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state.rb
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state.rb
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module DataMapper
module Resource
# the state of the resource (abstract)
class State
attr_reader :resource
def initialize(resource)
@resource = resource
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
def eql?(other)
instance_of?(other.class) &&
hash == other.hash
end
def ==(other)
self.class <=> other.class &&
hash == other.hash
end
def hash
resource.object_id.hash
end
private
def model
@model ||= resource.model
end
def properties
@properties ||= model.properties(repository.name)
end
def relationships
@relationships ||= model.relationships(repository.name).values
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 reset_original_attributes
original_attributes.clear
end
end # class State
end # module Resource
end # module DataMapper