Package com.yahoo.vespa.indexinglanguage.expressions

Class InputExpression

java.lang.Object

com.yahoo.vespa.objects.Selectable

com.yahoo.vespa.indexinglanguage.expressions.Expression

com.yahoo.vespa.indexinglanguage.expressions.InputExpression

public final class InputExpression
extends Expression

Author:

Simon Thoresen Hult

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	InputExpression.FieldPathOptimizer
static class	InputExpression.InputFieldNameExtractor
static class	InputExpression.RequiredInputFieldsExtractor

Constructor Summary

Constructors

Constructor	Description
InputExpression(String fieldName)

Method Summary

Modifier and Type	Method	Description
protected void	doExecute(ExecutionContext context)
boolean	equals(Object obj)
String	getFieldName()
com.yahoo.document.DataType	getOutputType(TypeContext context)	Returns the output type this is must produce (since it is part of a statement expression), or null if this is not set or there is no output produced at the end of the statement.
int	hashCode()
boolean	requiresInput()	Returns whether this expression requires an input value.
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.
String	toString()

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

convertChildren, doResolve, execute, execute, execute, execute, execute, execute, execute, execute, execute, execute, execute, execute, fromString, fromString, getInputType, getOutputType, isMutating, leastGeneralNonNullOf, leastGeneralOf, mostGeneralOf, newInstance, requireOutputType, resolve, resolve, resolve, resolve, resolve, resolve, resolve, resolve, resolve, setInputType, setOutputType, setStatementOutput

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

select, select, selectMembers

Methods inherited from class java.lang.Object

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

Constructor Details

InputExpression

public InputExpression(String fieldName)

Method Details

requiresInput

public boolean requiresInput()

Description copied from class: Expression

Returns whether this expression requires an input value.

Overrides:

requiresInput in class Expression

getFieldName

public String getFieldName()

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

doExecute

protected void doExecute(ExecutionContext context)

Specified by:

doExecute in class Expression

getOutputType

public com.yahoo.document.DataType getOutputType(TypeContext context)

Description copied from class: Expression

Returns the output type this is must produce (since it is part of a statement expression), or null if this is not set or there is no output produced at the end of the statement.

Overrides:

getOutputType in class Expression

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