WhileClausePush

java.lang.Object
- net.sf.saxon.expr.flwor.TuplePush
- - net.sf.saxon.expr.flwor.WhileClausePush

```
public class WhileClausePush
extends TuplePush
```
This class represents the tuple stream delivered as the output of a while clause in a FLWOR expression: that is, it supplies all the tuples in its input stream that satisfy a specified predicate until it finds one that doesn't. It does not change the values of any variables in the tuple stream.

Constructor Summary

Constructors
Constructor Description

WhileClausePush(Outputter outputter, TuplePush destination, BooleanEvaluator predicate)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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 net.sf.saxon.expr.flwor.TuplePush
getOutputter

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

- Constructor Detail
  - WhileClausePush
```
public WhileClausePush(Outputter outputter,
                       TuplePush destination,
                       BooleanEvaluator 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