Class: EntityType

Inherits:
Object
  • Object
show all
Defined in:
lib/ObjectModel/AnEntity/EntityType.rb

Class Method Summary collapse

Class Method Details

.create_copy(e) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 42

def create_copy e
	e.entity_id.should_not! :be_nil
	
	c = EntityCopy.new
	c.om_version, c.entity_id, c.name = e.om_version, e.entity_id, e.name
	c.parent = e.instance_variable_get "@parent"
	c.updated!						
	
	# Attributes
	e.meta.attributes.each do |n, m|
		m.type.initialize_copy m, e, c
	end
	
	# Children
	e.meta.children.each do |n, m|
		m.type.initialize_copy m, e, c
	end
	
	# References
	e.meta.references.each do |n, m|
		m.type.initialize_copy m, e, c
	end			
	
	BackReferences.initialize_copy e, c						
	
	return c
end

.custom_initialization(e, outdated = nil) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 278

def custom_initialization e, outdated = nil
	e.meta.attributes.each do |n, m|
		next if m.initialize == NotDefined or (outdated and !outdated.include?(n))
		value = if m.initialize.is_a? Proc
			e.instance_eval &m.initialize
		else
			m.initialize
		end
		e.send m.name.to_writer, value 
	end
end

.delete(e, storage) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 252

def delete e, storage
	entity_id = e.entity_id
	
	# Entity
	storage[:entities].filter(:entity_id => entity_id).delete 
	storage[:entities_content].filter(:entity_id => entity_id).delete
	
	# Attributes			
	e.meta.attributes.each do |n, m|			
		m.type.respond_to :delete, e, m, storage										
	end						
	
	# Children
	e.meta.children.each do |n, m|
		m.type.respond_to :delete, e, m, storage											
	end
	
	# References
	e.meta.references.each do |n, m|
		m.type.respond_to :delete, e, m, storage												
	end
	
	# BackReferences
	BackReferences.delete e, storage
end

.delete_all_children(e) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 328

def delete_all_children e						
	e.meta.children.each do |n, m|	
		m.type.delete_all_children e, m
	end
end

.delete_all_references_to(tr, e) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 334

def delete_all_references_to tr, e
	c = tr.copies[e.entity_id]
	processed = Set.new
	BackReferences.delete_all_references_to e, c do |referrer_entity_id|
		next if processed.include? referrer_entity_id
		processed << referrer_entity_id
		
		referrer = tr.resolve referrer_entity_id
		referrer.meta.references.each do |n, m|
			m.type.delete_all_references_to referrer, e, m
		end
	end
end

.delete_backreference(transaction, entity, reference) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 356

def delete_backreference transaction, entity, reference
	reference_copy = transaction.copy_get! reference
	BackReferences.delete_backreference entity, reference, reference_copy
end

.delete_from_parent(e, parent) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 348

def delete_from_parent e, parent		
	e.should! :be_a, Entity
	parent.should! :be_a, Entity
	parent.meta.children.each do |n, m|
		m.type.delete_from_parent e, parent, m
	end
end

.dump_id(id) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 390

def dump_id id			
	if id == nil 
		"nil" 
	else
		id.should! :be_a, String
		id
	end
end

.dump_id!(id) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 404

def dump_id! id
	[dump_id(id), "ENTITY_ID"]
end

.each_attribute(e, &b) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 366

def each_attribute e, &b
	e.meta.attributes.each{|n, m| b.call e.send(n)}
end

.each_child(e, &b) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 370

def each_child e, &b
	e.meta.children.each{|n, m| m.type.each e, m, &b}
end

.each_entity_in_repository(repository, &b) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 378

def each_entity_in_repository repository, &b
	repository.storage[:entities].each do |row|
		e = repository.by_id row[:entity_id]
		b.call e
	end
end

.each_reference(e, &b) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 374

def each_reference e, &b
	e.meta.references.each{|n, m| m.type.each e, m, &b}
end

