content: /*
   * Copyright (c) 2020 Adam Gaj
   *
   * 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 com.adgadev.jplusone.core.proxy;
  
  import java.util.concurrent.atomic.AtomicInteger;
  
  public class Identifier {
  
      private final static AtomicInteger ENTITY_MANAGER_SEQUENCE = new AtomicInteger(0);
  
      private static final String ENTITY_MANAGER_SEQUENCE_LABEL = "EM";
  
      private final String label;
  
      private final int number;
  
      private Identifier(String sequenceLabel, AtomicInteger sequence) {
          this.label = sequenceLabel;
          this.number = sequence.incrementAndGet();
      }
  
      public static Identifier nextEntityManagerIdentifier() {
          return new Identifier(ENTITY_MANAGER_SEQUENCE_LABEL, ENTITY_MANAGER_SEQUENCE);
      }
  
      @Override
      public String toString() {
          return label + "-" + number;
      }
  }
  