/* | |
* Licensed to the Apache Software Foundation (ASF) under one or more | |
* contributor license agreements. See the NOTICE file distributed with | |
* this work for additional information regarding copyright ownership. | |
* The ASF licenses this file to You 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 | |
* | |
* http://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 org.apache.commons.proxy2.provider; | |
import org.apache.commons.proxy2.ObjectProvider; | |
import org.apache.commons.proxy2.exception.ObjectProviderException; | |
import java.io.Serializable; | |
/** | |
* Uses <code>Class.newInstance()</code> to instantiate an object. | |
* | |
* @author James Carman | |
* @since 1.0 | |
*/ | |
public class BeanProvider<T> implements ObjectProvider<T>, Serializable | |
{ | |
/** Serialization version */ | |
private static final long serialVersionUID = 1L; | |
//********************************************************************************************************************** | |
// Fields | |
//********************************************************************************************************************** | |
private Class<? extends T> beanClass; | |
//********************************************************************************************************************** | |
// Constructors | |
//********************************************************************************************************************** | |
/** | |
* Create a new BeanProvider instance. | |
*/ | |
public BeanProvider() | |
{ | |
} | |
/** | |
* Constructs a provider which instantiates objects of the specified bean class. | |
* | |
* @param beanClass the bean class | |
*/ | |
public BeanProvider( Class<? extends T> beanClass ) | |
{ | |
this.beanClass = beanClass; | |
} | |
//********************************************************************************************************************** | |
// ObjectProvider Implementation | |
//********************************************************************************************************************** | |
/** | |
* {@inheritDoc} | |
*/ | |
public T getObject() | |
{ | |
try | |
{ | |
if( beanClass == null ) | |
{ | |
throw new ObjectProviderException("No bean class provided."); | |
} | |
return beanClass.newInstance(); | |
} | |
catch( InstantiationException e ) | |
{ | |
throw new ObjectProviderException("Class " + beanClass.getName() + " is not concrete.", e); | |
} | |
catch( IllegalAccessException e ) | |
{ | |
throw new ObjectProviderException("Constructor for class " + beanClass.getName() + " is not accessible.", | |
e); | |
} | |
} | |
//********************************************************************************************************************** | |
// Getter/Setter Methods | |
//********************************************************************************************************************** | |
/** | |
* Set the beanClass. | |
* @param beanClass the Class<T> to set | |
*/ | |
public void setBeanClass(Class<? extends T> beanClass) { | |
this.beanClass = beanClass; | |
} | |
} |