Package com.yahoo.search.predicate.index

Class PredicateRangeTermExpander

java.lang.Object

com.yahoo.search.predicate.index.PredicateRangeTermExpander

public class PredicateRangeTermExpander
extends java.lang.Object

Expands range terms from a query to find the set of features they translate to.

Author:

bjorncs, Magnar Nedland

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	PredicateRangeTermExpander.EdgeHandler	Callback for edges generated by the expansion.
static interface	PredicateRangeTermExpander.RangeHandler	Callback for ranges generated by the expansion.

Constructor Summary

Constructors

Constructor	Description
PredicateRangeTermExpander(int arity)	Creates a PredicateRangeTermExpander with default value range.
PredicateRangeTermExpander(int arity, long lowerBound, long upperBound)

Method Summary

Modifier and Type	Method	Description
void	expand(java.lang.String key, long value, PredicateRangeTermExpander.RangeHandler rangeHandler, PredicateRangeTermExpander.EdgeHandler edgeHandler)	Expands a range term to a set of features (ranges and edges) to be used in a query.

Methods inherited from class java.lang.Object

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

Constructor Detail

PredicateRangeTermExpander

public PredicateRangeTermExpander(int arity)

Creates a PredicateRangeTermExpander with default value range.

Parameters:

arity - The arity used to index the predicates

PredicateRangeTermExpander

public PredicateRangeTermExpander(int arity,
                                  long lowerBound,
                                  long upperBound)

Parameters:

arity - The arity used to index the predicates

lowerBound - The minimum value used by any range predicate in the system

upperBound - The maximum value used by any range predicate in the system

Method Detail

expand

public void expand(java.lang.String key,
                   long value,
                   PredicateRangeTermExpander.RangeHandler rangeHandler,
                   PredicateRangeTermExpander.EdgeHandler edgeHandler)

Expands a range term to a set of features (ranges and edges) to be used in a query.

Parameters:

key - The term key

value - The term value

rangeHandler - Handler for range features (long)

edgeHandler - Handler for edge features (long, int)