/***
* 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.interceptor;
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.core.MethodInfo;
import br.com.caelum.vraptor.core.RequestInfo;
import br.com.caelum.vraptor.http.UrlToResourceTranslator;
import br.com.caelum.vraptor.http.route.MethodNotAllowedException;
import br.com.caelum.vraptor.http.route.ResourceNotFoundException;
import br.com.caelum.vraptor.resource.MethodNotAllowedHandler;
import br.com.caelum.vraptor.resource.ResourceMethod;
import br.com.caelum.vraptor.resource.ResourceNotFoundHandler;
/**
* Looks up the resource for a specific request and delegates for the 404
* component if unable to find it.
*
* @author Guilherme Silveira
* @author Cecilia Fernandes
*/
public class ResourceLookupInterceptor implements Interceptor {
private static final Logger LOGGER = LoggerFactory.getLogger(ResourceLookupInterceptor.class);
private final UrlToResourceTranslator translator;
private final MethodInfo methodInfo;
private final RequestInfo requestInfo;
private final ResourceNotFoundHandler resourceNotFoundHandler;
private final MethodNotAllowedHandler methodNotAllowedHandler;
public ResourceLookupInterceptor(UrlToResourceTranslator translator, MethodInfo methodInfo,
ResourceNotFoundHandler resourceNotFoundHandler, MethodNotAllowedHandler methodNotAllowedHandler,
RequestInfo requestInfo) {
this.translator = translator;
this.methodInfo = methodInfo;
this.methodNotAllowedHandler = methodNotAllowedHandler;
this.resourceNotFoundHandler = resourceNotFoundHandler;
this.requestInfo = requestInfo;
}
public void intercept(InterceptorStack stack, ResourceMethod ignorableMethod, Object resourceInstance)
throws InterceptionException {
try {
ResourceMethod method = translator.translate(requestInfo);
methodInfo.setResourceMethod(method);
stack.next(method, resourceInstance);
} catch (ResourceNotFoundException e) {
resourceNotFoundHandler.couldntFind(requestInfo);
} catch (MethodNotAllowedException e) {
LOGGER.debug(e.getMessage(), e);
methodNotAllowedHandler.deny(requestInfo, e.getAllowedMethods());
}
}
public boolean accepts(ResourceMethod method) {
return true;
}
}