Class: JSON::Hunk

Inherits:
Object
  • Object
show all
Defined in:
lib/json/patch.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attributes = {}) ⇒ Hunk

Returns a new instance of Hunk.



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# File 'lib/json/patch.rb', line 31

def initialize(attributes={})
  op = case
       when attributes.has_key?('add') then 'add'
       when attributes.has_key?('remove') then 'remove'
       when attributes.has_key?('replace') then 'replace'
       end
  if op
    @op = op.to_sym
  else
    raise ArgumentError
  end
  self.path = attributes[op]
  @value = attributes['value']
end

Instance Attribute Details

#op ⇒ Object (readonly)

Returns the value of attribute op.



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# File 'lib/json/patch.rb', line 29

def op
  @op
end

#path ⇒ Object

Returns the value of attribute path.



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# File 'lib/json/patch.rb', line 29

def path
  @path
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/json/patch.rb', line 29

def value
  @value
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/json/patch.rb', line 65

def ==(other)
  op == other.op and path == other.path and value = other.value
end

#resolve_path(object) ⇒ Object

Given a root object, resolve the paths in this patch. Return a tuple of the object and element to be modified.

For example (from the specs):

OpenStruct.new(:foo => 1, :bar => OpenStruct.new(:baz => 2)) JSON::Hunk.new(‘add’ => ‘/bar/baz’).resolve_path(obj).should == [obj.bar, :baz]



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# File 'lib/json/patch.rb', line 59

def resolve_path(object)
  path_to_element = path[0..-2]
  element = path[-1]
  [path_to_element.inject(object) {|o, e| o.send(e) }, element]
end