net.sf.saxon.expr.flwor
Class ReturnClausePush
java.lang.Object
net.sf.saxon.expr.flwor.TuplePush
net.sf.saxon.expr.flwor.ReturnClausePush
public class ReturnClausePush
- extends TuplePush
The class represents the final stage in a push-mode tuple pipeline. The previous stages
have stored the values corresponding to the current tuple in local variables on the
stack; all that remains is to evaluate the return expression (with reference to these
variables) and send the results to the current receiver.
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 |
ReturnClausePush
public ReturnClausePush(Expression returnExpr)
processTuple
public void processTuple(XPathContext context)
throws XPathException
- 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
- 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.