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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.runtime.tomcat;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import javax.naming.NamingException;
import org.apache.AnnotationProcessor;
import org.apache.catalina.core.StandardContext;
import org.apache.tuscany.sca.host.embedded.SCADomain;
import org.apache.tuscany.sca.host.webapp.WebAppServletHost;
import org.osoa.sca.annotations.Reference;
/**
* A Tuscany specific Tomcat annotation processor for processing SCA annotations
*/
public class TuscanyAnnotationProcessor implements AnnotationProcessor {
private StandardContext scaApp;
public TuscanyAnnotationProcessor(StandardContext scaApp) {
this.scaApp = scaApp;
}
public void postConstruct(Object instance) throws IllegalAccessException, InvocationTargetException {
}
public void preDestroy(Object instance) throws IllegalAccessException, InvocationTargetException {
}
public void processAnnotations(Object instance) throws IllegalAccessException, InvocationTargetException, NamingException {
// Initialize fields annotations
Field[] fields = instance.getClass().getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
if (fields[i].isAnnotationPresent(Reference.class)) {
Reference annotation = fields[i].getAnnotation(Reference.class);
injectFieldResource(instance, fields[i], annotation);
}
}
// Initialize methods annotations
Method[] methods = instance.getClass().getDeclaredMethods();
for (int i = 0; i < methods.length; i++) {
if (methods[i].isAnnotationPresent(Reference.class)) {
Reference annotation = methods[i].getAnnotation(Reference.class);
injectMethodResource(instance, methods[i], annotation);
}
}
}
protected void injectFieldResource(Object instance, Field field, Reference annotation) throws IllegalArgumentException, IllegalAccessException {
String serviceName = annotation.name();
if (serviceName == null || serviceName.length() < 1) {
serviceName = field.getName();
}
Object service = getSCADomain().getService(field.getType(), serviceName);
boolean accessibility = field.isAccessible();
field.setAccessible(true);
field.set(instance, service);
field.setAccessible(accessibility);
}
protected void injectMethodResource(Object instance, Method method, Reference annotation) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException {
String serviceName = annotation.name();
if (serviceName == null || serviceName.length() < 1) {
StringBuilder setterName = new StringBuilder(method.getName());
setterName.setCharAt(4, Character.toLowerCase(setterName.charAt(4)));
serviceName = setterName.substring(4);
}
Object service = getSCADomain().getService(method.getParameterTypes()[0], serviceName);
boolean accessibility = method.isAccessible();
method.setAccessible(true);
method.invoke(instance, service);
method.setAccessible(accessibility);
}
protected SCADomain getSCADomain() {
return (SCADomain)scaApp.getServletContext().getAttribute(WebAppServletHost.SCA_DOMAIN_ATTRIBUTE);
}
}
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