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