MemoryBlockIterator (Flink : Runtime 2.0.0 API)

All Known Implementing Classes:

BlockResettableMutableObjectIterator, NonReusingBlockResettableIterator, ReusingBlockResettableIterator
```
public interface MemoryBlockIterator
```
The memory block iterator is an iterator that always buffers a block of elements in memory.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  boolean nextBlock()
  Move the iterator to the next memory block.

- Method Detail
  - nextBlock
```
boolean nextBlock()
           throws IOException
```
    Move the iterator to the next memory block. The next memory block starts at the first element that was not in the block before. A special case is when no record was in the block before, which happens when this function is invoked two times directly in a sequence, without calling hasNext() or next in between. Then the block moves one element.
    
    Returns:
    
    True if a new memory block was loaded, false if there were no further records and hence no further memory block.
    
    Throws:
    
    IOException - Thrown, when advancing to the next block failed.