com.espertech.esper.epl.expression.time

Class ExprTimePeriodImpl

java.lang.Object

com.espertech.esper.epl.expression.core.ExprNodeBase

com.espertech.esper.epl.expression.time.ExprTimePeriodImpl

All Implemented Interfaces:

ExprNode, ExprNodeRenderable, ExprValidator, ExprTimePeriod, MetaDefItem, Serializable

public class ExprTimePeriodImpl
extends ExprNodeBase
implements ExprTimePeriod

Expression representing a time period.

Child nodes to this expression carry the actual parts and must return a numeric value.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExprTimePeriodImpl(TimeZone timeZone, boolean hasYear, boolean hasMonth, boolean hasWeek, boolean hasDay, boolean hasHour, boolean hasMinute, boolean hasSecond, boolean hasMillisecond, boolean hasMicrosecond, TimeAbacus timeAbacus)

Method Summary

Modifier and Type	Method and Description
ExprTimePeriodEvalDeltaConst	constEvaluator(ExprEvaluatorContext context)
boolean	equalsNode(ExprNode node, boolean ignoreStreamPrefix) Return true if a expression node semantically equals the current node, or false if not.
double	evaluateAsSeconds(EventBean[] eventsPerStream, boolean newData, ExprEvaluatorContext context)
CodegenExpression	evaluateAsSecondsCodegen(CodegenParamSetExprPremade params, CodegenContext context)
TimePeriod	evaluateGetTimePeriod(EventBean[] eventsPerStream, boolean newData, ExprEvaluatorContext context)
CodegenExpression	evaluateGetTimePeriodCodegen(CodegenParamSetExprPremade params, CodegenContext context)
ExprEvaluator	getExprEvaluator()
ExprForge	getForge()
ExprPrecedenceEnum	getPrecedence() Returns precedence.
TimeAbacus	getTimeAbacus()
TimeZone	getTimeZone()
boolean	hasVariable() Indicator whether the time period has a variable in any of the child expressions.
boolean	isConstantResult() Returns true if the expression node's evaluation value doesn't depend on any events data, as must be determined at validation time, which is bottom-up and therefore reliably allows each node to determine constant value.
boolean	isHasDay() Indicator whether the time period has a day part child expression.
boolean	isHasHour() Indicator whether the time period has a hour part child expression.
boolean	isHasMicrosecond() Indicator whether the time period has a microsecond part child expression.
boolean	isHasMillisecond() Indicator whether the time period has a millisecond part child expression.
boolean	isHasMinute() Indicator whether the time period has a minute part child expression.
boolean	isHasMonth() Indicator whether the time period has a month part child expression.
boolean	isHasSecond() Indicator whether the time period has a second part child expression.
boolean	isHasWeek() Indicator whether the time period has a week part child expression.
boolean	isHasYear() Indicator whether the time period has a year part child expression.
ExprTimePeriodEvalDeltaNonConst	nonconstEvaluator()
void	toPrecedenceFreeEPL(StringWriter writer)
ExprNode	validate(ExprValidationContext validationContext)

Methods inherited from class com.espertech.esper.epl.expression.core.ExprNodeBase

accept, accept, acceptChildnodes, addChildNode, addChildNodes, addChildNodeToFront, getChildNodes, replaceUnlistedChildNode, setChildNode, setChildNodes, toEPL

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.epl.expression.core.ExprNode

accept, accept, acceptChildnodes, addChildNode, addChildNodes, getChildNodes, replaceUnlistedChildNode, setChildNode, setChildNodes

Methods inherited from interface com.espertech.esper.epl.expression.core.ExprNodeRenderable

toEPL

Constructor Detail

ExprTimePeriodImpl

public ExprTimePeriodImpl(TimeZone timeZone,
                          boolean hasYear,
                          boolean hasMonth,
                          boolean hasWeek,
                          boolean hasDay,
                          boolean hasHour,
                          boolean hasMinute,
                          boolean hasSecond,
                          boolean hasMillisecond,
                          boolean hasMicrosecond,
                          TimeAbacus timeAbacus)

Method Detail

getForge

public ExprForge getForge()

Specified by:

getForge in interface ExprNode

getExprEvaluator

public ExprEvaluator getExprEvaluator()

constEvaluator

public ExprTimePeriodEvalDeltaConst constEvaluator(ExprEvaluatorContext context)

Specified by:

constEvaluator in interface ExprTimePeriod

nonconstEvaluator

public ExprTimePeriodEvalDeltaNonConst nonconstEvaluator()

Specified by:

nonconstEvaluator in interface ExprTimePeriod

evaluateGetTimePeriodCodegen

public CodegenExpression evaluateGetTimePeriodCodegen(CodegenParamSetExprPremade params,
                                                      CodegenContext context)

Specified by:

evaluateGetTimePeriodCodegen in interface ExprTimePeriod

evaluateAsSecondsCodegen

public CodegenExpression evaluateAsSecondsCodegen(CodegenParamSetExprPremade params,
                                                  CodegenContext context)

Specified by:

evaluateAsSecondsCodegen in interface ExprTimePeriod

hasVariable

public boolean hasVariable()

Indicator whether the time period has a variable in any of the child expressions.

