content: /*
   *  Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
   *  <p>
   *  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
   *  <p>
   *  http://www.apache.org/licenses/LICENSE-2.0
   *  <p>
   *  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 com.agentsflex.core.document.id;
  
  public abstract class DocumentIdGeneratorFactory {
  
      private static DocumentIdGeneratorFactory factory = new DocumentIdGeneratorFactory() {
          final MD5IdGenerator randomIdGenerator = new MD5IdGenerator();
  
          @Override
          public DocumentIdGenerator createGenerator() {
              return randomIdGenerator;
          }
      };
  
      public static DocumentIdGeneratorFactory getFactory() {
          return factory;
      }
  
      public static void setFactory(DocumentIdGeneratorFactory factory) {
          if (factory == null) {
              throw new NullPointerException("factory can not be null");
          }
          DocumentIdGeneratorFactory.factory = factory;
      }
  
      public static DocumentIdGenerator getDocumentIdGenerator() {
          return factory.createGenerator();
      }
  
  
      abstract DocumentIdGenerator createGenerator();
  
  }
  