PreAggrWindowIterator (IoTDB Server 0.14.0-preview2 API)

java.lang.Object
- org.apache.iotdb.db.utils.timerangeiterator.PreAggrWindowIterator

All Implemented Interfaces:

ITimeRangeIterator
```
public class PreAggrWindowIterator
extends java.lang.Object
implements ITimeRangeIterator
```
This class iteratively generates pre-aggregated time windows.
For example, startTime = 0, endTime = 11, interval = 5, slidingStep = 3, return [0,2),[2,3),[3,5),[5,6),[6,8),[8,9),[9,10)

Constructor Summary

Constructors
Constructor	Description
`PreAggrWindowIterator(long startTime, long endTime, long interval, long slidingStep, boolean isAscending)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`org.apache.iotdb.tsfile.read.common.TimeRange`	`getFirstTimeRange()`	return the first time range by sorting order
`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)

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PreAggrWindowIterator
```
public PreAggrWindowIterator(long startTime,
                             long endTime,
                             long interval,
                             long slidingStep,
                             boolean isAscending)
```
- Method Detail
  - getFirstTimeRange
```
public org.apache.iotdb.tsfile.read.common.TimeRange getFirstTimeRange()
```
    Description copied from interface: ITimeRangeIterator
    
    return the first time range by sorting order
    
    Specified by:
    
    getFirstTimeRange in interface ITimeRangeIterator
  - hasNextTimeRange
```
public boolean hasNextTimeRange()
```
    Specified by:
    
    hasNextTimeRange in interface ITimeRangeIterator
    
    Returns:
    
    whether current iterator has next time range
  - nextTimeRange
```
public org.apache.iotdb.tsfile.read.common.TimeRange nextTimeRange()
```
    Description copied from interface: ITimeRangeIterator
    
    return the next time range according to curStartTime (the start time of the last returned time range)
    
    Specified by:
    
    nextTimeRange in interface ITimeRangeIterator
  - isAscending
```
public boolean isAscending()
```
    Specified by:
    
    isAscending in interface ITimeRangeIterator