module DataMapper::Ext::Object

Public Class Methods

full_const_get(obj, name = nil) click to toggle source

Returns the value of the specified constant.

@overload ::full_const_get(obj, name)

Returns the value of the specified constant in +obj+.
@param [Object] obj The root object used as origin.
@param [String] name The name of the constant to get, e.g. "Merb::Router".

@overload ::full_const_get(name)

Returns the value of the fully-qualified constant.
@param [String] name The name of the constant to get, e.g. "Merb::Router".

@return [Object] The constant corresponding to name.

@api semipublic

# File lib/dm-core/support/ext/object.rb, line 17
def self.full_const_get(obj, name = nil)
  obj, name = ::Object, obj if name.nil?

  list = name.split("::")
  list.shift if DataMapper::Ext.blank?(list.first)
  list.each do |x|
    # This is required because const_get tries to look for constants in the
    # ancestor chain, but we only want constants that are HERE
    obj = obj.const_defined?(x) ? obj.const_get(x) : obj.const_missing(x)
  end
  obj
end
full_const_set(obj, name, value = nil) click to toggle source

Sets the specified constant to the given value.

@overload ::full_const_set(obj, name)

Sets the specified constant in +obj+ to the given +value+.
@param [Object] obj The root object used as origin.
@param [String] name The name of the constant to set, e.g. "Merb::Router".
@param [Object] value The value to assign to the constant.

@overload ::full_const_set(name)

Sets the fully-qualified constant to the given +value+.
@param [String] name The name of the constant to set, e.g. "Merb::Router".
@param [Object] value The value to assign to the constant.

@return [Object] The constant corresponding to name.

@api semipublic

# File lib/dm-core/support/ext/object.rb, line 46
def self.full_const_set(obj, name, value = nil)
  obj, name, value = ::Object, obj, name if value.nil?

  list = name.split("::")
  toplevel = DataMapper::Ext.blank?(list.first)
  list.shift if toplevel
  last = list.pop
  obj = list.empty? ? ::Object : DataMapper::Ext::Object.full_const_get(list.join("::"))
  obj.const_set(last, value) if obj && !obj.const_defined?(last)
end