com.saxonica.stream.adjunct
Class AtomizerAdjunct

java.lang.Object
  extended by com.saxonica.stream.adjunct.StreamingAdjunct
      extended by com.saxonica.stream.adjunct.AtomizerAdjunct

public class AtomizerAdjunct
extends StreamingAdjunct

Watch factory class for an atomizer


Constructor Summary
AtomizerAdjunct()
           
 
Method Summary
 FeedMaker getFeedMaker(Expression expr, int arg)
          Get a FeedMaker, a factory class that creates a Watch to evaluate this expression in streaming mode.
 WatchMaker getWatchMaker(Expression expression, List<String> reasonsForFailure)
          Get a WatchMaker, a factory class that creates a Watch to evaluate this expression in streaming mode.
 
Methods inherited from class com.saxonica.stream.adjunct.StreamingAdjunct
getConfiguration, makeStreamingAdjunct, setConfiguration
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

AtomizerAdjunct

public AtomizerAdjunct()
Method Detail

getWatchMaker

public WatchMaker getWatchMaker(Expression expression,
                                List<String> reasonsForFailure)
Description copied from class: StreamingAdjunct
Get a WatchMaker, a factory class that creates a Watch to evaluate this expression in streaming mode. This method will only be called if the getImplementationMethod() method of the expression includes the value Expression.WATCH_METHOD

Overrides:
getWatchMaker in class StreamingAdjunct
Parameters:
expression - the expression to be evaluated in streaming mode
reasonsForFailure - if non-null, this is a list supplied by the caller which will be populated by the callee with one or more messages indicating why it was not possible to allocate a WatchMaker. Normally if the list is non-empty on return, the return value from the method will be null.
Returns:
a Watchmaker to evaluate the expression, or null if it is not streamable with respect to the specificed argument.

getFeedMaker

public FeedMaker getFeedMaker(Expression expr,
                              int arg)
Description copied from class: StreamingAdjunct
Get a FeedMaker, a factory class that creates a Watch to evaluate this expression in streaming mode.

Overrides:
getFeedMaker in class StreamingAdjunct
Parameters:
expr - the expression to be evaluated in streaming mode
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 method Expression.iterateSubExpressions()
Returns:
a Watchmaker to evaluate the expression, or null if it is not streamable with respect to the specificed argument.


Copyright (c) 2004-2011 Saxonica Limited. All rights reserved.