Struct vrp_core::models::FeatureBuilder

pub struct FeatureBuilder(/* private fields */);

Provides a way to build feature with some checks.

Implementations

impl FeatureBuilder

pub fn from_feature(feature: Feature) -> Self

Creates a builder from another feature.

pub fn with_name(self, name: &str) -> Self

Sets given name.

Examples found in repository

examples/custom_constraint.rs (line 111)

fn define_goal(transport: Arc<dyn TransportCost + Send + Sync>) -> GenericResult<GoalContext> {
    let minimize_unassigned = MinimizeUnassignedBuilder::new("min-unassigned").build()?;
    let capacity_feature = CapacityFeatureBuilder::<SingleDimLoad>::new("capacity").build()?;
    let transport_feature = TransportFeatureBuilder::new("min-distance")
        .set_transport_cost(transport)
        .set_time_constrained(false)
        .build_minimize_distance()?;
    // create our custom feature
    let hardware_feature = FeatureBuilder::default()
        .with_name("hardware")
        .with_constraint(HardwareConstraint { code: ViolationCode::default() })
        .build()?;

    // configure goal of optimization
    GoalContextBuilder::with_features(&[minimize_unassigned, transport_feature, capacity_feature, hardware_feature])?
        .build()
}

examples/custom_objective.rs (line 127)

fn define_goal(transport: Arc<dyn TransportCost + Send + Sync>) -> GenericResult<GoalContext> {
    let minimize_unassigned = MinimizeUnassignedBuilder::new("min-unassigned").build()?;
    let capacity_feature = CapacityFeatureBuilder::<SingleDimLoad>::new("capacity").build()?;
    let transport_feature = TransportFeatureBuilder::new("min-distance")
        .set_transport_cost(transport)
        .set_time_constrained(false)
        .build_minimize_distance()?;

    // create our custom feature that consists of an objective and a state
    let priority_feature = FeatureBuilder::default()
        .with_name("maximize-priority")
        .with_objective(PriorityObjective)
        .with_state(PriorityState)
        .build()?;

    // configure goal of optimization
    GoalContextBuilder::with_features(&[priority_feature, minimize_unassigned, transport_feature, capacity_feature])?
        .build()
}

pub fn with_constraint<T: FeatureConstraint + 'static>( self, constraint: T, ) -> Self

Adds given constraint.

Examples found in repository

examples/custom_constraint.rs (line 112)

fn define_goal(transport: Arc<dyn TransportCost + Send + Sync>) -> GenericResult<GoalContext> {
    let minimize_unassigned = MinimizeUnassignedBuilder::new("min-unassigned").build()?;
    let capacity_feature = CapacityFeatureBuilder::<SingleDimLoad>::new("capacity").build()?;
    let transport_feature = TransportFeatureBuilder::new("min-distance")
        .set_transport_cost(transport)
        .set_time_constrained(false)
        .build_minimize_distance()?;
    // create our custom feature
    let hardware_feature = FeatureBuilder::default()
        .with_name("hardware")
        .with_constraint(HardwareConstraint { code: ViolationCode::default() })
        .build()?;

    // configure goal of optimization
    GoalContextBuilder::with_features(&[minimize_unassigned, transport_feature, capacity_feature, hardware_feature])?
        .build()
}

pub fn with_objective<T: FeatureObjective + 'static>(self, objective: T) -> Self

Adds given objective.

Examples found in repository

examples/custom_objective.rs (line 128)

fn define_goal(transport: Arc<dyn TransportCost + Send + Sync>) -> GenericResult<GoalContext> {
    let minimize_unassigned = MinimizeUnassignedBuilder::new("min-unassigned").build()?;
    let capacity_feature = CapacityFeatureBuilder::<SingleDimLoad>::new("capacity").build()?;
    let transport_feature = TransportFeatureBuilder::new("min-distance")
        .set_transport_cost(transport)
        .set_time_constrained(false)
        .build_minimize_distance()?;

    // create our custom feature that consists of an objective and a state
    let priority_feature = FeatureBuilder::default()
        .with_name("maximize-priority")
        .with_objective(PriorityObjective)
        .with_state(PriorityState)
        .build()?;

    // configure goal of optimization
    GoalContextBuilder::with_features(&[priority_feature, minimize_unassigned, transport_feature, capacity_feature])?
        .build()
}

pub fn with_state<T: FeatureState + 'static>(self, state: T) -> Self

Adds given state.

Examples found in repository

examples/custom_objective.rs (line 129)

fn define_goal(transport: Arc<dyn TransportCost + Send + Sync>) -> GenericResult<GoalContext> {
    let minimize_unassigned = MinimizeUnassignedBuilder::new("min-unassigned").build()?;
    let capacity_feature = CapacityFeatureBuilder::<SingleDimLoad>::new("capacity").build()?;
    let transport_feature = TransportFeatureBuilder::new("min-distance")
        .set_transport_cost(transport)
        .set_time_constrained(false)
        .build_minimize_distance()?;

    // create our custom feature that consists of an objective and a state
    let priority_feature = FeatureBuilder::default()
        .with_name("maximize-priority")
        .with_objective(PriorityObjective)
        .with_state(PriorityState)
        .build()?;

    // configure goal of optimization
    GoalContextBuilder::with_features(&[priority_feature, minimize_unassigned, transport_feature, capacity_feature])?
        .build()
}

pub fn build(self) -> Result<Feature, GenericError>

Tries to build a feature.

Examples found in repository

examples/custom_constraint.rs (line 113)

fn define_goal(transport: Arc<dyn TransportCost + Send + Sync>) -> GenericResult<GoalContext> {
    let minimize_unassigned = MinimizeUnassignedBuilder::new("min-unassigned").build()?;
    let capacity_feature = CapacityFeatureBuilder::<SingleDimLoad>::new("capacity").build()?;
    let transport_feature = TransportFeatureBuilder::new("min-distance")
        .set_transport_cost(transport)
        .set_time_constrained(false)
        .build_minimize_distance()?;
    // create our custom feature
    let hardware_feature = FeatureBuilder::default()
        .with_name("hardware")
        .with_constraint(HardwareConstraint { code: ViolationCode::default() })
        .build()?;

    // configure goal of optimization
    GoalContextBuilder::with_features(&[minimize_unassigned, transport_feature, capacity_feature, hardware_feature])?
        .build()
}

examples/custom_objective.rs (line 130)

fn define_goal(transport: Arc<dyn TransportCost + Send + Sync>) -> GenericResult<GoalContext> {
    let minimize_unassigned = MinimizeUnassignedBuilder::new("min-unassigned").build()?;
    let capacity_feature = CapacityFeatureBuilder::<SingleDimLoad>::new("capacity").build()?;
    let transport_feature = TransportFeatureBuilder::new("min-distance")
        .set_transport_cost(transport)
        .set_time_constrained(false)
        .build_minimize_distance()?;

    // create our custom feature that consists of an objective and a state
    let priority_feature = FeatureBuilder::default()
        .with_name("maximize-priority")
        .with_objective(PriorityObjective)
        .with_state(PriorityState)
        .build()?;

    // configure goal of optimization
    GoalContextBuilder::with_features(&[priority_feature, minimize_unassigned, transport_feature, capacity_feature])?
        .build()
}

Trait Implementations

impl Default for FeatureBuilder

fn default() -> FeatureBuilder

Returns the “default value” for a type.