PushToPull

java.lang.Object
- com.saxonica.ee.stream.PushToPull

```
public class PushToPull
extends java.lang.Object
```
This class evaluates an expression in push mode in one thread, and provides an iterator to read the results of the expression in pull mode in the original thread.
It is used when an xsl:stream instruction is executed in pull mode, for example when it is called within a function. It is also used for the implicit xsl:stream instruction executed during streamed merging.

Since:

9.7. This class replaces the Conduit class used in previous Saxon releases, which used a home-grown equivalent of the BlockingQueue.

- Nested Class Summary
  
  Nested Classes
  Modifier and Type Class Description
  
  static interface PushToPull.Pusher
- Constructor Summary
  
  Constructors
  Constructor Description
  
  PushToPull(PushToPull.Pusher expression, XPathContext context)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  SequenceIterator getIterator()
  Get an iterator over the result of evaluating the supplied expression.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PushToPull
```
public PushToPull(PushToPull.Pusher expression,
                  XPathContext context)
```
- Method Detail
  - getIterator
```
public SequenceIterator getIterator()
```
    Get an iterator over the result of evaluating the supplied expression.
    
    Returns:
    
    an iterator. Calls to next() on this iterator will read items from the queue, waiting if necessary until the next item becomes available.