com.sun.faces.application.view.ViewScopeContext Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.application.view;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.util.logging.Level;
import java.util.logging.Logger;
import jakarta.enterprise.context.ContextNotActiveException;
import jakarta.enterprise.context.spi.Context;
import jakarta.enterprise.context.spi.Contextual;
import jakarta.enterprise.context.spi.CreationalContext;
import jakarta.faces.component.UIViewRoot;
import jakarta.faces.context.FacesContext;
import jakarta.faces.view.ViewScoped;
/**
* The CDI context for CDI ViewScoped beans.
*/
public class ViewScopeContext implements Context, Serializable {
/**
* Stores the logger.
*/
private static final Logger LOGGER = Logger.getLogger(ViewScopeContext.class.getName());
/**
* Stores the serial version UID.
*/
private static final long serialVersionUID = -6245899073989073951L;
/**
* Constructor.
*/
public ViewScopeContext() {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(Level.FINEST, "Creating ViewScope CDI context");
}
}
/**
* Assert the context is active, otherwise throw ContextNotActiveException.
*/
@SuppressWarnings({ "FinalPrivateMethod" })
private final void assertNotReleased() {
if (!isActive()) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, "Trying to access ViewScope CDI context while it is not active");
}
throw new ContextNotActiveException();
}
}
/**
* Get the ViewScoped bean for the given contextual.
*
* @param the type.
* @param contextual the contextual.
* @return the view scoped bean, or null if not found.
*/
@Override
public T get(Contextual contextual) {
assertNotReleased();
T result = null;
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext != null) {
ViewScopeManager manager = ViewScopeManager.getInstance(facesContext);
if (manager != null) {
result = manager.getContextManager().getBean(facesContext, contextual);
}
}
return result;
}
/**
* Get the existing instance of the ViewScoped bean for the given contextual or create a new one.
*
* @param the type.
* @param contextual the contextual.
* @param creational the creational.
* @return the instance.
* @throws ContextNotActiveException when the context is not active.
*/
@Override
public T get(Contextual contextual, CreationalContext creational) {
assertNotReleased();
T result = get(contextual);
if (result == null) {
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext != null) {
ViewScopeManager manager = ViewScopeManager.getInstance(facesContext);
result = manager.getContextManager().getBean(facesContext, contextual);
if (result == null) {
result = manager.getContextManager().createBean(facesContext, contextual, creational);
}
}
}
return result;
}
/**
* Get the class of the scope object.
*
* @return the class.
*/
@Override
public Class getScope() {
return ViewScoped.class;
}
/**
* Determine if the context is active.
*
* @return true if there is a view root, false otherwise.
*/
@Override
public boolean isActive() {
boolean result = false;
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext != null) {
UIViewRoot viewRoot = facesContext.getViewRoot();
if (viewRoot != null) {
result = true;
}
}
return result;
}
}