/**
* Construct a new ApplicationFilterConfig for the specified filter definition.
*
* @param context The context with which we are associated
* @param filterDef Filter definition for which a FilterConfig is to be constructed
* @exception ClassCastException if the specified class does not implement the <code>
* javax.servlet.Filter</code> interface
* @exception ClassNotFoundException if the filter class cannot be found
* @exception IllegalAccessException if the filter class cannot be publicly instantiated
* @exception InstantiationException if an exception occurs while instantiating the filter object
* @exception ServletException if thrown by the filter's init() method
* @throws NamingException
* @throws InvocationTargetException
*/
ApplicationFilterConfig(Context context, FilterDef filterDef)
throws ClassCastException, ClassNotFoundException, IllegalAccessException,
InstantiationException, ServletException, InvocationTargetException, NamingException {
super();
this.context = context;
setFilterDef(filterDef);
if (filterDef.getFilter() != null) {
this.filter = filterDef.getFilter();
getInstanceManager().newInstance(filter);
initFilter();
}
}
/**
* Set the filter definition we are configured for. This has the side effect of instantiating an
* instance of the corresponding filter class.
*
* @param filterDef The new filter definition
* @exception ClassCastException if the specified class does not implement the <code>
* javax.servlet.Filter</code> interface
* @exception ClassNotFoundException if the filter class cannot be found
* @exception IllegalAccessException if the filter class cannot be publicly instantiated
* @exception InstantiationException if an exception occurs while instantiating the filter object
* @exception ServletException if thrown by the filter's init() method
* @throws NamingException
* @throws InvocationTargetException
*/
void setFilterDef(FilterDef filterDef)
throws ClassCastException, ClassNotFoundException, IllegalAccessException,
InstantiationException, ServletException, InvocationTargetException, NamingException {
this.filterDef = filterDef;
if (filterDef == null) {
// Release any previously allocated filter instance
if (this.filter != null) {
if (Globals.IS_SECURITY_ENABLED) {
try {
SecurityUtil.doAsPrivilege("destroy", filter);
} catch (java.lang.Exception ex) {
context.getLogger().error("ApplicationFilterConfig.doAsPrivilege", ex);
}
SecurityUtil.remove(filter);
} else {
filter.destroy();
}
if (!context.getIgnoreAnnotations()) {
try {
((StandardContext) context).getInstanceManager().destroyInstance(this.filter);
} catch (Exception e) {
Throwable t = ExceptionUtils.unwrapInvocationTargetException(e);
ExceptionUtils.handleThrowable(t);
context.getLogger().error("ApplicationFilterConfig.preDestroy", t);
}
}
}
this.filter = null;
} else {
// Allocate a new filter instance if necessary
if (filterDef.getFilter() == null) {
getFilter();
}
}
}