atg.droplet

Class Range

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.Range

All Implemented Interfaces:

atg.core.logging.Logging, atg.core.logging.TraceLogging, atg.naming.AbsoluteNameable, NameContextBindingListener, NameContextElement, atg.naming.NameContextParentable, NameResolver, AdminableService, atg.nucleus.Configured, ApplicationLogging, atg.nucleus.logging.ApplicationLoggingSender, atg.nucleus.logging.TraceApplicationLogging, VariableArgumentApplicationLogging, ComponentNameResolver, Service, ServiceListener, ParameterServlet, java.util.EventListener, javax.servlet.Servlet

Direct Known Subclasses:

RQLQueryRange, SQLQueryRange

public class Range
extends DynamoServlet

This servlet renders its output parameter for a subset of elements in its array parameter. In particular, howMany items starting at (1-based) index start are displayed. The array parameter can be general Collection (Vectors, Lists, Sets), Iterator, Enumeration, Map, Dictionary or an array.

Each iteration will set several parameters: index and count to the current loop index (0-based) and count (1-based), respectively; element to the value of that element of the array; hasPrev and hasNext to indicate whether there are array items before or after the current subset, respectively; plus several others to help render the previous or next range of elements.

A complete description of the parameters to the Range droplet are:

array

The parameter that defines the list of items to output. This parameter can be a general Collection (Vectors, Lists, Sets), Iterator, Enumeration, Map, Dictionary or an array.

start

Specifies the starting index (1-based). For example, to start at the beginning of the array, set start to 1. If start points past the end of the array, the empty parameter will be rendered.

howMany

Specifies the number of items in the array set to display. If the combination of start and howMany point past the end of the array, rendering stops after the end of the array is reached.

outputStart

This parameter is rendered before any output tags if the subset of the array being displayed is not empty.

outputEnd

This parameter is rendered after all output tags if the subset of the array being displayed is not empty.

output

This parameter is rendered once for each element in the subset of the array that gets displayed.

empty

This optional parameter is rendered if the array itself, or the requested subset of the array, contains no elements.

index

This parameter is set to the (0-based) index of the current element of the array each time the output parameter is rendered. For example, if start is set to 1, the value of index for the first iteration is 0.

count

This parameter is set to the (1-based) count of the current element of the array each time the output parameter is rendered. For example, if start is set to 1, the value of count for the first iteration is 1.

element

This parameter is set to the current element of the array each time the output parameter is rendered.

key

This parameter is set once for each element in the array set if the array parameter refers to a Map or Dictionary.

end

This parameter is set before any of the output parameters are rendered. It indicates the (1-based) count of the last element in the current array set.

size

This parameter is set before any of the output parameters are rendered. It indicates the number of elements in the full array.

hasPrev

This parameter is set to true or false before any of the output parameters are rendered. It indicates whether there are any array items before the current array set.

prevStart

This parameter is set before any of the output parameters are rendered, and only if hasPrev is true. It indicates the value of start that should be used to display the previous array set.

prevEnd

This parameter is set before any of the output parameters are rendered, and only if hasPrev is true. It indicates the (1-based) count of the last element in the previous array set.

prevHowMany

This parameter is set before any of the output parameters are rendered, and only if hasPrev is true. It indicates the number of elements in the previous array set.

hasNext

This parameter is set to true or false before any of the output parameters are rendered. It indicates whether there are any array items after the current array set.

nextStart

This parameter is set before any of the output parameters are rendered, and only if hasNext is true. It indicates the value of start that should be used to display the next array set.

nextEnd

This parameter is set before any of the output parameters are rendered, and only if hasNext is true. It indicates the (1-based) count of the last element in the next array set.

nextHowMany

This parameter is set before any of the output parameters are rendered, and only if hasNext is true. It indicates the number of elements in the next array set.

