Package net.sf.saxon.expr.parser

Class RebindingMap

java.lang.Object

net.sf.saxon.expr.parser.RebindingMap

public class RebindingMap
extends Object

A map from old bindings to new bindings, maintained during a copy() operation applied to an expression tree. When local variable bindings are copied, the mapping from old to new binding can be added to the list; when local variable references are encountered, the binding can be switched from the old binding to the new. Bindings are compared strictly using object identity. Some classes that implement the Binding interface have their own equals() method that could return true for two bindings that need to be treated as distinct.

Constructor Summary

Constructors

Constructor	Description
RebindingMap()

Method Summary

Modifier and Type	Method	Description
Binding	get(Binding oldBinding)	Get the new binding corresponding to an existing binding if there is one
void	put(Binding oldBinding, Binding newBinding)	Add an entry to the binding map

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

RebindingMap

public RebindingMap()

Method Details

put

public void put(Binding oldBinding,
 Binding newBinding)

Add an entry to the binding map

Parameters:

oldBinding - the existing binding

newBinding - the replacement binding

get

public Binding get(Binding oldBinding)

Get the new binding corresponding to an existing binding if there is one

Parameters:

oldBinding - the existing binding

Returns:

the new binding if one exists, or null otherwise