Examples with RelationPlayer ai.grakn.graql.admin.RelationPlayer used on opensource projects

Example 1 with RelationPlayer

use of ai.grakn.graql.admin.RelationPlayer in project grakn by graknlabs.

the class RelationshipAtom method getExplicitRoles.

private Stream<Role> getExplicitRoles() {
    ReasonerQueryImpl parent = (ReasonerQueryImpl) getParentQuery();
    GraknTx graph = parent.tx();
    return getRelationPlayers().stream().map(RelationPlayer::getRole).flatMap(CommonUtil::optionalToStream).map(VarPatternAdmin::getTypeLabel).flatMap(CommonUtil::optionalToStream).map(graph::<Role>getSchemaConcept);
}

Example 2 with RelationPlayer

use of ai.grakn.graql.admin.RelationPlayer in project grakn by graknlabs.

the class RelationshipProperty method checkValidProperty.

@Override
public void checkValidProperty(GraknTx graph, VarPatternAdmin var) throws GraqlQueryException {
    Set<Label> roleTypes = relationPlayers().stream().map(RelationPlayer::getRole).flatMap(CommonUtil::optionalToStream).map(VarPatternAdmin::getTypeLabel).flatMap(CommonUtil::optionalToStream).collect(toSet());
    Optional<Label> maybeLabel = var.getProperty(IsaProperty.class).map(IsaProperty::type).flatMap(VarPatternAdmin::getTypeLabel);
    maybeLabel.ifPresent(label -> {
        SchemaConcept schemaConcept = graph.getSchemaConcept(label);
        if (schemaConcept == null || !schemaConcept.isRelationshipType()) {
            throw GraqlQueryException.notARelationType(label);
        }
    });
    // Check all role types exist
    roleTypes.forEach(roleId -> {
        SchemaConcept schemaConcept = graph.getSchemaConcept(roleId);
        if (schemaConcept == null || !schemaConcept.isRole()) {
            throw GraqlQueryException.notARoleType(roleId);
        }
    });
}

Example 3 with RelationPlayer

use of ai.grakn.graql.admin.RelationPlayer in project grakn by graknlabs.

the class RelationshipAtom method rewriteWithRelationVariable.

@Override
public RelationshipAtom rewriteWithRelationVariable() {
    VarPattern newVar = Graql.var().asUserDefined();
    VarPattern relVar = getPattern().admin().getProperty(IsaProperty.class).map(prop -> newVar.isa(prop.type())).orElse(newVar);
    for (RelationPlayer c : getRelationPlayers()) {
        VarPatternAdmin roleType = c.getRole().orElse(null);
        if (roleType != null) {
            relVar = relVar.rel(roleType, c.getRolePlayer());
        } else {
            relVar = relVar.rel(c.getRolePlayer());
        }
    }
    return create(relVar.admin(), getPredicateVariable(), getTypeId(), getParentQuery());
}

Example 4 with RelationPlayer

use of ai.grakn.graql.admin.RelationPlayer in project grakn by graknlabs.

the class RelationshipAtom method getRelationPlayerMappings.

