Add GlobalBestUpdate component

src/component/particleSwarmOptimization/globalBestInitialization.jl

@@ -7,7 +7,7 @@ function initialize(globalBestInitialization::DefaultGlobalBestInitialization)
     @assert length(globalBestInitialization.swarm) > 0
 
     for particle in globalBestInitialization.swarm
-        add!(globalBestInitialization.globalBest, deepcopy(particle))
+        add!(globalBestInitialization.globalBest, copySolution(particle))
     end
 
     return globalBestInitialization.globalBest

src/component/particleSwarmOptimization/globalBestUpdate.jl

@@ -0,0 +1,14 @@
+struct DefaultGlobalBestUpdate <: GlobalBestUpdate
+    swarm::Vector{ContinuousSolution}
+    globalBest::CrowdingDistanceArchive
+end
+
+function update(globalBestUpdate::DefaultGlobalBestUpdate)
+    @assert length(globalBestUpdate.swarm) > 0
+
+    for solution in globalBestUpdate.swarm
+        add!(globalBestUpdate.globalBest, copySolution(solution))
+    end
+
+    return globalBestUpdate.globalBest
+end

src/core/coreTypes.jl

@@ -21,5 +21,6 @@ abstract type InertiaWeightComputingStrategy <: Component end
 abstract type VelocityInitialization <: Component end 
 abstract type GlobalBestInitialization <: Component end 
 abstract type GlobalBestSelection <: Component end 
+abstract type GlobalBestUpdate <: Component end 
 
 abstract type Archive end

src/metajul.jl

@@ -81,6 +81,9 @@ export BinaryTournamentGlobalBestSelection
 export select
 include("component/particleSwarmOptimization/globalBestSelection.jl")
 
+export DefaultGlobalBestUpdate
+export update
+include("component/particleSwarmOptimization/globalBestUpdate.jl")
 
 export normalizeObjectives, distanceBasedSubsetSelection, printObjectivesToCSVFile, printVariablesToCSVFile
 include("util/utils.jl")

test/component/particleSwarmOptimization/globalBestUpdateTest.jl

@@ -0,0 +1,40 @@
+# Unit tests for default global test update
+
+function constructorOfDefaultGlobalBestUpdateWorksProperly()
+    swarmSize = 10
+    swarm = [createContinuousSolution([1.0, 3.0]) for _ in 1:swarmSize]
+
+    globalBest = CrowdingDistanceArchive(20, ContinuousSolution)
+    globalBestUpdate = DefaultGlobalBestUpdate(swarm, globalBest) 
+
+    return swarm == globalBestUpdate.swarm && globalBest == globalBestUpdate.globalBest
+end
+
+function defaultGlobalBestUpdateWorksProperlyWhenTheSwarmHasASolution()
+    swarmSize = 1
+    swarm = [createContinuousSolution([1.0, 3.0]) for _ in 1:swarmSize]
+
+    globalBest = CrowdingDistanceArchive(20, ContinuousSolution)
+    globalBestUpdate = DefaultGlobalBestUpdate(swarm, globalBest) 
+
+    update(globalBestUpdate)
+
+    return 1 == length(getSolutions(globalBest))
+end
+
+function defaultGlobalBestUpdateWorksProperlyWhenTheSwarmHasTwoNonDominatedSolutions()
+    swarm = [createContinuousSolution([1.0, 3.0]), createContinuousSolution([3.0, 1.0])]
+
+    globalBest = CrowdingDistanceArchive(20, ContinuousSolution)
+    globalBestUpdate = DefaultGlobalBestUpdate(swarm, globalBest) 
+
+    update(globalBestUpdate)
+
+    return 2 == length(getSolutions(globalBest))
+end
+
+@testset "Global best update tests" begin    
+    @test constructorOfDefaultGlobalBestUpdateWorksProperly()    
+    @test defaultGlobalBestUpdateWorksProperlyWhenTheSwarmHasASolution()
+    @test defaultGlobalBestUpdateWorksProperlyWhenTheSwarmHasTwoNonDominatedSolutions()
+end

test/runtests.jl

@@ -32,7 +32,8 @@ componentTests = [
     "component/particleSwarmOptimization/inertiaWeightComputingStrategyTest.jl",
     "component/particleSwarmOptimization/velocityInitializationTest.jl",
     "component/particleSwarmOptimization/globalBestInitializationTest.jl",
-    "component/particleSwarmOptimization/globalBestSelectionTest.jl"
+    "component/particleSwarmOptimization/globalBestSelectionTest.jl",
+    "component/particleSwarmOptimization/globalBestUpdateTest.jl"
     ]
 
 for testProgram in componentTests