org.apache.iotdb.tsfile.write.page

Class PageWriter

java.lang.Object

org.apache.iotdb.tsfile.write.page.PageWriter

public class PageWriter
extends Object

This writer is used to write time-value into a page. It consists of a time encoder, a value encoder and respective OutputStream.

Constructor Summary

Constructors

Constructor and Description
PageWriter()
PageWriter(IMeasurementSchema measurementSchema)

Method Summary

Modifier and Type	Method and Description
long	estimateMaxMemSize() calculate max possible memory size it occupies, including time outputStream and value outputStream, because size outputStream is never used until flushing.
long	getPointNumber()
Statistics<? extends Serializable>	getStatistics()
ByteBuffer	getUncompressedBytes() getUncompressedBytes return data what it has been written in form of size of time list, time list, value list
void	initStatistics(TSDataType dataType)
void	reset(IMeasurementSchema measurementSchema) reset this page
void	setTimeEncoder(Encoder encoder)
void	setValueEncoder(Encoder encoder)
void	write(long[] timestamps, Binary[] values, int batchSize) write time series into encoder
void	write(long[] timestamps, boolean[] values, int batchSize) write time series into encoder
void	write(long[] timestamps, double[] values, int batchSize) write time series into encoder
void	write(long[] timestamps, float[] values, int batchSize) write time series into encoder
void	write(long[] timestamps, int[] values, int batchSize) write time series into encoder
void	write(long[] timestamps, long[] values, int batchSize) write time series into encoder
void	write(long time, Binary value) write a time value pair into encoder
void	write(long time, boolean value) write a time value pair into encoder
void	write(long time, double value) write a time value pair into encoder
void	write(long time, float value) write a time value pair into encoder
void	write(long time, int value) write a time value pair into encoder
void	write(long time, long value) write a time value pair into encoder
void	write(long time, short value) write a time value pair into encoder
int	writePageHeaderAndDataIntoBuff(PublicBAOS pageBuffer, boolean first) write the page header and data into the PageWriter's output stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

PageWriter

public PageWriter()

PageWriter

public PageWriter(IMeasurementSchema measurementSchema)

Method Detail

write

public void write(long time,
                  boolean value)

write a time value pair into encoder

write

public void write(long time,
                  short value)

write a time value pair into encoder

write

public void write(long time,
                  int value)

write a time value pair into encoder

write

public void write(long time,
                  long value)

write a time value pair into encoder

write

public void write(long time,
                  float value)

write a time value pair into encoder

write

public void write(long time,
                  double value)

write a time value pair into encoder

write

public void write(long time,
                  Binary value)

write a time value pair into encoder

write

public void write(long[] timestamps,
                  boolean[] values,
                  int batchSize)

write time series into encoder

write

public void write(long[] timestamps,
                  int[] values,
                  int batchSize)

write time series into encoder

write

public void write(long[] timestamps,
                  long[] values,
                  int batchSize)

write time series into encoder

write

public void write(long[] timestamps,
                  float[] values,
                  int batchSize)

write time series into encoder

write

public void write(long[] timestamps,
                  double[] values,
                  int batchSize)

write time series into encoder

write

public void write(long[] timestamps,
                  Binary[] values,
                  int batchSize)

write time series into encoder

getUncompressedBytes

public ByteBuffer getUncompressedBytes()
                                throws IOException

getUncompressedBytes return data what it has been written in form of size of time list, time list, value list

Returns:

a new readable ByteBuffer whose position is 0.

Throws:

IOException

writePageHeaderAndDataIntoBuff

public int writePageHeaderAndDataIntoBuff(PublicBAOS pageBuffer,
                                          boolean first)
                                   throws IOException

write the page header and data into the PageWriter's output stream.

Throws:

IOException

estimateMaxMemSize

public long estimateMaxMemSize()

calculate max possible memory size it occupies, including time outputStream and value outputStream, because size outputStream is never used until flushing.

Returns:

allocated size in time, value and outputStream

reset

public void reset(IMeasurementSchema measurementSchema)

reset this page

setTimeEncoder

public void setTimeEncoder(Encoder encoder)

setValueEncoder

public void setValueEncoder(Encoder encoder)

initStatistics

public void initStatistics(TSDataType dataType)

getPointNumber

public long getPointNumber()

getStatistics

public Statistics<? extends Serializable> getStatistics()