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Jakarta Faces defines an MVC framework for building user interfaces for web applications, including UI components, state management, event handing, input validation, page navigation, and support for internationalization and accessibility.

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/*
 * 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.spi;

/**
 * 
 * This interface defines an integration point for Jakarta EE vendors. Each vendor will need to provide an implementation
 * of this interface which will provide the Faces implementation the necessary hooks to perform resource injection.
 * 
 *
 * 
 * The implementation of this interface *must* be thread-safe and must provider either a no-arg constructor, or a
 * constructor accepting a ServletContext instance.
 * 
 */
public interface InjectionProvider {

    /**
     * 
     * The implementation of this method must perform the following steps:
     * 

     * Inject the supported resources per the Servlet 2.5 specification into the provided object
     * 
     * 
     * 
     * This method must not invoke any methods annotated with @PostConstruct
     *
     * @param managedBean the target managed bean
     * @throws InjectionProviderException if an error occurs during resource injection
     */
    void inject(Object managedBean) throws InjectionProviderException;

    /**
     * 

     * The implemenation of this method must invoke any method marked with the @PreDestroy annotation (per the
     * Common Annotations Specification).
     *
     * @param managedBean the target managed bean
     * @throws InjectionProviderException if an error occurs when invoking the method annotated by the
     * @PreDestroy annotation
     */
    void invokePreDestroy(Object managedBean) throws InjectionProviderException;

    /**
     * 
     * The implemenation of this method must invoke any method marked with the @PostConstruct annotation (per
     * the Common Annotations Specification).
     *
     * @param managedBean the target managed bean
     * @throws InjectionProviderException if an error occurs when invoking the method annotated by the
     * @PostConstruct annotation
     */
    void invokePostConstruct(Object managedBean) throws InjectionProviderException;

}