com.saxonica.ee.stream

Class PushToPull

java.lang.Object

com.saxonica.ee.stream.PushToPull

public class PushToPull
extends 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 mergeing.

Since:

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

Constructor Summary

Constructors

Constructor and Description
PushToPull(Expression expression, XPathContext context)

Method Summary

Methods

Modifier and Type	Method and 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(Expression expression,
          XPathContext context)

Method Detail

getIterator

public SequenceIterator getIterator()
                             throws XPathException

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.

Throws:

XPathException