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.custom_initialization(e, outdated = nil) ⇒ Object 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def custom_initialization e, outdated = nil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    next if m.initialize == NotDefined or (outdated and !outdated.include?(n))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 



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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