Package org.apache.iotdb.tsfile.read.reader.series

Class FileSeriesReaderByTimestamp

java.lang.Object

org.apache.iotdb.tsfile.read.reader.series.FileSeriesReaderByTimestamp

public class FileSeriesReaderByTimestamp
extends Object

Series reader is used to query one series of one tsfile, using this reader to query the value of a series with given timestamps.

Field Summary

Fields

Modifier and Type	Field	Description
protected IChunkLoader	chunkLoader
protected List<IChunkMetadata>	chunkMetadataList

Constructor Summary

Constructors

Constructor	Description
FileSeriesReaderByTimestamp(IChunkLoader chunkLoader, List<IChunkMetadata> chunkMetadataList)	init with chunkLoader and chunkMetaDataList.

Method Summary

Modifier and Type	Method	Description
TSDataType	getDataType()
Object	getValueInTimestamp(long timestamp)	get value with time equals timestamp.
boolean	hasNext()	Judge if the series reader has next time-value pair.

Methods inherited from class java.lang.Object

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

Field Detail

chunkLoader

protected IChunkLoader chunkLoader

chunkMetadataList

protected List<IChunkMetadata> chunkMetadataList

Constructor Detail

FileSeriesReaderByTimestamp

public FileSeriesReaderByTimestamp(IChunkLoader chunkLoader,
                                   List<IChunkMetadata> chunkMetadataList)

init with chunkLoader and chunkMetaDataList.

Method Detail

getDataType

public TSDataType getDataType()

getValueInTimestamp

public Object getValueInTimestamp(long timestamp)
                           throws IOException

get value with time equals timestamp. If there is no such point, return null.

Throws:

IOException

hasNext

public boolean hasNext()
                throws IOException

Judge if the series reader has next time-value pair.

Returns:

true if has next, false if not.

Throws:

IOException