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Contents
module Schemacop::V2
class Caster
DEFAULT_CASTERS = {
String => {
Integer => proc { |s| s.blank? ? nil : Integer(s, 10) },
Float => proc { |s| s.blank? ? nil : Float(s) }
},
Float => {
Integer => proc { |f| Integer(f) }
},
Integer => {
Float => proc { |f| Float(f) }
}
}.freeze
def initialize(casts, data, target_type)
@casts = casts
@data = data
@target_type = target_type
@caster = nil
@value = nil
if casts.is_a?(Array)
from_types = casts
elsif casts.is_a?(Hash)
from_types = casts.keys
else
fail Exceptions::InvalidSchemaError, 'Option `cast` must be either an array or a hash.'
end
return unless from_types.include?(data.class)
if (casts.is_a?(Array) && casts.include?(data.class)) || casts[data.class] == :default
@caster = DEFAULT_CASTERS[data.class][target_type]
else
@caster = casts[data.class]
end
end
def castable?
!@caster.nil?
end
def cast
fail 'Not castable.' unless castable?
return @caster.call(@data)
rescue StandardError => e
fail Exceptions::InvalidSchemaError,
"Could not cast value #{@value.inspect} to #{@target_type}: #{e.message}."
end
end
end
Version data entries
32 entries across 32 versions & 1 rubygems