AttendanceStatus.java

package in.partake.model.dto.auxiliary;

public enum AttendanceStatus {
    UNKNOWN("不明"),
    PRESENT("出席"),
    ABSENT("欠席");

    private static final AttendanceStatus SAFE_VALUE = UNKNOWN;
    private final String readableString;

    private AttendanceStatus(String readableString) {
        this.readableString = readableString;
    }

    public static AttendanceStatus safeValueOf(String str) {
        if (str == null) { return SAFE_VALUE; }
        if ("".equals(str)) { return SAFE_VALUE; }

        if ("present".equalsIgnoreCase(str)) { return PRESENT; }
        if ("absent".equalsIgnoreCase(str))  { return ABSENT; }
        if ("unknown".equalsIgnoreCase(str)) { return UNKNOWN; }

        try {
            return valueOf(str);
        } catch (IllegalArgumentException e) {
            return SAFE_VALUE;
        }
    }

    public static boolean isValueOf(String str) {
        if ("present".equalsIgnoreCase(str)) { return true; }
        if ("absent".equalsIgnoreCase(str))  { return true; }
        if ("unknown".equalsIgnoreCase(str)) { return true; }

        return false;
    }

    public String toHumanReadableString() {
        return readableString;
    }
}