contrib/jwrapper/src/jwrapper.nit

   1 # This file is part of NIT (http://www.nitlanguage.org).
   2 #
   3 # Copyright 2014 Frédéric Vachon <fredvac@gmail.com>
   4 #
   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
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  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.
  16
  17 # jwrapper wraps Java classes in extern Nit classes
  18 #
  19 # This tool takes class file, Jar archives and javap files as input,
  20 # and it outputs a Nit source file.
  21 # For further details on installation and usage, refer to the README file.
  22 #
  23 # Here's an overview of the project design :
  24 # * Grammar and lexer : `grammar/javap.sablecc`
  25 # * The `javap_visitor` implements the visitor that extracts data from the AST
  26 # * The `code_generator` takes these data and converts it to Nit code via the `jtype_converter` module and generate the output Nit file.
  27 # * The `model` contains data structures used to represent the data
  28 # * The `jwrapper` module implements the user interface
  29 module jwrapper
  30
  31 import opts
  32 import javap_test_parser
  33 import code_generator
  34 import javap_visitor
  35
  36 var opts = new OptionContext
  37
  38 var opt_unknown = new OptionEnum(["comment", "stub", "ignore"], "How to deal with unknown types", 0, "-u")
  39 var opt_verbose = new OptionCount("Verbosity", "-v")
  40 var opt_output = new OptionString("Output file", "-o")
  41 var opt_help = new OptionBool("Show this help message", "-h", "--help")
  42
  43 opts.add_option(opt_output, opt_unknown, opt_verbose, opt_help)
  44 opts.parse args
  45
  46 if opts.errors.not_empty or opts.rest.is_empty or opt_help.value then
  47         print """
  48 Usage: jwrapper [options] file [other_file [...]]
  49 Input files: bytecode Java class (.class), Jar archive (.jar) or javap output (.javap)
  50 Options:"""
  51         opts.usage
  52
  53         if opt_help.value then exit 0
  54         exit 1
  55 end
  56
  57 var out_file = opt_output.value
  58 if out_file == null then out_file = "out.nit"
  59
  60 if not "javap".program_is_in_path then
  61         print "Error: 'javap' must be in PATH"
  62         exit 1
  63 end
  64
  65 var javap = new ProcessReader("javap", "-public", dot_class)
  66
  67 var p = new TestParser_javap
  68 var tree = p.work(javap.read_all)
  69
  70 var converter = new JavaTypeConverter
  71
  72 var visitor = new JavaVisitor(converter)
  73 visitor.enter_visit(tree)
  74
  75 var generator = new CodeGenerator(out_file, visitor.java_class, opt_attr.value, opt_comment.value)
  76 generator.generate