package org.internna.iwebmvc.spring.util;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.util.CollectionUtils;
/**
* Injects fields after serialization.
*
* @author Jose Noheda
* @since 2.0
*
*/
public final class TransientFieldsInjector implements ApplicationContextAware {
private static ApplicationContext applicationContext;
private static final Log logger = LogFactory.getLog(TransientFieldsInjector.class);
@Override public void setApplicationContext(ApplicationContext appCtx) throws BeansException {
TransientFieldsInjector.applicationContext = appCtx;
}
@SuppressWarnings("unchecked")
public static void inject (Object bean, String... properties) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException {
for (String propertyName : properties) {
PropertyDescriptor property = BeanUtils.getPropertyDescriptor(bean.getClass(), propertyName);
Class<?> propertyClass = property.getPropertyType();
Map<String, Object> deps = applicationContext.getBeansOfType(propertyClass);
if (!CollectionUtils.isEmpty(deps)) {
if (deps.size() != 1) logger.warn("More than one bean of type [" + propertyClass + "] in context. Unexpected errors may happen with unserialized bean!");
Object dependency = deps.entrySet().iterator().next().getValue();
property.getWriteMethod().invoke(bean, dependency);
}
}
}
}