Class: FakeDynamo::Attribute

Inherits:
Object
  • Object
show all
Defined in:
lib/fake_dynamo/attribute.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, value, type) ⇒ Attribute

Returns a new instance of Attribute.



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# File 'lib/fake_dynamo/attribute.rb', line 5

def initialize(name, value, type)
  @name, @value, @type = name, value, type

  if @type == 'B' and value
    @value = Base64.decode64(value)
  end

  if @type == 'BS'
    @value = value.map { |v| Base64.decode64(v) }
  end

  if ['NS', 'SS', 'BS'].include? @type
    raise ValidationException, 'An AttributeValue may not contain an empty set' if value.empty?
    raise ValidationException, 'Input collection contains duplicates' if value.uniq!
  end

  if ['NS', 'N'].include? @type
    Array(@value).each do |n|
      numeric(n)
    end
  end

  if ['S', 'SS', 'S', 'BS'].include? @type
    Array(value).each do |v|
      raise ValidationException, 'An AttributeValue may not contain an empty string or empty binary' if v == ''
    end
  end

  if name == ''
    raise ValidationException, 'Empty attribute name'
  end
end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/fake_dynamo/attribute.rb', line 3

def name
  @name
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/fake_dynamo/attribute.rb', line 3

def type
  @type
end

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/fake_dynamo/attribute.rb', line 3

def value
  @value
end

Class Method Details

.from_data(data) ⇒ Object 



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# File 'lib/fake_dynamo/attribute.rb', line 90

def from_data(data)
  Attribute.new(data['AttributeName'], nil, data['AttributeType'])
end

.from_hash(name, hash) ⇒ Object 



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# File 'lib/fake_dynamo/attribute.rb', line 94

def from_hash(name, hash)
  Attribute.new(name, hash.values.first, hash.keys.first)
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/fake_dynamo/attribute.rb', line 71

def <=>(other)
  if @type == 'N'
    @value.to_f <=> other.value.to_f
  else
    @value <=> other.value
  end
end

#==(attribute) ⇒ Object 



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# File 'lib/fake_dynamo/attribute.rb', line 65

def ==(attribute)
  @name == attribute.name &&
    @type == attribute.type &&
    (@type == 'N' ? @value.to_f == attribute.value.to_f : @value == attribute.value)
end

#as_hash ⇒ Object 



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# File 'lib/fake_dynamo/attribute.rb', line 53

def as_hash
  value = if @type == 'B'
            Base64.encode64(@value)
          elsif @type == 'BS'
            @value.map { |v| Base64.encode64(v) }
          else
            @value
          end

  { @name => { @type => value } }
end

#description ⇒ Object 



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# File 'lib/fake_dynamo/attribute.rb', line 46

def description
  {
    'AttributeName' => name,
    'AttributeType' => type
  }
end

#eql?(attribute) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fake_dynamo/attribute.rb', line 79

def eql?(attribute)
  return false unless attribute.kind_of? Attribute

  self == attribute
end

#hash ⇒ Object 



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# File 'lib/fake_dynamo/attribute.rb', line 85

def hash
  name.hash ^ (type == 'N' ? value.to_f : value).hash ^ type.hash
end

#numeric(n) ⇒ Object 



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# File 'lib/fake_dynamo/attribute.rb', line 38

def numeric(n)
  begin
    Float(n)
  rescue
    raise ValidationException, "The parameter cannot be converted to a numeric value: #{n}"
  end
end