net.sf.saxon.expr.flwor
Class WhereClausePush

java.lang.Object
  extended by net.sf.saxon.expr.flwor.TuplePush
      extended by net.sf.saxon.expr.flwor.WhereClausePush

public class WhereClausePush
extends TuplePush

This class represents the tuple stream delivered as the output of a where clause in a FLWOR expression: that is, it supplies all the tuples in its input stream that satisfy a specified predicate. It does not change the values of any variables in the tuple stream.


Constructor Summary
WhereClausePush(TuplePush destination, Expression predicate)
           
 
Method Summary
 void close()
          Close the tuple stream, indicating that no more tuples will be supplied
 void processTuple(XPathContext context)
          Notify the availability of the next tuple.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

WhereClausePush

public WhereClausePush(TuplePush destination,
                       Expression predicate)
Method Detail

processTuple

public void processTuple(XPathContext context)
                  throws XPathException
Description copied from class: TuplePush
Notify the availability of the next tuple. Before calling this method, the supplier of the tuples must set all the variables corresponding to the supplied tuple in the local stack frame associated with the context object

Specified by:
processTuple in class TuplePush
Parameters:
context - the dynamic evaluation context
Throws:
XPathException - if a dynamic error occurs

close

public void close()
           throws XPathException
Description copied from class: TuplePush
Close the tuple stream, indicating that no more tuples will be supplied

Overrides:
close in class TuplePush
Throws:
XPathException - if a dynamic error occurs


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