Class: DataContract::Contract
- Inherits:
-
Object
- Object
- DataContract::Contract
- Defined in:
- lib/data_contract/contract.rb
Instance Attribute Summary collapse
-
#mod ⇒ Object
readonly
Returns the value of attribute mod.
-
#obj ⇒ Object
readonly
Returns the value of attribute obj.
Instance Method Summary collapse
- #assign(val, receiver, attribute) ⇒ Object
- #assignable?(other_obj) ⇒ Boolean
- #compatible?(other_obj) ⇒ Boolean
- #getters ⇒ Object
-
#initialize(mod, obj) ⇒ Contract
constructor
A new instance of Contract.
- #scatter(receiver) ⇒ Object
- #setters ⇒ Object
- #shared?(other_obj) ⇒ Boolean
Constructor Details
#initialize(mod, obj) ⇒ Contract
Returns a new instance of Contract.
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# File 'lib/data_contract/contract.rb', line 6 def initialize(mod, obj) @mod = mod @obj = obj end |
Instance Attribute Details
#mod ⇒ Object (readonly)
Returns the value of attribute mod.
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# File 'lib/data_contract/contract.rb', line 3 def mod @mod end |
#obj ⇒ Object (readonly)
Returns the value of attribute obj.
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# File 'lib/data_contract/contract.rb', line 4 def obj @obj end |
Instance Method Details
#assign(val, receiver, attribute) ⇒ Object
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# File 'lib/data_contract/contract.rb', line 47 def assign(val, receiver, attribute) setter = "#{attribute}=" unless receiver.respond_to?(setter, true) raise ContractError, "The #{attribute} attribute cannot be assigned to #{receiver.class.name}" end receiver.send setter, val end |
#assignable?(other_obj) ⇒ Boolean
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# File 'lib/data_contract/contract.rb', line 30 def assignable?(other_obj) unless shared? other_obj unless compatible? other_obj return false end end true end |
#compatible?(other_obj) ⇒ Boolean
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# File 'lib/data_contract/contract.rb', line 19 def compatible?(other_obj) mod.instance_methods(false).each do |m| return false unless other_obj.respond_to?(m, true) end return true end |
#getters ⇒ Object
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# File 'lib/data_contract/contract.rb', line 15 def getters mod.instance_methods(false).select { |m| m.to_s[-1, 1] != '=' } end |
#scatter(receiver) ⇒ Object
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# File 'lib/data_contract/contract.rb', line 39 def scatter(receiver) getters.each do |attribute| val = obj.send attribute assign val, receiver, attribute end receiver end |
#setters ⇒ Object
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# File 'lib/data_contract/contract.rb', line 11 def setters mod.instance_methods(false).select { |m| m.to_s[-1, 1] == '=' } end |
#shared?(other_obj) ⇒ Boolean
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# File 'lib/data_contract/contract.rb', line 26 def shared?(other_obj) other_obj.is_a? mod end |