Examples with Relationship ai.grakn.concept.Relationship used on opensource projects

Example 31 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class RelationshipAtom method inferRoles.

/**
 * attempt to infer role types of this relation and return a fresh relationship with inferred role types
 * @return either this if nothing/no roles can be inferred or fresh relation with inferred role types
 */
private RelationshipAtom inferRoles(Answer sub) {
    // return if all roles known and non-meta
    List<Role> explicitRoles = getExplicitRoles().collect(Collectors.toList());
    Map<Var, Type> varTypeMap = getParentQuery().getVarTypeMap(sub);
    boolean allRolesMeta = explicitRoles.stream().allMatch(role -> Schema.MetaSchema.isMetaLabel(role.getLabel()));
    boolean roleRecomputationViable = allRolesMeta && (!sub.isEmpty() || !Sets.intersection(varTypeMap.keySet(), getRolePlayers()).isEmpty());
    if (explicitRoles.size() == getRelationPlayers().size() && !roleRecomputationViable)
        return this;
    GraknTx graph = getParentQuery().tx();
    Role metaRole = graph.admin().getMetaRole();
    List<RelationPlayer> allocatedRelationPlayers = new ArrayList<>();
    RelationshipType relType = getSchemaConcept() != null ? getSchemaConcept().asRelationshipType() : null;
    // explicit role types from castings
    List<RelationPlayer> inferredRelationPlayers = new ArrayList<>();
    getRelationPlayers().forEach(rp -> {
        Var varName = rp.getRolePlayer().var();
        VarPatternAdmin rolePattern = rp.getRole().orElse(null);
        if (rolePattern != null) {
            Label roleLabel = rolePattern.getTypeLabel().orElse(null);
            // allocate if variable role or if label non meta
            if (roleLabel == null || !Schema.MetaSchema.isMetaLabel(roleLabel)) {
                inferredRelationPlayers.add(RelationPlayer.of(rolePattern, varName.admin()));
                allocatedRelationPlayers.add(rp);
            }
        }
    });
    // remaining roles
    // role types can repeat so no matter what has been allocated still the full spectrum of possibilities is present
    // TODO make restrictions based on cardinality constraints
    Set<Role> possibleRoles = relType != null ? relType.relates().collect(toSet()) : inferPossibleTypes(sub).stream().filter(Concept::isRelationshipType).map(Concept::asRelationshipType).flatMap(RelationshipType::relates).collect(toSet());
    // possible role types for each casting based on its type
    Map<RelationPlayer, Set<Role>> mappings = new HashMap<>();
    getRelationPlayers().stream().filter(rp -> !allocatedRelationPlayers.contains(rp)).forEach(rp -> {
        Var varName = rp.getRolePlayer().var();
        Type type = varTypeMap.get(varName);
        mappings.put(rp, top(type != null ? compatibleRoles(type, possibleRoles) : possibleRoles));
    });
    // allocate all unambiguous mappings
    mappings.entrySet().stream().filter(entry -> entry.getValue().size() == 1).forEach(entry -> {
        RelationPlayer rp = entry.getKey();
        Var varName = rp.getRolePlayer().var();
        Role role = Iterables.getOnlyElement(entry.getValue());
        VarPatternAdmin rolePattern = Graql.var().label(role.getLabel()).admin();
        inferredRelationPlayers.add(RelationPlayer.of(rolePattern, varName.admin()));
        allocatedRelationPlayers.add(rp);
    });
    // fill in unallocated roles with metarole
    getRelationPlayers().stream().filter(rp -> !allocatedRelationPlayers.contains(rp)).forEach(rp -> {
        Var varName = rp.getRolePlayer().var();
        VarPatternAdmin rolePattern = rp.getRole().orElse(null);
        rolePattern = rolePattern != null ? rolePattern.var().label(metaRole.getLabel()).admin() : Graql.var().label(metaRole.getLabel()).admin();
        inferredRelationPlayers.add(RelationPlayer.of(rolePattern, varName.admin()));
    });
    VarPattern relationPattern = relationPattern(getVarName(), inferredRelationPlayers);
    VarPatternAdmin newPattern = (isDirect() ? relationPattern.directIsa(getPredicateVariable()) : relationPattern.isa(getPredicateVariable())).admin();
    return create(newPattern, getPredicateVariable(), getTypeId(), getParentQuery());
}

Example 32 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class AttributeTest method whenGettingTheRelationsOfResources_EnsureIncomingResourceEdgesAreTakingIntoAccount.

@Test
public void whenGettingTheRelationsOfResources_EnsureIncomingResourceEdgesAreTakingIntoAccount() {
    AttributeType<String> attributeType = tx.putAttributeType("Attribute Type Thingy", AttributeType.DataType.STRING);
    Attribute<String> attribute = attributeType.putAttribute("Thingy");
    EntityType entityType = tx.putEntityType("Entity Type Thingy").key(attributeType);
    Entity e1 = entityType.addEntity();
    Entity e2 = entityType.addEntity();
    assertThat(attribute.relationships().collect(toSet()), empty());
    e1.attribute(attribute);
    e2.attribute(attribute);
    Relationship rel1 = Iterables.getOnlyElement(e1.relationships().collect(toSet()));
    Relationship rel2 = Iterables.getOnlyElement(e2.relationships().collect(toSet()));
    assertThat(attribute.relationships().collect(toSet()), containsInAnyOrder(rel1, rel2));
}

Example 33 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class GraknTxJanusTest method whenLookingUpRelationEdgeViaConceptId_EnsureTheRelationEdgeIsReturned.

@Test
public void whenLookingUpRelationEdgeViaConceptId_EnsureTheRelationEdgeIsReturned() {
    AttributeType<String> attributeType = graknTx.putAttributeType("Looky a attribute type", AttributeType.DataType.STRING);
    Attribute<String> attribute = attributeType.putAttribute("A Attribute Thing");
    EntityType entityType = graknTx.putEntityType("My entity").attribute(attributeType);
    Relationship relationship = Iterators.getOnlyElement(entityType.addEntity().attribute(attribute).relationships().iterator());
    // Closing so the cache is not accessed when doing the lookup
    graknTx.commit();
    graknTx = janusGraphFactory.open(GraknTxType.WRITE);
    assertEquals(relationship, graknTx.getConcept(relationship.getId()));
}

Example 34 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class RemoteConceptsTest method whenCallingAddRelationship_ExecuteAConceptMethod.

@Test
public void whenCallingAddRelationship_ExecuteAConceptMethod() {
    Relationship relationship = RemoteConcepts.createRelationship(tx, A);
    mockConceptMethod(ConceptMethods.ADD_RELATIONSHIP, relationship);
    assertEquals(relationship, relationshipType.addRelationship());
}

Example 35 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class RemoteConceptsTest method whenCallingAddAttributeOnThing_ExecuteAConceptMethod.

@Test
public void whenCallingAddAttributeOnThing_ExecuteAConceptMethod() {
    Attribute<Long> attribute = RemoteConcepts.createAttribute(tx, A);
    Relationship relationship = RemoteConcepts.createRelationship(tx, C);
    mockConceptMethod(ConceptMethods.setAttribute(attribute), relationship);
    assertEquals(thing, thing.attribute(attribute));
    verifyConceptMethodCalled(ConceptMethods.setAttribute(attribute));
}