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如何在JRuby中引用Class對象?

[英]How do I reference a Class object in JRuby?

我需要將對象類傳遞給方法(gson.fromJson),但JRuby說: 'org.jruby.gen.InterfaceImpl624212141@187ef71' is not a Class

如何在JRuby中引用類(例如Bob.class)?


include Java 
include_class Java::com.google.gson.Gson
include_class Java::com.bobmanager.Bob

def json_load(filename)
  gson = Gson.new
  jsonBob = IO.read filename
  $dto = gson.fromJson jsonBob, Bob.class  # <-- here is the problem: Bob.class  
end

json_load 'C:/json/1152.json'

產生以下內容:

<stack_trace_array message='org.jruby.embed.EvalFailedException: Native Exception: 'class java.lang.IllegalArgumentException'; Message: Type 'org.jruby.gen.InterfaceImpl624212141@187ef71' is not a Class, ParameterizedType, or GenericArrayType. Can't extract class.; StackTrace: java.lang.IllegalArgumentException: Type 'org.jruby.gen.InterfaceImpl624212141@187ef71' is not a Class, ParameterizedType, or GenericArrayType. Can't extract class.
    at com.google.gson.TypeUtils.toRawClass(TypeUtils.java:83)
    at com.google.gson.TypeInfo.<init>(TypeInfo.java:34)
    at com.google.gson.ObjectNavigator.accept(ObjectNavigator.java:102)
    at com.google.gson.JsonDeserializationContextDefault.fromJsonObject(JsonDeserializationContextDefault.java:73)
    at com.google.gson.JsonDeserializationContextDefault.deserialize(JsonDeserializationContextDefault.java:51)
    at com.google.gson.Gson.fromJson(Gson.java:568)
    at com.google.gson.Gson.fromJson(Gson.java:515)
    at com.google.gson.Gson.fromJson(Gson.java:484)
    at com.google.gson.Gson.fromJson(Gson.java:434)
' > 

嘗試使用Bob.java_class而不是Bob.class

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