Field Detail

• COPYRIGHT

  public static final java.lang.String COPYRIGHT
  

  IBM copyright notice field.

  See Also:

  Constant Field Values

Constructor Detail

• PreviewFilter

  public PreviewFilter()
  

  This is the default constructor for this class. It calls the constructor from the superclass.

Method Detail

• init

  public void init(javax.servlet.FilterConfig filterConfiguration)
            throws javax.servlet.ServletException
  

  This method initializes the preview filter. There is no initialization required for this preview filter so no operation is performed.

  Specified by:

  init in interface javax.servlet.Filter

  Parameters:

  filterConfiguration - The filter configuration.

  Throws:

  javax.servlet.ServletException - This is thrown if there is a problem during filter initialization. This will never happen since no initialization steps are required.

  See Also:

  Filter.init(javax.servlet.FilterConfig)

• doFilter

  public void doFilter(javax.servlet.ServletRequest request,
              javax.servlet.ServletResponse response,
              javax.servlet.FilterChain filterChain)
                throws java.io.IOException,
                       javax.servlet.ServletException
  

  This method performs the preview operation before the request is processed. This filter sets the request as uncachable so the response will not be cached. It then forwards the request on to the next filter in the filter chain.

  Specified by:

  doFilter in interface javax.servlet.Filter

  Parameters:

  request - The servlet request.

  response - The servlet response.

  filterChain - The filter chain.

  Throws:

  java.io.IOException - This is thrown if a problem occurs when writing the response.

  javax.servlet.ServletException - This is thrown if a problem occurs while handling the request.

  See Also:

  Filter.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)

• destroy

  public void destroy()
  

  This method performs and deinitializes operations when the filter is being shut down. This filter does not require any shutdown clean so no operations are performed.

  Specified by:

  destroy in interface javax.servlet.Filter

  See Also:

  Filter.destroy()