Package org.apache.iotdb.tsfile.write.record.datapoint

Class DataPoint

java.lang.Object

org.apache.iotdb.tsfile.write.record.datapoint.DataPoint

Direct Known Subclasses:

BooleanDataPoint, DoubleDataPoint, FloatDataPoint, IntDataPoint, LongDataPoint, StringDataPoint

public abstract class DataPoint
extends Object

This is a abstract class representing a data point. DataPoint consists of a measurement id and a data type. subclass of DataPoint need override method write(long time, IChunkWriter writer) .Every subclass has its data type and overrides a setting method for its data type.

Field Summary

Fields

Modifier and Type	Field	Description
protected String	measurementId	measurementId of this DataPoint.
protected TSDataType	type	value type of this DataPoint.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DataPoint(TSDataType type, String measurementId)	constructor of DataPoint.

Method Summary

Modifier and Type	Method	Description
static DataPoint	getDataPoint(TSDataType dataType, String measurementId, String value)	Construct one data point with data type and value.
String	getMeasurementId()
TSDataType	getType()
abstract Object	getValue()
void	setBoolean(boolean value)
void	setDouble(double value)
void	setFloat(float value)
void	setInteger(int value)
void	setLong(long value)
void	setString(Binary value)
String	toString()
abstract void	writeTo(long time, ChunkWriterImpl writer)	write this DataPoint by a SeriesWriter.

Methods inherited from class java.lang.Object

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

Field Detail

type

protected final TSDataType type

value type of this DataPoint.

measurementId

protected final String measurementId

measurementId of this DataPoint.

Constructor Detail

DataPoint

protected DataPoint(TSDataType type,
                    String measurementId)

constructor of DataPoint.

Parameters:

type - value type of this DataPoint

measurementId - measurementId of this DataPoint

Method Detail

getDataPoint

public static DataPoint getDataPoint(TSDataType dataType,
                                     String measurementId,
                                     String value)

Construct one data point with data type and value.

Parameters:

dataType - data type

measurementId - measurement id

value - value in string format

Returns:

data point class according to data type

writeTo

public abstract void writeTo(long time,
                             ChunkWriterImpl writer)
                      throws IOException

write this DataPoint by a SeriesWriter.

Parameters:

time - timestamp

writer - writer

Throws:

IOException - exception in IO

getMeasurementId

public String getMeasurementId()

getValue

public abstract Object getValue()

getType

public TSDataType getType()

toString

public String toString()

Overrides:

toString in class Object

setInteger

public void setInteger(int value)

setLong

public void setLong(long value)

setBoolean

public void setBoolean(boolean value)

setFloat

public void setFloat(float value)

setDouble

public void setDouble(double value)

setString

public void setString(Binary value)