/*
 * 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.
 *
 * $Header:$
 */
package org.apache.beehive.netui.pageflow.handler;

import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;

import org.apache.beehive.netui.pageflow.FlowController;

import java.io.IOException;


/**
 * Handler for exception processing.
 */
public interface ExceptionsHandler
    extends Handler
{
    ActionForward handleException( FlowControllerHandlerContext context, Throwable ex, ActionMapping actionMapping,
                                   ActionForm form )
        throws IOException, ServletException;

    Throwable unwrapException( FlowControllerHandlerContext context, Throwable ex );

    void exposeException( FlowControllerHandlerContext context, Throwable ex, ActionMapping actionMapping );

    boolean eatUnhandledException( FlowControllerHandlerContext context, Throwable ex );
}
