RootStreamer

java.lang.Object

com.saxonica.ee.stream.adjunct.StreamingAdjunct

com.saxonica.ee.stream.adjunct.RootStreamer

public class RootStreamer extends StreamingAdjunct

Constructor Summary

Constructors

Constructor

Description

RootStreamer()
Method Summary

Modifier and Type

Method

Description

PostureAndSweep

computeStreamability(ContextItemStaticInfoEE contextInfo, List<String> reasons)

Compute the posture and sweep of this expression as defined in the W3C streamability specifications.

Pattern

toStreamingPattern(Configuration config)

Convert this expression to a streaming pattern (a pattern used internally to match nodes during push processing of an event stream)

Methods inherited from class com.saxonica.ee.stream.adjunct.StreamingAdjunct
emptyAdjunctMap, findConsumingArg, genId, getConfiguration, getDefaultFeedMaker, getExpression, getFeedMaker, getWatchMaker, makeStreamingAdjunct, setConfiguration, setExpression

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- RootStreamer
  
  public RootStreamer()
Method Details
- toStreamingPattern
  
  public Pattern toStreamingPattern(Configuration config)
  
  Convert this expression to a streaming pattern (a pattern used internally to match nodes during push processing of an event stream)
  
  Overrides:
  
  toStreamingPattern in class StreamingAdjunct
  
  Parameters:
  
  config - the Saxon configuration
  
  Returns:
  
  the equivalent pattern if conversion succeeds; otherwise null
- computeStreamability
  
  public PostureAndSweep computeStreamability(ContextItemStaticInfoEE contextInfo, List<String> reasons)
  
  Description copied from class: StreamingAdjunct
  
  Compute the posture and sweep of this expression as defined in the W3C streamability specifications. This must be implemented in all subclasses that don't use the general streamability rules. The implementation should have the side-effect of computing the streamability of all subexpressions, recursively.
  
  Overrides:
  
  computeStreamability in class StreamingAdjunct
  
  Parameters:
  
  contextInfo - Information about the context item type and posture
  
  reasons - the caller may supply a list, in which case the implementation may add to this; the contents are human-readable messages explaining why the expression is not streamable.
  
  Returns:
  
  the posture and sweep of the expression