Package org.apache.catalina.filters

Class FilterBase

java.lang.Object

org.apache.catalina.filters.FilterBase

All Implemented Interfaces:

Filter

Direct Known Subclasses:

AddDefaultCharsetFilter, CsrfPreventionFilterBase, ExpiresFilter, FailedRequestFilter, HttpHeaderSecurityFilter, RemoteCIDRFilter, RequestFilter, SetCharacterEncodingFilter

public abstract class FilterBase
extends java.lang.Object
implements Filter

Base class for filters that provides generic initialisation and a simple no-op destruction.

Field Summary

Fields

Modifier and Type	Field	Description
protected static StringManager	sm

Constructor Summary

Constructors

Constructor	Description
FilterBase()

Method Summary

Modifier and Type	Method	Description
protected abstract Log	getLogger()
void	init(FilterConfig filterConfig)	Iterates over the configuration parameters and either logs a warning, or throws an exception for any parameter that does not have a matching setter in this filter.
protected boolean	isConfigProblemFatal()	Determines if an exception when calling a setter or an unknown configuration attribute triggers the failure of the this filter which in turn will prevent the web application from starting.

Methods inherited from interface javax.servlet.Filter

destroy, doFilter

Methods inherited from class java.lang.Object

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

Field Detail

sm

protected static final StringManager sm

Constructor Detail

FilterBase

public FilterBase()

Method Detail

getLogger

protected abstract Log getLogger()

init

public void init(FilterConfig filterConfig)
          throws ServletException

Iterates over the configuration parameters and either logs a warning, or throws an exception for any parameter that does not have a matching setter in this filter.

Specified by:

init in interface Filter

Parameters:

filterConfig - The configuration information associated with the filter instance being initialised

Throws:

ServletException - if isConfigProblemFatal() returns true and a configured parameter does not have a matching setter

isConfigProblemFatal

protected boolean isConfigProblemFatal()

Determines if an exception when calling a setter or an unknown configuration attribute triggers the failure of the this filter which in turn will prevent the web application from starting.

Returns:

true if a problem should trigger the failure of this filter, else false