org.apache.iotdb.tsfile.encoding.encoder

Class TSEncodingBuilder

java.lang.Object

org.apache.iotdb.tsfile.encoding.encoder.TSEncodingBuilder

Direct Known Subclasses:

TSEncodingBuilder.Dictionary, TSEncodingBuilder.Freq, TSEncodingBuilder.GorillaV1, TSEncodingBuilder.GorillaV2, TSEncodingBuilder.Plain, TSEncodingBuilder.Regular, TSEncodingBuilder.Rle, TSEncodingBuilder.Ts2Diff, TSEncodingBuilder.Zigzag

public abstract class TSEncodingBuilder
extends Object

Each subclass of TSEncodingBuilder responds a enumerate value in TSEncoding, which stores several configuration related to responding encoding type to generate Encoder instance.
Each TSEncoding has a responding TSEncodingBuilder. The design referring to visit pattern provides same outer interface for different TSEncodings and gets rid of the duplicate switch-case code.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TSEncodingBuilder.Dictionary
static class	TSEncodingBuilder.Freq for INT32, INT64, FLOAT, DOUBLE.
static class	TSEncodingBuilder.GorillaV1 for FLOAT, DOUBLE.
static class	TSEncodingBuilder.GorillaV2 for FLOAT, DOUBLE, INT, LONG.
static class	TSEncodingBuilder.Plain for all TSDataType.
static class	TSEncodingBuilder.Regular for INT32, INT64
static class	TSEncodingBuilder.Rle for ENUMS, INT32, BOOLEAN, INT64, FLOAT, DOUBLE.
static class	TSEncodingBuilder.Ts2Diff for INT32, INT64, FLOAT, DOUBLE.
static class	TSEncodingBuilder.Zigzag

Field Summary

Fields

Modifier and Type	Field and Description
protected TSFileConfig	conf

Constructor Summary

Constructors

Constructor and Description
TSEncodingBuilder()

Method Summary

Modifier and Type	Method and Description
abstract Encoder	getEncoder(TSDataType type) return a thread safe series's encoder with different types and parameters according to its measurement id and data type.
static TSEncodingBuilder	getEncodingBuilder(TSEncoding type) return responding TSEncodingBuilder from a TSEncoding.
abstract void	initFromProps(Map<String,String> props) for TSEncoding, JSON is a kind of type for initialization.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

conf

protected final TSFileConfig conf

Constructor Detail

TSEncodingBuilder

public TSEncodingBuilder()

Method Detail

getEncodingBuilder

public static TSEncodingBuilder getEncodingBuilder(TSEncoding type)

return responding TSEncodingBuilder from a TSEncoding.

Parameters:

type - - given encoding type

Returns:

- responding TSEncodingBuilder

getEncoder

public abstract Encoder getEncoder(TSDataType type)

return a thread safe series's encoder with different types and parameters according to its measurement id and data type.

Parameters:

type - - given data type

Returns:

- return a Encoder

initFromProps

public abstract void initFromProps(Map<String,String> props)

for TSEncoding, JSON is a kind of type for initialization. InitFromJsonObject gets values from JSON object which will be used latter.
if this type has extra parameters to construct, override it.

Parameters:

props - - properties of encoding

toString

public String toString()

Overrides:

toString in class Object