# See the License for the specific language governing permissions and
# limitations under the License.
-# Phase generating methods to
+# Phase generating methods to serialize Nit objects to different formats
module serialization_phase
import phase
end
generate_serialization_method(nclassdef)
+
+ generate_deserialization_init(nclassdef)
+ end
+
+ redef fun process_nmodule(nmodule)
+ do
+ # collect all classes
+ var auto_serializable_nclassdefs = new Array[AStdClassdef]
+ for nclassdef in nmodule.n_classdefs do
+ if nclassdef isa AStdClassdef and
+ not nclassdef.collect_annotations_by_name("auto_serializable").is_empty then
+ auto_serializable_nclassdefs.add nclassdef
+ end
+ end
+
+ if not auto_serializable_nclassdefs.is_empty then
+ generate_deserialization_method(nmodule, auto_serializable_nclassdefs)
+ end
end
private fun generate_serialization_method(nclassdef: AClassdef)
# Create method Node and add it to the AST
npropdefs.push(toolcontext.parse_propdef(code.join("\n")))
end
+
+ # Add a constructor to the automated nclassdef
+ private fun generate_deserialization_init(nclassdef: AClassdef)
+ do
+ var npropdefs = nclassdef.n_propdefs
+
+ var code = new Array[String]
+ code.add "init from_deserializer(v: Deserializer)"
+ code.add "do"
+ code.add " v.notify_of_creation self"
+
+ for attribute in npropdefs do if attribute isa AAttrPropdef then
+ if attribute.n_type == null then
+ toolcontext.error(attribute.location, "NOT YET IMPLEMENTED: all attributes of an auto_serialized class definition must define a type.")
+ continue
+ end
+ var name = attribute.name
+ var type_name = attribute.type_name
+ code.add ""
+ code.add "\tvar {name} = v.deserialize_attribute(\"{name}\")"
+ code.add "\tassert {name} isa {type_name} else print \"Expected attribute '{name}' to be of type '{type_name}'\""
+ code.add "\tself.{name} = {name}"
+ end
+
+ code.add "end"
+ npropdefs.add(toolcontext.parse_propdef(code.join("\n")))
+ end
+
+ # Added to the abstract serialization service
+ private fun generate_deserialization_method(nmodule: AModule, nclassdefs: Array[AStdClassdef])
+ do
+ var code = new Array[String]
+
+ var deserializer_nclassdef = nmodule.deserializer_nclassdef
+ var deserializer_npropdef
+ if deserializer_nclassdef == null then
+ # create the class
+ code.add "redef class Deserializer"
+ deserializer_npropdef = null
+ else
+ deserializer_npropdef = deserializer_nclassdef.deserializer_npropdef
+ end
+
+ if deserializer_npropdef == null then
+ # create the property
+ code.add " redef fun deserialize_class(name)"
+ code.add " do"
+ else
+ toolcontext.error(deserializer_npropdef.location, "Annotation error: you cannont define Deserializer::deserialize_class in a module where you use \"auto_serializable\".")
+ return
+ end
+
+ for nclassdef in nclassdefs do
+ var name = nclassdef.n_id.text
+ if not name.chars.has('[') then # FIXME this is a temporary hack
+ code.add " if name == \"{name}\" then return new {name}.from_deserializer(self)"
+ end
+ end
+
+ code.add " return super"
+ code.add " end"
+
+ if deserializer_nclassdef == null then
+ code.add "end"
+ nmodule.n_classdefs.add toolcontext.parse_classdef(code.join("\n"))
+ else
+ deserializer_nclassdef.n_propdefs.add(toolcontext.parse_propdef(code.join("\n")))
+ end
+ end
end
redef class AAttrPropdef
do
var name = n_type.n_id.text
+ if n_type.n_kwnullable != null then name = "nullable {name}"
+
var types = n_type.n_types
if not types.is_empty then
var params = new Array[String]
else return name
end
end
+
+redef class AModule
+ private fun deserializer_nclassdef: nullable AStdClassdef
+ do
+ for nclassdef in n_classdefs do
+ if nclassdef isa AStdClassdef and nclassdef.n_id.text == "Deserialization" then
+ return nclassdef
+ end
+ end
+
+ return null
+ end
+end
+
+redef class AStdClassdef
+ private fun deserializer_npropdef: nullable AMethPropdef
+ do
+ for npropdef in n_propdefs do if npropdef isa AMethPropdef then
+ var id = npropdef.n_methid
+ if id isa AIdMethid and id.n_id.text == "deserialize_class" then
+ return npropdef
+ end
+ end
+
+ return null
+ end
+end