.initialize_new_entity(e, eid, entity_id, tr) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 70

def initialize_new_entity e, eid, entity_id, tr
	new_entity_id = if entity_id
		entity_id.should! :be_a, String
		#				path_index = tr.repository._index_manager.get_index_without_transaction_check(:path)
		#				path_index.get_entity_id(entity_id).should! :be_nil								
		raise_without_self "Not Unique :entity_id ('#{entity_id}')!", ObjectModel if storage_include? entity_id, tr.repository.storage
		
		tr.copies.should_not! :include, entity_id
		entity_id
	else
		tr.repository.storage.generate(:entity_id)
	end
	
	unless eid
		eid = "eid_" + tr.repository.storage.generate(:name)
	end
	
	e.instance_variable_set "@entity_id", new_entity_id						
	e.instance_variable_set "@om_repository", tr.repository
	e.instance_variable_set "@om_version", 0
	
	# Attributes
	e.meta.attributes.each do |n, m|				
		value = m.type.initial_value m, e
		e.instance_variable_set m.ivname, value
	end
	
	# Children
	e.meta.children.each do |n, m|
		value = m.type.initial_value m, e
		e.instance_variable_set m.ivname, value
	end
	
	# References
	e.meta.references.each do |n, m|
		value = m.type.initial_value m, e
		e.instance_variable_set m.ivname, value
	end						
	
	BackReferences.initialize_entity e
	
	tr.event_processor.fire_before e, :new
	
	e.name = eid # after :new
end

.initialize_storage(db) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 5

def initialize_storage db			
	db.create_table :entities do
		column :entity_id, :text
		column :name, :text
		column :class, :text
		
		column :om_version, :text				
		column :parent_id, :text
		
		primary_key :entity_id
#				index :entity_id
	end
	
	db.create_table :entities_content do
		column :entity_id, :text
		
		column :name, :text
		
		column :value, :text				
		column :class, :text
		
		primary_key :entity_id, :attr_name, :key
#				index :entity_id
	end						
end

.load(entity_id, repository, storage) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 116

def load entity_id, repository, storage
	entity_id.should! :be_a, String
	row = storage[:entities][:entity_id => entity_id]
	unless row
		raise NotFoundError, "Entity with entity_id '#{entity_id}' not found!"
		#				raise_without_self NotFoundError, "Entity with Path '#{path}' not found!", ObjectModel 
	end
	
	# Entity
	klass_name = row[:class]
	begin
		klass = eval klass_name, TOPLEVEL_BINDING, __FILE__, __LINE__
		e = klass.new nil, nil, "original_new"
		e.should! :be_a, Entity
	rescue NameError => err
		log.error "Can't find '#{klass}' Class for '#{entity_id}' Entity!"
		raise LoadError.new(err)
	end		
	
	e.instance_variable_set "@entity_id", entity_id
	e.instance_variable_set "@name", row[:name].should_not!(:be_nil).should_not!(:be_empty)
	e.instance_variable_set "@om_version", row[:om_version].should_not!(:be_nil).to_i
	e.instance_variable_set "@parent", load_id(row[:parent_id].should_not!(:be_nil))
	e.instance_variable_set "@om_repository", repository
	
	outdated = []
	
	# Attributes
	e.meta.attributes.each do |n, m|
		value = begin
			m.type.load m, e, storage						
		rescue LoadError
			outdated << n
			log.warn "Can't load '#{entity_id}.#{n}' Attribute, default value will be used!"
			value = m.type.initial_value m, e
			e.instance_variable_set m.ivname, value
		end
	end						
	
	# Children
	e.meta.children.each do |n, m|
		value = begin
			m.type.load m, e, storage					
		rescue LoadError
			log.warn "Can't load '#{entity_id}.#{n}' Child, default value will be used!"
			value = m.type.initial_value m, e
			e.instance_variable_set m.ivname, value
		end
	end
	
	# References
	e.meta.references.each do |n, m|
		value = begin
			m.type.load m, e, storage
		rescue LoadError
			log.warn "Can't load '#{entity_id}.#{n}' Reference, default value will be used!"					
			value = m.type.initial_value m, e
			e.instance_variable_set m.ivname, value
		end				
	end
	