reverseOrder

A boolean value that specifies whether the traversal order in the array should be back to front, or front to back. 'true' sorts from back to front. This parameter only takes effect if the sortProperties are not set.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ARRAY
static java.lang.String	CLASS_VERSION Class version string
static java.lang.String	COUNT
static java.lang.String	ELEMENT
static java.lang.String	ELEMENT_NAME
static java.lang.String	EMPTY
static java.lang.String	END
static java.lang.String	HAS_NEXT
static java.lang.String	HAS_PREV
static java.lang.String	HOW_MANY
static java.lang.String	INDEX
static java.lang.String	INDEX_NAME
static java.lang.String	KEY
static java.lang.String	NEXT_END
static java.lang.String	NEXT_HOW_MANY
static java.lang.String	NEXT_START
static java.lang.String	OUTPUT
static java.lang.String	OUTPUT_END
static java.lang.String	OUTPUT_START
static java.lang.String	PREV_END
static java.lang.String	PREV_HOW_MANY
static java.lang.String	PREV_START
static java.lang.String	SIZE
static java.lang.String	START

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

Constructors

Constructor and Description
Range()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	getArray(DynamoHttpServletRequest pRequest) Gets the array-like value (e.g., array, Vector, Enumeration) to be used by this droplet from the request.
void	service(DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Called when a request needs to be processed.
protected void	serviceArray(java.lang.Object pArray, int pStart, int pHowMany, java.lang.String pIndexName, java.lang.String pElementName, DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Renders the range operation for array objects
protected void	serviceCollection(java.util.Collection pCollection, int pStart, int pHowMany, java.lang.String pIndexName, java.lang.String pElementName, DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Renders the range operation for Collection objects
protected void	serviceDictionary(java.util.Dictionary pDictionary, int pStart, int pHowMany, java.lang.String pIndexName, java.lang.String pElementName, DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Renders the range operation for Dictionary objects
protected void	serviceEnumeration(java.util.Enumeration pEnumeration, int pStart, int pHowMany, java.lang.String pIndexName, java.lang.String pElementName, DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Renders the range operation for Enumeration objects
protected void	serviceIterator(java.util.Iterator pIterator, int pStart, int pHowMany, java.lang.String pIndexName, java.lang.String pElementName, DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Renders the range operation for Interator objects
protected void	serviceList(java.util.List pList, int pStart, int pHowMany, java.lang.String pIndexName, java.lang.String pElementName, DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Renders the range operation for List objects
protected void	serviceMap(java.util.Map pMap, int pStart, int pHowMany, java.lang.String pIndexName, java.lang.String pElementName, DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Renders the range operation for Map objects
static void	setPrevNextParameters(int pStart, int pHowMany, int pLength, DynamoHttpServletRequest pRequest) Sets the HAS_PREV/NEXT, PREV/NEXT_START, PREV/NEXT_END, PREV/NEXT_HOW_MANY, SIZE, and END parameters based on the input parameter values and the length of the array.

Methods inherited from class atg.servlet.DynamoServlet

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

Methods inherited from class atg.nucleus.servlet.ServletService

destroy, getServletConfig, getServletInfo, 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, getAdminServletOutputStreamEncoding, getLoggingForVlogging, getLogListenerCount, getLogListeners, getName, getNameContext, getNucleus, getRoot, getServiceConfiguration, getServiceInfo, isAdminServletUseServletOutputStream, isLoggingDebug, isLoggingError, isLoggingInfo, isLoggingTrace, isLoggingWarning, isRunning, logDebug, logDebug, logDebug, logError, logError, logError, logInfo, logInfo, logInfo, logTrace, logTrace, logTrace, logWarning, logWarning, logWarning, nameContextElementBound, nameContextElementUnbound, removeLogListener, reResolveThis, resolveName, resolveName, resolveName, resolveName, sendLogEvent, setAdminServletOutputStreamEncoding, setAdminServletUseServletOutputStream, setLoggingDebug, setLoggingError, setLoggingInfo, setLoggingTrace, setLoggingWarning, setNucleus, setServiceInfo, startService, stopService, toString

Methods inherited from class atg.nucleus.logging.VariableArgumentApplicationLoggingImpl

vlogDebug, vlogDebug, vlogDebug, vlogDebug, vlogDebugTrace, 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, wait, wait, wait

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

Class version string

ARRAY

public static final java.lang.String ARRAY

See Also:

Constant Field Values

START

public static final java.lang.String START

See Also:

Constant Field Values

HOW_MANY

public static final java.lang.String HOW_MANY

See Also:

Constant Field Values

INDEX_NAME

public static final java.lang.String INDEX_NAME

See Also:

