ai.grakn.graql.internal.pattern.property

Class HasResourceProperty

java.lang.Object

ai.grakn.graql.internal.pattern.property.HasResourceProperty

All Implemented Interfaces:

VarProperty, VarPropertyInternal

public class HasResourceProperty
extends Object

Represents the has property on an Instance. This property can be queried, inserted or deleted. The property is defined as a relationship between an Instance and a Resource, where the Resource is of a particular type. When matching, shortcut edges are used to speed up the traversal. The type of the relationship does not matter. When inserting, an implicit relation is created between the instance and the resource, using type names derived from the name of the resource type.

Author:

Felix Chapman

Constructor Summary

Constructors

Constructor and Description
HasResourceProperty(TypeName resourceType, VarAdmin resource)
HasResourceProperty(VarAdmin resource)

Method Summary

Modifier and Type	Method and Description
default void	buildString(StringBuilder builder)
void	checkValid(GraknGraph graph, VarAdmin var) Check if the given property can be used in a match query
void	delete(GraknGraph graph, Concept concept) Delete the given property from the graph, if possible.
boolean	equals(Object o)
java.util.stream.Stream<VarAdmin>	getImplicitInnerVars()
java.util.stream.Stream<VarAdmin>	getInnerVars()
String	getName()
String	getProperty()
VarAdmin	getResource()
Optional<TypeName>	getType()
java.util.stream.Stream<VarAdmin>	getTypes()
int	hashCode()
void	insert(InsertQueryExecutor insertQueryExecutor, Concept concept) Insert the given property into the graph, if possible.
Atomic	mapToAtom(VarAdmin var, Set<VarAdmin> vars, ReasonerQuery parent)
Collection<EquivalentFragmentSet>	match(VarName start) Return a collection of EquivalentFragmentSet to match the given property in the graph

Methods inherited from class java.lang.Object

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

Methods inherited from interface ai.grakn.graql.internal.pattern.property.VarPropertyInternal

checkInsertable, checkValid, modifyShortcutTraversal

Methods inherited from interface ai.grakn.graql.admin.VarProperty

getImplicitInnerVars, graqlString, isUnique

Constructor Detail

HasResourceProperty

public HasResourceProperty(VarAdmin resource)

HasResourceProperty

public HasResourceProperty(TypeName resourceType,
                           VarAdmin resource)

Method Detail

getType

public Optional<TypeName> getType()

getResource

public VarAdmin getResource()

getName

public String getName()

getProperty

public String getProperty()

match

public Collection<EquivalentFragmentSet> match(VarName start)

Description copied from interface: VarPropertyInternal

Return a collection of EquivalentFragmentSet to match the given property in the graph

Specified by:

match in interface VarPropertyInternal

getInnerVars

public java.util.stream.Stream<VarAdmin> getInnerVars()

Specified by:

getInnerVars in interface VarProperty

Specified by:

getInnerVars in interface VarPropertyInternal

insert

public void insert(InsertQueryExecutor insertQueryExecutor,
                   Concept concept)
            throws IllegalStateException

Description copied from interface: VarPropertyInternal

Insert the given property into the graph, if possible.

Specified by:

insert in interface VarPropertyInternal

Parameters:

insertQueryExecutor - the instance handling the insert query

concept - the concept to insert a property on

Throws:

IllegalStateException

delete

public void delete(GraknGraph graph,
                   Concept concept)

Description copied from interface: VarPropertyInternal

Delete the given property from the graph, if possible.

Specified by:

delete in interface VarPropertyInternal

Parameters:

graph - the graph to operate on

concept - the concept to delete properties of

getTypes

public java.util.stream.Stream<VarAdmin> getTypes()

Specified by:

getTypes in interface VarProperty

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

mapToAtom

public Atomic mapToAtom(VarAdmin var,
                        Set<VarAdmin> vars,
                        ReasonerQuery parent)

Specified by:

mapToAtom in interface VarProperty

buildString

public void buildString(StringBuilder builder)

Specified by:

buildString in interface VarProperty

checkValid

public final void checkValid(GraknGraph graph,
                             VarAdmin var)
                      throws IllegalStateException

Description copied from interface: VarPropertyInternal

Check if the given property can be used in a match query

Specified by:

checkValid in interface VarPropertyInternal

Throws:

IllegalStateException

getImplicitInnerVars

public java.util.stream.Stream<VarAdmin> getImplicitInnerVars()

Specified by:

getImplicitInnerVars in interface VarProperty