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 * 
 * Portions Copyright Apache Software Foundation.
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 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
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package org.apache.catalina.valves;


import java.io.IOException;
import javax.servlet.ServletException;
import org.apache.catalina.Request;
import org.apache.catalina.Response;


/**
 * Concrete implementation of <code>RequestFilterValve</code> that filters
 * based on the remote client's host name.
 *
 * @author Craig R. McClanahan
 * @version $Revision: 1.4 $ $Date: 2007/05/05 05:32:41 $
 */

public final class RemoteHostValve
    extends RequestFilterValve {


    // ----------------------------------------------------- Instance Variables


    /**
     * The descriptive information related to this implementation.
     */
    private static final String info =
        "org.apache.catalina.valves.RemoteHostValve/1.0";


    // ------------------------------------------------------------- Properties


    /**
     * Return descriptive information about this Valve implementation.
     */
    public String getInfo() {

        return (info);

    }


    // --------------------------------------------------------- Public Methods


    /**
     * Extract the desired request property, and pass it (along with the
     * specified request and response objects) to the protected
     * <code>process()</code> method to perform the actual filtering.
     * This method must be implemented by a concrete subclass.
     *
     * @param request The servlet request to be processed
     * @param response The servlet response to be created
     * @param context The valve context used to invoke the next valve
     *  in the current processing pipeline
     *
     * @exception IOException if an input/output error occurs
     * @exception ServletException if a servlet error occurs
     */
    public int invoke(Request request, Response response)
        throws IOException, ServletException {

        return process(request.getRequest().getRemoteHost(),
                request, response);

    }


}
