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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.tie;
import java.beans.PropertyDescriptor;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import org.oasisopen.sca.annotation.Property;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.FatalBeanException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.util.Assert;
import org.springframework.util.ReflectionUtils;
public class PropertyAnnotationProcessor implements BeanPostProcessor {
private Class<? extends Annotation> propertyAnnotationType = Property.class;
private PropertyValueStub propertyValue;
public PropertyAnnotationProcessor(PropertyValueStub propertyValue) {
this.propertyValue = propertyValue;
}
/**
* 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) {
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, propertyValue.getPropertyObj(pd.getPropertyType(), pd.getName()));
} else {
injectProperty(bean, pd, propertyValue.getPropertyObj(pd.getPropertyType(), propName));
}
}
}
}
});
ReflectionUtils.doWithFields(clazz, new ReflectionUtils.FieldCallback() {
public void doWith(Field field) {
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 = propertyValue.getPropertyObj(field.getType(), field.getName());
} else {
propertyObj = propertyValue.getPropertyObj(field.getType(), propName);
}
if (propertyObj != null)
ReflectionUtils.setField(field, bean, 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);
}
}
}
}
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