Package com.yahoo.vespa.indexinglanguage.expressions

Class IfThenExpression

java.lang.Object

com.yahoo.vespa.objects.Selectable

com.yahoo.vespa.indexinglanguage.expressions.Expression

com.yahoo.vespa.indexinglanguage.expressions.CompositeExpression

com.yahoo.vespa.indexinglanguage.expressions.IfThenExpression

public final class IfThenExpression
extends CompositeExpression

Author:

Simon Thoresen Hult

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	IfThenExpression.Comparator

Constructor Summary

Constructors

Constructor	Description
IfThenExpression(Expression lhs, IfThenExpression.Comparator cmp, Expression right, Expression ifTrue)
IfThenExpression(Expression lhs, IfThenExpression.Comparator cmp, Expression right, Expression ifTrue, Expression ifFalse)

Method Summary

Modifier and Type	Method	Description
IfThenExpression	convertChildren(ExpressionConverter converter)	Returns an expression where the children of this has been converted using the given converter.
protected void	doExecute(ExecutionContext context)
protected void	doResolve(TypeContext context)
boolean	equals(Object obj)
IfThenExpression.Comparator	getComparator()
Expression	getIfFalseExpression()
Expression	getIfTrueExpression()
Expression	getLeftHandSide()
Expression	getRightHandSide()
int	hashCode()
boolean	isMutating()	Returns whether this expression outputs a different value than what it gets as input.
boolean	requiresInput()	Returns whether this expression requires an input value.
void	selectMembers(com.yahoo.vespa.objects.ObjectPredicate predicate, com.yahoo.vespa.objects.ObjectOperation operation)
com.yahoo.document.DataType	setInputType(com.yahoo.document.DataType inputType, TypeContext context)	Sets the input type of this and returns the resulting output type, or null if it cannot be uniquely determined.
com.yahoo.document.DataType	setOutputType(com.yahoo.document.DataType outputType, TypeContext context)	Sets the output type of this and returns the resulting input type, or null if it cannot be uniquely determined.
void	setStatementOutput(com.yahoo.document.DocumentType documentType, com.yahoo.document.Field field)	Sets the document type and field the statement this expression is part of will write to
String	toString()

Methods inherited from class com.yahoo.vespa.indexinglanguage.expressions.CompositeExpression

toScriptBlock

Methods inherited from class com.yahoo.vespa.indexinglanguage.expressions.Expression

execute, execute, execute, execute, execute, execute, execute, execute, execute, execute, execute, execute, fromString, fromString, getInputType, getOutputType, getOutputType, leastGeneralNonNullOf, leastGeneralOf, mostGeneralOf, newInstance, requireOutputType, resolve, resolve, resolve, resolve, resolve, resolve, resolve, resolve, resolve, setInputType, setOutputType

Methods inherited from class com.yahoo.vespa.objects.Selectable

select, select

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

IfThenExpression

public IfThenExpression(Expression lhs,
 IfThenExpression.Comparator cmp,
 Expression right,
 Expression ifTrue)

IfThenExpression

public IfThenExpression(Expression lhs,
 IfThenExpression.Comparator cmp,
 Expression right,
 Expression ifTrue,
 Expression ifFalse)

Method Details

isMutating

public boolean isMutating()

Description copied from class: Expression

Returns whether this expression outputs a different value than what it gets as input. Annotating a string value does not count as modifying it.

Overrides:

isMutating in class Expression

requiresInput

public boolean requiresInput()

Description copied from class: Expression

Returns whether this expression requires an input value.

Overrides:

requiresInput in class Expression

convertChildren

public IfThenExpression convertChildren(ExpressionConverter converter)

Description copied from class: Expression

Returns an expression where the children of this has been converted using the given converter. This default implementation returns this as it has no children.

Specified by:

convertChildren in class CompositeExpression

setInputType

public com.yahoo.document.DataType setInputType(com.yahoo.document.DataType inputType,
 TypeContext context)

Description copied from class: Expression

Sets the input type of this and returns the resulting output type, or null if it cannot be uniquely determined. Subtypes may implement this by calling setInputType(inputType, requiredType, VerificationContext context).

Overrides:

setInputType in class Expression

setOutputType

public com.yahoo.document.DataType setOutputType(com.yahoo.document.DataType outputType,
 TypeContext context)

Description copied from class: Expression

Sets the output type of this and returns the resulting input type, or null if it cannot be uniquely determined. Subtypes implement this by calling setOutputType(outputType, requiredType, VerificationContext context).

Overrides:

setOutputType in class Expression

setStatementOutput

public void setStatementOutput(com.yahoo.document.DocumentType documentType,
 com.yahoo.document.Field field)

Description copied from class: Expression

Sets the document type and field the statement this expression is part of will write to

Overrides:

setStatementOutput in class Expression

getLeftHandSide

public Expression getLeftHandSide()

getComparator

public IfThenExpression.Comparator getComparator()

getRightHandSide

public Expression getRightHandSide()

getIfTrueExpression

public Expression getIfTrueExpression()

getIfFalseExpression

public Expression getIfFalseExpression()

doResolve

protected void doResolve(TypeContext context)

Overrides:

doResolve in class Expression

doExecute

protected void doExecute(ExecutionContext context)

Specified by:

doExecute in class Expression

selectMembers

public void selectMembers(com.yahoo.vespa.objects.ObjectPredicate predicate,
 com.yahoo.vespa.objects.ObjectOperation operation)

Overrides:

selectMembers in class com.yahoo.vespa.objects.Selectable

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object