Class: Typed::Schema

Inherits:
Object
  • Object
show all
Defined in:
lib/typed/schema.rb

Constant Summary collapse

NotFound = 
Class.new(RuntimeError)

Instance Method Summary collapse

Constructor Details

#initialize(kvs) ⇒ Schema

Returns a new instance of Schema.



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# File 'lib/typed/schema.rb', line 5

def initialize(kvs)
  @kvs = kvs
  @types = {}
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/typed/schema.rb', line 14

def [](key)
  @types[key]
end

#[]=(key, val) ⇒ Object 



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# File 'lib/typed/schema.rb', line 18

def []=(key, val)
  # update schema if sub-class, otherwise raises
  val.must.struct(@types[key]) {
    raise TypeError, "%s is already typed as `%s'" % [key, @types[key].inspect]
  } if exist?(key)

  @types[key] = val
end

#check!(key, val) ⇒ Object 



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# File 'lib/typed/schema.rb', line 27

def check!(key, val)
  struct = @types[key] or
    raise Schema::NotFound, key.to_s

  if val.must.struct?(struct)
    return true 
  else
    expected = @types[key].inspect
    got      = Must::StructInfo.new(val).compact.inspect
    value    = val.inspect.truncate(200)
    raise TypeError, "%s(%s) got %s: %s" % [key, expected, got, value]
  end
end

#exist?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/typed/schema.rb', line 10

def exist?(key)
  @types.has_key?(key)
end