001// --------------------------------------------------------------------------------
002// Copyright 2002-2024 Echo Three, LLC
003//
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//
008//     http://www.apache.org/licenses/LICENSE-2.0
009//
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// --------------------------------------------------------------------------------
016
017package com.echothree.util.server.string;
018
019import com.echothree.model.data.core.server.entity.EntityInstance;
020import com.fasterxml.uuid.Generators;
021
022public class GuidUtils
023        extends BaseIdUtils {
024    
025    private GuidUtils() {
026        super();
027    }
028    
029    private static class GuidUtilsHolder {
030        static GuidUtils instance = new GuidUtils();
031    }
032    
033    public static GuidUtils getInstance() {
034        return GuidUtilsHolder.instance;
035    }
036
037    public String generateGuid(EntityInstance entityInstance) {
038        return Generators.timeBasedEpochGenerator().construct(getEntityInstanceCreatedTime(entityInstance)).toString();
039    }
040
041}