Method toBoolean

src/org/apache/pig/data/DataType.java:649–711

Force a data object to a Boolean, if possible. Any numeric type can be forced to a Boolean, as well as CharArray, ByteArray. Complex types cannot be forced to a Boolean. This isn't particularly efficient, so if you already know that the object you have is a Boolean you should just cast it. @

(Object o, byte type)

     *             if the type can't be forced to a Boolean.
     */
    public static Boolean toBoolean(Object o, byte type) throws ExecException {
        try {
            switch (type) {
            case NULL:
                return null;
            case BOOLEAN:
                return (Boolean) o;
            case BYTE:
                return Boolean.valueOf(((Byte) o).byteValue() != 0);
            case INTEGER:
                return Boolean.valueOf(((Integer) o).intValue() != 0);
            case LONG:
                return Boolean.valueOf(((Long) o).longValue() != 0L);
            case BIGINTEGER:
                return Boolean.valueOf(!BigInteger.ZERO.equals(((BigInteger) o)));
            case BIGDECIMAL:
                return Boolean.valueOf(!BigDecimal.ZERO.equals(((BigDecimal) o)));
            case FLOAT:
                return Boolean.valueOf(((Float) o).floatValue() != 0.0F);
            case DOUBLE:
                return Boolean.valueOf(((Double) o).doubleValue() != 0.0D);
            case BYTEARRAY:
                String str = ((DataByteArray) o).toString();
                if (str.equalsIgnoreCase("true")) {
                    return Boolean.TRUE;
                } else if (str.equalsIgnoreCase("false")) {
                    return Boolean.FALSE;
                } else {
                    return null;
                }
            case CHARARRAY:
                if (((String) o).equalsIgnoreCase("true")) {
                    return Boolean.TRUE;
                } else if (((String) o).equalsIgnoreCase("false")) {
                    return Boolean.FALSE;
                } else {
                    return null;
                }
            case DATETIME:
            case MAP:
            case INTERNALMAP:
            case TUPLE:
            case BAG:
            case UNKNOWN:
            default:
                int errCode = 1071;
                String msg = "Cannot convert a " + findTypeName(o) + " to a Boolean";
                throw new ExecException(msg, errCode, PigException.INPUT);
            }
        } catch (ClassCastException cce) {
            throw cce;
        } catch (ExecException ee) {
            throw ee;
        } catch (NumberFormatException nfe) {
            int errCode = 1074;
            String msg = "Problem with formatting. Could not convert " + o + " to Float.";
            throw new ExecException(msg, errCode, PigException.INPUT, nfe);
        } catch (Exception e) {