Class: LWAC::Resource

Inherits:
Object
  • Object
show all
Defined in:
lib/lwac/export/resources.rb

Overview

This is similar to ruby’s Struct system, in that it creates an object based on the input parameters, with the exception that it can be efficiently and recursively described.

Instance Method Summary collapse

Constructor Details

#initialize(name, params = {}) ⇒ Resource

Construct a resource from a hash of parameters and a name.



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# File 'lib/lwac/export/resources.rb', line 21

def initialize(name, params = {})
  @params = []
  params.each{ |p, v|
    if(p) then
      # Parse param
      param   = sanitise_paramname(p)
      raise "Duplicate parameters for resource #{name}: #{param}." if @params.include? param
      val     = (v.is_a? Hash) ? Resource.new(param, v) : v

      eval("@#{param} = val")
      self.class.__send__(:attr_accessor, param)
      @params << param
    end
  }
  @name     = name
end

Instance Method Details

#__name ⇒ Object

Expose name to people who may wish to iterate over them



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# File 'lib/lwac/export/resources.rb', line 68

def __name
  @name
end

#__params ⇒ Object

Expose parameters to people who may wish to iterate over them



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# File 'lib/lwac/export/resources.rb', line 63

def __params
  @params
end

#describe(trunc = [17, 50], indent = 0, notitle = false) ⇒ Object

Describe this resource in a nice terminal-friendly way

* trunc --- how to truncate the keys[0] and values[1]
* indent --- base indent
* notitle --- Don't output a header



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# File 'lib/lwac/export/resources.rb', line 42

def describe(trunc = [17, 50], indent=0, notitle=false)
  str = "{\n"
  str = "#{" "*indent}#{@name}#{str}" if not notitle
  @params.each{|p|
    # Load the value
    val = eval("@#{p}")

    # Output the string
    str += "#{" "*indent}  #{p.truncate(trunc[0])}: "
    if val.is_a? Resource
      str += "#{val.describe(trunc, indent + 2, true)}" 
    else
      str += "#{val.to_s.truncate(trunc[1]).gsub("\n", '\n').gsub("\r", '\r').gsub("\t", '\t')}"
    end
    str += "\n"
  }
  str += "#{" "*indent}}"
  return str
end