filterchain.java

业界著名的tomcat服务器的最新6.0的源代码。

/*
* 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.
	*
	* @since 2.3
	*/
	
    public void doFilter ( ServletRequest request, ServletResponse response ) throws IOException, ServletException;

}