Module org.apache.lucene.expressions

Package org.apache.lucene.expressions

Class ExpressionFunctionValues

java.lang.Object

org.apache.lucene.search.DoubleValues

org.apache.lucene.expressions.ExpressionFunctionValues

class ExpressionFunctionValues
extends DoubleValues

A DoubleValues which evaluates an expression

Field Summary

Fields

Modifier and Type	Field	Description
(package private) boolean	computed
(package private) int	currentDoc
(package private) double	currentValue
(package private) final Expression	expression
(package private) final DoubleValues[]	functionValues

Fields inherited from class org.apache.lucene.search.DoubleValues

EMPTY

Constructor Summary

Constructors

Constructor	Description
ExpressionFunctionValues(Expression expression, DoubleValues[] functionValues)

Method Summary

Modifier and Type	Method	Description
boolean	advanceExact(int doc)	Advance this instance to the given document id
double	doubleValue()	Get the double value for the current document

Methods inherited from class org.apache.lucene.search.DoubleValues

withDefault

Methods inherited from class java.lang.Object

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

Field Details

expression

final Expression expression

functionValues

final DoubleValues[] functionValues

currentValue

double currentValue

currentDoc

int currentDoc

computed

boolean computed

Constructor Details

ExpressionFunctionValues

ExpressionFunctionValues(Expression expression,
 DoubleValues[] functionValues)

Method Details

advanceExact

public boolean advanceExact(int doc)
                     throws IOException

Description copied from class: DoubleValues

Advance this instance to the given document id

Specified by:

advanceExact in class DoubleValues

Returns:

true if there is a value for this document

Throws:

IOException

doubleValue

public double doubleValue()

Description copied from class: DoubleValues

Get the double value for the current document

Specified by:

doubleValue in class DoubleValues