/***
* 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;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Method;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.vraptor.annotations.Logic;
import br.com.caelum.vraptor.http.ParameterNameProvider;
import br.com.caelum.vraptor.http.ParanamerNameProvider;
import br.com.caelum.vraptor.ioc.ApplicationScoped;
import br.com.caelum.vraptor.ioc.Component;
/**
* Looks up for the Logic annotation on the method, if its found and containing
* the parameters value, its value is used. Otherwise, fallsback to the
* delegated provider. The default delegate provider is the paranamer based.
*
* @author Guilherme Silveira
*/
@Component
@ApplicationScoped
public class LogicAnnotationWithParanamerParameterNameProvider implements ParameterNameProvider {
private static final Logger logger = LoggerFactory.getLogger(LogicAnnotationWithParanamerParameterNameProvider.class);
private final ParameterNameProvider delegate;
public LogicAnnotationWithParanamerParameterNameProvider() {
this(new ParanamerNameProvider());
}
public LogicAnnotationWithParanamerParameterNameProvider(ParameterNameProvider delegate) {
this.delegate = delegate;
}
public String[] parameterNamesFor(AccessibleObject method) {
if (method.isAnnotationPresent(Logic.class)) {
return method.getAnnotation(Logic.class).parameters();
}
try {
return delegate.parameterNamesFor(method);
} catch (IllegalStateException e) {
// TODO: complete hack for Scala based components
// (because scFunction).
logger.warn("VRaptor2 Component method without parameter names! Returning null array {}", method);
return new String[((Method) method).getParameterTypes().length];
}
}
}