/***
* Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
* All rights reserved.
*
* Licensed 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 br.com.caelum.vraptor.vraptor2.outject;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import net.vidageek.mirror.dsl.Mirror;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import br.com.caelum.vraptor.InterceptionException;
import br.com.caelum.vraptor.core.InterceptorStack;
import br.com.caelum.vraptor.interceptor.Interceptor;
import br.com.caelum.vraptor.ioc.Component;
import br.com.caelum.vraptor.resource.ResourceMethod;
import br.com.caelum.vraptor.vraptor2.BeanHelper;
import br.com.caelum.vraptor.vraptor2.ComponentInfoProvider;
/**
* Uses the designated outjecter to outjects all vraptor2 compatible get
* accessible parameters.<br>
* VRaptor3-2 compatibility mode only supports type methods, not @Out annotation
* (further support might be implemented if required).
*
* @author Guilherme Silveira
*/
@Component
public class OutjectionInterceptor implements Interceptor {
private static final String GET = "get";
private static final String IS = "is";
private static final Logger logger = LoggerFactory.getLogger(OutjectionInterceptor.class);
private static final BeanHelper helper = new BeanHelper();
private final Outjecter outjecter;
public OutjectionInterceptor(ComponentInfoProvider provider) {
this.outjecter = provider.getOutjecter();
}
public boolean accepts(ResourceMethod method) {
return true;
}
public void intercept(InterceptorStack stack, ResourceMethod method, Object resourceInstance) throws InterceptionException {
Class<?> type = method.getResource().getType();
outject(resourceInstance, type);
stack.next(method, resourceInstance);
}
public void outject(Object resourceInstance, Class<?> type) throws InterceptionException {
Method[] methods = type.getDeclaredMethods();
for (Method outject : methods) {
if (Modifier.isPublic(outject.getModifiers()) && outject.getName().length() < 3
|| !(outject.getName().startsWith(IS) || outject.getName().startsWith(GET))) {
continue;
}
if (outject.getParameterTypes().length != 0) {
logger.error("A get method was found at " + type
+ " but was not used because it receives parameters. Fix it.");
continue;
} else if (outject.getReturnType().equals(void.class)) {
logger
.error("A get method was found at " + type
+ " but was not used because it returns void. Fix it.");
continue;
}
Object result = new Mirror().on(resourceInstance).invoke().method(outject).withoutArgs();
String name = helper.nameForGetter(outject);
logger.debug("Outjecting {} as {}", name, result);
outjecter.include(name, result);
}
}
}