Package com.yahoo.search.grouping.request

Class DocumentValue

java.lang.Object

com.yahoo.search.grouping.request.GroupingNode

com.yahoo.search.grouping.request.GroupingExpression

com.yahoo.search.grouping.request.DocumentValue

Direct Known Subclasses:

ArrayAtLookup, AttributeFunction, AttributeValue, DocIdNsSpecificValue, InterpolatedLookup, RelevanceValue, SummaryValue

public abstract class DocumentValue
extends GroupingExpression

This class represents a document value in a GroupingExpression. As such, the subclasses of this can only be used as document-level expressions (i.e. level 0, see GroupingExpression.resolveLevel(int)).

Author:

Simon Thoresen Hult

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DocumentValue(String image, String label, Integer level)

Method Summary

Modifier and Type	Method	Description
void	resolveLevel(int level)	Resolves the conceptual level of this expression.

Methods inherited from class com.yahoo.search.grouping.request.GroupingExpression

asImage, asString, copy, getLevel, getLevelOrNull, setLabel, visit

Methods inherited from class com.yahoo.search.grouping.request.GroupingNode

getImage, getLabel, toString

Methods inherited from class java.lang.Object

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

Constructor Details

DocumentValue

protected DocumentValue(String image,
 String label,
 Integer level)

Method Details

resolveLevel

public void resolveLevel(int level)

Description copied from class: GroupingExpression

Resolves the conceptual level of this expression. This level represents the type of data that is consumed by this expression, where level 0 is a single hit, level 1 is a group, level 2 is a list of groups, and so forth. This method verifies the input level against the expression type, and recursively resolves the level of all argument expressions.

Overrides:

resolveLevel in class GroupingExpression

Parameters:

level - The level of the input data.