public static void writeDatum()

in src/org/apache/pig/data/DataReaderWriter.java [222:366]
126 lines of code
23 McCabe index (conditional complexity)

    public static void writeDatum(
            DataOutput out,
            Object val) throws IOException {
        // Read the data type
        byte type = DataType.findType(val);
        switch (type) {
            case DataType.TUPLE:
                Tuple t = (Tuple)val;
                out.writeByte(DataType.TUPLE);
                int sz = t.size();
                out.writeInt(sz);
                for (int i = 0; i < sz; i++) {
                    DataReaderWriter.writeDatum(out, t.get(i));
                }
                break;

            case DataType.BAG:
                DataBag bag = (DataBag)val;
                out.writeByte(DataType.BAG);
                out.writeLong(bag.size());
                Iterator<Tuple> it = bag.iterator();
                while (it.hasNext()) {
                    DataReaderWriter.writeDatum(out, it.next());
                }
                break;

            case DataType.MAP: {
                out.writeByte(DataType.MAP);
                Map<String, Object> m = (Map<String, Object>)val;
                out.writeInt(m.size());
                Iterator<Map.Entry<String, Object> > i =
                    m.entrySet().iterator();
                while (i.hasNext()) {
                    Map.Entry<String, Object> entry = i.next();
                    writeDatum(out, entry.getKey());
                    writeDatum(out, entry.getValue());
                }
                break;
                               }

            case DataType.INTERNALMAP: {
                out.writeByte(DataType.INTERNALMAP);
                Map<Object, Object> m = (Map<Object, Object>)val;
                out.writeInt(m.size());
                Iterator<Map.Entry<Object, Object> > i =
                    m.entrySet().iterator();
                while (i.hasNext()) {
                    Map.Entry<Object, Object> entry = i.next();
                    writeDatum(out, entry.getKey());
                    writeDatum(out, entry.getValue());
                }
                break;
                               }

            case DataType.INTEGER:
                out.writeByte(DataType.INTEGER);
                out.writeInt((Integer)val);
                break;

            case DataType.LONG:
                out.writeByte(DataType.LONG);
                out.writeLong((Long)val);
                break;

            case DataType.FLOAT:
                out.writeByte(DataType.FLOAT);
                out.writeFloat((Float)val);
                break;

            case DataType.DOUBLE:
                out.writeByte(DataType.DOUBLE);
                out.writeDouble((Double)val);
                break;

            case DataType.BOOLEAN:
                out.writeByte(DataType.BOOLEAN);
                out.writeBoolean((Boolean)val);
                break;

            case DataType.BYTE:
                out.writeByte(DataType.BYTE);
                out.writeByte((Byte)val);
                break;

            case DataType.DATETIME:
                out.writeByte(DataType.DATETIME);
                out.writeLong(((DateTime)val).getMillis());
                out.writeShort(((DateTime)val).getZone().getOffset((DateTime)val) / 60000);
                break;

            case DataType.BYTEARRAY: {
                out.writeByte(DataType.BYTEARRAY);
                DataByteArray bytes = (DataByteArray)val;
                out.writeInt(bytes.size());
                out.write(bytes.mData);
                break;
                                     }

            case DataType.BIGINTEGER:
                out.writeByte(DataType.BIGINTEGER);
                byte[] bytes = ((BigInteger)val).toByteArray();
                out.writeInt(bytes.length);
                out.write(bytes);
                break;

            case DataType.BIGDECIMAL:
                out.writeByte(DataType.BIGDECIMAL);
                byte[] bt =  ((BigDecimal)val).toString().getBytes(DataReaderWriter.UTF8);
                out.writeInt(bt.length);
                out.write(bt);
                break;

            case DataType.CHARARRAY: {
                String s = (String)val;
                byte[] utfBytes = s.getBytes(DataReaderWriter.UTF8);
                int length = utfBytes.length;

                if(length < DataReaderWriter.UNSIGNED_SHORT_MAX) {
                    out.writeByte(DataType.CHARARRAY);
                    out.writeShort(length);
                    out.write(utfBytes);
                } else {
                	out.writeByte(DataType.BIGCHARARRAY);
                	out.writeInt(length);
                	out.write(utfBytes);
                }
                break;
                                     }
            case DataType.GENERIC_WRITABLECOMPARABLE :
                out.writeByte(DataType.GENERIC_WRITABLECOMPARABLE);
                //store the class name, so we know the class to create on read
                writeDatum(out, val.getClass().getName());
                Writable writable = (Writable)val;
                writable.write(out);
                break;

            case DataType.NULL:
                out.writeByte(DataType.NULL);
                break;

            default:
                throw new RuntimeException("Unexpected data type " + type +
                    " found in stream.");
        }
    }