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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 Also:
Filter
Since:
Servlet 2.3/**
     * 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.
Params:
request – the request to pass along the chain.
response – the response to pass along the chain.
Throws:
IOException – if an I/O related error has occurred during the processing
ServletException – if an exception has occurred that interferes with the
                         filterChain's normal operation/**
     * 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 related error has occurred during the processing
     * @throws ServletException if an exception has occurred that interferes with the
     *                          filterChain's normal operation
     */
    public void doFilter(ServletRequest request, ServletResponse response) throws IOException, ServletException;

}