ai.grakn.graql.internal.gremlin

Class ShortcutTraversal

java.lang.Object

ai.grakn.graql.internal.gremlin.ShortcutTraversal

public class ShortcutTraversal
extends Object

some VarTraversals can be represented using shortcut edges. ShortcutTraversal represents this pattern in order to improve query performance

A VarTraversals can be represented by a shortcut edge when:

• it represents a relation
• the relation has no internal properties or resources specified (id, value ...)
• the relation has exactly two roleplayers
• if the type and role-types are specified, they are specified only by id and no other properties
• the relation has not been given a variable name

Constructor Summary

Constructors

Constructor and Description
ShortcutTraversal()

Method Summary

Modifier and Type	Method and Description
void	addRel(String roletype, VarName roleplayer)
void	addRel(VarName roleplayer)
void	setInvalid() Make this ShortcutTraversal invalid, so it will not be used in the traversal
void	setType(String type)

Methods inherited from class java.lang.Object

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

Constructor Detail

ShortcutTraversal

public ShortcutTraversal()

Method Detail

setInvalid

public void setInvalid()

Make this ShortcutTraversal invalid, so it will not be used in the traversal

setType

public void setType(String type)

Parameters:

type - the type of the variable this ShortcutTraversal represents

addRel

public void addRel(VarName roleplayer)

Parameters:

roleplayer - a roleplayer of the relation that this ShortcutTraversal represents

addRel

public void addRel(String roletype,
                   VarName roleplayer)

Parameters:

roletype - the role type of the given roleplayer

roleplayer - a roleplayer of the relation that this ShortcutTraversal represents