001/*
002 *  Copyright (c) 2023-2026, Agents-Flex (fuhai999@gmail.com).
003 *  <p>
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *  <p>
008 *  http://www.apache.org/licenses/LICENSE-2.0
009 *  <p>
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package com.agentsflex.core.document.id;
017
018public abstract class DocumentIdGeneratorFactory {
019
020    private static DocumentIdGeneratorFactory factory = new DocumentIdGeneratorFactory() {
021        final MD5IdGenerator randomIdGenerator = new MD5IdGenerator();
022
023        @Override
024        public DocumentIdGenerator createGenerator() {
025            return randomIdGenerator;
026        }
027    };
028
029    public static DocumentIdGeneratorFactory getFactory() {
030        return factory;
031    }
032
033    public static void setFactory(DocumentIdGeneratorFactory factory) {
034        if (factory == null) {
035            throw new NullPointerException("factory can not be null");
036        }
037        DocumentIdGeneratorFactory.factory = factory;
038    }
039
040    public static DocumentIdGenerator getDocumentIdGenerator() {
041        return factory.createGenerator();
042    }
043
044
045    abstract DocumentIdGenerator createGenerator();
046
047}