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An S/MIME library for JavaMail

There is a newer version: 2.3.11

/*
 * Copyright © 2021 Benny Bottema ([email protected])
 *
 * 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.simplejavamail.utils.mail.smime;

import jakarta.mail.MessagingException;
import jakarta.mail.Session;
import org.eclipse.angus.mail.smtp.SMTPMessage;
import org.jetbrains.annotations.Nullable;

import static java.lang.String.format;

public class SmimeMessageIdFixingSMTPMessage extends SMTPMessage {
    @Nullable
    private final String messageId;

    public SmimeMessageIdFixingSMTPMessage(Session session, @Nullable String messageId) {
        super(session);
        this.messageId = messageId;
    }

    @Override
    protected void updateMessageID() throws MessagingException {
        if (messageId == null || messageId.length() == 0) {
            super.updateMessageID();
        } else {
            setHeader("Message-ID", messageId);
        }
    }

    @Override
    public String toString() {
        try {
            return format("SmimeSMTPMessage", super.getMessageID(), super.getSubject());
        } catch (MessagingException e) {
            throw new IllegalStateException("should not reach here");
        }
    }
}