saxportlet.java

来自「jetspeed源代码」· Java 代码 · 共 108 行

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 *
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 */

package org.apache.jetspeed.portlet.xml;

import org.apache.jetspeed.portlet.Portlet;
import org.apache.jetspeed.portlet.PortletRequest;
import org.apache.jetspeed.portlet.PortletResponse;
import org.apache.jetspeed.portlet.PortletException;

import java.io.IOException;

/**
 ** The <CODE>SaxPortlet</CODE> is an abstract implementation of the
 ** <CODE>Portlet</CODE> that enables the use of SAX events to be sent
 ** as the response.
 **
 ** @see   SaxPortletRequest
 ** @see   SaxPortletResponse
 **
 ** @author   <A HREF="mailto:[e-mail]">Thomas F. Boehme</A>
 **/

public abstract class SaxPortlet implements Portlet
{
    public final void service (PortletRequest request,
                               PortletResponse response) throws PortletException,
                                                                IOException
    {
        if (response instanceof SaxPortletResponse)
        {
            service ((SaxPortletRequest) request,
                     (SaxPortletResponse) response);
        }
        else
        {
            // default implementation goes here
        }
    }

    /**
     ** This portlet maps the original <CODE>service()</CODE> call to this
     ** method. With the derived response, the two SAX handlers are
     ** accessible for sending SAX events as the response.
     **
     ** @param   request
     **          the stream portlet request
     ** @param   response
     **          the stream portlet response
     **/

    public abstract void service (SaxPortletRequest request,
                                  SaxPortletResponse response) throws PortletException,
                                                                         IOException;
}