com.bigdata.rdf.sparql.ast

Interface IGroupNode<E extends IGroupMemberNode>

All Superinterfaces:

BOp, Cloneable, IGroupMemberNode, IPropertySet, IQueryNode, Iterable<E>, IVariableBindingRequirements, Serializable

All Known Implementing Classes:

AbstractStatementContainer, ConstructNode, GraphPatternGroup, GroupNodeBase, JoinGroupNode, PropertyPathUnionNode, QuadData, UnionNode, UpdateRoot

public interface IGroupNode<E extends IGroupMemberNode>
extends IGroupMemberNode, Iterable<E>

A type of query node that groups a set of query nodes together. This is the interface used by the UnionNode and JoinGroupNode query nodes.

Nested Class Summary

Nested classes/interfaces inherited from interface com.bigdata.rdf.sparql.ast.IQueryNode

IQueryNode.Annotations

Field Summary

Fields inherited from interface com.bigdata.bop.BOp

NOANNS, NOARGS

Method Summary

Methods

Modifier and Type	Method and Description
IGroupNode<E>	addChild(E child) Add a child to this group.
boolean	isEmpty() Return true iff the group is empty.
IGroupNode<E>	removeChild(E child) Remove a child from this group.
int	size() Return the #of children which are direct members of the group.

Methods inherited from interface com.bigdata.rdf.sparql.ast.IGroupMemberNode

getContext, getParent, getParentGraphPatternGroup, getParentJoinGroup, setParent

Methods inherited from interface com.bigdata.rdf.sparql.ast.IQueryNode

toString

Methods inherited from interface com.bigdata.bop.BOp

annotations, argIterator, args, arity, clone, get, getEvaluationContext, getId, getProperty, getRequiredProperty, isController, setProperty, toArray, toArray, toShortString, toString

Methods inherited from interface cutthecrap.utils.striterators.IPropertySet

getProperty

Methods inherited from interface com.bigdata.rdf.sparql.ast.IVariableBindingRequirements

getDesiredBound, getRequiredBound

Methods inherited from interface java.lang.Iterable

iterator

Method Detail

addChild

IGroupNode<E> addChild(E child)

Add a child to this group. Child can be a statement pattern, a filter, or another group.

Returns:

this

removeChild

IGroupNode<E> removeChild(E child)

Remove a child from this group.

Returns:

this

isEmpty

boolean isEmpty()

Return true iff the group is empty.

size

int size()

Return the #of children which are direct members of the group.