Enum Concept

pub enum Concept {
    EntityType(EntityType),
    RelationType(RelationType),
    RoleType(RoleType),
    AttributeType(AttributeType),
    Entity(Entity),
    Relation(Relation),
    Attribute(Attribute),
    Value(Value),
}

The fundamental TypeQL object.

Variants

EntityType(EntityType)

RelationType(RelationType)

RoleType(RoleType)

AttributeType(AttributeType)

Entity(Entity)

Relation(Relation)

Attribute(Attribute)

Value(Value)

Implementations

impl Concept

pub fn get_iid(&self) -> Option<&IID>

Get the IID of this concept, if it exists. If this is an Entity or Relation Instance, return the IID of the instance. Otherwise, return empty

pub fn get_value_type(&self) -> Option<ValueType>

Get the value type enum of the concept, if it exists If this is an Attribute Instance, return the value type of the value of this instance. If this is a Value, return the value type of the value. If this is an Attribute Type, it returns value type that the schema permits for the attribute type, if one is defined. Otherwise, return empty.

pub fn get_value(&self) -> Option<&Value>

Get the value of this concept, if it exists. If this is an Attribute Instance, return the value of this instance. If this a Value, return the value. Otherwise, return empty.

pub fn get_boolean(&self) -> Option<bool>

Get the boolean value of this concept, if it exists. If this is a boolean-valued Attribute Instance, return the boolean value of this instance. If this a boolean-valued Value, return the boolean value. Otherwise, return empty.

pub fn get_long(&self) -> Option<i64>

Get the long value of this concept, if it exists. If this is a long-valued Attribute Instance, return the long value of this instance. If this a long-valued Value, return the long value. Otherwise, return empty.

pub fn get_double(&self) -> Option<f64>

Get the double value of this concept, if it exists. If this is a double-valued Attribute Instance, return the double value of this instance. If this a double-valued Value, return the double value. Otherwise, return empty.

pub fn get_decimal(&self) -> Option<Decimal>

Get the fixed-decimal value of this concept, if it exists. If this is a fixed-decimal valued Attribute Instance, return the fixed-decimal value of this instance. If this a fixed-decimal valued Value, return the fixed-decimal value. Otherwise, return empty.

pub fn get_string(&self) -> Option<&str>

Get the string value of this concept, if it exists. If this is a string-valued Attribute Instance, return the string value of this instance. If this a string-valued Value, return the string value. Otherwise, return empty.

pub fn get_date(&self) -> Option<NaiveDate>

Get the date value of this concept, if it exists. If this is a date-valued Attribute Instance, return the date value of this instance. If this a date-valued Value, return the date value. Otherwise, return empty.

pub fn get_datetime(&self) -> Option<NaiveDateTime>

Get the datetime value of this concept, if it exists. If this is a datetime-valued Attribute Instance, return the datetime value of this instance. If this a datetime-valued Value, return the datetime value. Otherwise, return empty.

pub fn get_datetime_tz(&self) -> Option<DateTime<Tz>>

Get the timezoned-datetime value of this concept, if it exists. If this is a timezoned-datetime valued Attribute Instance, return the timezoned-datetime value of this instance. If this a timezoned-datetime valued Value, return the timezoned-datetime value. Otherwise, return empty.

pub fn get_duration(&self) -> Option<Duration>

Get the duration value of this concept, if it exists. If this is a duration-valued Attribute Instance, return the duration value of this instance. If this a duration-valued Value, return the duration value. Otherwise, return empty.

pub fn get_category(&self) -> ConceptCategory

Get the category of this concept

pub fn is_type(&self) -> bool

Check if this concept represents a Type from the schema of the database. These are exactly: Entity Types, Relation Types, Role Types, and Attribute Types

Equivalent to:

concept.is_entity_type() || concept.is_relation_type() || concept.is_role_type() || concept.is_attribute_type()

pub fn is_entity_type(&self) -> bool

Check if this concept represents an Entity Type from the schema of the database

pub fn is_relation_type(&self) -> bool

Check if this concept represents a Relation Type from the schema of the database

pub fn is_role_type(&self) -> bool

Check if this concept represents a Role Type from the schema of the database

pub fn is_attribute_type(&self) -> bool

Check if this concept represents an Attribute Type from the schema of the database

pub fn is_instance(&self) -> bool

Check if this concept represents a stored database instance from the database. These are exactly: Entity, Relation, and Attribute

Equivalent to:

concept.is_entity() || concept.is_relation() ||  concept.is_attribute()

pub fn is_entity(&self) -> bool

Check if this concept represents an Entity instance from the database

pub fn is_relation(&self) -> bool

Check if this concept represents an Relation instance from the database

pub fn is_attribute(&self) -> bool

Check if this concept represents an Attribute instance from the database

pub fn is_value(&self) -> bool

Check if this concept represents a Value returned by the database

pub fn is_boolean(&self) -> bool

Check if this concept holds a boolean, either in an Attribute or as a Value

pub fn is_long(&self) -> bool

Check if this concept holds a long, either in an Attribute or as a Value

pub fn is_decimal(&self) -> bool

Check if this concept holds a fixed-decimal, either in an Attribute or as a Value

pub fn is_double(&self) -> bool

Check if this concept holds a double, either in an Attribute or as a Value

pub fn is_string(&self) -> bool

Check if this concept holds a string, either in an Attribute or as a Value

pub fn is_date(&self) -> bool

Check if this concept holds a date, either in an Attribute or as a Value

pub fn is_datetime(&self) -> bool

Check if this concept holds a datetime, either in an Attribute or as a Value

pub fn is_datetime_tz(&self) -> bool

Check if this concept holds a timezoned-datetime, either in an Attribute or as a Value

pub fn is_duration(&self) -> bool

Check if this concept holds a duration, either in an Attribute or as a Value

Trait Implementations

impl Clone for Concept

fn clone(&self) -> Concept

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Concept

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Concept

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Concept

fn eq(&self, other: &Concept) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Concept