1   /**
    2    *
    3    * Licensed to the Apache Software Foundation (ASF) under one or more
    4    * contributor license agreements.  See the NOTICE file distributed with
    5    * this work for additional information regarding copyright ownership.
    6    * The ASF licenses this file to You under the Apache License, Version 2.0
    7    * (the "License"); you may not use this file except in compliance with
    8    * the License.  You may obtain a copy of the License at
    9    *
   10    *     http://www.apache.org/licenses/LICENSE-2.0
   11    *
   12    *  Unless required by applicable law or agreed to in writing, software
   13    *  distributed under the License is distributed on an "AS IS" BASIS,
   14    *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   15    *  See the License for the specific language governing permissions and
   16    *  limitations under the License.
   17    */
   18   package org.apache.openejb.core.cmp;
   19   
   20   import java.lang.reflect.Field;
   21   import javax.ejb.EntityBean;
   22   
   23   import org.apache.openejb.OpenEJBException;
   24   
   25   public class SimpleKeyGenerator extends AbstractKeyGenerator {
   26       private final Field pkField;
   27   
   28       public SimpleKeyGenerator(Class beanClass, String pkField) throws OpenEJBException {
   29           this.pkField = getField(beanClass, pkField);
   30           if (!isValidPkField(this.pkField)) {
   31               throw new OpenEJBException("Invalid primray key field: " + pkField);
   32           }
   33       }
   34   
   35       public Object getPrimaryKey(EntityBean bean) {
   36           Object value = getFieldValue(pkField, bean);
   37           return value;
   38       }
   39   }