enumadness.java

enum FileState {
	NEW {
            FileState pass() { return DOWNLOADING; }
            FileState fail() { return  NEW; }
        },
        DOWNLOADING {
            FileState pass() { return PROCESSING; }
            FileState fail() { return  DLFAILED; }
        },
	DLFAILED {
            FileState pass() { return DLFAILED; }
            FileState fail() { return  DLFAILED; }
        },
        PROCESSING {
            FileState pass() { return DONE; }
            FileState fail() { return  PROCESSFAILED; }
        },
	PROCESSFAILED {
            FileState pass() { return PROCESSFAILED; }
            FileState fail() { return  PROCESSFAILED; }
        },
        DONE {
            FileState pass() { return DONE; }
            FileState fail() { return  DONE; }
        };

        abstract FileState pass();
        abstract FileState fail();
}