1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2014 Alexis Laferrière <alexis.laf@xymus.net>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # Serialization support compiler, a tool to support deserialization of live generic types
19 # Executing on the module `game_logic` will create the module `game_logic_serial`
20 # in the local directory. Mixing the generated module to the main module with
21 # `nitc game_logic.nit -m game_logic_serial` will create a program supporting
22 # deserialization of all generic types visible from the main module.
24 # Because the generation is limited to the visible types, a module author might want
25 # generate and include its own serialization support module.
29 import rapid_type_analysis
34 # TODO add more features and move to lib
38 var header
: nullable Writable = null
43 # Imports from this module
44 var imports
= new Array[Writable]
46 # Main content of this module
47 var content
= new Array[Writable]
52 if header
!= null then add header
55 add
"module {name}\n\n"
57 for i
in imports
do add
"import {i}\n"
60 for l
in content
do add
"{l}\n"
64 redef class ToolContext
65 # Where do we put a single result?
66 var opt_output
: OptionString = new OptionString("Output file (can also be 'stdout')", "-o", "--output")
68 # Where do we put the result?
69 var opt_dir
: OptionString = new OptionString("Output directory", "--dir")
71 # Depth of the visit and generation
72 var opt_depth
= new OptionEnum(["module", "group", "package"],
73 "Depth of the visit and generation", 0, "-d", "--depth")
77 option_context
.add_option
(opt_output
, opt_dir
, opt_depth
)
83 # Get the type of the class `Serializable`
84 var serializable_type
: MClassType is lazy
do
85 return self.get_primitive_class
("Serializable").mclass_type
90 # Is this type fully visible from `mmodule`?
91 fun is_visible_from
(mmodule
: MModule): Bool is abstract
94 redef class MClassType
95 redef fun is_visible_from
(mmodule
) do
96 return mmodule
.is_visible
(mclass
.intro_mmodule
, mclass
.visibility
)
100 redef class MNullableType
101 redef fun is_visible_from
(mmodule
) do return mtype
.is_visible_from
(mmodule
)
104 redef class MGenericType
105 redef fun is_visible_from
(mmodule
)
107 for arg_mtype
in arguments
do if not arg_mtype
.is_visible_from
(mmodule
) then return false
112 var toolcontext
= new ToolContext
113 toolcontext
.tooldescription
= """
114 Usage: nitserial [OPTION] program.nit [other_program.nit [...]]
115 Generates a serialization support module"""
117 toolcontext
.process_options
(args
)
118 var arguments
= toolcontext
.option_context
.rest
121 if toolcontext
.opt_output
.value
!= null and toolcontext
.opt_dir
.value
!= null then
122 print
"Error: cannot use both --dir and --output"
125 if arguments
.length
> 1 and toolcontext
.opt_output
.value
!= null then
126 print
"Error: --output needs a single source file. Do you prefer --dir?"
130 var model
= new Model
131 var modelbuilder
= new ModelBuilder(model
, toolcontext
)
133 var mmodules
= modelbuilder
.parse_full
(arguments
)
134 modelbuilder
.run_phases
136 # Create a distinct support module per target modules
137 for mmodule
in mmodules
do
138 # Name of the support module
141 # Path to the support module
142 var module_path
= toolcontext
.opt_output
.value
143 if module_path
== null then
144 module_name
= "{mmodule.name}_serial"
145 module_path
= "{module_name}.nit"
147 var dir
= toolcontext
.opt_dir
.value
148 if dir
!= null then module_path
= dir
.join_path
(module_path
)
149 else if module_path
== "stdout" then
150 module_name
= "{mmodule.name}_serial"
152 else if module_path
.has_suffix
(".nit") then
153 module_name
= module_path
.basename
(".nit")
155 module_name
= module_path
.basename
156 module_path
+= ".nit"
159 var target_modules
= null
160 var importations
= null
161 var mgroup
= mmodule
.mgroup
162 if toolcontext
.opt_depth
.value
== 1 and mgroup
!= null then
163 modelbuilder
.scan_group mgroup
164 target_modules
= mgroup
.mmodules
165 else if toolcontext
.opt_depth
.value
== 2 then
167 target_modules
= new Array[MModule]
168 importations
= new Array[MModule]
169 if mgroup
!= null then
170 for g
in mgroup
.mpackage
.mgroups
do
171 target_modules
.add_all g
.mmodules
174 for g
in mgroup
.in_nesting
.direct_smallers
do
175 var dm
= g
.default_mmodule
181 for m
in mgroup
.mmodules
do
187 if target_modules
== null then target_modules
= [mmodule
]
188 if importations
== null then importations
= target_modules
190 var nit_module
= new NitModule(module_name
)
191 nit_module
.header
= """
192 # This file is generated by nitserial
193 # Do not modify, but you can redef
196 for importation
in importations
do
197 nit_module
.imports
.add importation
.name
200 nit_module
.imports
.add
"serialization"
202 nit_module
.content
.add
"""
203 redef class Deserializer
204 redef fun deserialize_class(name)
207 var serializable_type
= mmodule
.serializable_type
208 var compiled_types
= new Array[MType]
209 for m
in target_modules
do
210 nit_module
.content
.add
"""
211 # Module: {{{m.to_s}}}"""
213 var rta
= modelbuilder
.do_rapid_type_analysis
(m
)
215 for mtype
in rta
.live_types
do
216 # We are only interested in instanciated generics, subtypes of Serializable
217 # and which are visible.
218 if mtype
isa MGenericType and
219 mtype
.is_subtype
(m
, null, serializable_type
) and
220 mtype
.is_visible_from
(mmodule
) and
221 mtype
.mclass
.kind
== concrete_kind
and
222 not compiled_types
.has
(mtype
) then
224 compiled_types
.add mtype
225 nit_module
.content
.add
"""
226 if name == \"{{{mtype}}}\" then return new {{{mtype}}}.from_deserializer(self)"""
231 nit_module
.content
.add
"""
236 # Compile support module
237 if module_path
!= null then
239 nit_module
.write_to_file module_path
242 nit_module
.write_to stdout