Sha256: 91c9f1c3fd30be8aa052a5eab35fc856e91281d1737a2e75f0885fba551172b2
Contents?: true
Size: 914 Bytes
Versions: 30
Compression:
Stored size: 914 Bytes
Contents
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
send dispatch[object.class], object
rescue NoMethodError => e
raise e if respond_to?(dispatch[object.class], 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
30 entries across 29 versions & 9 rubygems