Package com.saxonica.ee.stream.adjunct
Class TraceStreamer
java.lang.Object
com.saxonica.ee.stream.adjunct.StreamingAdjunct
com.saxonica.ee.stream.adjunct.TransmissionAdjunct
com.saxonica.ee.stream.adjunct.TraceStreamer
- All Implemented Interfaces:
FeedMaker
Implement streaming of fn:trace instruction.
-
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiongetFeedMaker
(int arg) Get a FeedMaker, a factory class that creates a Feed to evaluate this expression in streaming mode.makeItemFeed
(WatchManager watchManager, ItemFeed out, XPathContext context) Methods inherited from class com.saxonica.ee.stream.adjunct.TransmissionAdjunct
getWatchMaker, makeTransmissionFlow
Methods inherited from class com.saxonica.ee.stream.adjunct.StreamingAdjunct
computeStreamability, emptyAdjunctMap, findConsumingArg, genId, getConfiguration, getDefaultFeedMaker, getExpression, makeStreamingAdjunct, setConfiguration, setExpression, toStreamingPattern
-
Field Details
-
sequenceNr
public static int sequenceNr
-
-
Constructor Details
-
TraceStreamer
public TraceStreamer()
-
-
Method Details
-
getFeedMaker
Description copied from class:StreamingAdjunct
Get a FeedMaker, a factory class that creates a Feed to evaluate this expression in streaming mode. In many cases the StreamingAdjunct is itself a FeedMaker, in which case it returns itself. But where an expression has several operands, it will typically create different feeds depending on which argument is the streamed input, and in such cases the individual StreamingAdjunct makes the decision which feed to use, by returning an appropriate FeedMaker.- Overrides:
getFeedMaker
in classStreamingAdjunct
- Parameters:
arg
- identifies the argument with respect to which the expression is to be inverted: usually 0 to indicate the first argument is the value that is streamed. Argument numbering is the same as the sequence of arguments/operands returned by the methodExpression.operands()
- Returns:
- a FeedMaker to evaluate the expression, or null if it is not streamable with respect to the specificed argument.
- Throws:
XPathException
- in the event of a failure
-
makeItemFeed
public ItemFeed makeItemFeed(WatchManager watchManager, ItemFeed out, XPathContext context) throws XPathException - Specified by:
makeItemFeed
in interfaceFeedMaker
- Throws:
XPathException
-