/**
* 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.jooby.internal.mvc;
import static java.util.Objects.requireNonNull;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import org.jooby.Request;
import org.jooby.Response;
import org.jooby.Route;
import org.jooby.Status;
import com.google.common.base.Throwables;
public class MvcHandler implements Route.MethodHandler {
private Method handler;
private RequestParamProvider provider;
public MvcHandler(final Method handler, final RequestParamProvider provider) {
this.handler = requireNonNull(handler, "Handler method is required.");
this.provider = requireNonNull(provider, "Param prodiver is required.");
}
@Override
public Method method() {
return handler;
}
@Override
public void handle(final Request req, final Response rsp) throws Throwable {
Object result = invoke(req, rsp);
Class<?> returnType = handler.getReturnType();
if (returnType == void.class) {
rsp.status(Status.NO_CONTENT);
return;
}
rsp.status(Status.OK);
rsp.send(result);
}
public Object invoke(final Request req, final Response rsp) throws Throwable {
try {
Object target = req.require(handler.getDeclaringClass());
List<RequestParam> parameters = provider.parameters(handler);
Object[] args = new Object[parameters.size()];
for (int i = 0; i < parameters.size(); i++) {
args[i] = parameters.get(i).value(req, rsp);
}
final Object result = handler.invoke(target, args);
return result;
} catch (InvocationTargetException ex) {
Throwable cause = ex.getCause();
Throwables.propagateIfInstanceOf(cause, Exception.class);
throw Throwables.propagate(cause);
}
}
}