org.apache.james.mailet.standard.mailets.MailAttributesToMimeHeaders Maven / Gradle / Ivy

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package org.apache.james.mailet.standard.mailets;

import java.util.HashMap;
import java.util.StringTokenizer;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import org.apache.mailet.base.GenericMailet;
import org.apache.mailet.Mail;

/**
 * Convert attributes to headers
 * 
 * Sample configuration:
 * 
 * <mailet match="All" class="MailAttributesToMimeHeaders">
 * <simplemapping>org.apache.james.attribute1;
 * headerName1</simplemapping>
 * <simplemapping>org.apache.james.attribute2;
 * headerName2</simplemapping> </mailet>
 * 
 */
public class MailAttributesToMimeHeaders extends GenericMailet {

    /**
     * HashMap which holds the attributeName and headerName
     */
    private HashMap map = new HashMap();

    /*
     * (non-Javadoc)
     * @see org.apache.mailet.base.GenericMailet#init()
     */
    public void init() throws MessagingException {
        String simplemappings = getInitParameter("simplemapping");
        if (simplemappings != null) {

            StringTokenizer st = new StringTokenizer(simplemappings, ",");
            while (st.hasMoreTokens()) {

                String parameters[] = st.nextToken().split(";");

                // Check if we have a valid config
                if (parameters.length > 2 || parameters.length < 2) {
                    throw new MessagingException(
                            "Invalid config. Please use \"attributeName; headerName\"");
                } else {
                    // Add it to the map
                    map.put(parameters[0].trim(), parameters[1].trim());
                }
            }
        } else {
            throw new MessagingException(
                    "Invalid config. Please use \"attributeName; headerName\"");
        }
    }

    /*
     * (non-Javadoc)
     * @see org.apache.mailet.base.GenericMailet#service(org.apache.mailet.Mail)
     */
    public void service(Mail mail) {
        MimeMessage message;
        try {
            message = mail.getMessage();

            for (String key : map.keySet()) {
                String value = (String) mail.getAttribute(key);
                String headerName = map.get(key);

                // Check if we have all needed values
                if (headerName != null && value != null) {
                    // Add the header
                    message.setHeader(headerName, value);
                }
            }
            message.saveChanges();
        } catch (MessagingException e) {
            log(e.getMessage());
        }
    }

}