MergeInstr.MergeKeyMappingFunction

java.lang.Object
- net.sf.saxon.expr.sort.MergeInstr.MergeKeyMappingFunction

All Implemented Interfaces:

ContextMappingFunction

Enclosing class:

MergeInstr
```
public static class MergeInstr.MergeKeyMappingFunction
extends java.lang.Object
implements ContextMappingFunction
```
Mapping function for items encountered during the merge; the mapping function wraps the merged item and its merge keys into a single composite object

- Constructor Summary
  
  Constructors
  Constructor Description
  
  MergeKeyMappingFunction(XPathContext baseContext, MergeInstr.MergeSource ms)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  SequenceIterator map(XPathContext context)
  Map one item to a sequence.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MergeKeyMappingFunction
```
public MergeKeyMappingFunction(XPathContext baseContext,
                               MergeInstr.MergeSource ms)
```
- Method Detail
  - map
```
public SequenceIterator map(XPathContext context)
                     throws XPathException
```
    Description copied from interface: ContextMappingFunction
    
    Map one item to a sequence.
    
    Specified by:
    
    map in interface ContextMappingFunction
    
    Parameters:
    
    context - The processing context. The item to be mapped is the context item identified from this context: the values of position() and last() also relate to the set of items being mapped
    
    Returns:
    
    a SequenceIterator over the sequence of items that the supplied input item maps to
    
    Throws:
    
    XPathException - if a dynamic error is detected