Class: Store

Inherits:
Object
  • Object
show all
Defined in:
lib/store.rb,
lib/store/ref.rb,
lib/store/repo.rb,
lib/store/query.rb,
lib/store/version.rb,
lib/store/data_mapper.rb,
lib/store/entity_mapper.rb

Defined Under Namespace

Classes: DataMapper, EntityMapper, Query, Ref, Repo

Constant Summary collapse

VERSION = 
"0.0.9"

Instance Method Summary collapse

Constructor Details

#initialize(entity_classes, data_mapping, entity_mapping) ⇒ Store

Returns a new instance of Store.



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# File 'lib/store.rb', line 9

def initialize(entity_classes, data_mapping, entity_mapping)
  @entity_classes         = entity_classes
  @resolver_data_mapper   = Resolver::DataMapper.new(data_mapping)
  @resolver_entity_mapper = Resolver::EntityMapper.new(self, entity_mapping)
  @entity_references      = EntityReferences.new
end

Instance Method Details

#build(entity_class_name, attributes = {}) ⇒ Object 



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# File 'lib/store.rb', line 16

def build(entity_class_name, attributes = {})
  entity = @entity_classes[entity_class_name].new

  attributes.each do |attribute, value|
    entity.public_send :"#{attribute}=", value
  end

  entity
end

#bulk_load(refs) ⇒ Object 



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# File 'lib/store.rb', line 90

def bulk_load(refs)
  data_mapper = data_mapper(refs.first)
  entity_class = @entity_classes[refs.first.entity_type]

  references = refs.map(&:reference)
  mapped_entities = data_mapper.bulk_find(references)

  entities = []

  references.each_with_index do |reference, i|
    mapped_entity = mapped_entities[i]

    entity = entity_mapper(refs.first).unmap(entity_class, mapped_entity)
    save_entity_reference reference, entity
    entities << entity
  end

  entities
end

#load(refs) ⇒ Object 



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# File 'lib/store.rb', line 62

def load(refs)
  if refs.kind_of? Array
    bulk_load refs
  else
    single_load refs
  end
end

#query(query) ⇒ Object 



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# File 'lib/store.rb', line 47

def query(query)
  data_mapper = data_mapper(query)
  entity_class = @entity_classes[query.entity]

  raise_unless_data_mapper_found(query, data_mapper)

  mapped_entities_with_references = data_mapper.select(query) || {}

  mapped_entities_with_references.map do |reference, mapped_entity|
    entity = entity_mapper(query).unmap(entity_class, mapped_entity)
    save_entity_reference reference, entity
    entity
  end
end

#reference(entity) ⇒ Object 



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# File 'lib/store.rb', line 110

def reference(entity)
  reference = find_entity_reference(entity)
  raise "Unknown entity #{entity.inspect}" unless reference
  build_reference entity, reference if reference
end

#reload(entity) ⇒ Object 



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# File 'lib/store.rb', line 70

def reload(entity)
  reference = find_entity_reference(entity)
  raise "Unknown entity #{entity.inspect}" unless reference
  ref = Store::Ref.new(extract_entity_class_name(entity), reference)
  single_load(ref)
end

#remove(entity) ⇒ Object 



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# File 'lib/store.rb', line 37

def remove(entity)
  data_mapper = data_mapper(entity)
  raise_unless_data_mapper_found(entity, data_mapper)

  reference = find_entity_reference(entity)
  data_mapper.delete(reference)

  remove_entity_reference entity
end

#save(entities) ⇒ Object 



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# File 'lib/store.rb', line 26

def save(entities)
  if entities.kind_of? Array
    entities.map do |entity|
      save_entity(entity)
    end
  else
    entity = entities
    save_entity(entity)
  end
end

#single_load(ref) ⇒ Object 



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# File 'lib/store.rb', line 77

def single_load(ref)
  data_mapper = data_mapper(ref)
  entity_class = @entity_classes[ref.entity_type]
  reference = ref.reference

  mapped_entity = data_mapper.single_find(reference)
  raise "Entity not found for reference #{ref.inspect}" unless mapped_entity

  entity = entity_mapper(ref).unmap(entity_class, mapped_entity)
  save_entity_reference reference, entity
  entity
end