Class: JSONP3::OpRemove

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

Overview

The JSON Patch remove operation.

Instance Method Summary collapse

Constructor Details

#initialize(pointer) ⇒ OpRemove

Returns a new instance of OpRemove.

Parameters:



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# File 'lib/json_p3/patch.rb', line 74

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

Instance Method Details

#apply(value, index) ⇒ Object 



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# File 'lib/json_p3/patch.rb', line 83

def apply(value, index)
  parent, obj = @pointer.resolve_with_parent(value)

  if parent == JSONP3::JSONPointer::UNDEFINED && @pointer.tokens.empty?
    raise JSONPatchError,
          "can't remove root (#{name}:#{index})"
  end

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

  target = @pointer.tokens.last
  if target == JSONP3::JSONPointer::UNDEFINED
    raise JSONPatchError,
          "unexpected operation (#{name}:#{index})"
  end

  if parent.is_a?(Array)
    raise JSONPatchError, "no item to remove (#{name}:#{index})" if obj == JSONP3::JSONPointer::UNDEFINED

    parent.delete_at(target.to_i)
  elsif parent.is_a?(Hash)
    raise JSONPatchError, "no property to remove (#{name}:#{index})" if obj == JSONP3::JSONPointer::UNDEFINED

    parent.delete(target)
  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 79

def name
  "remove"
end

#to_h ⇒ Object 



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# File 'lib/json_p3/patch.rb', line 117

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