RowIterator (Flink : 2.0-SNAPSHOT API)

All Known Subinterfaces:

ResettableRowBuffer.ResettableIterator

All Known Implementing Classes:

BuildSideIterator, BuildSideIterator.BucketIterator, LongHashPartition.MatchIterator, LookupBucketIterator, ResettableExternalBuffer.BufferIterator, WrappedRowIterator
```
public interface RowIterator<T extends RowData>
```
An internal iterator interface which presents a more restrictive API than Iterator.
One major departure from the Java iterator API is the fusing of the `hasNext()` and `next()` calls: Java's iterator allows users to call `hasNext()` without immediately advancing the iterator to consume the next row, whereas RowIterator combines these calls into a single advanceNext() method.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`advanceNext()`	Advance this iterator by a single row.
`T`	`getRow()`	Retrieve the row from this iterator.

- Method Detail
  - advanceNext
```
boolean advanceNext()
```
    Advance this iterator by a single row. Returns `false` if this iterator has no more rows and `true` otherwise. If this returns `true`, then the new row can be retrieved by calling getRow().
  - getRow
```
T getRow()
```
    Retrieve the row from this iterator. This method is idempotent. It is illegal to call this method after [[advanceNext()]] has returned `false`.