/*

* 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.servlet;

import java.io.IOException;

/**

* A FilterChain is an object provided by the servlet container to the developer

* giving a view into the invocation chain of a filtered request for a resource.

* Filters use the FilterChain to invoke the next filter in the chain, or if the

* calling filter is the last filter in the chain, to invoke the resource at the

* end of the chain.

*

* @see Filter

* @since Servlet 2.3

**/

public interface FilterChain {

/**

* Causes the next filter in the chain to be invoked, or if the calling

* filter is the last filter in the chain, causes the resource at the end of

* the chain to be invoked.

*

* @param request

* the request to pass along the chain.

* @param response

* the response to pass along the chain.

*

* @throws IOException if an I/O error occurs during the processing of the

* request

* @throws ServletException if the processing fails for any other reason

* @since 2.3

*/

public void doFilter(ServletRequest request, ServletResponse response)

throws IOException, ServletException;

}