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/*
* 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.tuscany.sca.implementation.spring.processor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.beans.PropertyDescriptor;
import java.lang.annotation.Annotation;
import java.util.List;
import org.springframework.util.Assert;
import org.springframework.beans.BeanUtils;
import org.springframework.util.ReflectionUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.FatalBeanException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.oasisopen.sca.annotation.Property;
import org.apache.tuscany.sca.assembly.ComponentProperty;
import org.apache.tuscany.sca.core.factory.ObjectFactory;
import org.apache.tuscany.sca.implementation.java.injection.JavaPropertyValueObjectFactory;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
public class PropertyAnnotationProcessor implements BeanPostProcessor {
private Class<? extends Annotation> propertyAnnotationType = Property.class;
private RuntimeComponent component;
private JavaPropertyValueObjectFactory propertyFactory;
public PropertyAnnotationProcessor (JavaPropertyValueObjectFactory propertyFactory,
RuntimeComponent component) {
this.propertyFactory = propertyFactory;
this.component = component;
}
/**
* Gets property annotation type.
*/
protected Class<? extends Annotation> getPropertyAnnotationType() {
return this.propertyAnnotationType;
}
/**
* Sets property annotation type.
*/
public void setPropertyAnnotationType(Class<? extends Annotation> propertyAnnotationType) {
Assert.notNull(propertyAnnotationType, "'propertyAnnotationType' type must not be null.");
this.propertyAnnotationType = propertyAnnotationType;
}
/**
* This method is used to execute before a bean's initialization callback.
*
* @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessBeforeInitialization(java.lang.Object, java.lang.String)
*/
public Object postProcessBeforeInitialization(Object bean, String beanName)
throws BeansException {
processAnnotation(bean);
return bean;
}
/**
* This method is used to execute after a bean's initialization callback.
*
* @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessAfterInitialization(java.lang.Object, java.lang.String)
*/
public Object postProcessAfterInitialization(Object bean, String beanName)
throws BeansException {
return bean;
}
/**
* <p>Processes a beans fields for injection if it has a {@link Property} annotation.</p>
*/
protected void processAnnotation(final Object bean) {
final Class<?> clazz = bean.getClass();
ReflectionUtils.doWithMethods(clazz, new ReflectionUtils.MethodCallback() {
public void doWith(Method method) {
//Annotation annotation = method.getAnnotation(getPropertyAnnotationType());
Property annotation = (Property) method.getAnnotation(getPropertyAnnotationType());
if (annotation != null) {
if (Modifier.isStatic(method.getModifiers())) {
throw new IllegalStateException("Property annotation is not supported on static methods");
}
if (Modifier.isPrivate(method.getModifiers())) {
throw new IllegalStateException("Property annotation is not supported on private methods");
}
if (method.getParameterTypes().length == 0) {
throw new IllegalStateException("Property annotation requires at least one argument: " + method);
}
PropertyDescriptor pd = BeanUtils.findPropertyForMethod(method);
if (pd != null) {
String propName = annotation.name();
if ("".equals(propName)) {
injectProperty(bean, pd, getPropertyObj(pd.getPropertyType(), pd.getName()));
} else {
injectProperty(bean, pd, getPropertyObj(pd.getPropertyType(), propName));
}
}
}
}
});
ReflectionUtils.doWithFields(clazz, new ReflectionUtils.FieldCallback() {
public void doWith(Field field) {
//Annotation annotation = field.getAnnotation(getPropertyAnnotationType());
Property annotation = (Property) field.getAnnotation(getPropertyAnnotationType());
if (annotation != null) {
if (Modifier.isStatic(field.getModifiers())) {
throw new IllegalStateException("Property annotation is not supported on static fields");
}
if (Modifier.isPrivate(field.getModifiers())) {
throw new IllegalStateException("Property annotation is not supported on private fields");
}
ReflectionUtils.makeAccessible(field);
Object propertyObj = null;
String propName = annotation.name();
if ("".equals(propName)) {
propertyObj = getPropertyObj(field.getType(), field.getName());
} else {
propertyObj = getPropertyObj(field.getType(), propName);
}
if (propertyObj != null)
ReflectionUtils.setField(field, bean, propertyObj);
}
}
});
}
/**
* Processes a property descriptor to inject a service.
*/
public Object getPropertyObj(Class requiredType, String name) {
Object propertyObj = null;
List<ComponentProperty> props = component.getProperties();
for (ComponentProperty prop : props) {
if (prop.getName().equals(name)) {
// On finding the property, create a factory for it and create a Bean using
// the factory
ObjectFactory factory = propertyFactory.createValueFactory(prop, prop.getValue(), requiredType);
propertyObj = factory.getInstance();
} // end if
} // end for
return propertyObj;
}
public void injectProperty(Object bean, PropertyDescriptor pd, Object propertyObj) {
if (propertyObj != null) {
try {
pd.getWriteMethod().invoke(bean, new Object[] { propertyObj });
} catch (Throwable e) {
throw new FatalBeanException("Problem injecting property: " + e.getMessage(), e);
}
}
}
/**
* Processes a property descriptor to inject a service.
*/
/*public void injectMethod(Object bean, Method method) {
PropertyDescriptor pd = BeanUtils.findPropertyForMethod(method);
if (pd != null) {
Object propertyObj = null;
List<ComponentProperty> props = component.getProperties();
for (ComponentProperty prop : props) {
if (prop.getName().equals(pd.getName())) {
// On finding the property, create a factory for it and create a Bean using
// the factory
ObjectFactory factory = propertyFactory.createValueFactory(prop, prop.getValue(), pd.getPropertyType());
propertyObj = factory.getInstance();
} // end if
} // end for
if (propertyObj != null) {
try {
pd.getWriteMethod().invoke(bean, new Object[] { propertyObj });
} catch (Throwable e) {
throw new FatalBeanException("Problem injecting property: " + e.getMessage(), e);
}
}
}
}*/
}
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