Class: Mantra::Manifest::Scope::ArrayScope

Inherits:
Mantra::Manifest::Scope show all
Defined in:
lib/mantra/manifest/scope/array_scope.rb

Defined Under Namespace

Classes: UnknownFunction

Constant Summary

Constants inherited from Mantra::Manifest::Scope

ARRAY_SELECTOR_REGEXP, HASH_SELECTOR_REGEXP

Instance Attribute Summary

Attributes inherited from Mantra::Manifest::Scope

#next, #scope

Instance Method Summary collapse

Methods inherited from Mantra::Manifest::Scope

#filter, #has_same_type?, #initialize, #last?, #match?, parse, parse_selector, raise_parse_error, split_selector, #to_a

Methods included from Helpers::RegexpHelper

#to_regexp

Methods included from Helpers::ObjectWithType

included

Constructor Details

This class inherits a constructor from Mantra::Manifest::Scope

Instance Method Details

#_filter(element) ⇒ Object

returns array of children that are



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# File 'lib/mantra/manifest/scope/array_scope.rb', line 10

def _filter(element)
  case scope
  when /^\d+$/
    index = scope.to_i
    [element.content[index]]
  when /^.+\=.+$/
    key_wildcard, value_wildcard = scope.split("=")
    key_matcher, value_matcher = to_regexp(key_wildcard), to_regexp(value_wildcard)
    element.content.select { |e| e.hash? }.select do |e|
      e.each_pair.any? do |pair|
        k, v = *pair
        k.match(key_matcher) && v.match(value_matcher)
      end
    end
  when /^\:\:.+$/
    function_name = self.scope[2..-1]
    if !allowed_function_names.include?(function_name)
      raise ScopeParseError.new("Unknown function: #{function_name}")
    end
    self.send(function_name, element)
  when ""
    element.content
  else
    raise ScopeParseError.new("Don't know how to apply scope to array " +
                              "(scope: #{self.scope.inspect}, array: #{element.to_ruby_object.inspect})")
  end
end

#allowed_function_names ⇒ Object 



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# File 'lib/mantra/manifest/scope/array_scope.rb', line 38

def allowed_function_names
  %w(last first)
end

#first(element) ⇒ Object 



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# File 'lib/mantra/manifest/scope/array_scope.rb', line 46

def first(element)
  [element.content.first]
end

#last(element) ⇒ Object 



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# File 'lib/mantra/manifest/scope/array_scope.rb', line 42

def last(element)
  [element.content.last]
end