Class: Bag

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/ObjectModel/AnEntity/Bag.rb

Direct Known Subclasses

ChildrenBag, ReferencesBag

Instance Method Summary collapse

Constructor Details

#initialize(entity, attr_name, repository) ⇒ Bag

Returns a new instance of Bag.



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 4

def initialize entity, attr_name, repository    
  @entity, @entity_id, @attr_name, @repository = entity, entity.entity_id, attr_name, repository
  @array = []    
  @ivname = "@#{@attr_name}"
end

Instance Method Details

#<<(value) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 52

def << value    
  if tr = Thread.current[:om_transaction]
    tr.event_processor.fire_before @entity, new_item_method_name, @attr_name, value
    copy = tr.copy_get! @entity
    copy[@ivname].add value.entity_id
    tr.event_processor.fire_after @entity, new_item_method_name, @attr_name, value
  else
    raise NoTransactionError
  end
end

#_array ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 10

def _array
  @array
end

#clear ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 63

def clear
  delete_if{true}
end

#delete(value) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 14

def delete value  
  if tr = Thread.current[:om_transaction]
    return unless value.is_a? Entity            
    copy = tr.copy_get! @entity
    previous = false
    copy[@ivname].delete_if do |entity_id| 
      if previous
        tr.event_processor.fire_after @entity, delete_item_method_name, @attr_name, value
        previous = false
      end
      
      if value.entity_id == entity_id
        tr.event_processor.fire_before @entity, delete_item_method_name, @attr_name, value
        previous = true
        true
      else
        false
      end
    end     
    
    tr.event_processor.fire_after @entity, delete_item_method_name, @attr_name, value if previous
  else
    raise NoTransactionError
  end
end

#delete_if(&b) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 67

def delete_if &b  
  if tr = Thread.current[:om_transaction]
    copy = tr.copy_get! @entity
    previous_entity = nil
    copy[@ivname].delete_if do |entity_id|                
      entity = tr.resolve(entity_id)
      
      if previous_entity != nil
        tr.event_processor.fire_after @entity, delete_item_method_name, @attr_name, previous_entity
        previous_entity = entity
      end
      
      if b.call entity
        tr.event_processor.fire_before @entity, delete_item_method_name, @attr_name, entity
        previous = true
        true
      else
        false
      end
    end     
    
    if previous_entity != nil
      tr.event_processor.fire_after @entity, delete_item_method_name, @attr_name, previous_entity 
    end
  else
    raise NoTransactionError
  end    
end

#each(&b) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 96

def each &b
  tr = Thread.current[:om_transaction]
  if tr and tr.changed? @entity_id
      array = tr.copies[@entity_id][@ivname]     
      array.each{|entity_id| b.call tr.resolve(entity_id)}
  else
    @array.each{|entity_id| b.call @repository.by_id(entity_id)}
  end        
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 122

def empty?
  size == 0
end

#ids ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 106

def ids
  if tr = Thread.current[:om_transaction]
    if tr.changed? @entity_id
      tr.copies[@entity_id][@ivname]
    else
      @array
    end       
  else
    @array
  end    
end

#inspect ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 126

def inspect
  to_s
end

#size ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 40

def size
  if tr = Thread.current[:om_transaction]
    if tr.changed? @entity_id
      tr.copies[@entity_id][@ivname].size
    else
      @array.size
    end     
  else
    @array.size
  end
end

#to_s ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/Bag.rb', line 118

def to_s
  "#<Bag '#{@entity_id}': [#{@array.join(', ')}]>"
end