Package com.saxonica.ee.stream.adjunct

## Class LastStreamer

- java.lang.Object
- - com.saxonica.ee.stream.adjunct.StreamingAdjunct
  - - com.saxonica.ee.stream.adjunct.LastStreamer

-     public class LastStreamer
      extends StreamingAdjunct

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `LastStreamer()` |

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `PostureAndSweep` | `computeStreamability​(ContextItemStaticInfoEE contextInfo, java.util.List<java.lang.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

      `findConsumingArg, 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 Detail

    - #### LastStreamer

          public LastStreamer()

  - ### Method Detail

    - #### 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,
                                                      java.util.List<java.lang.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