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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.context;

import jakarta.faces.context.ExceptionHandler;
import jakarta.faces.context.ExceptionHandlerWrapper;
import jakarta.faces.context.FacesContext;

public class AjaxNoAjaxExceptionHandler extends ExceptionHandlerWrapper {

    private final AjaxExceptionHandlerImpl ajaxExceptionHandlerImpl;

    public AjaxNoAjaxExceptionHandler(AjaxExceptionHandlerImpl ajaxExceptionHandlerImpl, ExceptionHandlerImpl exceptionHandlerImpl) {
        super(exceptionHandlerImpl);
        this.ajaxExceptionHandlerImpl = ajaxExceptionHandlerImpl;
    }

    @Override
    public ExceptionHandler getWrapped() {
        FacesContext fc = FacesContext.getCurrentInstance();
        if (null != fc && fc.getPartialViewContext().isAjaxRequest()) {
            return ajaxExceptionHandlerImpl;
        }
        return super.getWrapped();

    }

}