Constant Field Values

ELEMENT_NAME

public static final java.lang.String ELEMENT_NAME

See Also:

Constant Field Values

OUTPUT_START

public static final java.lang.String OUTPUT_START

See Also:

Constant Field Values

OUTPUT_END

public static final java.lang.String OUTPUT_END

See Also:

Constant Field Values

OUTPUT

public static final java.lang.String OUTPUT

See Also:

Constant Field Values

EMPTY

public static final java.lang.String EMPTY

See Also:

Constant Field Values

INDEX

public static final java.lang.String INDEX

See Also:

Constant Field Values

COUNT

public static final java.lang.String COUNT

See Also:

Constant Field Values

ELEMENT

public static final java.lang.String ELEMENT

See Also:

Constant Field Values

KEY

public static final java.lang.String KEY

See Also:

Constant Field Values

END

public static final java.lang.String END

See Also:

Constant Field Values

SIZE

public static final java.lang.String SIZE

See Also:

Constant Field Values

HAS_PREV

public static final java.lang.String HAS_PREV

See Also:

Constant Field Values

HAS_NEXT

public static final java.lang.String HAS_NEXT

See Also:

Constant Field Values

PREV_START

public static final java.lang.String PREV_START

See Also:

Constant Field Values

PREV_END

public static final java.lang.String PREV_END

See Also:

Constant Field Values

PREV_HOW_MANY

public static final java.lang.String PREV_HOW_MANY

See Also:

Constant Field Values

NEXT_START

public static final java.lang.String NEXT_START

See Also:

Constant Field Values

NEXT_END

public static final java.lang.String NEXT_END

See Also:

Constant Field Values

NEXT_HOW_MANY

public static final java.lang.String NEXT_HOW_MANY

See Also:

Constant Field Values

Constructor Detail

Range

public Range()

Method Detail

getArray

public java.lang.Object getArray(DynamoHttpServletRequest pRequest)

Gets the array-like value (e.g., array, Vector, Enumeration) to be used by this droplet from the request. Subclasses may override this method to extract the array by some means other than simply looking up its parameter value in the request.

setPrevNextParameters

public static void setPrevNextParameters(int pStart,
                                         int pHowMany,
                                         int pLength,
                                         DynamoHttpServletRequest pRequest)

Sets the HAS_PREV/NEXT, PREV/NEXT_START, PREV/NEXT_END, PREV/NEXT_HOW_MANY, SIZE, and END parameters based on the input parameter values and the length of the array.

service

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

Called when a request needs to be processed.

Overrides:

service in class DynamoServlet

Parameters:

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

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

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

serviceArray

protected void serviceArray(java.lang.Object pArray,
                            int pStart,
                            int pHowMany,
                            java.lang.String pIndexName,
                            java.lang.String pElementName,
                            DynamoHttpServletRequest pRequest,
                            DynamoHttpServletResponse pResponse)
                     throws javax.servlet.ServletException,
                            java.io.IOException

Renders the range operation for array objects

Parameters:

pArray - the object to iterate

pStart - Specifies the starting index (1-based). For example, to start at the beginning of the array, set start to 1. If start points past the end of the array, the empty parameter will be rendered.

pHowMany - Specifies the number of items in the array set to display. If the combination of start and howMany point past the end of the array, rendering stops after the end of the array is reached.

pIndexName - the parameter name to use for the index

pElementName - the parameter name to use for the element

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

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

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

serviceList

protected void serviceList(java.util.List pList,
                           int pStart,
                           int pHowMany,
                           java.lang.String pIndexName,
                           java.lang.String pElementName,
                           DynamoHttpServletRequest pRequest,
                           DynamoHttpServletResponse pResponse)
                    throws javax.servlet.ServletException,
                           java.io.IOException

Renders the range operation for List objects

Parameters:

pList - the object to iterate

pStart - Specifies the starting index (1-based). For example, to start at the beginning of the array, set start to 1. If start points past the end of the array, the empty parameter will be rendered.

pHowMany - Specifies the number of items in the array set to display. If the combination of start and howMany point past the end of the array, rendering stops after the end of the array is reached.