Specified by:

hasVariable in interface ExprTimePeriod

Returns:

true for variable present, false for not present

evaluateGetTimePeriod

public TimePeriod evaluateGetTimePeriod(EventBean[] eventsPerStream,
                                        boolean newData,
                                        ExprEvaluatorContext context)

Specified by:

evaluateGetTimePeriod in interface ExprTimePeriod

evaluateAsSeconds

public double evaluateAsSeconds(EventBean[] eventsPerStream,
                                boolean newData,
                                ExprEvaluatorContext context)

Specified by:

evaluateAsSeconds in interface ExprTimePeriod

getTimeAbacus

public TimeAbacus getTimeAbacus()

getTimeZone

public TimeZone getTimeZone()

isHasDay

public boolean isHasDay()

Indicator whether the time period has a day part child expression.

Specified by:

isHasDay in interface ExprTimePeriod

Returns:

true for part present, false for not present

isHasHour

public boolean isHasHour()

Indicator whether the time period has a hour part child expression.

Specified by:

isHasHour in interface ExprTimePeriod

Returns:

true for part present, false for not present

isHasMinute

public boolean isHasMinute()

Indicator whether the time period has a minute part child expression.

Specified by:

isHasMinute in interface ExprTimePeriod

Returns:

true for part present, false for not present

isHasSecond

public boolean isHasSecond()

Indicator whether the time period has a second part child expression.

Specified by:

isHasSecond in interface ExprTimePeriod

Returns:

true for part present, false for not present

isHasMillisecond

public boolean isHasMillisecond()

Indicator whether the time period has a millisecond part child expression.

Specified by:

isHasMillisecond in interface ExprTimePeriod

Returns:

true for part present, false for not present

isHasMicrosecond

public boolean isHasMicrosecond()

Description copied from interface: ExprTimePeriod

Indicator whether the time period has a microsecond part child expression.

Specified by:

isHasMicrosecond in interface ExprTimePeriod

Returns:

true for part present, false for not present

isHasYear

public boolean isHasYear()

Indicator whether the time period has a year part child expression.

Specified by:

isHasYear in interface ExprTimePeriod

Returns:

true for part present, false for not present

isHasMonth

public boolean isHasMonth()

Indicator whether the time period has a month part child expression.

Specified by:

isHasMonth in interface ExprTimePeriod

Returns:

true for part present, false for not present

isHasWeek

public boolean isHasWeek()

Indicator whether the time period has a week part child expression.

Specified by:

isHasWeek in interface ExprTimePeriod

Returns:

true for part present, false for not present

validate

public ExprNode validate(ExprValidationContext validationContext)
                  throws ExprValidationException

Specified by:

validate in interface ExprValidator

Throws:

ExprValidationException

isConstantResult

public boolean isConstantResult()

Description copied from interface: ExprNode

Returns true if the expression node's evaluation value doesn't depend on any events data, as must be determined at validation time, which is bottom-up and therefore reliably allows each node to determine constant value.

Specified by:

isConstantResult in interface ExprNode

Specified by:

isConstantResult in interface ExprTimePeriod

Returns:

true for constant evaluation value, false for non-constant evaluation value

toPrecedenceFreeEPL

public void toPrecedenceFreeEPL(StringWriter writer)

Specified by:

toPrecedenceFreeEPL in class ExprNodeBase

getPrecedence

public ExprPrecedenceEnum getPrecedence()

Description copied from interface: ExprNode

Returns precedence.

Specified by:

getPrecedence in interface ExprNode

Returns:

precedence

equalsNode

public boolean equalsNode(ExprNode node,
                          boolean ignoreStreamPrefix)

Description copied from interface: ExprNode

Return true if a expression node semantically equals the current node, or false if not.

Concrete implementations should compare the type and any additional information that impact the evaluation of a node.

Specified by:

equalsNode in interface ExprNode

Parameters:

node - to compare to

ignoreStreamPrefix - when the equals-comparison can ignore prefix of event properties

Returns:

true if semantically equal, or false if not equals