com.jcabi.email.stamp.StSubject Maven / Gradle / Ivy

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/**
 * Copyright (c) 2014-2015, jcabi.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met: 1) Redistributions of source code must retain the above
 * copyright notice, this list of conditions and the following
 * disclaimer. 2) Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided
 * with the distribution. 3) Neither the name of the jcabi.com nor
 * the names of its contributors may be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.jcabi.email.stamp;

import com.jcabi.aspects.Immutable;
import com.jcabi.aspects.Loggable;
import com.jcabi.email.Stamp;
import java.io.UnsupportedEncodingException;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.internet.MimeUtility;
import lombok.EqualsAndHashCode;
import lombok.ToString;

/**
 * Stamp for a MIME envelope, with a subject.
 *
 * @author Yegor Bugayenko ([email protected])
 * @version $Id: 71b69f99b46e62fa041ee3aadf0d71b9dcaa6c89 $
 * @since 1.0
 */
@Immutable
@ToString
@EqualsAndHashCode(of = "subject")
@Loggable(Loggable.DEBUG)
public final class StSubject implements Stamp {

    /**
     * Subject.
     */
    private final transient String subject;

    /**
     * Ctor.
     * @param subj Subject
     */
    public StSubject(final String subj) {
        this.subject = subj;
    }

    @Override
    public void attach(final Message message) throws MessagingException {
        try {
            message.setSubject(
                MimeUtility.encodeText(this.subject, "UTF-8", "Q")
            );
        } catch (final UnsupportedEncodingException ex) {
            throw new IllegalStateException(ex);
        }
    }

}