/*
 * $Id$
 *
 * 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 org.apache.struts2.portlet;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.portlet.dispatcher.DispatcherServlet;

/**
 * Interface defining some constants used in the Struts portlet implementation
 *
 */
public interface PortletActionConstants {
    /**
     * Default action name to use when no default action has been configured in the portlet
     * init parameters.
     */
    String DEFAULT_ACTION_NAME = "default";

    /**
     * Action name parameter name
     */
    String ACTION_PARAM = "struts.portlet.action";

    /**
     * Key for parameter holding the last executed portlet mode.
     */
    String MODE_PARAM = "struts.portlet.mode";

    /**
     * Key used for looking up and storing the portlet phase
     */
    String PHASE = "struts.portlet.phase";

    /**
     * Constant used for the render phase (
     * {@link javax.portlet.Portlet#render(javax.portlet.RenderRequest, javax.portlet.RenderResponse)})
     */
    Integer RENDER_PHASE = new Integer(1);

    /**
     * Constant used for the event phase (
     * {@link javax.portlet.Portlet#processAction(javax.portlet.ActionRequest, javax.portlet.ActionResponse)})
     */
    Integer EVENT_PHASE = new Integer(2);

    /**
     * Key used for looking up and storing the
     * {@link javax.portlet.PortletRequest}
     */
    String REQUEST = "struts.portlet.request";

    /**
     * Key used for looking up and storing the
     * {@link javax.portlet.PortletResponse}
     */
    String RESPONSE = "struts.portlet.response";

    /**
     * Key used for looking up and storing the action that was invoked in the event phase.
     */
    String EVENT_ACTION = "struts.portlet.eventAction";

    /**
     * Key used for looking up and storing the
     * {@link javax.portlet.PortletConfig}
     */
    String PORTLET_CONFIG = "struts.portlet.config";

    /**
     * Name of the action used as error handler
     */
    String ERROR_ACTION = "errorHandler";

    /**
     * Key for the portlet namespace stored in the
     * {@link org.apache.struts2.portlet.context.PortletActionContext}.
     */
    String PORTLET_NAMESPACE = "struts.portlet.portletNamespace";

    /**
     * Key for the mode-to-namespace map stored in the
     * {@link org.apache.struts2.portlet.context.PortletActionContext}.
     */
    String MODE_NAMESPACE_MAP = "struts.portlet.modeNamespaceMap";

    /**
     * Key for the default action name for the portlet, stored in the
     * {@link org.apache.struts2.portlet.context.PortletActionContext}.
     */
    String DEFAULT_ACTION_FOR_MODE = "struts.portlet.defaultActionForMode";
    
    /**
     * Key for request attribute indicating if the action has been reset. 
     */
    String ACTION_RESET = "struts.portlet.actionReset";
    
    /**
     * Key for session attribute indicating the location of the render direct action.
     */
    String RENDER_DIRECT_LOCATION = "struts.portlet.renderDirectLocation";
    
    /**
     * Key for the dispatch instruction for the {@link DispatcherServlet}
     */
	String DISPATCH_TO = "struts.portlet.dispatchTo";
	
	/**
	 * Session key where the value stack from the event phase is stored.
	 */
	String STACK_FROM_EVENT_PHASE = "struts.portlet.valueStackFromEventPhase";

	/**
	 * Default name of dispatcher servlet in web.xml
	 */
	String DEFAULT_DISPATCHER_SERVLET_NAME = "Struts2PortletDispatcherServlet";
	
	/**
	 * Key for the action mapping in the context
    */
	String ACTION_MAPPING = ServletActionContext.ACTION_MAPPING;
}