*** This class is subject to change. ***

com.sas.iquery.metadata.expr.relational
Class RelativeTimestampValueExpression

com.sas.iquery.metadata.expr.relational.RelativeTimestampValueExpression

All Implemented Interfaces:

Base, BusinessModelResourceReferencer, ModelItem, UsabilityInterface, ExpressionInterface, PropertyChangeListenee, java.beans.PropertyChangeListener, java.lang.Cloneable, java.util.EventListener

public class RelativeTimestampValueExpression

Models relative timestamp-oriented values used within filter sub-expressions. This class is used to generate an expression for a relative timestamp. This timestamp may be represented in SAS as datetime() to represent now, or an interval time such as intnx("dtweek",datetime(),-1,"sameday") to represent the same day last week. This time is creating by setting the following variables:

• Alignment - TimeShiftAlignment
• Direction - TimeShiftDirection
• Multiplier - integer
• Unit - TimeShiftUnit
• ShiftFrom - Expression

Field Summary

static FunctionCall

DATETIME DATETIME represents the current date and time.

Fields inherited from class com.sas.iquery.metadata.expr.relational.AbstractRelativeTimeValueExpression

EVENT_ALIGNMENT_CHANGED, EVENT_MULTIPLIER_CHANGED, EVENT_SHIFT_DIRECTION_CHANGED, EVENT_SHIFT_FROM_CHANGED, EVENT_UNIT_CHANGED

Fields inherited from interface com.sas.iquery.metadata.business.ModelItem

EVENT_OBJECT_PROPERTY_CHANGED

Fields inherited from interface com.sas.iquery.metadata.business.Base

EVENT_OBJECT_DEFINITION_CHANGED

Constructor Summary

RelativeTimestampValueExpression()
Constructor for RelativeTimestampValueExpression

RelativeTimestampValueExpression(ExpressionInterface shiftFrom, TimeShiftUnit unitValue, TimeShiftDirection directionValue, int multiplierValue, TimeShiftAlignment alignmentValue)
Create a RelativeTimestampValueExpression setting all values using input.

Method Summary

int	getExpressionType() Return the integer form of the expression type.
void	setShiftingFrom(ExpressionInterface exp) Set the date/time to shift from.

Methods inherited from class com.sas.iquery.metadata.expr.relational.AbstractRelativeTimeValueExpression

getAlignment, getRelativeSASDateExpression, getShiftDirection, getShiftingFrom, getShiftMultiplier, getShiftUnit, isConstant, setAlignment, setShiftDirection, setShiftMultiplier, setShiftUnit

Methods inherited from interface com.sas.iquery.metadata.business.BusinessModelResourceReferencer

getResources

Methods inherited from interface com.sas.iquery.metadata.PropertyChangeListenee

addListener, getListeners, removeListener

Methods inherited from interface com.sas.iquery.metadata.business.UsabilityInterface

getReasonsUnusable, isUsableInQuery

Field Detail

*** This field is subject to change. ***

DATETIME

public static final FunctionCall DATETIME

DATETIME represents the current date and time.

Constructor Detail

*** This constructor is subject to change. ***

RelativeTimestampValueExpression

public RelativeTimestampValueExpression()

Constructor for RelativeTimestampValueExpression

*** This constructor is subject to change. ***

RelativeTimestampValueExpression

public RelativeTimestampValueExpression(ExpressionInterface shiftFrom,
                                        TimeShiftUnit unitValue,
                                        TimeShiftDirection directionValue,
                                        int multiplierValue,
                                        TimeShiftAlignment alignmentValue)

Create a RelativeTimestampValueExpression setting all values using input.

Parameters:

shiftFrom - Must be an expression of type ExpressionTypes.EXP_TYPE_DATE

unitValue -

directionValue -

multiplierValue -

alignmentValue -

Method Detail

*** This method is subject to change. ***

setShiftingFrom

public void setShiftingFrom(ExpressionInterface exp)
                     throws java.lang.IllegalArgumentException,
                            MetadataException

Description copied from class: AbstractRelativeTimeValueExpression

Set the date/time to shift from. This checks to ensure that it does not set the object itself as the shifting from. In that case the current shift remains in place. This throws an exception if the current object is a constant expression, this can be check with isConstant() method.

Overrides:

setShiftingFrom in class AbstractRelativeTimeValueExpression

Parameters:

exp - ExpressionInterface

Throws:

java.lang.IllegalArgumentException

MetadataException

See Also:

AbstractRelativeTimeValueExpression.setShiftingFrom(com.sas.iquery.metadata.expr.ExpressionInterface)

*** This method is subject to change. ***

getExpressionType

public int getExpressionType()

Description copied from interface: ExpressionInterface

Return the integer form of the expression type.

Specified by:

getExpressionType in interface ExpressionInterface

Specified by:

getExpressionType in class AbstractRelativeTimeValueExpression

Returns:

int

See Also:

AbstractRelativeTimeValueExpression.getExpressionType()

*** This class is subject to change. ***