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/*
 * The MIT License
 *
 * Copyright (c) 2009-2023 PrimeTek Informatics
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.primefaces.application.exceptionhandler;

import java.beans.FeatureDescriptor;
import java.util.Iterator;
import javax.el.ELContext;
import javax.el.ELResolver;
import javax.faces.context.FacesContext;

public class PrimeExceptionHandlerELResolver extends ELResolver {

    public static final String EL_NAME = "pfExceptionHandler";

    @Override
    public Object getValue(ELContext elContext, Object base, Object property) {

        if (EL_NAME.equals(property)) {
            elContext.setPropertyResolved(true);

            FacesContext context = FacesContext.getCurrentInstance();
            ExceptionInfo info = (ExceptionInfo) context.getAttributes().get(ExceptionInfo.ATTRIBUTE_NAME);

            if (info == null) {
                info = (ExceptionInfo) context.getExternalContext().getSessionMap().get(ExceptionInfo.ATTRIBUTE_NAME);
            }

            return info;
        }

        return null;
    }

    @Override
    public Class getType(ELContext context, Object base, Object property) {
        return null;
    }

    @Override
    public void setValue(ELContext context, Object base, Object property, Object value) {
        // readonly
    }

    @Override
    public boolean isReadOnly(ELContext context, Object base, Object property) {
        return true;
    }

    @Override
    public Iterator getFeatureDescriptors(ELContext context, Object base) {
        return null;
    }

    @Override
    public Class getCommonPropertyType(ELContext context, Object base) {
        return null;
    }
}