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

类 SeriesReaderByTimestamp

java.lang.Object

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

所有已实现的接口:

IReaderByTimestamp

public class SeriesReaderByTimestamp
extends Object
implements IReaderByTimestamp

构造器概要

构造器

构造器和说明
SeriesReaderByTimestamp(PartialPath seriesPath, Set<String> allSensors, TSDataType dataType, QueryContext context, List<TsFileResource> seqFileResource, List<TsFileResource> unseqFileResource, boolean ascending)
SeriesReaderByTimestamp(PartialPath seriesPath, Set<String> allSensors, TSDataType dataType, QueryContext context, QueryDataSource dataSource, TsFileFilter fileFilter, boolean ascending)
SeriesReaderByTimestamp(SeriesReader seriesReader, boolean ascending)

方法概要

限定符和类型	方法和说明
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.

从类继承的方法 java.lang.Object

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

构造器详细资料

SeriesReaderByTimestamp

public SeriesReaderByTimestamp(PartialPath seriesPath,
                               Set<String> allSensors,
                               TSDataType dataType,
                               QueryContext context,
                               QueryDataSource dataSource,
                               TsFileFilter fileFilter,
                               boolean ascending)

SeriesReaderByTimestamp

public SeriesReaderByTimestamp(SeriesReader seriesReader,
                               boolean ascending)

SeriesReaderByTimestamp

public SeriesReaderByTimestamp(PartialPath seriesPath,
                               Set<String> allSensors,
                               TSDataType dataType,
                               QueryContext context,
                               List<TsFileResource> seqFileResource,
                               List<TsFileResource> unseqFileResource,
                               boolean ascending)

方法详细资料

getValuesInTimestamps

public Object[] getValuesInTimestamps(long[] timestamps,
                                      int length)
                               throws IOException

从接口复制的说明: 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.

指定者:

getValuesInTimestamps 在接口中 IReaderByTimestamp

抛出:

IOException

readerIsEmpty

public boolean readerIsEmpty()
                      throws IOException

从接口复制的说明: IReaderByTimestamp

Returns whether there is no more data in reader.

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

指定者:

readerIsEmpty 在接口中 IReaderByTimestamp

抛出:

IOException

hasNext

protected boolean hasNext(long timestamp)
                   throws IOException

抛出:

IOException