001//
002// MIT License
003//
004// Copyright (c) 2021 Alexander Söderberg & Contributors
005//
006// Permission is hereby granted, free of charge, to any person obtaining a copy
007// of this software and associated documentation files (the "Software"), to deal
008// in the Software without restriction, including without limitation the rights
009// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
010// copies of the Software, and to permit persons to whom the Software is
011// furnished to do so, subject to the following conditions:
012//
013// The above copyright notice and this permission notice shall be included in all
014// copies or substantial portions of the Software.
015//
016// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
017// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
018// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
019// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
020// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
021// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
022// SOFTWARE.
023//
024package cloud.commandframework.util;
025
026import org.checkerframework.checker.nullness.qual.NonNull;
027
028/**
029 * String utilities
030 */
031public final class StringUtils {
032
033    private StringUtils() {
034    }
035
036    /**
037     * Count the occurrences of a character in a string
038     *
039     * @param haystack The string to search in
040     * @param needle   The character to count for
041     * @return Number of occurrences
042     */
043    public static int countCharOccurrences(final @NonNull String haystack, final char needle) {
044        int occurrences = 0;
045        for (int i = 0; i < haystack.length(); i++) {
046            if (haystack.charAt(i) == needle) {
047                occurrences++;
048            }
049        }
050        return occurrences;
051    }
052
053}