Package com.saxonica.ee.stream.watch

This package contains defines the two interfaces Watch and WatchMaker, and various implementations of these interfaces.

These classes are used internally by Saxon-EE to support streamed execution. None of these classes is intended for direct use by user applications.

A Watch is used on a streaming pipeline to recognize specific events, such as the start of a selected element, and to take action when these events occur. A WatchMaker is a factory class for creating a particular kind of Watch. The WatchManager is a class that sits on the Receiver pipeline keeping track of which Watches are active, and notifying them of events so that they can decide whether they are of interest.

Interface Summary

Interface	Description
Watch	A Watch represents a class that is interested in looking at nodes passing down a push pipeline.
WatchMaker	A WatchMaker is a factory class for creating a Watch.

Class Summary

Class	Description
AbstractWatch	A Watch represents a class that is interested in looking at nodes for the purpose of evaluating uniqueness and key constraints, or for XSLT streaming.
AccumulatorWatch	This watch implements a single accumulator in streaming mode.
ApplyImportsAction	Watch for an xsl:apply-imports instruction.
ApplyTemplatesAction	This watch implements xsl:apply-templates in streaming mode.
ForEachAction	This watch implements xsl:for-each in streaming mode.
ForEachGroupParallelAction	This watch implements xsl:for-each-group in streaming mode, in cases where the population is being forked (using group-by), and where the population is not grounded.
ForEachGroupPartitionAction	This watch implements xsl:for-each-group in streaming mode, in cases where the population is being partitioned (that is, group-adjacent, group-starting-with, and group-ending-with), and where the population is not grounded.
IterateAction	This watch implements xsl:iterate in streaming mode.
MultiAccumulatorWatch	This watch managers a set of accumulators in streaming mode.
NextMatchAction	Watch for an xsl:next-match instruction.
PatternWatch	A Watch represents a class that is interested in looking at nodes for the purpose of evaluating uniqueness and key constraints, or for XSLT streaming; specifically, an implementation of Watch that retains a Pattern which is evaluated to see whether a particular node matches the Watch.
StreamWatch
Terminator	A Terminator provides a method that can be called to cause early termination of a streaming pass over an input document, in the case where no more information from the document is needed.
Trigger	A Trigger is a Watch that contains a pattern used for matching streamed nodes, and a WatchAction which is invoked when a matching node is found.
WatchManager	This class sits on a push pipeline and evaluates the passing element and attribute nodes.
WatchManager.GroupingScope