contrib/jwrapper/src/jtype_converter.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 # Services to convert java type to nit type and get casts if needed
  18 module jtype_converter
  19
  20 redef class Sys
  21         # Converter between Java and Nit type
  22         var converter = new JavaTypeConverter
  23 end
  24
  25 class JavaTypeConverter
  26
  27         var type_map = new HashMap[String, String]
  28         var param_cast_map = new HashMap[String, String]
  29         var return_cast_map = new HashMap[String, String]
  30
  31         init
  32         do
  33                 # Java type to nit type
  34                 type_map["byte"] = "Int"
  35                 type_map["Byte"] = "Int"
  36                 type_map["short"] = "Int"
  37                 type_map["Short"] = "Int"
  38                 type_map["int"] = "Int"
  39                 type_map["Integer"] = "Int"
  40                 type_map["long"] = "Int"
  41                 type_map["Long"] = "Int"
  42                 type_map["char"] = "Char"
  43                 type_map["Character"] = "Char"
  44                 type_map["float"] = "Float"
  45                 type_map["Float"] = "Float"
  46                 type_map["double"] = "Float"
  47                 type_map["Double"] = "Float"
  48                 type_map["boolean"] = "Bool"
  49                 type_map["Boolean"] = "Bool"
  50                 type_map["Object"] = "JavaObject"
  51                 type_map["String"] = "JavaString"
  52                 type_map["CharSequence"] = "JavaString"
  53
  54
  55                 # Cast if the type is given as a parameter
  56                 param_cast_map["byte"] = "(byte)"
  57                 param_cast_map["Byte"] = "(Byte)"
  58                 param_cast_map["short"] = "(short)"
  59                 param_cast_map["Short"] = "(short)"
  60                 param_cast_map["float"] = "(float)"
  61                 param_cast_map["Float"] = "(float)"
  62                 param_cast_map["int"] = "(int)"
  63                 param_cast_map["Integer"] = "(int)"
  64
  65                 # Cast if the type is given as a return value
  66                 return_cast_map["CharSequence"] = "(String)"
  67         end
  68
  69         fun to_nit_type(java_type: String): nullable String
  70         do
  71                 return self.type_map.get_or_null(java_type)
  72         end
  73
  74         fun cast_as_param(java_type: String): String
  75         do
  76                 return self.param_cast_map.get_or_default(java_type, "")
  77         end
  78
  79         fun cast_as_return(java_type: String): String
  80         do
  81                 return self.return_cast_map.get_or_default(java_type, "")
  82         end
  83 end