org.apache.struts2.spring.ClassReloadingInstantiationStrategy Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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*/
package org.apache.struts2.spring;
import org.springframework.beans.factory.support.SimpleInstantiationStrategy;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.BeanInstantiationException;
import org.springframework.beans.BeanUtils;
import java.lang.reflect.Constructor;
/**
* Same as SimpleInstantiationStrategy, but constructor is not cached
*/
public class ClassReloadingInstantiationStrategy extends SimpleInstantiationStrategy {
public Object instantiate(
RootBeanDefinition beanDefinition, String beanName, BeanFactory owner) {
// Don't override the class with CGLIB if no overrides.
if (beanDefinition.getMethodOverrides().isEmpty()) {
Class clazz = beanDefinition.getBeanClass();
if (clazz.isInterface()) {
throw new BeanInstantiationException(clazz, "Specified class is an interface");
}
try {
Constructor constructor = clazz.getDeclaredConstructor((Class[]) null);
return BeanUtils.instantiateClass(constructor, null);
}
catch (Exception ex) {
throw new BeanInstantiationException(clazz, "No default constructor found", ex);
}
} else {
// Must generate CGLIB subclass.
return instantiateWithMethodInjection(beanDefinition, beanName, owner);
}
}
}