Class: Tequila::Node

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

Defined Under Namespace

Classes: Attribute, CodeBlock, ImpreciseAttributesDeclarationError, Method, NoAttributeError, Static

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, type, bounded = false) ⇒ Node

#
main class             #
#


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# File 'lib/tree.rb', line 197

def initialize(name, type, bounded = false)
  @name = name
  @label = @name.gsub(/[@\$]/,'')
  @type = type
  @methods = []
  @attributes = { :only => [], :except => []}
  @code_blocks = []
  @statics = []
  @suppress_label = false
end

Instance Attribute Details

#attributes ⇒ Object

Returns the value of attribute attributes.



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# File 'lib/tree.rb', line 115

def attributes
  @attributes
end

#code_blocks ⇒ Object

Returns the value of attribute code_blocks.



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# File 'lib/tree.rb', line 116

def code_blocks
  @code_blocks
end

#content ⇒ Object (readonly)

Returns the value of attribute content.



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# File 'lib/tree.rb', line 121

def content
  @content
end

#drop_all ⇒ Object (readonly)

Returns the value of attribute drop_all.



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# File 'lib/tree.rb', line 126

def drop_all
  @drop_all
end

#label ⇒ Object

Returns the value of attribute label.



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# File 'lib/tree.rb', line 117

def label
  @label
end

#methods ⇒ Object

Returns the value of attribute methods.



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# File 'lib/tree.rb', line 114

def methods
  @methods
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/tree.rb', line 120

def name
  @name
end

#pick_all ⇒ Object (readonly)

it is used for attributes if ‘all’ keyword was specified



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# File 'lib/tree.rb', line 125

def pick_all
  @pick_all
end

#statics ⇒ Object

Returns the value of attribute statics.



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# File 'lib/tree.rb', line 119

def statics
  @statics
end

#suppress_label ⇒ Object

Returns the value of attribute suppress_label.



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# File 'lib/tree.rb', line 118

def suppress_label
  @suppress_label
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/tree.rb', line 122

def type
  @type
end

Instance Method Details

#add_attribute(key, attr) ⇒ Object

Raises:



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# File 'lib/tree.rb', line 272

def add_attribute(key, attr)
  raise ImpreciseAttributesDeclarationError if (pick_all || drop_all)
  unless @attributes[key].include?(attr)
    @attributes[key] << attr
  end
end

#all_attributes! ⇒ Object 



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# File 'lib/tree.rb', line 287

def all_attributes!
  if drop_all
    raise ImpreciseAttributesDeclarationError, "declaration conflict"
  else
    @pick_all = true
  end
end

#apply(context) ⇒ Object 



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# File 'lib/tree.rb', line 218

def apply(context)
  mapping = {}
  if context.respond_to?(:attributes) && !drop_all

    if (pick_all || drop_all)
      unless attributes[:only].empty? && attributes[:except].empty?
        raise ImpreciseAttributesDeclarationError, "declaration conflict"
      end
    end

    context_attributes = context.attributes
    #p "All: #{context_attributes.keys.inspect}"
    if attributes[:only].size > 0
      chosen_attributes = attributes[:only].map(&:name)
      #p "Chosen: #{chosen_attributes}"
      unless (foreign_attributes = (chosen_attributes.to_set - context_attributes.keys.to_set)).empty?
        raise NoAttributeError, "can't find attributes: #{foreign_attributes.to_a.join(', ')}"
      end
      attributes[:only].inject({}) do |res, att|
        res[att.label] = context_attributes[att.name]
        res
      end
    elsif attributes[:except].size > 0

      ignored_attributes = attributes[:except].map(&:name)
      #p "Ignored: #{ignored_attributes.inspect}"
      unless (foreign_attributes = (ignored_attributes.to_set - context_attributes.keys.to_set)).empty?
        raise NoAttributeError, "can't find attributes: #{foreign_attributes.to_a.join(', ')}"
      end
      context_attributes.delete_if { |att_name, _| ignored_attributes.include?(att_name) }
    else
      # use all variables by default if they are supported
      context_attributes
    end
  else
    {}
  end.merge(
    (methods || []).inject({}) do |res, m|
      res[m.label] = context.send(m.name.intern, *(m.params.map {|p| context.instance_eval p}))
      res
    end
  ).merge(
    code_blocks.inject({}) do |res, cb|
      res[cb.label] = context.instance_eval cb.code
      res
    end
  ).merge(
    statics.inject({}) do |res, s|
      res[s.label] = s.value
      res
    end
  )
end

#bounded? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tree.rb', line 295

def bounded?
  :bounded == type
end

#eval(vars) ⇒ Object 



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# File 'lib/tree.rb', line 208

def eval(vars)
  @content = case type
  when :variable
    lambda { Kernel.eval name, vars }
  when :association, :bounded
    lambda { |context| context.send(name.intern)}
  end
  self
end

#no_attributes! ⇒ Object 



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# File 'lib/tree.rb', line 279

def no_attributes!
  if pick_all
    raise ImpreciseAttributesDeclarationError, "declaration conflict"
  else
    @drop_all = true
  end
end

#to_s ⇒ Object 



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# File 'lib/tree.rb', line 299

def to_s
  "Node: " <<
    ((name == label) ? name : "#{name}(#{label})") <<
    (methods.empty? ? ' ' : " Methods: #{methods.map(&:to_s).join(',')} ")  <<
    (if attributes[:except].size > 0
      "Except: #{attributes[:except].to_s}"
    elsif attributes[:only].size > 0
      "Only: #{attributes[:only].to_s}"
    else
      ''
    end) <<
    ((code_blocks.size > 0) ? "Code blocks: \n" << code_blocks.map(&:to_s).join : '')
end