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Contents
module DataMapper
module Resource
# the state of the resource (abstract)
class PersistenceState
extend Equalizer
equalize :resource
attr_reader :resource
def initialize(resource)
@resource = resource
@model = resource.model
end
def get(subject, *args)
subject.get(resource, *args)
end
def set(subject, value)
subject.set(resource, value)
self
end
def delete
raise NotImplementedError, "#{self.class}#delete should be implemented"
end
def commit
raise NotImplementedError, "#{self.class}#commit should be implemented"
end
def rollback
raise NotImplementedError, "#{self.class}#rollback should be implemented"
end
private
attr_reader :model
def properties
@properties ||= model.properties(repository.name)
end
def relationships
@relationships ||= model.relationships(repository.name)
end
def identity_map
@identity_map ||= repository.identity_map(model)
end
def remove_from_identity_map
identity_map.delete(resource.key)
end
def add_to_identity_map
identity_map[resource.key] = resource
end
def set_child_keys
relationships.each do |relationship|
set_child_key(relationship)
end
end
def set_child_key(relationship)
return unless relationship.loaded?(resource) && relationship.respond_to?(:resource_for)
set(relationship, get(relationship))
end
end # class PersistenceState
end # module Resource
end # module DataMapper
Version data entries
7 entries across 7 versions & 3 rubygems