Class: Notator::JavascriptObjectNotation

Inherits:
BlankSlate show all
Defined in:
lib/notator/javascript_object_notation.rb

Overview

Instance Method Summary collapse

Methods inherited from BlankSlate

find_hidden_method, hide, reveal

Constructor Details

#initialize(options = {}) ⇒ JavascriptObjectNotation 



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# File 'lib/notator/javascript_object_notation.rb', line 12

def initialize( options = {} )
#-------------------------------
  
  @pretty = options[ :pretty ] || false;

  @context_stack = [];
  @context_stack.push( Hash.new )

end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(key, *args, &block) ⇒ Object 



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# File 'lib/notator/javascript_object_notation.rb', line 87

def method_missing( key, *args, &block )
#---------------------------------------

  raise 'A key-value pair cannot be added in the context of an array.' \
    if @context_stack.last.is_a?( Array )
  
  if block.nil?
    @context_stack.last[ key ] = args.first
  else
    hash = Hash.new
    @context_stack.last[ key ] = hash
    @context_stack.push( hash )
    block.call( self )
    @context_stack.pop
  end

end

Instance Method Details

#<<(json) ⇒ Object 



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# File 'lib/notator/javascript_object_notation.rb', line 105

def <<( json )
#-------------
  
  hash = JSON[ json ]
  
  @context_stack.last.is_a?( Array ) ?
    @context_stack.last.push( hash ) :
    @context_stack.last.merge!( hash )
                 
end

#array!(key = nil, *args, &block) ⇒ Object 



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# File 'lib/notator/javascript_object_notation.rb', line 29

def array!( key = nil, *args, &block )
#-------------------------------------

  if block.nil?
    
    raise 'Thearray! method requires an array argument.' \
      unless args.first.is_a?( Array )
        
    @context_stack.last[ key ] = args.first
  
  else
    
    array = Array.new
    
    if @context_stack.last.is_a?( Hash )

      raise 'The array! method requires a key in the context of a hash.' \
        if key.nil?

      @context_stack.last[ key ] = array
      
    else  
        
      @context_stack.last.push( array );
      
    end
    
    @context_stack.push( array )
    block.call( self )
    @context_stack.pop
  
  end

end

#hash!(key, *args, &block) ⇒ Object Also known as: tag! 



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# File 'lib/notator/javascript_object_notation.rb', line 22

def hash!( key, *args, &block )
#------------------------------
  method_missing( key.to_sym, *args, &block )
end

#to_json ⇒ Object 



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# File 'lib/notator/javascript_object_notation.rb', line 116

def to_json
#----------
  @pretty ? 
    JSON.pretty_generate( @context_stack.first ) :
    @context_stack.first.to_json
end

#value!(value = nil, &block) ⇒ Object 



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# File 'lib/notator/javascript_object_notation.rb', line 64

def value!( value = nil, &block )
#--------------------------------

  raise 'The value! method can only be called in the context of ' + 
        'an array.' \
    unless @context_stack.last.is_a?( Array )

  if block.nil?
        
    @context_stack.last.push( value )
          
  else
                
    hash = Hash.new
    @context_stack.last.push( hash )
    @context_stack.push( hash )
    block.call( self )
    @context_stack.pop
  
  end

end