/**
 * @param parentAtom reference atom defining the mapping
 * @param matchType type of match to be performed
 * @return set of possible COMPLETE mappings between this (child) and parent relation players
 */
private Set<List<Pair<RelationPlayer, RelationPlayer>>> getRelationPlayerMappings(RelationshipAtom parentAtom, UnifierComparison matchType) {
    Multimap<Role, RelationPlayer> childRoleRPMap = this.getRoleRelationPlayerMap();
    Map<Var, Type> childVarTypeMap = this.getParentQuery().getVarTypeMap();
    Map<Var, Type> parentVarTypeMap = parentAtom.getParentQuery().getVarTypeMap();
    // establish compatible castings for each parent casting
    List<Set<Pair<RelationPlayer, RelationPlayer>>> compatibleMappingsPerParentRP = new ArrayList<>();
    ReasonerQueryImpl childQuery = (ReasonerQueryImpl) getParentQuery();
    Set<Role> childRoles = childRoleRPMap.keySet();
    parentAtom.getRelationPlayers().stream().filter(prp -> prp.getRole().isPresent()).forEach(prp -> {
        VarPatternAdmin parentRolePattern = prp.getRole().orElse(null);
        if (parentRolePattern == null) {
            throw GraqlQueryException.rolePatternAbsent(this);
        }
        Label parentRoleLabel = parentRolePattern.getTypeLabel().orElse(null);
        if (parentRoleLabel != null) {
            Var parentRolePlayer = prp.getRolePlayer().var();
            Type parentType = parentVarTypeMap.get(parentRolePlayer);
            Set<Role> compatibleRoles = compatibleRoles(tx().getSchemaConcept(parentRoleLabel), parentType, childRoles);
            List<RelationPlayer> compatibleRelationPlayers = new ArrayList<>();
            compatibleRoles.stream().filter(childRoleRPMap::containsKey).forEach(role -> childRoleRPMap.get(role).stream().filter(crp -> {
                Var childVar = crp.getRolePlayer().var();
                Type childType = childVarTypeMap.get(childVar);
                return matchType.typePlayability(childQuery, childVar, parentType) && matchType.typeCompatibility(parentType, childType);
            }).filter(crp -> {
                IdPredicate parentId = parentAtom.getIdPredicate(prp.getRolePlayer().var());
                IdPredicate childId = this.getIdPredicate(crp.getRolePlayer().var());
                return matchType.atomicCompatibility(parentId, childId);
            }).filter(crp -> {
                ValuePredicate parentVP = parentAtom.getPredicate(prp.getRolePlayer().var(), ValuePredicate.class);
                ValuePredicate childVP = this.getPredicate(crp.getRolePlayer().var(), ValuePredicate.class);
                return matchType.atomicCompatibility(parentVP, childVP);
            }).forEach(compatibleRelationPlayers::add));
            if (!compatibleRelationPlayers.isEmpty()) {
                compatibleMappingsPerParentRP.add(compatibleRelationPlayers.stream().map(crp -> new Pair<>(crp, prp)).collect(Collectors.toSet()));
            }
        } else {
            compatibleMappingsPerParentRP.add(getRelationPlayers().stream().map(crp -> new Pair<>(crp, prp)).collect(Collectors.toSet()));
        }
    });
    return Sets.cartesianProduct(compatibleMappingsPerParentRP).stream().filter(list -> !list.isEmpty()).filter(list -> {
        List<RelationPlayer> listChildRps = list.stream().map(Pair::getKey).collect(Collectors.toList());
        // NB: this preserves cardinality instead of removing all occuring instances which is what we want
        return ReasonerUtils.subtract(listChildRps, this.getRelationPlayers()).isEmpty();
    }).filter(list -> {
        List<RelationPlayer> listParentRps = list.stream().map(Pair::getValue).collect(Collectors.toList());
        return listParentRps.containsAll(parentAtom.getRelationPlayers());
    }).collect(toSet());
}

Example 5 with RelationPlayer

use of ai.grakn.graql.admin.RelationPlayer in project grakn by graknlabs.

the class RelationshipAtom method getRoleRelationPlayerMap.

private Multimap<Role, RelationPlayer> getRoleRelationPlayerMap() {
    Multimap<Role, RelationPlayer> roleRelationPlayerMap = ArrayListMultimap.create();
    Multimap<Role, Var> roleVarMap = getRoleVarMap();
    List<RelationPlayer> relationPlayers = getRelationPlayers();
    roleVarMap.asMap().forEach((role, value) -> {
        Label roleLabel = role.getLabel();
        relationPlayers.stream().filter(rp -> rp.getRole().isPresent()).forEach(rp -> {
            VarPatternAdmin roleTypeVar = rp.getRole().orElse(null);
            Label rl = roleTypeVar != null ? roleTypeVar.getTypeLabel().orElse(null) : null;
            if (roleLabel != null && roleLabel.equals(rl)) {
                roleRelationPlayerMap.put(role, rp);
            }
        });
    });
    return roleRelationPlayerMap;
}