br.com.caelum.vraptor.observer.InstantiateObserver Maven / Gradle / Ivy
/***
* 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.observer;
import br.com.caelum.vraptor.controller.ControllerInstance;
import br.com.caelum.vraptor.controller.DefaultControllerInstance;
import br.com.caelum.vraptor.events.ControllerFound;
import br.com.caelum.vraptor.ioc.Container;
import javax.enterprise.context.Dependent;
import javax.enterprise.context.RequestScoped;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.Produces;
import javax.inject.Inject;
import static com.google.common.base.Preconditions.checkState;
/**
* Instantiates the current instance of controller class.
*
* @author Guilherme Silveira
* @author Rodrigo Turini
*/
@RequestScoped
public class InstantiateObserver {
private final Container container;
private ControllerInstance controllerInstance;
@Inject
public InstantiateObserver(Container container) {
this.container = container;
}
/**
* @deprecated CDI eyes only
*/
protected InstantiateObserver(){
this(null);
}
public void instantiate(@Observes ControllerFound event) {
Object instance = container.instanceFor(event.getController().getType());
this.controllerInstance = new DefaultControllerInstance(instance);
}
@Produces @Dependent
public ControllerInstance getControllerInstance() {
checkState(controllerInstance != null, "ControllerInstance is not initialised yet");
return this.controllerInstance;
}
}