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* 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.apache.deltaspike.jsf.impl.scope.view;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.BeforeBeanDiscovery;
import javax.enterprise.inject.spi.Extension;
import javax.faces.bean.ViewScoped;
import org.apache.deltaspike.core.spi.activation.Deactivatable;
import org.apache.deltaspike.core.util.ClassDeactivationUtils;
import org.apache.deltaspike.jsf.impl.util.JsfUtils;
/**
* <p>This CDI extension enables support for the new JSF-2 @ViewScoped annotation.</p>
*
* <p>2 steps are necessary:</p>
* <ol>
* <li>We have to manually add the @ViewScoped annotation
* as a passivating {@link javax.enterprise.context.NormalScope},
* since this annotation is neither a JSR-330 annotation
* nor a JSR-299 annotation and therefor doesn't get picked up automatically. This has to be
* before the bean scanning starts.</li>
* <li>After the bean scanning succeeded, we register the
* {@link javax.enterprise.context.spi.Context} for the
* ViewScoped. The {@link ViewScopedContext} is responsible for actually storing all our
* @ViewScoped contextual instances in the JSF ViewMap.</li>
* </ol>
*/
public class ViewScopedExtension implements Extension, Deactivatable
{
private boolean isActivated = true;
/**
* javax.faces.bean.ViewScoped is no CDI Scope.
* We need to add it programmatically to CDI.
*/
public void addViewScoped(@Observes BeforeBeanDiscovery beforeBeanDiscovery)
{
isActivated = ClassDeactivationUtils.isActivated(getClass());
if (isActivated)
{
//this extension is only needed if the cdi-based view-scope handling isn't delegated to jsf 2.2+
isActivated = !JsfUtils.isViewScopeDelegationEnabled();
}
if (!isActivated)
{
return;
}
beforeBeanDiscovery.addScope(ViewScoped.class, true, true);
}
/**
* Register and start the ViewScopedContext.
*/
public void registerViewContext(@Observes AfterBeanDiscovery afterBeanDiscovery, BeanManager beanManager)
{
if (!isActivated)
{
return;
}
//X TODO check whether we still need this in EE6: CodiStartupBroadcaster.broadcastStartup();
afterBeanDiscovery.addContext(new ViewScopedContext(beanManager));
}
}