[#GROOVY-2210] The behavior of enum is different between Java and Groovy in switch statement.

groovy

The behavior of enum is different between Java and Groovy in switch statement.

Created: 15/Oct/07 04:02 AM Updated: 02/Nov/07 08:39 AM

Component/s:

None

Affects Version/s:

1.1-rc-1

Fix Version/s:

1.1-rc-2

Time Tracking:

Not Specified

Environment:

Windows 2000
Groovy Version: 1.1-rc-1
JVM: 1.6.0_02-b05

Description

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The following code snippet can not be run, but after I used the full name such as Fruit.APPLE, Fruit.ORANGE, Fruit.BANANA, the code can be run successfully.

public enum Fruit {
	APPLE, ORANGE, BANANA
}

Fruit f = Fruit.BANANA
println f
switch (f) {
	case APPLE:
	  println "Apple"
	  break
	case ORANGE:
	  println "Orange"
	  break
	case BANANA:
	  println "Banana"
	  break
	default:
	  println "Will not reach!"
	  break  
}

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Paul King added a comment - 16/Oct/07 08:28 AM

Indeed. Not only does Java allow the class name to be dropped, it requires it:

Temp.java:22: an enum switch case label must be the unqualified name of an enumeration constant
    case Fruit.ORANGE:
              ^

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Jochen Theodorou added a comment - 02/Nov/07 08:39 AM

for now we require the class name in Groovy, because enums are not imported by default. It would differ to much from java. You can have the switch-case you showed if you add a static import like "import static Fruit.*". I guess that additional line is not too much of a problem