/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 javax.faces.context;

import javax.faces.application.FacesMessage;
import java.util.Iterator;

/**
 * see Javadoc of <a href="http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/api/index.html">JSF Specification</a>
 *
 * @author Manfred Geiler (latest modification by $Author$)
 * @version $Revision$ $Date$
 */
public abstract class FacesContext
{
    public abstract javax.faces.application.Application getApplication();

    public abstract Iterator getClientIdsWithMessages();

    public abstract javax.faces.context.ExternalContext getExternalContext();

    public abstract FacesMessage.Severity getMaximumSeverity();

    public abstract Iterator getMessages();

    public abstract Iterator getMessages(String clientId);

    public abstract javax.faces.render.RenderKit getRenderKit();

    public abstract boolean getRenderResponse();

    public abstract boolean getResponseComplete();

    public abstract javax.faces.context.ResponseStream getResponseStream();

    public abstract void setResponseStream(javax.faces.context.ResponseStream responseStream);

    public abstract javax.faces.context.ResponseWriter getResponseWriter();

    public abstract void setResponseWriter(javax.faces.context.ResponseWriter responseWriter);

    public abstract javax.faces.component.UIViewRoot getViewRoot();

    public abstract void setViewRoot(javax.faces.component.UIViewRoot root);

    public abstract void addMessage(String clientId,
                                    javax.faces.application.FacesMessage message);

    public abstract void release();

    public abstract void renderResponse();

    public abstract void responseComplete();


    private static ThreadLocal _currentInstance = new ThreadLocal()
    {
        protected Object initialValue()
        {
            return null;
        }
    };

    public static FacesContext getCurrentInstance()
    {
        return (FacesContext)_currentInstance.get();
    }

    protected static void setCurrentInstance(javax.faces.context.FacesContext context)
    {
        //todo: enable this when JDK1.5 is available: _currentInstance.remove();
        _currentInstance.set(context);

    }
}