Class: DataMapper::TypeMap

Attributes

Instance Attributes

chains [RW] public

Sets the attribute chains.

parent [RW] public

Sets the attribute parent.

Constructor Summary

public initialize(parent = nil, &blk)
[View source] 


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# File 'dm-core/lib/dm-core/type_map.rb', line 6

def initialize(parent = nil, &blk)
  @parent, @chains = parent, {}

  blk.call(self) unless blk.nil?
end

Public Visibility

Public Instance Method Summary

#lookup(type)
#lookup_by_type(type)
#lookup_from_map(type)
#lookup_from_parent(type)
#map(type)
#type_mapped?(type)

Public Instance Methods Inherited from Object

validatable?

Public Instance Method Details

lookup

public lookup(type)
[View source] 


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# File 'dm-core/lib/dm-core/type_map.rb', line 16

def lookup(type)
  if type_mapped?(type)



    lookup_from_map(type)
  else
    lookup_by_type(type)
  end
end

lookup_by_type

public lookup_by_type(type)

Meta Tags

Raises:

<DataMapper::TypeMap::Error>

if the type is not a default primitive or has a type map entry.

[View source] 


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# File 'dm-core/lib/dm-core/type_map.rb', line 37

def lookup_by_type(type)
  raise DataMapper::TypeMap::Error.new(type) unless type.respond_to?(:primitive) && !type.primitive.nil?

  lookup(type.primitive).merge(Type::PROPERTY_OPTIONS.inject({}) {|h, k| h[k] = type.send(k); h})
end

lookup_from_map

public lookup_from_map(type)
[View source] 


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# File 'dm-core/lib/dm-core/type_map.rb', line 24

def lookup_from_map(type)
  lookup_from_parent(type).merge(map(type).translate)
end

lookup_from_parent

public lookup_from_parent(type)
[View source] 


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# File 'dm-core/lib/dm-core/type_map.rb', line 28

def lookup_from_parent(type)
  if !@parent.nil? && @parent.type_mapped?(type)



    @parent[type]
  else
    {}
  end
end

map

public map(type)
[View source] 


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# File 'dm-core/lib/dm-core/type_map.rb', line 12

def map(type)
  @chains[type] ||= TypeChain.new
end

type_mapped?

public type_mapped?(type)
[View source] 


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# File 'dm-core/lib/dm-core/type_map.rb', line 45

def type_mapped?(type)
  @chains.has_key?(type) || (@parent.nil? ? false : @parent.type_mapped?(type))
end