Class: JSONP3::OpAdd

Inherits:
Op
  • Object
show all
Defined in:
lib/json_p3/patch.rb

Overview

The JSON Patch add operation.

Instance Method Summary collapse

Constructor Details

#initialize(pointer, value) ⇒ OpAdd

Returns a new instance of OpAdd.

Parameters:



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# File 'lib/json_p3/patch.rb', line 29

def initialize(pointer, value)
  super()
  @pointer = pointer
  @value = value
end

Instance Method Details

#apply(value, index) ⇒ Object 



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# File 'lib/json_p3/patch.rb', line 39

def apply(value, index)
  parent, obj = @pointer.resolve_with_parent(value)
  return @value if parent == JSONP3::JSONPointer::UNDEFINED && @pointer.tokens.empty?

  if parent == JSONP3::JSONPointer::UNDEFINED
    raise JSONPatchError,
          "no such property or item '#{@pointer.parent}' (#{name}:#{index})"
  end

  target = @pointer.tokens.last
  if parent.is_a?(Array)
    if obj == JSONP3::JSONPointer::UNDEFINED
      raise JSONPatchError, "index out of range (#{name}:#{index})" unless target == "-"

      parent << @value
    else
      parent.insert(target.to_i, @value)
    end
  elsif parent.is_a?(Hash)
    parent[target] = @value
  else
    raise JSONPatchError, "unexpected operation on #{parent.class} (#{name}:#{index})"
  end

  value
end

#name ⇒ Object 



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# File 'lib/json_p3/patch.rb', line 35

def name
  "add"
end

#to_h ⇒ Object 



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# File 'lib/json_p3/patch.rb', line 66

def to_h
  { "op" => name, "path" => @pointer.to_s, "value" => @value }
end