content: /*
   * Copyright 2025 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 io.agentscope.runtime.sandbox.manager.util;
  
  import java.security.SecureRandom;
  
  /**
   * Random string generator
   */
  public class RandomStringGenerator {
      private static final String CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
      private static final SecureRandom RANDOM = new SecureRandom();
  
      /**
       * Generate random string of specified length
       * @param length string length
       * @return random string
       */
      public static String generateRandomString(int length) {
          StringBuilder sb = new StringBuilder(length);
          for (int i = 0; i < length; i++) {
              sb.append(CHARACTERS.charAt(RANDOM.nextInt(CHARACTERS.length())));
          }
          return sb.toString();
      }
  }