org.chwf.servlet.filter
Class CompositeFilter

java.lang.Object
  |
  +--org.chwf.servlet.filter.CompositeFilter

All Implemented Interfaces:

javax.servlet.Filter

Direct Known Subclasses:

CommandFilter, ViewFilter

public class CompositeFilter

extends java.lang.Object

implements javax.servlet.Filter

Filter that composes a set of other filters, to simplify filter configuration. When the composite filter is invoked, it invokes all the composed filters in turn. When the composite filter chain is complete, it continues with the original filter chain.

The configuration file for the composite filter is loaded from the classpath. The file name is always ClassName-filter.xml. It uses the same configuration as the FilterMicroContainer, but URL patterns are ignored; all filters are always invoked.

Author:

Paul Strack

Constructor Summary

CompositeFilter()

Method Summary

void	destroy() Destroys all composite filters.
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain) Invokes all the composite filters in order, then continues with the original chain.
void	init(javax.servlet.FilterConfig config) Initializes the composed filters, using the ClassName-filter.xml configuration file.

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositeFilter

public CompositeFilter()

Method Detail

init

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

Initializes the composed filters, using the ClassName-filter.xml configuration file.

Specified by:

init in interface javax.servlet.Filter

Parameters:

config - The filter config.

Throws:

javax.servlet.ServletException - If composed filters cannot be initialized.

doFilter

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

Invokes all the composite filters in order, then continues with the original chain.

Specified by:

doFilter in interface javax.servlet.Filter

Parameters:

request - The request.

response - The response.

chain - The original filter chain.

Throws:

javax.servlet.ServletException - For servlet errors.

java.io.IOException - For I/O errors.

destroy

public void destroy()

Destroys all composite filters.

Specified by:

destroy in interface javax.servlet.Filter