dom/src/main/java/org/apache/james/mime4j/field/MailboxListFieldImpl.java

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package org.apache.james.mime4j.field;

import org.apache.james.mime4j.codec.DecodeMonitor;
import org.apache.james.mime4j.dom.FieldParser;
import org.apache.james.mime4j.dom.address.MailboxList;
import org.apache.james.mime4j.dom.field.MailboxListField;
import org.apache.james.mime4j.field.address.DefaultAddressParser;
import org.apache.james.mime4j.field.address.ParseException;
import org.apache.james.mime4j.stream.Field;

/**
 * Mailbox-list field such as <code>From</code> or <code>Resent-From</code>.
 */
public class MailboxListFieldImpl extends AbstractField implements MailboxListField {
    private boolean parsed = false;

    private MailboxList mailboxList;
    private ParseException parseException;

    MailboxListFieldImpl(Field rawField, DecodeMonitor monitor) {
        super(rawField, monitor);
    }

    /**
     * @see org.apache.james.mime4j.dom.field.MailboxListField#getMailboxList()
     */
    public MailboxList getMailboxList() {
        if (!parsed)
            parse();

        return mailboxList;
    }

    /**
     * @see org.apache.james.mime4j.dom.field.MailboxListField#getParseException()
     */
    @Override
    public ParseException getParseException() {
        if (!parsed)
            parse();

        return parseException;
    }

    private void parse() {
        String body = getBody();

        try {
            mailboxList = DefaultAddressParser.DEFAULT.parseAddressList(body, monitor).flatten();
        } catch (ParseException e) {
            parseException = e;
        }

        parsed = true;
    }

    public static final FieldParser<MailboxListField> PARSER = new FieldParser<MailboxListField>() {

        public MailboxListField parse(final Field rawField, final DecodeMonitor monitor) {
            return new MailboxListFieldImpl(rawField, monitor);
        }

    };
}