PluginFilter (DHD Multimedia Gallery V1.57.21 Javadoc)

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org.hd.d.pg2k.webSvr.util
Class PluginFilter

java.lang.Object
  org.hd.d.pg2k.webSvr.util.PluginFilter

All Implemented Interfaces:: javax.servlet.Filter

public final class PluginFilter
extends java.lang.Object
implements javax.servlet.Filter
extends java.lang.Object
implements javax.servlet.Filter

Filter to dynamically load and wrap a pluggable filter. This enables filters to be loaded entirely at runtime.

The param pluginClassName is used to give the class name of a Filter class to load and pass filter calls on to. If this class cannot be found or loaded, or is not specified, this PluginFilter performs no transformations at all.

Field Summary
`private javax.servlet.FilterConfig`	`config` The filter configuration object we are associated with.
`private javax.servlet.Filter`	`plugin` Our plug-in class; or null if none loaded.
`private java.lang.String`	`pluginClassName` Config parameter; name of flag to record overload, or null if none chosen.

Constructor Summary
`PluginFilter()`

Method Summary
`void`	`destroy()` Take this filter out of service.
`void`	`doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)` Called to handle each request.
`void`	`init(javax.servlet.FilterConfig filterConfig)` Place this filter into service.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

config

private javax.servlet.FilterConfig config

The filter configuration object we are associated with. If this value is null, this filter instance is not currently configured.

pluginClassName

private java.lang.String pluginClassName

Config parameter; name of flag to record overload, or null if none chosen.

plugin

private javax.servlet.Filter plugin

Our plug-in class; or null if none loaded.

Constructor Detail

PluginFilter

public PluginFilter()

Method Detail

init

public void init(javax.servlet.FilterConfig filterConfig)

Place this filter into service. Defer starting the timer until the first activity that we see...

Specified by:: init in interface javax.servlet.Filter

Parameters:: filterConfig - the filter configuration object

destroy

public void destroy()

Take this filter out of service.

Specified by:: destroy in interface javax.servlet.Filter

doFilter

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

Called to handle each request.

Specified by:: doFilter in interface javax.servlet.Filter

Throws:: java.io.IOException; javax.servlet.ServletException