pIndexName - the parameter name to use for the index

pElementName - the parameter name to use for the element

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

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

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

serviceCollection

protected void serviceCollection(java.util.Collection pCollection,
                                 int pStart,
                                 int pHowMany,
                                 java.lang.String pIndexName,
                                 java.lang.String pElementName,
                                 DynamoHttpServletRequest pRequest,
                                 DynamoHttpServletResponse pResponse)
                          throws javax.servlet.ServletException,
                                 java.io.IOException

Renders the range operation for Collection objects

Parameters:

pCollection - the object to iterate

pStart - Specifies the starting index (1-based). For example, to start at the beginning of the array, set start to 1. If start points past the end of the array, the empty parameter will be rendered.

pHowMany - Specifies the number of items in the array set to display. If the combination of start and howMany point past the end of the array, rendering stops after the end of the array is reached.

pIndexName - the parameter name to use for the index

pElementName - the parameter name to use for the element

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

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

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

serviceIterator

protected void serviceIterator(java.util.Iterator pIterator,
                               int pStart,
                               int pHowMany,
                               java.lang.String pIndexName,
                               java.lang.String pElementName,
                               DynamoHttpServletRequest pRequest,
                               DynamoHttpServletResponse pResponse)
                        throws javax.servlet.ServletException,
                               java.io.IOException

Renders the range operation for Interator objects

Parameters:

pIterator - the object to iterate

pStart - Specifies the starting index (1-based). For example, to start at the beginning of the array, set start to 1. If start points past the end of the array, the empty parameter will be rendered.

pHowMany - Specifies the number of items in the array set to display. If the combination of start and howMany point past the end of the array, rendering stops after the end of the array is reached.

pIndexName - the parameter name to use for the index

pElementName - the parameter name to use for the element

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

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

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

serviceEnumeration

protected void serviceEnumeration(java.util.Enumeration pEnumeration,
                                  int pStart,
                                  int pHowMany,
                                  java.lang.String pIndexName,
                                  java.lang.String pElementName,
                                  DynamoHttpServletRequest pRequest,
                                  DynamoHttpServletResponse pResponse)
                           throws javax.servlet.ServletException,
                                  java.io.IOException

Renders the range operation for Enumeration objects

Parameters:

pEnumeration - the object to iterate

pStart - Specifies the starting index (1-based). For example, to start at the beginning of the array, set start to 1. If start points past the end of the array, the empty parameter will be rendered.

pHowMany - Specifies the number of items in the array set to display. If the combination of start and howMany point past the end of the array, rendering stops after the end of the array is reached.

pIndexName - the parameter name to use for the index

pElementName - the parameter name to use for the element

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

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

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

serviceMap

protected void serviceMap(java.util.Map pMap,
                          int pStart,
                          int pHowMany,
                          java.lang.String pIndexName,
                          java.lang.String pElementName,
                          DynamoHttpServletRequest pRequest,
                          DynamoHttpServletResponse pResponse)
                   throws javax.servlet.ServletException,
                          java.io.IOException

Renders the range operation for Map objects

Parameters:

pMap - the object to iterate

pStart - Specifies the starting index (1-based). For example, to start at the beginning of the array, set start to 1. If start points past the end of the array, the empty parameter will be rendered.

pHowMany - Specifies the number of items in the array set to display. If the combination of start and howMany point past the end of the array, rendering stops after the end of the array is reached.

pIndexName - the parameter name to use for the index

pElementName - the parameter name to use for the element

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

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

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

serviceDictionary

protected void serviceDictionary(java.util.Dictionary pDictionary,
                                 int pStart,
                                 int pHowMany,
                                 java.lang.String pIndexName,
                                 java.lang.String pElementName,
                                 DynamoHttpServletRequest pRequest,
                                 DynamoHttpServletResponse pResponse)
                          throws javax.servlet.ServletException,
                                 java.io.IOException

Renders the range operation for Dictionary objects

Parameters:

pDictionary - the object to iterate

pStart - Specifies the starting index (1-based). For example, to start at the beginning of the array, set start to 1. If start points past the end of the array, the empty parameter will be rendered.

pHowMany - Specifies the number of items in the array set to display. If the combination of start and howMany point past the end of the array, rendering stops after the end of the array is reached.

pIndexName - the parameter name to use for the index

pElementName - the parameter name to use for the element

pRequest - the request to be processed

pResponse - the response object for this request

Throws:

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

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