Module: DataMapper::Ext::Object

### Home Classes Methods

### In Files

- lib/dm-core/support/ext/object.rb

### Methods

- ::full_const_get
- ::full_const_set

### Files

- LICENSE
- README.rdoc

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# 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

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