/*
* Copyright 2005-2006 the original author or authors.
*
* 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
*
* 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.strecks.bind.handler;
import java.beans.PropertyDescriptor;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.strecks.converter.Converter;
import org.strecks.converter.handler.ConversionHandler;
import org.strecks.exceptions.ConversionRuntimeException;
import org.strecks.util.Assert;
import org.strecks.util.ReflectHelper;
/**
* Abstract base class for <code>BindHandler</code>s. Implements convenience methods used by
* subclasses
*
* @author Phil Zoio
*/
public class AbstractBindHandler
{
private static Log log = LogFactory.getLog(AbstractBindHandler.class);
private PropertyDescriptor propertyDescriptor;
private Converter converter;
private ConversionHandler conversionHandler;
/**
* Instantiates converter using the <code>Class.newInstance()</code> method
* @param propertyType
* the target class of the converter {@see Converter.setTargetClass() }
* @param converterClass
* the name off the converter class to instantiate
* @return a newly created instance of <code>Converter</code>
*/
protected Converter createConverter(Class<?> propertyType, Class converterClass)
{
Assert.notNull(converterClass);
Converter converter = ReflectHelper.createInstance(converterClass, Converter.class);
converter.setTargetClass(propertyType);
return converter;
}
public PropertyDescriptor getPropertyDescriptor()
{
return propertyDescriptor;
}
public void setPropertyDescriptor(PropertyDescriptor propertyDescriptor)
{
Assert.notNull(propertyDescriptor);
this.propertyDescriptor = propertyDescriptor;
}
protected ConversionHandler getConversionHandler()
{
return conversionHandler;
}
public void setConversionHandler(ConversionHandler conversionHandler)
{
this.conversionHandler = conversionHandler;
}
/**
* Handles conversion from the source property where the possibility exists that the type of the
* source property to be converted may be incompatible with the <code>Converter</code>
* parameterization type
*/
@SuppressWarnings("unchecked")
protected Object getAndConvertInwards(Object source, String sourcePropertyName, Converter converter)
{
try
{
return conversionHandler.getAndConvertInwards(source, sourcePropertyName, converter);
}
catch (ConversionRuntimeException e)
{
log.warn("Conversion error attempting to bind property " + source + " in object of class "
+ source.getClass().getName() + ". Have you validated this conversion?", e);
return null;
}
}
/**
* Handles conversion from the target property where the possibility exists that the type of the
* source property to be converted may be incompatible with the <code>Converter</code>
* parameterization type
*/
@SuppressWarnings("unchecked")
protected Object getAndConvertOutwards(Object targetBean, String propertyName, Converter converter)
{
return conversionHandler.getAndConvertOutwards(targetBean, propertyName, converter);
}
public final Converter getConverter()
{
return converter;
}
public final void setConverter(Converter converter)
{
this.converter = converter;
}
public final Class getConverterClass()
{
return converter.getClass();
}
}