ITimeRangeIterator (IoTDB Server 0.14.0-preview2 API)

All Known Implementing Classes:

AggrWindowIterator, PreAggrWindowIterator, PreAggrWindowWithNaturalMonthIterator, SingleTimeWindowIterator
```
public interface ITimeRangeIterator
```
This interface used for iteratively generating aggregated time windows in GROUP BY query.
It will return a leftCloseRightClose time window, by decreasing maxTime if leftCloseRightOpen and increasing minTime if leftOpenRightClose.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`long`	`currentOutputTime()`	As there is only one timestamp can be output for a time range, this method will return the output time based on leftCloseRightOpen or not.
`default org.apache.iotdb.tsfile.read.common.TimeRange`	`getFinalTimeRange(org.apache.iotdb.tsfile.read.common.TimeRange timeRange, boolean leftCRightO)`
`org.apache.iotdb.tsfile.read.common.TimeRange`	`getFirstTimeRange()`	return the first time range by sorting order
`long`	`getTotalIntervalNum()`
`boolean`	`hasNextTimeRange()`
`boolean`	`isAscending()`
`org.apache.iotdb.tsfile.read.common.TimeRange`	`nextTimeRange()`	return the next time range according to curStartTime (the start time of the last returned time range)

- Method Detail
  - getFirstTimeRange
```
org.apache.iotdb.tsfile.read.common.TimeRange getFirstTimeRange()
```
    return the first time range by sorting order
  - hasNextTimeRange
```
boolean hasNextTimeRange()
```
    Returns:
    
    whether current iterator has next time range
  - nextTimeRange
```
org.apache.iotdb.tsfile.read.common.TimeRange nextTimeRange()
```
    return the next time range according to curStartTime (the start time of the last returned time range)
  - isAscending
```
boolean isAscending()
```
  - getFinalTimeRange
```
default org.apache.iotdb.tsfile.read.common.TimeRange getFinalTimeRange(org.apache.iotdb.tsfile.read.common.TimeRange timeRange,
                                                                        boolean leftCRightO)
```
  - currentOutputTime
```
long currentOutputTime()
```
    As there is only one timestamp can be output for a time range, this method will return the output time based on leftCloseRightOpen or not.
    
    Returns:
    
    minTime if leftCloseRightOpen, else maxTime.
  - getTotalIntervalNum
```
long getTotalIntervalNum()
```