Class: AttributeStruct

Inherits:
Object
  • Object
show all
Defined in:
lib/attribute_struct/version.rb,
lib/attribute_struct/attribute_hash.rb,
lib/attribute_struct/attribute_struct.rb

Defined Under Namespace

Classes: AttributeHash, Version

Constant Summary collapse

VERSION = 
Version.new('0.1.0')

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args, &block) ⇒ AttributeStruct

Returns a new instance of AttributeStruct.



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# File 'lib/attribute_struct/attribute_struct.rb', line 36

def initialize(*args, &block)
  self.class.load_the_hash
  @_camel_keys = self.class.camel_keys
  @table = __hashish.new
  unless(args.empty?)
    if(args.size == 1 && args.first.is_a?(Hash))
      _load(args.first)
    end
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args, &block) ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 64

def method_missing(sym, *args, &block)
  if((s = sym.to_s).end_with?('='))
    s.slice!(-1, s.length)
    sym = s
  end
  sym = _process_key(sym)
  @table[sym] ||= AttributeStruct.new
  if(!args.empty? || block)
    if(args.empty? && block)
      base = @table[sym]
      if(block.arity == 0)
        base.instance_exec(&block)
      else
        base.instance_exec(base, &block)
      end
      @table[sym] = base
    elsif(!args.empty? && block)
      base = @table[sym]
      base = self.class.new unless base.is_a?(self.class)
      @table[sym] = base
      leaf = base
      args.each do |arg|
        leaf = base[arg]
        unless(leaf.is_a?(self.class))
          leaf = self.class.new
          base._set(arg, leaf)
          base = leaf
        end
      end
      if(block.arity == 0)
        leaf.instance_exec(&block)
      else
        leaf.instance_exec(leaf, &block)
      end
    else
      @table[sym] = args.first
    end
  end
  @table[sym]
end

Class Attribute Details

.camel_keys ⇒ Object

Returns the value of attribute camel_keys.



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# File 'lib/attribute_struct/attribute_struct.rb', line 5

def camel_keys
  @camel_keys
end

.force_chef ⇒ Object

Returns the value of attribute force_chef.



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# File 'lib/attribute_struct/attribute_struct.rb', line 6

def force_chef
  @force_chef
end

Instance Attribute Details

#_camel_keys ⇒ Object

Returns the value of attribute _camel_keys.



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# File 'lib/attribute_struct/attribute_struct.rb', line 34

def _camel_keys
  @_camel_keys
end

Class Method Details

.load_the_camels ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 13

def load_the_camels
  unless(@camels_loaded)
    require 'attrubute_struct/monkey_camels'
    @camels_loaded = true
  end
end

.load_the_hash ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 20

def load_the_hash
  unless(@hash_loaded)
    if(defined?(Chef) || force_chef)
      require 'chef/mash'
      require 'chef/mixin/deep_merge'
    else
      require 'attribute_struct/attribute_hash'
    end
    @hash_loaded
  end
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 52

def [](key)
  _data[_process_key(key)]
end

#__hashish ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 154

def __hashish
  defined?(Mash) ? Mash : AttributeHash
end

#_data ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 113

def _data
  @table
end

#_dump ⇒ Object 



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

def _dump
  __hashish[
    *(@table.map{|key, value|
        [key, value.is_a?(self.class) ? value._dump : value]
      }.flatten(1))
  ]
end

#_keys ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 109

def _keys
  _data.keys
end

#_load(hashish) ⇒ Object 



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

def _load(hashish)
  @table.clear
  hashish.each do |key, value|
    if(value.is_a?(Hash))
      self._set(key)._load(value)
    else
      self._set(key, value)
    end
  end
  self
end

#_merge(target) ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 137

def _merge(target)
  source = deep_copy
  dest = target.deep_copy
  if(defined?(Mash))
    result = Chef::Mixin::DeepMerge.merge(source, dest)
  else
    result = source.deep_merge(dest)
  end
  AttributeStruct.new(result)
end

#_merge!(target) ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 148

def _merge!(target)
  result = _merge(target)._dump
  _load(result)
  self
end

#_process_key(key) ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 179

def _process_key(key)
  key = key.to_s
  if(_camel_keys && key._camel?)
    key.to_s.split('_').map do |part|
      "#{part[0,1].upcase}#{part[1,part.size]}"
    end.join.to_sym
  else
    if(_camel_keys)
      # Convert so Hash doesn't make a new one and lose the meta
      key = CamelString.new(key) unless key.is_a?(CamelString)
    end
    key
  end
end

#_set(key, val = nil, &block) ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 56

def _set(key, val=nil, &block)
  if(val)
    self.method_missing(key, val, &block)
  else
    self.method_missing(key, &block)
  end
end

#deep_copy(thing = nil) ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 166

def deep_copy(thing=nil)
  thing ||= _dump
  if(thing.is_a?(Enumerable))
    val = thing.map{|v| v.is_a?(Enumerable) ? deep_copy(v) : do_dup(v) }
  else
    val = do_dup(thing)
  end
  if(thing.is_a?(Hash))
    val = __hashish[*val.flatten(1)]
  end
  val
end

#do_dup(v) ⇒ Object 



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# File 'lib/attribute_struct/attribute_struct.rb', line 158

def do_dup(v)
  begin
    v.dup
  rescue
    v.is_a?(Symbol) ? v.to_s : v
  end
end

#nil? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/attribute_struct/attribute_struct.rb', line 105

def nil?
  _data.empty?
end