Merge branch 'master' into feature/collection-disposal

src/instance/parse.jl

@@ -23,8 +23,20 @@ function parse(json)::Instance
     validate(json, Schema(json_schema))
 
     building_period = [1]
-    if "building period (years)" in keys(json)
-        building_period = json["building period (years)"]
+    if "building period (years)" in keys(json["parameters"])
+        building_period = json["parameters"]["building period (years)"]
+    end
+
+    distance_metric = EuclideanDistance()
+    if "distance metric" in keys(json["parameters"])
+        metric_name = json["parameters"]["distance metric"]
+        if metric_name == "driving"
+            distance_metric = KnnDrivingDistance()
+        elseif metric_name == "Euclidean"
+            # nop
+        else
+            error("Unknown distance metric: $metric_name")
+        end
     end
 
     plants = Plant[]
@@ -197,5 +209,12 @@ function parse(json)::Instance
     @info @sprintf("%12d collection centers", length(collection_centers))
     @info @sprintf("%12d candidate plant locations", length(plants))
 
-    return Instance(T, products, collection_centers, plants, building_period)
+    return Instance(
+        T,
+        products,
+        collection_centers,
+        plants,
+        building_period,
+        distance_metric,
+    )
 end

src/instance/structs.jl

@@ -51,10 +51,21 @@ mutable struct Plant
     storage_cost::Vector{Float64}
 end
 
+
+abstract type DistanceMetric end
+
+Base.@kwdef mutable struct KnnDrivingDistance <: DistanceMetric
+    tree = nothing
+    ratios = nothing
+end
+
+mutable struct EuclideanDistance <: DistanceMetric end
+
 mutable struct Instance
     time::Int64
     products::Vector{Product}
     collection_centers::Vector{CollectionCenter}
     plants::Vector{Plant}
     building_period::Vector{Int64}
+    distance_metric::DistanceMetric
 end