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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
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package org.apache.james.mailetcontainer.impl.matchers;

import java.util.Collection;
import java.util.HashSet;

import javax.mail.MessagingException;

import org.apache.james.core.MailAddress;
import org.apache.mailet.Mail;
import org.apache.mailet.Matcher;

/**
 * This is the Or CompositeMatcher - consider it to be a union of the
 * results.
 *
 * @return Collection of Recipients from the Or composition results of the
 *         child matchers.
 */
public class Or extends GenericCompositeMatcher {

    @Override
    public Collection<MailAddress> match(Mail mail) throws MessagingException {
        HashSet<MailAddress> result = new HashSet<>();
        for (Matcher matcher : getMatchers()) {
            Collection<MailAddress> matchResult = matcher.match(mail);
            if (matchResult != null) {
                result.addAll(matchResult);
            }
            if (result.size() == mail.getRecipients().size()) {
                break;
            }
        }
        return result;
    }

}
