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52°North OWS Framework

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/*
 * Copyright 2016-2017 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.n52.shetland.util;

import com.google.common.base.Strings;

/**
 * TODO JavaDoc
 *
 * @author Christian Autermann
 */
public final class CRSHelper {

    private CRSHelper() {
    }

    public static String asHttpPrefix(String prefix) {
        return (!prefix.endsWith("/") && !prefix.isEmpty() && prefix.startsWith("http")) ? prefix + "/" : prefix;
    }

    public static String asUrnPrefix(String prefix) {
        return (!prefix.endsWith(":") && !prefix.isEmpty() && prefix.startsWith("urn")) ? prefix + ":" : prefix;
    }

    /**
     *
     * Parse the srsName to integer value
     *
     * @param srsName
     *                the srsName to parse
     *
     * @return srsName integer value
     *
     */
    public static int parseSrsName(String srsName) {
        if (!Strings.isNullOrEmpty(srsName) && !"NOT_SET".equalsIgnoreCase(srsName)) {
            int idx = Math.max(srsName.lastIndexOf(':'), srsName.lastIndexOf('/'));
            if (idx >= 0 && idx < srsName.length() - 1) {
                return Integer.parseInt(srsName.substring(idx + 1), 10);
            }
        }
        return -1;
    }

}