Class: ContextRole

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

Overview

ContextRole is the class containing the context role definitions

Usage: ContextRole.add :logged_in_user, “!session.nil?”

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.roles ⇒ Object (readonly)

Hash containing all the context roles. Keys are the role names Values are the Ruby eval strings Eval strings must result in true or false



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# File 'lib/cbac/context_role.rb', line 8

def roles
  @roles
end

Class Method Details

.add(symbol, context_rule = "", &block) ⇒ Object

Adds a context role to the list of context roles. @symbol defines the name of the context role @context_rule defines the ruby code to be evaluated when determining role membership

If the context role already exists, an exception is thrown.

Raises:

  • (ArgumentError) 


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# File 'lib/cbac/context_role.rb', line 15

def add(symbol, context_rule = "", &block)
  symbol = symbol.to_sym
  @roles = Hash.new if @roles.nil?
  raise ArgumentError, "CBAC: ContextRole was already defined:" + symbol.to_s if @roles.keys.include?(symbol)
  # TODO following code
  #raise ArgumentError, "CBAC: cannot specify both string rule and block rule" unless context_rule.nil? and block.nil?
  # TODO context parameter in block statement is not explicitly tested
  block = eval("Proc.new {|context| " + context_rule + "}") if block.nil?
  @roles[symbol] = block
end