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## com.saxonica.stream.watch
Class EmptyWatch

    java.lang.Object
      com.saxonica.validate.AbstractWatch
          com.saxonica.stream.watch.ComposingWatch
              com.saxonica.stream.watch.CountWatch
                  com.saxonica.stream.watch.EmptyWatch

All Implemented Interfaces:
  Watch

    public class EmptyWatch

extends CountWatch

Streaming watch supporting the empty() function

Field Summary

Fields inherited from class com.saxonica.stream.watch.CountWatch
`count`

Constructor Summary
`EmptyWatch(Expression expression, Feed result, Stack<XPathContext> contextStack)`

Method Summary
`void` | `close()` The close() method is called immediately before the Watch is destroyed, that is, when the element whose declaration scopes the constraint implemented by this Watch goes out of scope.

Methods inherited from class com.saxonica.stream.watch.CountWatch
`endSelectedParentNode, notifySelectedLeafNode, startSelectedParentNode`

Methods inherited from class com.saxonica.stream.watch.ComposingWatch
`getContext, getContextStack, getResult, open`

Methods inherited from class com.saxonica.validate.AbstractWatch
`getAnchorNode, getNamespaceResolver, getPipelineConfiguration, getSelection, setAnchorNode, setNamespaceResolver, setPipelineConfiguration, setSelection`

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

Constructor Detail

### EmptyWatch

    public EmptyWatch(Expression expression,
                      Feed result,
                      Stack<XPathContext> contextStack)

Method Detail

### close

    public void close()
               throws XPathException

  Description copied from class: `CountWatch`
  The close() method is called immediately before the Watch is destroyed, that is, when the element whose declaration scopes the constraint implemented by this Watch goes out of scope.

  Specified by:
    `close` in interface `Watch`
  Overrides:
    `close` in class `CountWatch`
  Throws:
    `XPathException`

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Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.