EmailAddressList.java

/**
 * Copyright © 2002 Instituto Superior Técnico
 *
 * This file is part of FenixEdu Academic.
 *
 * FenixEdu Academic is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * FenixEdu Academic is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with FenixEdu Academic.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.fenixedu.academic.domain.util;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;

public class EmailAddressList implements Serializable {

    private final String emailAddresses;

    public EmailAddressList(final String emailAddresses) {
        super();
        this.emailAddresses = emailAddresses == null || emailAddresses.length() == 0 ? null : emailAddresses;
    }

    public EmailAddressList(final Collection<String> emailAddressCollection) {
        super();
        final StringBuilder emailAddresses = new StringBuilder();
        if (emailAddressCollection != null) {
            for (final String emailAddress : emailAddressCollection) {
                if (emailAddress != null) {
                    final String emailAddressTrimmed = emailAddress.trim();
                    if (emailAddresses.length() > 0) {
                        emailAddresses.append(", ");
                    }
                    emailAddresses.append(emailAddressTrimmed);
                }
            }
        }
        this.emailAddresses = emailAddresses.length() == 0 ? null : emailAddresses.toString();
    }

    @Override
    public String toString() {
        return emailAddresses;
    }

    public String[] toArray() {
        return emailAddresses == null ? new String[0] : emailAddresses.split(", ");
    }

    public Collection<String> toCollection() {
        if (emailAddresses == null) {
            return Collections.EMPTY_LIST;
        }
        final Collection<String> collection = new ArrayList<String>();
        for (final String emailAddress : toArray()) {
            collection.add(emailAddress);
        }
        return collection;
    }

    public boolean isEmpty() {
        return emailAddresses == null || emailAddresses.length() == 0;
    }

    public int size() {
        return toArray().length;
    }

}