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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 jakarta.faces.component;

import jakarta.el.MethodExpression;

/**
 * 
 * ActionSource2 extends {@link ActionSource} and provides a JavaBeans
 * "action" property. The type of this property is a {@link MethodExpression}.
 * This allows the ActionSource concept to leverage the Jakarta Expression Language API.
 * 
 *
 * @since 1.2
 * @deprecated Use {@link ActionSource} instead.
 */
@Deprecated(since = "4.1", forRemoval = true)
public interface ActionSource2 extends ActionSource {

    // -------------------------------------------------------------- Properties

    /**
     * 
     * Return the {@link MethodExpression} pointing at the application action to be invoked, if this {@link UIComponent} is
     * activated by the user, during the Apply Request Values or Invoke Application phase of the request
     * processing lifecycle, depending on the value of the immediate property.
     * 
     *
     * @return the action expression.
     */
    MethodExpression getActionExpression();

    /**
     * 
     * Set the {@link MethodExpression} pointing at the appication action to be invoked, if this {@link UIComponent} is
     * activated by the user, during the Apply Request Values or Invoke Application phase of the request
     * processing lifecycle, depending on the value of the immediate property.
     * 
     *
     * 
     * Any method referenced by such an expression must be public, with a return type of String, and accept no
     * parameters.
     * 
     *
     * @param action The new method expression
     */
    void setActionExpression(MethodExpression action);

}