StringUtility.java

/*  This file is part of Openrouteservice.
 *
 *  Openrouteservice 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 2.1
 *  of the License, or (at your option) any later version.

 *  This library 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 this library;
 *  if not, see <https://www.gnu.org/licenses/>.
 */
package org.heigit.ors.util;

import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;

public class StringUtility {

    private StringUtility() {
    }

    public static boolean isEmpty(String str) {
        return str == null || str.trim().length() == 0;
    }

    public static String substring(String str, char pattern) {
        int pos1 = -1;
        int pos2 = -1;
        for (int j = 0; j < str.length(); j++) {
            if (str.charAt(j) == pattern) {
                if (pos1 == -1)
                    pos1 = j;
                else {
                    pos2 = j;
                    break;
                }
            }
        }
        if (pos1 != -1 && pos2 != -1)
            return str.substring(pos1 + 1, pos2);
        else
            return null;
    }

    public static boolean containsDigit(String s) {
        if (s != null && !s.isEmpty()) {
            for (int i = 0; i < s.length(); ++i) {
                char ch = s.charAt(i);
                if ((ch >= '0' && ch <= '9'))
                    return true;
            }
        }
        return false;
    }

    public static String trimQuotes(String str) {
        return trim(str, '"');
    }

    public static String trim(String str, char ch) {
        if (str == null)
            return null;
        String result = str;
        int firstChar = str.indexOf(ch);
        int lastChar = str.lastIndexOf(ch);
        int length = str.length();
        if (firstChar == 0 && lastChar == length - 1)
            result = result.substring(1, length - 1);

        return result;
    }

    public static String arrayToString(double[] array, String separator) {
        int length = array.length;
        if (length == 0) return "";
        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < length; ++i) {
            sb.append(array[i]);
            if (i < length - 1)
                sb.append(separator);
        }
        return sb.toString();
    }

    public static String combine(String[] values, String separator) {
        if (values == null)
            return null;
        StringBuilder result = new StringBuilder();
        int n = values.length;
        for (int i = 0; i < n; ++i) {
            result.append(values[i]).append(i < n - 1 ? separator : "");
        }
        return result.toString();
    }

    public static String decodeRequestString(String inputString) throws UnsupportedEncodingException {
        if (inputString.startsWith("REQUEST=")) {
            inputString = inputString.substring(8);
        }
        if (inputString.startsWith("xml=")) {
            inputString = inputString.substring(4);
        } else if (inputString.startsWith("---")) {
            int iIndexStart = inputString.indexOf("<?xml");
            inputString = inputString.substring(iIndexStart);
            int iIndexEnd = inputString.indexOf("---");
            inputString = inputString.substring(0, iIndexEnd);
        }

        // Decode the application/x-www-form-url encoded query string
        return java.net.URLDecoder.decode(inputString, StandardCharsets.ISO_8859_1);// "UTF-8"
    }

    public static String decodeRequestString2(String inputString) throws UnsupportedEncodingException {
        if (inputString.startsWith("REQUEST=")) {
            inputString = inputString.substring(8);
        } else if (inputString.startsWith("---")) {
            int iIndexStart = inputString.indexOf("<?xml");
            inputString = inputString.substring(iIndexStart);
            int iIndexEnd = inputString.indexOf("---");
            inputString = inputString.substring(0, iIndexEnd);
        }

        // Decode the application/x-www-form-url encoded query string
        return java.net.URLDecoder.decode(inputString, StandardCharsets.ISO_8859_1);// "UTF-8"
    }

    public static boolean isNullOrEmpty(String str) {
        return str == null || str.length() == 0;
    }
}