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Contents
module RGL
class EdgePropertiesMap
def initialize(edge_properties_map, directed)
@edge_properties_map = edge_properties_map
@directed = directed
check_properties
end
def edge_property(u, v)
if @directed
property = @edge_properties_map[[u, v]]
else
property = @edge_properties_map[[u, v]] || @edge_properties_map[[v, u]]
end
validate_property(property, u, v)
property
end
private
def check_properties
@edge_properties_map.each { |(u, v), property| validate_property(property, u, v) } if @edge_properties_map.respond_to?(:each)
end
def validate_property(property, u, v)
report_missing_property(property, u, v)
end
def report_missing_property(property, u, v)
raise ArgumentError.new("property of edge (#{u}, #{v}) is not defined") unless property
end
end # EdgePropertiesMap
class NonNegativeEdgePropertiesMap < EdgePropertiesMap
private
def validate_property(property, u, v)
super
report_negative_property(property, u, v)
end
def report_negative_property(property, u, v)
raise ArgumentError.new("property of edge (#{u}, #{v}) is negative") if property < 0
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems