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Extension adding AS4 support to Oxalis

There is a newer version: 6.7.0

/*
 * Copyright 2010-2017 Norwegian Agency for Public Management and eGovernment (Difi)
 *
 * Licensed under the EUPL, Version 1.1 or – as soon they
 * will be approved by the European Commission - subsequent
 * versions of the EUPL (the "Licence");
 *
 * You may not use this work except in compliance with the Licence.
 *
 * You may obtain a copy of the Licence at:
 *
 * https://joinup.ec.europa.eu/community/eupl/og_page/eupl
 *
 * Unless required by applicable law or agreed to in
 * writing, software distributed under the Licence is
 * distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied.
 * See the Licence for the specific language governing
 * permissions and limitations under the Licence.
 */

package network.oxalis.as4.util;

import lombok.experimental.UtilityClass;

import java.util.regex.Pattern;

@UtilityClass
public class MessageIdUtil {

    private static final String ATEXT = "[A-Za-z0-9!#\\$%&'\\*\\+\\-/=\\?\\^_`\\{}\\|~]+";

    private static final Pattern PATTERN =
            Pattern.compile("^" + ATEXT + "(\\." + ATEXT + ")*@" + ATEXT + "(\\." + ATEXT + ")*$");

    public static boolean verify(String identifier) {
        return PATTERN.matcher(identifier).matches();
    }

    public static String wrap(String cid) {
        if (cid == null) {
            return null;
        }

        if (cid.startsWith("<") && cid.endsWith(">")) {
            return cid;
        }

        return String.format("<%s>", cid);
    }
}