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Contents
# TITLE:
#
# Reflection
#
# SUMMARY:
#
# Provides externailze, safe access to an object's meta-information.
#
# COPYRIGHT:
#
# Copyright (c) 2006 Thomas Sawyer
#
# LICENSE:
#
# Ruby License
#
# This module is free software. You may use, modify, and/or redistribute this
# software under the same terms as Ruby.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.
#
# AUTHORS:
#
# - Thomas Sawyer
#
class << ObjectSpace
alias_method :[], :_id2ref
end
#
class ObjectReflection
REFLECTION_METHODS = [
:object_id, :class, :methods, :send
] + Kernel.instance_methods.select{ |m| m =~ /^object_/ }
def initialize(object)
@self = object
@meta = REFLECTION_METHODS.inject({}) do |rproc, meth|
rproc[meth.to_sym] = Kernel.instance_method(meth).bind(@self)
rproc
end
end
#
def id
@meta[:object_id].call
end
REFLECTION_METHODS.each do |meth|
meth = meth[7..-1] if meth =~ /^object_/
module_eval %{
def #{meth}(*a,&b)
rproc[:#{meth}].call(*a,&b)
end
}
end
end
#
class InstanceReflection < ObjectReflection
REFLECTION_METHODS = [
:send
] + Kernel.instance_methods.select{ |m| m =~ /^instance_/ }
def initialize(object)
@self = object
@meta = REFLECTION_METHODS.inject({}) do |rproc, meth|
rproc[meth.to_sym] = Kernel.instance_method(meth).bind(@self)
rproc
end
end
REFLECTION_METHODS.each do |meth|
meth = meth[7..-1] if meth =~ /^instance_/
module_eval %{
def #{meth}(*a,&b)
rproc[:#{meth}].call(*a,&b)
end
}
end
end
module Kernel
def object
@_object_reflection ||= ObjectReflection.new(self)
end
def instance
@_instance_reflection ||= InstanceReflection.new(self)
end
end
Version data entries
13 entries across 13 versions & 1 rubygems