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/*
 * Copyright 2011-2020 PrimeFaces Extensions
 *
 * Licensed 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.primefaces.extensions.showcase.util;

import jakarta.el.ELContext;
import jakarta.faces.FacesException;
import jakarta.faces.context.FacesContext;

/**
 * Accessor for objects stored in several scopes via faces context {@link jakarta.faces.context.FacesContext}.
 *
 * @author ova / last modified by $Author$
 * @version $Revision$
 */
public class FacesAccessor {

    public static Object getManagedBean(final String beanName) {
        FacesContext fc = FacesContext.getCurrentInstance();

        Object bean;
        try {
            ELContext elContext = fc.getELContext();
            bean = elContext.getELResolver().getValue(elContext, null, beanName);
        }
        catch (RuntimeException e) {
            throw new FacesException(e.getMessage(), e);
        }

        if (bean == null) {
            throw new FacesException("Managed bean with name '" + beanName
                        + "' was not found. Check your faces-config.xml or @ManagedBean annotation.");
        }

        return bean;
    }

    public static String getRequestParameter(String name) {
        return (String) FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get(name);
    }
}