SingularityPull

java.lang.Object
- net.sf.saxon.expr.flwor.TuplePull
- - net.sf.saxon.expr.flwor.SingularityPull

```
public class SingularityPull
extends TuplePull
```
The "singularity" tuple stream delivers a single empty tuple. It is the base tuple stream for the outermost for/let clause in a FLWOR expression

- Constructor Summary
  
  Constructors
  Constructor Description
  
  SingularityPull()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  boolean nextTuple(XPathContext context)
  Move on to the next tuple.
  - Methods inherited from class net.sf.saxon.expr.flwor.TuplePull
    close
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SingularityPull
```
public SingularityPull()
```
- Method Detail
  - nextTuple
```
public boolean nextTuple(XPathContext context)
```
    Move on to the next tuple. Before returning, this method must set all the variables corresponding to the "returned" tuple in the local stack frame associated with the context object
    
    Specified by:
    
    nextTuple in class TuplePull
    
    Parameters:
    
    context - the dynamic evaluation context
    
    Returns:
    
    true if another tuple has been generated; false if the tuple stream is exhausted. If the method returns false, the values of the local variables corresponding to this tuple stream are undefined.