Make create_tokenizer work with Japanese

spacy/ja/__init__.py

@@ -3,21 +3,39 @@ from __future__ import unicode_literals, print_function
 
 from os import path
 
-from ..language import Language
+from ..language import Language, BaseDefaults
+from ..tokenizer import Tokenizer
 from ..attrs import LANG
 from ..tokens import Doc
 
 from .language_data import *
 
-
-class Japanese(Language):
-    lang = 'ja'
-
-    def make_doc(self, text):
+class JapaneseTokenizer(object):
+    def __init__(self, cls, nlp=None):
+        self.vocab = nlp.vocab if nlp is not None else cls.create_vocab(nlp)
         try:
             from janome.tokenizer import Tokenizer
         except ImportError:
             raise ImportError("The Japanese tokenizer requires the Janome library: "
                               "https://github.com/mocobeta/janome")
-        words = [x.surface for x in Tokenizer().tokenize(text)]
+        self.tokenizer = Tokenizer()
+
+    def __call__(self, text):
+        words = [x.surface for x in self.tokenizer.tokenize(text)]
         return Doc(self.vocab, words=words, spaces=[False]*len(words))
+
+class JapaneseDefaults(BaseDefaults):
+    @classmethod
+    def create_tokenizer(cls, nlp=None):
+        return JapaneseTokenizer(cls, nlp)
+
+class Japanese(Language):
+    lang = 'ja'
+
+    Defaults = JapaneseDefaults
+
+    def make_doc(self, text):
+        words = self.tokenizer(text)
+        return Doc(self.vocab, words=words, spaces=[False]*len(words))
+
+