	# BackReferences
	BackReferences.load e, storage			
	
	# Data Migration
	custom_initialization e, outdated if outdated.size > 0
	
	return e
end

.load_id(data) ⇒ Object

Raises:



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 385

def load_id data			
	raise LoadError if data == nil
	data == "nil" ? nil : data
end

.load_id!(data, klass) ⇒ Object

Raises:



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 399

def load_id! data, klass
	raise LoadError unless klass == "ENTITY_ID"
	load_id data
end

.new_backreference(transaction, entity, reference) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 361

def new_backreference transaction, entity, reference
	reference_copy = transaction.copy_get! reference
	BackReferences.new_backreference entity, reference, reference_copy
end

.persist(c, e, storage) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 218

def persist c, e, storage
	entity_id = e.entity_id
	
	# Entity
	entities = storage[:entities]
	entities.filter(:entity_id => entity_id).delete 
	entities.insert(
									:entity_id => entity_id.should!(:be_a, String).should_not!(:be_empty),
	:name => e.name.should!(:be_a, String).should_not!(:be_empty),
	:class => e.class.name,
	:om_version => c.om_version,
	:parent_id => AnEntity::EntityType.dump_id(c.parent)
	)
	storage[:entities_content].filter(:entity_id => entity_id).delete
	
	# Attributes			
	e.meta.attributes.each do |n, m|
		m.type.persist c, entity_id, m, storage										
	end						
	
	# Children
	e.meta.children.each do |n, m|
		m.type.persist c, entity_id, m, storage				
	end
	
	# References
	e.meta.references.each do |n, m|
		m.type.persist c, entity_id, m, storage				
	end
	
	# BackReferences
	BackReferences.persist c, entity_id, storage
end

.print_storage(db, name) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 31

def print_storage db, name
	if name == nil or name == :entities
		puts "\nEntities:"
		db[:entities].print
	end
	if name == nil or name == :entities_content
		puts "EntitiesContent:"
		db[:entities_content].print
	end
end

.storage_include?(entity_id, storage) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 186

def storage_include? entity_id, storage
	storage[:entities][:entity_id => entity_id] != nil
end

.validate_attribute(e, name, new, old) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 290

def validate_attribute e, name, new, old
	m = e.class.meta.attributes[name]
	
	unless m.type.validate_type new
		raise_without_self Errors::ValidationError, 
		"Invalid Value Type '#{new}' for Attribute '#{e.class.name}.#{name}'!", 
		ObjectModel
	end
	
	v = m.validate			
	if v != nil
		v.should! :be_a, Proc
		begin
			v.call new
		rescue RuntimeError => err
			raise Errors::ValidationError, err.message, err.backtrace
		end
		#				unless v.call new
		#					raise_without_self Errors::ValidationError, 
		#					"Invalid Value '#{new}' for Attribute '#{e.class.name}.#{name}'!", 
		#					ObjectModel
		#				end
	end									
end

.validate_entity(e) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 315

def validate_entity e
	begin
		e.class.meta.validation.validate e
	rescue RuntimeError => err
		raise Errors::ValidationError, err.message, err.backtrace
	end
	#			unless e.class.meta.validation.validate e
	#				raise_without_self Errors::ValidationError, 
	#				"Invalid Entity #{e}!",
	#				ObjectModel
	#			end
end

.write_back(c, e) ⇒ Object 



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# File 'lib/ObjectModel/AnEntity/EntityType.rb', line 190

def write_back c, e
	c.should! :be_a, EntityCopy
	
	# Entity
	c.om_version += 1
	e.instance_variable_set "@om_version", c.om_version
	e.instance_variable_set "@parent", c.parent
	e.instance_variable_set "@name", c.name
	
	# Attributes
	e.meta.attributes.each do |n, m|
		m.type.write_back c, e, m
	end						
	
	# Children
	e.meta.children.each do |n, m|
		m.type.write_back c, e, m				
	end
	
	# References
	e.meta.references.each do |n, m|
		m.type.write_back c, e, m				
	end
	
	# BackReferences			
	BackReferences.write_back c, e
end