org.talika.tarsis.filters
Class AbstractFilter

java.lang.Object
  org.talika.tarsis.filters.AbstractFilter

All Implemented Interfaces:

javax.servlet.Filter

Direct Known Subclasses:

CommandFilter, GZIPFilter, MultipartRequestFilter

public abstract class AbstractFilter
extends java.lang.Object
implements javax.servlet.Filter

Base implementation of Filter interface for all web application filters of Tarsis MV Framework architecture.

Version:

$Revision: 269 $

Author:

Jose M. Palomar

Constructor Summary

AbstractFilter()

Method Summary

void	destroy() Called by the web container to indicate to a filter that it is being taken out of service.
abstract void	doFilter(javax.servlet.ServletRequest servletRequest, javax.servlet.ServletResponse servletResponse, javax.servlet.FilterChain filterChain) The doFilter method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain.
protected Context	getContext() Returns the Tarsis context.
protected javax.servlet.FilterConfig	getFilterConfig() Returns filter configuration.
protected Logger	getLogger() Returns the Tarsis logger.
void	init(javax.servlet.FilterConfig filterConfig) Called by the web container to indicate to a filter that it is being placed into service.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractFilter

public AbstractFilter()

Method Detail

init

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

Called by the web container to indicate to a filter that it is being placed into service.

Base initialization consits in obtaining Tarsis context from servlet context, and saving filter configuration, Tarsis context and Tarsis logger for further use.

Specified by:

init in interface javax.servlet.Filter

Parameters:

filterConfig - FilterConfig filter configutarion.

Throws:

javax.servlet.ServletException - if an exception has occurred that interferes with the filter's normal operation

See Also:

Filter.init(FilterConfig)

destroy

public void destroy()

Called by the web container to indicate to a filter that it is being taken out of service.

Specified by:

destroy in interface javax.servlet.Filter

See Also:

Filter.destroy()

doFilter

public abstract void doFilter(javax.servlet.ServletRequest servletRequest,
                              javax.servlet.ServletResponse servletResponse,
                              javax.servlet.FilterChain filterChain)
                       throws java.io.IOException,
                              javax.servlet.ServletException

The doFilter method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain.

Specified by:

doFilter in interface javax.servlet.Filter

Parameters:

servletRequest - ServletRequest the ServletRequest object that contains the client's request.

servletResponse - ServletResponse the ServletResponse object that contains the servlet's response.

filterChain - FilterChain invocation chain of filtered request.

Throws:

java.io.IOException - if an input or output exception occurs.

javax.servlet.ServletException - if an exception has occurred that interferes with the filter's normal operation

See Also:

Filter.doFilter(ServletRequest, ServletResponse, FilterChain)

getFilterConfig

protected final javax.servlet.FilterConfig getFilterConfig()

Returns filter configuration.

Returns:

FilterConfig filter configuration.

getContext

protected final Context getContext()

Returns the Tarsis context.

Returns:

Context the Tarsis context.

getLogger

protected final Logger getLogger()

Returns the Tarsis logger.

Returns:

Logger the Tarsis logger.