Class: FXF::Parser

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

Overview

‘FXF::Parser` isn’t intended to be used directly. FXF.parse creates a ‘FXF::Parser` and calls its `parse` method.

Defined Under Namespace

Classes: ObjectHolder

Instance Method Summary collapse

Constructor Details

#initialize(raw) ⇒ Parser

initialize



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# File 'lib/fxf.rb', line 223

def initialize(raw)
	@raw = raw
end

Instance Method Details

#build_array(dfn, arr) ⇒ Object

build_array



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# File 'lib/fxf.rb', line 423

def build_array(dfn, arr)
	# loop through elements
	dfn.each do |ref|
		arr.push build_object(ref)
	end
	
	# return
	return arr
end

#build_hash(dfn, hsh) ⇒ Object

build_hash



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# File 'lib/fxf.rb', line 406

def build_hash(dfn, hsh)
	# loop through elements
	dfn.each do |key, ref|
		hsh[key] = build_object(ref)
	end
	
	# return
	return hsh
end

#build_object(key) ⇒ Object

build_object



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# File 'lib/fxf.rb', line 351

def build_object(key)
	# $tm.hrm
	rv = nil
	
	# if already found
	if @found.has_key?(key)
		return @found[key]
	end
	
	# get object definition
	dfn = @org.delete(key)
	
	# scalar
	if FXF::SCALARS.include?(dfn.class)
		@found[key] = dfn
		return dfn
		
	# array
	elsif dfn.is_a?(Array)
		# if object description
		if dfn[0].is_a?(Hash)
			details = {}
			build_hash(dfn[0]['details'], details)
			dfn = FXF::Parser::ObjectHolder.new dfn[0]['scope'], dfn[0]['class'], details
			@found[key] = dfn
			return dfn
		else
			@found[key] = []
			@collections.push @found[key]
			return build_array(dfn, @found[key])
		end
		
	# hash
	elsif dfn.is_a?(Hash)
		@found[key] = {}
		@collections.push @found[key]
		return build_hash(dfn, @found[key])
		
	# else unknown
	else
		puts 'unknown: ' + dfn.class.to_s
		exit
	end
	
	# return
	return rv
end

#parse ⇒ Object

parse



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# File 'lib/fxf.rb', line 234

def parse()
	@full = JSON.parse(@raw)
	@org = @full['objects']
	@found = {}
	@collections = []
	rv = self.build_object(@full['root'])
	
	# look for object place holders
	placeholder_mod()
	
	# return
	return rv
end

#placeholder_add(placeholders, el) ⇒ Object

placeholder_add



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# File 'lib/fxf.rb', line 335

def placeholder_add(placeholders, el)
	# $tm.hrm
	
	# if placeholder, and not in placeholders array, add to array
	if el.is_a?(FXF::Parser::ObjectHolder) and (not placeholders.include?(el))
		placeholders.push el
	end
end

#placeholder_mod ⇒ Object

placeholder_mod



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# File 'lib/fxf.rb', line 255

def placeholder_mod
	# $tm.hrm
	placeholders = []
	phs_to_obj = {}
	
	# build unique list of placeholders
	@collections.each do |collection|
		if collection.is_a?(Array)
			collection.each do |el|
				placeholder_add placeholders, el
			end
		elsif collection.is_a?(Hash)
			collection.values.each do |el|
				placeholder_add placeholders, el
			end
		end
	end
	
	# build a hash of placeholders to objects
	placeholders.each do |ph|
		# standard
		if ph.scope == 'standard'
			if translator = FXF::Standard::FROM_FXF[ph.clss]
				phs_to_obj[ph] = translator.call(ph)
			else
				raise 'do-not-have-standard-translator: ' + ph.clss
			end
		
		# custom
		elsif ph.scope == 'custom'
			if Module.const_defined?(ph.clss)
				clss = Module.const_get(ph.clss)
				
				if clss.respond_to?('from_fxf')
					phs_to_obj[ph] = clss.from_fxf(ph.details)
				else
					raise 'class-does-not-have-from-fxf: ' + ph.clss
				end
			else
				raise 'unknown-custom-class: ' + ph.clss
			end
		
		# else don't know how to build this object
		else
			phs_to_obj[ph] = ph
		end
	end
	
	# substitute placeholders to objects
	@collections.each do |collection|
		if collection.is_a?(Array)
			collection.map! do |el|
				rv = nil
				
				if phs_to_obj.has_key?(el)
					rv = phs_to_obj[el]
				else
					rv = el
				end
				
				rv
			end
		
		elsif collection.is_a?(Hash)
			collection.each do |k, v|
				if phs_to_obj.has_key?(v)
					collection[k] = phs_to_obj[v]
				end
			end
		end
	end
end