Java code snippet: Enumeration to return String value

TICKET("ticket"),
UNKNOWN("unknown");

private String tokenType;

TokenType(String tokenType) {
this.tokenType = tokenType;
}

public String getTokenType() {
return tokenType;
}

public boolean isTicket() {
return this == TICKET;
}

public boolean isValidType() {
return this == TICKET;
}

public static TokenType getByTokenType(String tokenType) {
String safeTokenType = (tokenType != null) ? tokenType.toLowerCase().trim() : "";

for (TokenType tt : values()) {
if (tt.getTokenType().equals(safeTokenType)) {
return tt;
}
}

return UNKNOWN;
}