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Command framework and dispatcher for the JVM

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//
// MIT License
//
// Copyright (c) 2022 Alexander Söderberg & Contributors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
package cloud.commandframework.util;

import org.apiguardian.api.API;
import org.checkerframework.checker.nullness.qual.NonNull;

/**
 * String utilities
 */
@API(status = API.Status.INTERNAL, consumers = "cloud.commandframework.*")
public final class StringUtils {

    private StringUtils() {
    }

    /**
     * Count the occurrences of a character in a string
     *
     * @param haystack The string to search in
     * @param needle   The character to count for
     * @return Number of occurrences
     */
    public static int countCharOccurrences(final @NonNull String haystack, final char needle) {
        int occurrences = 0;
        for (int i = 0; i < haystack.length(); i++) {
            if (haystack.charAt(i) == needle) {
                occurrences++;
            }
        }
        return occurrences;
    }
}