/*
    * Copyright 2007 The Kuali Foundation
    *
    * Licensed under the Educational Community 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
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * 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 org.kuali.rice.core.config;
  
  import org.springframework.beans.factory.FactoryBean;
  
  /**
   * The entire purpose of this class is to wrap an otherwise normal bean
   * whose class is dynamically set at runtime through the PropertyPlaceholderConfigurer
   * because the <bean> element attributes themselves are not parameterizable,
   * only the property values. 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class BeanHolder implements FactoryBean {
      private Class clazz;
      private Object instance;
  
      public synchronized Object getObject() throws Exception {
          if (this.instance == null) {
              this.instance = this.clazz.newInstance();
          }
          return this.instance;
      }
  
      public Class getObjectType() {
          return this.clazz;
      }
  
      public void setObjectType(Class clazz) {
          this.clazz = clazz;
      }
  
      public boolean isSingleton() {
          return true;
      }
  }