Sha256: da33f83b6fabb77012875ebae73d8d220424b023140d0edfefb7f60d82a6f295
Contents?: true
Size: 979 Bytes
Versions: 4
Compression:
Stored size: 979 Bytes
Contents
# frozen_string_literal: true
module Arel
module Visitors
class Visitor
def initialize
@dispatch = get_dispatch_cache
end
def accept object
visit object
end
private
def self.dispatch_cache
Hash.new do |hash, klass|
hash[klass] = "visit_#{(klass.name || '').gsub('::', '_')}"
end
end
def get_dispatch_cache
self.class.dispatch_cache
end
def dispatch
@dispatch
end
def visit object
dispatch_method = dispatch[object.class]
send dispatch_method, object
rescue NoMethodError => e
raise e if respond_to?(dispatch_method, true)
superklass = object.class.ancestors.find { |klass|
respond_to?(dispatch[klass], true)
}
raise(TypeError, "Cannot visit #{object.class}") unless superklass
dispatch[object.class] = dispatch[superklass]
retry
end
end
end
end
Version data entries
4 entries across 4 versions & 3 rubygems