Package org.apache.lucene.expressions

Expressions.

Expression - result of compiling an expression, which can evaluate it for a given document. Each expression can have external variables are resolved by Bindings.

Bindings - abstraction for binding external variables to a way to get a value for those variables for a particular document (DoubleValuesSource).

SimpleBindings - default implementation of bindings which provide easy ways to bind sort fields and other expressions to external variables

Class Summary

Class	Description
Bindings	Binds variable names in expressions to actual data.
CachingExpressionValueSource	This expression value source shares one value cache when generating ExpressionFunctionValues such that only one value along the whole generation tree is corresponding to one name
Expression	Base class that computes the value of an expression for a document.
ExpressionFunctionValues	A DoubleValues which evaluates an expression
ExpressionRescorer	A Rescorer that uses an expression to re-score first pass hits.
ExpressionValueSource	A DoubleValuesSource which evaluates a Expression given the context of an Bindings.
SimpleBindings	Simple class that binds expression variable names to DoubleValuesSources or other Expressions.