content: /**
   * Copyright (c) 2010-present Abixen Systems. All rights reserved.
   *
   * This library is free software; you can redistribute it and/or modify it under
   * the terms of the GNU Lesser General Public License as published by the Free
   * Software Foundation; either version 2.1 of the License, or (at your option)
   * any later version.
   *
   * This library is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
   * details.
   */
  
  package com.abixen.platform.common.domain.model;
  
  
  public abstract class AbstractBuilder<T> {
  
      protected T product;
  
      public AbstractBuilder() {
          initProduct();
      }
  
      public final T build() {
          final T temp = assembleProduct();
          if (temp == null) {
              throw new IllegalStateException("Only single build() call is allowed");
          }
          this.product = null;
  
          return temp;
      }
  
      protected abstract void initProduct();
  
      protected T assembleProduct() {
          return this.product;
      }
  
  }