.getRecipients(RecipientType.CC)));
headers.put(MailHeaders.TO, convertToStringArray(source.getRecipients(RecipientType.TO)));
headers.put(MailHeaders.REPLY_TO, convertToString(source.getReplyTo()));
headers.put(MailHeaders.SUBJECT, source.getSubject());
return headers;
}
catch (Exception e) {
throw new MessagingException("conversion of MailMessage headers failed", e);
}
}
private static String convertToString(Address[] addresses) {
if (addresses == null || addresses.length == 0) {
return null;
}
Assert.state(addresses.length == 1, "expected a single value but received an Array");
return addresses[0].toString();
}
private static String[] convertToStringArray(Address[] addresses) {
if (addresses != null) {
String[] addressStrings = new String[addresses.length];
for (int i = 0; i < addresses.length; i++) {
addressStrings[i] = addresses[i].toString();
}
return addressStrings;
}
return new String[0];
}
}