org.apache.iotdb.tsfile.encoding.encoder

Class FloatEncoder

java.lang.Object

org.apache.iotdb.tsfile.encoding.encoder.Encoder

org.apache.iotdb.tsfile.encoding.encoder.FloatEncoder

public class FloatEncoder
extends Encoder

Encoder for float or double value using rle or two-diff according to following grammar.

 float encoder: <maxPointvalue> <encoded-data>
 maxPointvalue := number for accuracy of decimal places, store as unsigned var int
 encoded-data := same as encoder's pattern
 

Field Summary

Fields inherited from class org.apache.iotdb.tsfile.encoding.encoder.Encoder

MAX_POINT_NUMBER, MAX_STRING_LENGTH

Constructor Summary

Constructors

Constructor and Description
FloatEncoder(TSEncoding encodingType, TSDataType dataType, int maxPointNumber)

Method Summary

Modifier and Type	Method and Description
void	encode(double value, ByteArrayOutputStream out)
void	encode(float value, ByteArrayOutputStream out)
void	flush(ByteArrayOutputStream out) Write all values buffered in memory cache to OutputStream.
long	getMaxByteSize() The maximal possible memory size occupied by current Encoder.
int	getOneItemMaxSize() When encoder accepts a new incoming data point, the maximal possible size in byte it takes to store in memory.

Methods inherited from class org.apache.iotdb.tsfile.encoding.encoder.Encoder

encode, encode, encode, encode, encode, encode, getType, setType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FloatEncoder

public FloatEncoder(TSEncoding encodingType,
                    TSDataType dataType,
                    int maxPointNumber)

Method Detail

encode

public void encode(float value,
                   ByteArrayOutputStream out)

Overrides:

encode in class Encoder

encode

public void encode(double value,
                   ByteArrayOutputStream out)

Overrides:

encode in class Encoder

flush

public void flush(ByteArrayOutputStream out)
           throws IOException

Description copied from class: Encoder

Write all values buffered in memory cache to OutputStream.

Specified by:

flush in class Encoder

Parameters:

out - - ByteArrayOutputStream

Throws:

IOException - cannot flush to OutputStream

getOneItemMaxSize

public int getOneItemMaxSize()

Description copied from class: Encoder

When encoder accepts a new incoming data point, the maximal possible size in byte it takes to store in memory.

Overrides:

getOneItemMaxSize in class Encoder

Returns:

the maximal possible size of one data item encoded by this encoder

getMaxByteSize

public long getMaxByteSize()

Description copied from class: Encoder

The maximal possible memory size occupied by current Encoder. This statistic value doesn't involve OutputStream.

Overrides:

getMaxByteSize in class Encoder

Returns:

the maximal size of possible memory occupied by current encoder