Package org.apache.iotdb.db.query.reader.series

Class SeriesReaderByTimestamp

java.lang.Object

org.apache.iotdb.db.query.reader.series.SeriesReaderByTimestamp

All Implemented Interfaces:

IReaderByTimestamp

public class SeriesReaderByTimestamp
extends java.lang.Object
implements IReaderByTimestamp

Constructor Summary

Constructors

Constructor	Description
SeriesReaderByTimestamp(org.apache.iotdb.commons.path.PartialPath seriesPath, java.util.Set<java.lang.String> allSensors, org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType, QueryContext context, java.util.List<TsFileResource> seqFileResource, java.util.List<TsFileResource> unseqFileResource, boolean ascending)
SeriesReaderByTimestamp(org.apache.iotdb.commons.path.PartialPath seriesPath, java.util.Set<java.lang.String> allSensors, org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType, QueryContext context, QueryDataSource dataSource, TsFileFilter fileFilter, boolean ascending)
SeriesReaderByTimestamp(SeriesReader seriesReader, boolean ascending)

Method Summary

Modifier and Type	Method	Description
java.lang.Object[]	getValuesInTimestamps(long[] timestamps, int length)	Returns the corresponding value under this timestamp.
protected boolean	hasNext(long timestamp)
boolean	readerIsEmpty()	Returns whether there is no more data in reader.

Methods inherited from class java.lang.Object

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

Constructor Detail

SeriesReaderByTimestamp

public SeriesReaderByTimestamp(org.apache.iotdb.commons.path.PartialPath seriesPath,
                               java.util.Set<java.lang.String> allSensors,
                               org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType,
                               QueryContext context,
                               QueryDataSource dataSource,
                               TsFileFilter fileFilter,
                               boolean ascending)

SeriesReaderByTimestamp

public SeriesReaderByTimestamp(SeriesReader seriesReader,
                               boolean ascending)

SeriesReaderByTimestamp

public SeriesReaderByTimestamp(org.apache.iotdb.commons.path.PartialPath seriesPath,
                               java.util.Set<java.lang.String> allSensors,
                               org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType,
                               QueryContext context,
                               java.util.List<TsFileResource> seqFileResource,
                               java.util.List<TsFileResource> unseqFileResource,
                               boolean ascending)

Method Detail

getValuesInTimestamps

public java.lang.Object[] getValuesInTimestamps(long[] timestamps,
                                                int length)
                                         throws java.io.IOException

Description copied from interface: IReaderByTimestamp

Returns the corresponding value under this timestamp. Returns null if no value under this timestamp.

Note that calling this method will change the status of this reader irreversibly just like next. The difference is that next moves one step forward while getValueInTimestamp advances towards the given timestamp.

Attention: DO call this method with monotonically increasing timestamps. There is no guarantee of correctness with any other way of calling. For example, DO NOT call this method twice with the same timestamp.

Specified by:

getValuesInTimestamps in interface IReaderByTimestamp

Throws:

java.io.IOException

readerIsEmpty

public boolean readerIsEmpty()
                      throws java.io.IOException

Description copied from interface: IReaderByTimestamp

Returns whether there is no more data in reader.

True means no more data. False means you can still get more data

Specified by:

readerIsEmpty in interface IReaderByTimestamp

Throws:

java.io.IOException

hasNext

protected boolean hasNext(long timestamp)
                   throws java.io.IOException

Throws:

java.io.IOException