nl.altindag.ssl.util.internal.ValidationUtils Maven / Gradle / Ivy

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/*
 * Copyright 2019 Thunderberry.
 *
 * 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
 *
 *      https://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 nl.altindag.ssl.util.internal;

import java.util.List;
import java.util.function.Supplier;
import java.util.function.UnaryOperator;

/**
 * NOTE:
 * Please don't use this class directly as it is part of the internal API. Class name and methods can be changed any time.
 *
 * @author Hakan Altindag
 */
public final class ValidationUtils {

    public static final UnaryOperator GENERIC_EXCEPTION_MESSAGE = objectType -> String.format("No valid %s has been provided. %s must be present, but was absent.", objectType, objectType);

    private ValidationUtils() {
    }

    public static  T requireNotNull(T maybeNull, String message) {
        return requireNotNull(maybeNull, () -> new IllegalArgumentException(message));
    }

    public static  T requireNotNull(T maybeNull, Supplier exceptionSupplier) {
        if (maybeNull == null) {
            throw exceptionSupplier.get();
        }
        return maybeNull;
    }

    public static  List requireNotEmpty(List maybeNull, String message) {
        return requireNotEmpty(maybeNull, () -> new IllegalArgumentException(message));
    }

    public static  List requireNotEmpty(List maybeNull, Supplier exceptionSupplier) {
        if (maybeNull == null || maybeNull.isEmpty()) {
            throw exceptionSupplier.get();
        }
        return maybeNull;
    }

    public static  T[] requireNotEmpty(T[] maybeNull, String message) {
        return requireNotEmpty(maybeNull, () -> new IllegalArgumentException(message));
    }

    public static  T[] requireNotEmpty(T[] maybeNull, Supplier exceptionSupplier) {
        if (maybeNull == null || maybeNull.length == 0) {
            throw exceptionSupplier.get();
        }
        return maybeNull;
    }

    public static String requireNotBlank(String maybeNull, String message) {
        return requireNotBlank(maybeNull, () -> new IllegalArgumentException(message));
    }

    public static String requireNotBlank(String maybeNull, Supplier exceptionSupplier) {
        if (StringUtils.isBlank(maybeNull)) {
            throw exceptionSupplier.get();
        }
        return maybeNull;
    }

}