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["Bundle"] = "NativeBundle"
  47                 type_map["String"] = "JavaString"
  48                 type_map["CharSequence"] = "JavaString"
  49
  50                 # Collections
  51                 type_map["List"] = "Array"
  52                 type_map["ArrayList"] = "Array"
  53                 type_map["LinkedList"] = "List"
  54                 type_map["Vector"] = "Array"
  55
  56                 type_map["Set"] = "HashSet"
  57                 type_map["SortedSet"] = "Still have to make my mind on this one"
  58                 type_map["HashSet"] = "HashSet"
  59                 type_map["TreeSet"] = "HashSet"
  60                 type_map["LinkedHashSet"] = "HashSet"
  61                 type_map["Map"] = "HashMap"
  62                 type_map["SortedMap"] = "RBTreeMap"
  63                 type_map["HashMap"] = "HashMap"
  64                 type_map["TreeMap"] = "RBTreeMap"
  65                 type_map["Hashtable"] = "HashMap"
  66                 type_map["LinkedHashMap"] = "HashMap"
  67
  68                 # Cast if the type is given as a parameter
  69                 param_cast_map["byte"] = "(byte)"
  70                 param_cast_map["Byte"] = "(Byte)"
  71                 param_cast_map["short"] = "(short)"
  72                 param_cast_map["Short"] = "(short)"
  73                 param_cast_map["float"] = "(float)"
  74                 param_cast_map["Float"] = "(float)"
  75                 # FIXME: Uncomment as soon as Nit `Int` will be equivalent to Java `long`
  76                 # param_cast_map["int"] = "int"
  77                 # param_cast_map["Integer"] = "int"
  78
  79                 # Cast if the type is given as a return value
  80                 return_cast_map["CharSequence"] = "(String)"
  81                 # FIXME: Erase as soon as the Nit `Int` type will become a Java `long`
  82                 return_cast_map["long"] = "(int)"
  83         end
  84
  85         fun to_nit_type(java_type: String): nullable String
  86         do
  87                 return self.type_map.get_or_null(java_type)
  88         end
  89
  90         fun cast_as_param(java_type: String): String
  91         do
  92                 return self.param_cast_map.get_or_default(java_type, "")
  93         end
  94
  95         fun cast_as_return(java_type: String): String
  96         do
  97                 return self.return_cast_map.get_or_default(java_type, "")
  98         end
  99 end