/*
 * Copyright 2013-2020 the original author or authors.
 *
 * 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 org.springframework.cloud.contract.spec.internal;

import java.util.Random;

final class RandomStringGenerator {

	private RandomStringGenerator() {
		throw new IllegalStateException("Can't instantiate a utility class");
	}

	static String randomString(int length) {
		char[] characterSet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();
		Random random = new Random();
		char[] result = new char[length];
		for (int i = 0; i < result.length; i++) {
			// picks a random index out of character set > random character
			int randomCharIndex = random.nextInt(characterSet.length);
			result[i] = characterSet[randomCharIndex];
		}
		return new String(result);
	}

}
