Class: JSONP3::NameSelector

Inherits:
Selector show all
Defined in:
lib/json_p3/selector.rb

Overview

The name selector select values from hashes given a key.

Direct Known Subclasses

SymbolNameSelector

Instance Attribute Summary collapse

Attributes inherited from Selector

#token

Instance Method Summary collapse

Methods inherited from Selector

#resolve_enum

Constructor Details

#initialize(env, token, name) ⇒ NameSelector

Returns a new instance of NameSelector.


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# File 'lib/json_p3/selector.rb', line 37

def initialize(env, token, name)
  super(env, token)
  @name = name
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.


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

def name
  @name
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql? 


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# File 'lib/json_p3/selector.rb', line 58

def ==(other)
  self.class == other.class &&
    @name == other.name &&
    @token == other.token
end

#hash ⇒ Object 


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

def hash
  [@name, @token].hash
end

#resolve(node) ⇒ Object 


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# File 'lib/json_p3/selector.rb', line 42

def resolve(node)
  if node.value.is_a?(Hash) && node.value.key?(@name)
    [node.new_child(node.value[@name], @name)]
  else
    []
  end
end

#singular? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/json_p3/selector.rb', line 50

def singular?
  true
end

#to_s ⇒ Object 


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# File 'lib/json_p3/selector.rb', line 54

def to_s
  JSONP3.canonical_string(@name)
end