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EE4J Compatible Implementation for Jakarta Faces API
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/*
 * Copyright (c) 1997, 2018 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 static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.AlwaysPerformValidationWhenRequiredTrue;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.EnableValidateWholeBean;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.ForceAlwaysWriteFlashCookie;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.PartialStateSaving;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.ViewRootPhaseListenerQueuesException;

import java.util.Map;

import javax.faces.FacesException;
import javax.faces.FactoryFinder;
import javax.faces.component.UIComponent;
import javax.faces.context.ExceptionHandlerFactory;
import javax.faces.context.ExternalContext;
import javax.faces.context.ExternalContextFactory;
import javax.faces.context.FacesContext;
import javax.faces.context.FacesContextFactory;
import javax.faces.lifecycle.Lifecycle;

import com.sun.faces.RIConstants;
import com.sun.faces.config.WebConfiguration;
import com.sun.faces.facelets.impl.DefaultResourceResolver;
import com.sun.faces.util.Util;
import javax.faces.component.UIInput;

public class FacesContextFactoryImpl extends FacesContextFactory {



    private final ExceptionHandlerFactory exceptionHandlerFactory;
    private final ExternalContextFactory externalContextFactory;


    // ------------------------------------------------------------ Constructors


    public FacesContextFactoryImpl() {
        super(null);

        exceptionHandlerFactory = (ExceptionHandlerFactory)
              FactoryFinder.getFactory(FactoryFinder.EXCEPTION_HANDLER_FACTORY);
        externalContextFactory = (ExternalContextFactory)
              FactoryFinder.getFactory(FactoryFinder.EXTERNAL_CONTEXT_FACTORY);

    }


    // ---------------------------------------- Methods from FacesContextFactory


    @Override
    public FacesContext getFacesContext(Object sc,
                                        Object request,
                                        Object response,
                                        Lifecycle lifecycle)
    throws FacesException {

        Util.notNull("sc", sc);
        Util.notNull("request", request);
        Util.notNull("response", response);
        Util.notNull("lifecycle", lifecycle);
        ExternalContext extContext;

        FacesContext ctx =
              new FacesContextImpl(
                  extContext = externalContextFactory.getExternalContext(sc, request, response),
                  lifecycle);

        ctx.setExceptionHandler(exceptionHandlerFactory.getExceptionHandler());
        WebConfiguration webConfig = WebConfiguration.getInstance(extContext);

        savePerRequestInitParams(ctx, webConfig);
        return ctx;

    }

    /*
     * Copy the value of any init params that must be checked during
     * this request to our FacesContext attribute map.
     */
    private void savePerRequestInitParams(FacesContext context, WebConfiguration webConfig) {
        ExternalContext extContext = context.getExternalContext();
        Map appMap = extContext.getApplicationMap();
        String val = extContext.getInitParameter(UIComponent.HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME);
        boolean setCurrentComponent = Boolean.valueOf(val);
        Map attrs = context.getAttributes();
        attrs.put(UIInput.ALWAYS_PERFORM_VALIDATION_WHEN_REQUIRED_IS_TRUE,
                webConfig.isOptionEnabled(AlwaysPerformValidationWhenRequiredTrue) ?
                Boolean.TRUE : Boolean.FALSE);
        attrs.put(UIComponent.HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME,
                setCurrentComponent ? Boolean.TRUE : Boolean.FALSE);
        attrs.put(PartialStateSaving, webConfig.isOptionEnabled(PartialStateSaving) ?
                Boolean.TRUE : Boolean.FALSE);
        attrs.put(ForceAlwaysWriteFlashCookie, webConfig.isOptionEnabled(ForceAlwaysWriteFlashCookie) ?
                Boolean.TRUE : Boolean.FALSE);
        // We must use getQualifiedName here because the consumer is in jsf-api
        // and thus cannot import the enum.
        attrs.put(ViewRootPhaseListenerQueuesException.getQualifiedName(), webConfig.isOptionEnabled(ViewRootPhaseListenerQueuesException) ?
                Boolean.TRUE : Boolean.FALSE);
        attrs.put(EnableValidateWholeBean.getQualifiedName(), webConfig.isOptionEnabled(EnableValidateWholeBean) ?
                Boolean.TRUE : Boolean.FALSE);

        Object nonDefaultResourceResolver = extContext.getApplicationMap().get(DefaultResourceResolver.NON_DEFAULT_RESOURCE_RESOLVER_PARAM_NAME);
        if (null != nonDefaultResourceResolver) {
            attrs.put(DefaultResourceResolver.NON_DEFAULT_RESOURCE_RESOLVER_PARAM_NAME, nonDefaultResourceResolver);
        }
        String facesConfigVersion = "" + appMap.get(RIConstants.FACES_CONFIG_VERSION);
        attrs.put(RIConstants.FACES_CONFIG_VERSION, facesConfigVersion);
    }

    // The testcase for this class is TestSerlvetFacesContextFactory.java

} // end of class FacesContextFactoryImpl