Package com.yahoo.search.grouping.request

Class BucketResolver

java.lang.Object

com.yahoo.search.grouping.request.BucketResolver

public class BucketResolver
extends Object

This is a helper class for resolving buckets to a list of GroupingExpression objects. To resolve a list simply push(ConstantValue, boolean) onto it, before calling resolve(GroupingExpression) to retrieve the list of corresponding grouping expression object.

Author:

Simon Thoresen Hult

Constructor Summary

Constructors

Constructor	Description
BucketResolver()

Method Summary

Modifier and Type	Method	Description
BucketResolver	push(ConstantValue<?> val, boolean inclusive)	Pushes the given expression onto this bucket resolver.
PredefinedFunction	resolve(GroupingExpression exp)	Resolves and returns the list of grouping expressions that correspond to the previously pushed buckets.

Methods inherited from class java.lang.Object

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

Constructor Details

BucketResolver

public BucketResolver()

Method Details

push

public BucketResolver push(ConstantValue<?> val,
 boolean inclusive)

Pushes the given expression onto this bucket resolver. Once all buckets have been pushed using this method, call resolve(GroupingExpression) to retrieve to combined grouping expression.

Parameters:

val - the expression to push

inclusive - whether or not the value is inclusive or not

Throws:

IllegalArgumentException - thrown if the expression is incompatible

resolve

public PredefinedFunction resolve(GroupingExpression exp)

Resolves and returns the list of grouping expressions that correspond to the previously pushed buckets.

Parameters:

exp - The expression to assign to the function.

Returns:

The list corresponding to the pushed buckets.