ai.grakn.graql.internal.gremlin.fragment

Class OutIsaFragment

java.lang.Object

ai.grakn.graql.internal.gremlin.fragment.Fragment

ai.grakn.graql.internal.gremlin.fragment.OutIsaFragment

public abstract class OutIsaFragment
extends Fragment

A fragment representing traversing an isa edge from instance to type.

Author:

Felix Chapman

Property Summary

Properties inherited from class ai.grakn.graql.internal.gremlin.fragment.Fragment

varProperty

Field Summary

Fields inherited from class ai.grakn.graql.internal.gremlin.fragment.Fragment

SHARD_LOAD_FACTOR

Constructor Summary

Constructors

Constructor and Description
OutIsaFragment()

Method Summary

Modifier and Type	Method and Description
org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal<org.apache.tinkerpop.gremlin.structure.Vertex,? extends org.apache.tinkerpop.gremlin.structure.Element>	applyTraversalInner(org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal<org.apache.tinkerpop.gremlin.structure.Vertex,? extends org.apache.tinkerpop.gremlin.structure.Element> traversal, GraknTx graph, Collection<Var> vars)
boolean	canOperateOnEdges() Indicates whether the fragment can be used on an Edge as well as a Vertex.
Set<Weighted<DirectedEdge<Node>>>	directedEdges(Map<NodeId,Node> nodes, Map<Node,Map<Node,Fragment>> edges) Convert the fragment to a set of weighted edges for query planning
abstract Var	end()
double	internalFragmentCost()
String	name() The name of the fragment

Methods inherited from class ai.grakn.graql.internal.gremlin.fragment.Fragment

applyTraversal, dependencies, fragmentCost, getInverse, getShardCount, hasFixedFragmentCost, isStartingFragment, setAccurateFragmentCost, start, toString, transform, varProperty, vars

Methods inherited from class java.lang.Object

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

Constructor Detail

OutIsaFragment

public OutIsaFragment()

Method Detail

end

public abstract Var end()

Overrides:

end in class Fragment

Returns:

the variable name that this fragment ends at in the query, if this query has an end variable

applyTraversalInner

public org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal<org.apache.tinkerpop.gremlin.structure.Vertex,? extends org.apache.tinkerpop.gremlin.structure.Element> applyTraversalInner(org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal<org.apache.tinkerpop.gremlin.structure.Vertex,? extends org.apache.tinkerpop.gremlin.structure.Element> traversal,
                                                                                                                                                                                                           GraknTx graph,
                                                                                                                                                                                                           Collection<Var> vars)

Parameters:

traversal - the traversal to extend with this Fragment

graph - the graph to execute the traversal on

name

public String name()

Description copied from class: Fragment

The name of the fragment

Specified by:

name in class Fragment

internalFragmentCost

public double internalFragmentCost()

Specified by:

internalFragmentCost in class Fragment

directedEdges

public Set<Weighted<DirectedEdge<Node>>> directedEdges(Map<NodeId,Node> nodes,
                                                       Map<Node,Map<Node,Fragment>> edges)

Description copied from class: Fragment

Convert the fragment to a set of weighted edges for query planning

Overrides:

directedEdges in class Fragment

Parameters:

nodes - all nodes in the query

edges - a mapping from edge(child, parent) to its corresponding fragment

Returns:

a set of edges

canOperateOnEdges

public boolean canOperateOnEdges()

Description copied from class: Fragment

Indicates whether the fragment can be used on an Edge as well as a Vertex.

Overrides:

canOperateOnEdges in class Fragment