Class: SimplerDB::Item

Inherits:
Object
  • Object
show all
Defined in:
lib/simplerdb/db.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ Item

Returns a new instance of Item.



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# File 'lib/simplerdb/db.rb', line 18

def initialize(name)
  @name = name
  @attributes = Hash.new { |hash, key| hash[key] = [] }
end

Instance Attribute Details

#attributes ⇒ Object

Returns the value of attribute attributes.



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# File 'lib/simplerdb/db.rb', line 16

def attributes
  @attributes
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/simplerdb/db.rb', line 16

def name
  @name
end

Instance Method Details

#delete_attribute(attr) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 28

def delete_attribute(attr)
  if attr.value.nil?
    @attributes[attr.name].clear
  else
    @attributes[attr.name].delete(attr)
  end
  
  if @attributes[attr.name].size == 0
    @attributes.delete(attr.name)
  end
end

#get_attributes(attribute_name = nil) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 40

def get_attributes(attribute_name = nil)
  attrs = []
  
  @attributes.each do |key, value|
    if (attribute_name.nil? || attribute_name == key)
      attrs += value
    end
  end
  
  return attrs
end

#put_attribute(attr, replace = false) ⇒ Object 



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# File 'lib/simplerdb/db.rb', line 23

def put_attribute(attr, replace = false)
  @attributes[attr.name].clear if replace
  @attributes[attr.name] << attr 
end