atg.droplet
Class IsNull

java.lang.Object
  atg.nucleus.logging.VariableArgumentApplicationLoggingImpl
      atg.nucleus.GenericService
          atg.nucleus.TimedOperationService
              atg.nucleus.servlet.ServletService
                  atg.nucleus.servlet.HttpServletService
                      atg.servlet.DynamoServlet
                          atg.droplet.IsNull

All Implemented Interfaces:

NameContextBindingListener, NameContextElement, NameResolver, AdminableService, ApplicationLogging, atg.nucleus.logging.ApplicationLoggingSender, atg.nucleus.logging.TraceApplicationLogging, atg.nucleus.logging.VariableArgumentApplicationLogging, ComponentNameResolver, Service, ServiceListener, ParameterServlet, java.util.EventListener, javax.servlet.Servlet

public class IsNull
extends DynamoServlet

The IsNull droplet conditionally servlet renders one of its parameters based on the value of its value parameter. If the value is null then the output parameter true is rendered, otherwise the output parameter false is serviced.

For Example:

<droplet bean="/atg/dynamo/droplet/IsNull"> <param name="value" value="param:someobject"> <oparam name="true">Some object is null</oparam> <oparam name="false">Some object is NOT null</oparam> </droplet>

Field Summary

static java.lang.String	CLASS_VERSION Class version string
static ParameterName	FALSE
static ParameterName	TRUE
static ParameterName	VALUE

Fields inherited from class atg.servlet.DynamoServlet

mAllowCleanupRequest, mParameters

Fields inherited from class atg.nucleus.servlet.ServletService

SERVLET_INFO_KEY

Fields inherited from class atg.nucleus.GenericService

SERVICE_INFO_KEY

Fields inherited from interface atg.nucleus.logging.TraceApplicationLogging

DEFAULT_LOG_TRACE_STATUS

Fields inherited from interface atg.nucleus.logging.ApplicationLogging

DEFAULT_LOG_DEBUG_STATUS, DEFAULT_LOG_ERROR_STATUS, DEFAULT_LOG_INFO_STATUS, DEFAULT_LOG_WARNING_STATUS

Constructor Summary

IsNull()
Constructs an instanceof IsNull

Method Summary

void	service(DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Render the isNull switch

Methods inherited from class atg.servlet.DynamoServlet

doDelete, doGet, doPost, doPut, getParameter, getParameters, getServletContext, service, service, setParameter

Methods inherited from class atg.nucleus.servlet.ServletService

destroy, getServletConfig, getServletInfo, init, setServletInfo

Methods inherited from class atg.nucleus.TimedOperationService

getAverageRequestHandlingTime, getHandledRequestCount, getRequestStartTime, getTotalRequestHandlingTime, isKeepingStatistics, notifyHandledRequest, resetStatistics, setKeepingStatistics

Methods inherited from class atg.nucleus.GenericService

addLogListener, createAdminServlet, doStartService, doStopService, getAbsoluteName, getAdminServlet, getLoggingForVlogging, getLogListenerCount, getLogListeners, getName, getNameContext, getNucleus, getRoot, getServiceConfiguration, getServiceInfo, isLoggingDebug, isLoggingError, isLoggingInfo, isLoggingTrace, isLoggingWarning, isRunning, logDebug, logDebug, logDebug, logError, logError, logError, logInfo, logInfo, logInfo, logTrace, logTrace, logTrace, logWarning, logWarning, logWarning, nameContextElementBound, nameContextElementUnbound, removeLogListener, resolveName, resolveName, resolveName, resolveName, sendLogEvent, setLoggingDebug, setLoggingError, setLoggingInfo, setLoggingTrace, setLoggingWarning, setNucleus, setServiceInfo, startService, stopService

Methods inherited from class atg.nucleus.logging.VariableArgumentApplicationLoggingImpl

vlogDebug, vlogDebug, vlogDebug, vlogDebug, vlogError, vlogError, vlogError, vlogError, vlogInfo, vlogInfo, vlogInfo, vlogInfo, vlogTrace, vlogTrace, vlogTrace, vlogTrace, vlogWarning, vlogWarning, vlogWarning, vlogWarning

Methods inherited from class java.lang.Object

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

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

Class version string

VALUE

public static final ParameterName VALUE

TRUE

public static final ParameterName TRUE

FALSE

public static final ParameterName FALSE

Constructor Detail

IsNull

public IsNull()

Constructs an instanceof IsNull

Method Detail

service

public void service(DynamoHttpServletRequest pRequest,
                    DynamoHttpServletResponse pResponse)
             throws javax.servlet.ServletException,
                    java.io.IOException

Render the isNull switch

Overrides:

service in class DynamoServlet

Parameters:

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

javax.servlet.ServletException - an application specific error occurred processing this request

java.io.IOException - an error occurred reading data from the request or writing data to the response.