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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
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package org.apache.mailet;

import javax.mail.MessagingException;
import java.util.Collection;
import java.util.Iterator;
import java.util.Vector;

/**
 * GenericMatcher makes writing recipient based matchers easier. It provides
 * simple versions of the lifecycle methods init and destroy and of the methods
 * in the MatcherConfig interface. GenericMatcher also implements the log method,
 * declared in the MatcherContext interface.
 *
 * @version 1.0.0, 24/04/1999
 */
public abstract class GenericRecipientMatcher extends GenericMatcher {

    /**
     * Matches each recipient one by one through matchRecipient(MailAddress
     * recipient) method.  Handles splitting the recipients Collection
     * as appropriate.
     *
     * @param mail - the message and routing information to determine whether to match
     * @return Collection the Collection of MailAddress objects that have been matched
     */
    public final Collection match(Mail mail) throws MessagingException {
        Collection matching = new Vector();
        for (Iterator i = mail.getRecipients().iterator(); i.hasNext(); ) {
            MailAddress rec = (MailAddress) i.next();
            if (matchRecipient(rec)) {
                matching.add(rec);
            }
        }
        return matching;
    }

    /**
     * Simple check to match exclusively on the email address (not
     * message information).
     *
     * @param recipient - the address to determine whether to match
     * @return boolean whether the recipient is a match
     */
    public abstract boolean matchRecipient(MailAddress recipient) throws MessagingException;
}