4

The default toString prints the int value instead of the enum name. Is there an easy way to make it print the enum name instead?

Raymond Ho
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    Your first sentence is not correct. `toString()` returns the name of the constant by default. If you are using something that overrides `toString`, you can get at the name by using `name()` instead. – roippi Jul 23 '13 at 01:20
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    Are you using the `enum` class? If so, someone else has overridden your `toString()` method. The behavior is to print the name of the value: http://docs.oracle.com/javase/6/docs/api/java/lang/Enum.html – Jerome Jul 23 '13 at 01:23
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    To people who are responding, Raymond is probably talking about Enum's in protocol buffers !!! – Bruce Martin Jul 23 '13 at 01:37
  • To @Raymond, please tell us how are you accessing protocol-buffers, When you generate java, it should generate a standard Java-Enum which toString() = Enum-Value. Are you DynamicMessage or Lite-Messages or something other than standard Protocol Buffers. Some code would be useful as well ??? – Bruce Martin Jul 23 '13 at 02:32

3 Answers3

6

(Answer is for proto3)

Use Carl's enum example:

enum Foo {
  BAR = 1;
  BAZ = 5;
  QUX = 1234;
}

Suppose you have variable: Foo foo = Foo.BAR, to get the name of foo:

String fooName = foo.getValueDescriptor().getName(); //fooName="BAR"

Also see:

https://developers.google.com/protocol-buffers/docs/reference/java-generated#enum

https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/Descriptors.EnumDescriptor#getName()

luochenhuan
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0

For the following protobuf enum:

enum Foo {
  BAR = 1;
  BAZ = 5;
  QUX = 1234;
}

The docs say that:

An integer constant is also generated with the suffix _VALUE for each enum value.

It sounds like you are using the the constant "e.g. BAR_VALUE, BAZ_VALUE, or QUX_VALUE". Is this the case?

See: https://developers.google.com/protocol-buffers/docs/reference/java-generated#enum

Carl Mastrangelo
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0

You could get a list of the enum values using .values() in java.

Assuming you had a protobuf enum

enum Foo {
    BAR = 1;
    BAZ = 2;
}

If you referenced Foo from Java, you could get an array of Foo's values with Foo.values() - or if you were using a generic enum for the call, genericEnum.getDeclaringClass().getEnumConstants().

This would give you [BAR, BAZ].

Gingerade
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