org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher Maven / Gradle / Ivy
The newest version!
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2011-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.jersey.server.model.internal;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.UndeclaredThrowableException;
import javax.ws.rs.ProcessingException;
import javax.ws.rs.core.Request;
import javax.ws.rs.core.Response;
import javax.inject.Inject;
import org.glassfish.jersey.server.internal.inject.ConfiguredValidator;
import org.glassfish.jersey.server.internal.process.MappableException;
import org.glassfish.jersey.server.model.Invocable;
import org.glassfish.jersey.server.spi.internal.ResourceMethodDispatcher;
/**
* Abstract resource method dispatcher that provides skeleton implementation of
* dispatching requests to a particular {@link Method Java method} using supplied
* {@link InvocationHandler Java method invocation handler}.
*
* @author Marek Potociar (marek.potociar at oracle.com)
*/
abstract class AbstractJavaResourceMethodDispatcher implements ResourceMethodDispatcher {
@Inject
private javax.inject.Provider validatorProvider;
private final Method method;
private final InvocationHandler methodHandler;
private Invocable resourceMethod;
/**
* Initialize common java resource method dispatcher structures.
*
* @param resourceMethod invocable resource class Java method.
* @param methodHandler method invocation handler.
*/
AbstractJavaResourceMethodDispatcher(Invocable resourceMethod, InvocationHandler methodHandler) {
this.method = resourceMethod.getHandlingMethod();
this.methodHandler = methodHandler;
this.resourceMethod = resourceMethod;
}
@Override
public final Response dispatch(Object resource, Request request) throws ProcessingException {
// TODO measure time spent in invocation
return doDispatch(resource, request);
}
/**
* Dispatching functionality to be implemented by a concrete dispatcher
* implementation sub-class.
*
* @param resource resource class instance.
* @param request request to be dispatched.
* @return response for the dispatched request.
* @throws ProcessingException in case of a processing error.
* @see ResourceMethodDispatcher#dispatch(java.lang.Object, javax.ws.rs.core.Request)
*/
protected abstract Response doDispatch(Object resource, Request request) throws ProcessingException;
/**
* Use the underlying invocation handler to invoke the underlying Java method
* with the supplied input method argument values on a given resource instance.
*
* @param resource resource class instance.
* @param args input argument values for the invoked Java method.
* @return invocation result.
* @throws ProcessingException (possibly {@link MappableException mappable})
* container exception in case the invocation failed.
*/
final Object invoke(Object resource, Object... args) throws ProcessingException {
try {
final ConfiguredValidator validator = validatorProvider.get();
// Validate resource class & method input parameters.
if (validator != null) {
validator.validateResourceAndInputParams(resource, resourceMethod, args);
}
final Object invocationResult = methodHandler.invoke(resource, method, args);
// Validate response entity.
if (validator != null) {
validator.validateResult(resource, resourceMethod, invocationResult);
}
return invocationResult;
} catch (IllegalAccessException ex) {
throw new ProcessingException("Resource Java method invocation error.", ex);
} catch (InvocationTargetException ex) {
final Throwable cause = ex.getCause();
// exception cause potentially mappable
throw new MappableException(cause);
} catch (UndeclaredThrowableException ex) {
throw new ProcessingException("Resource Java method invocation error.", ex);
} catch (ProcessingException ex) {
throw ex;
} catch (Exception ex) {
// exception potentially mappable
throw new MappableException(ex);
} catch (Throwable t) {
throw new ProcessingException(t);
}
}
@Override
public String toString() {
return method.toString();
}
}