public Object convertToData()

in empire-db/src/main/java/org/apache/empire/commons/ValueUtils.java [848:907]
48 lines of code
26 McCabe index (conditional complexity)

    public Object convertToData(DataType dataType, Object value)
    {
        // check null
        if (value == null)
            return null;
        // Cannot convert DBEXpr, return as is
        if (value instanceof DBExpr)
            return value;
        // Strings special
        if ((value instanceof String) && ((String)value).length()==0)
            return null;
        // check option entry
        if (value instanceof OptionEntry)
        {   // option value
            value = ((OptionEntry)value).getValue();
        }
        // check for enum
        if (value instanceof Enum<?>)
        {   // Convert Enum now (optional)
            // value = getEnumValue((Enum<?>)value, dataType.isNumeric());
            // Otherwise Enum will be converted later
            return value; 
        }
        // check type
        switch (dataType)
        {
            case BLOB:
                return value; // unchanged
            case BOOL:
                return toBoolean(value, false);
            case DATE:
            case DATETIME:
            case TIMESTAMP:
                // check type
                if ((value instanceof Date) || (value instanceof Temporal))
                    return value; // already a date or temporal
                // sysdate
                if (DBDatabase.SYSDATE.equals(value))
                    return value; // leave SYSDATE as is
                // try to convert
                try {
                    return toDate(value);
                } catch (ParseException e) {
                    throw new ValueConversionException(Date.class, value, e);
                }
            case INTEGER:
                return (value instanceof Number) ? value : toLong(value);
            case FLOAT:
                return (value instanceof Number) ? value : toDouble(value);
            case DECIMAL:
                return (value instanceof Number) ? value : toDecimal(value);
            case CHAR:
            case CLOB:
            case VARCHAR:                
                return (value instanceof String) ? value : value.toString(); // not not call getString(...);
            default:
                // use as is
                return value;
        }
    }