polyglot.visit
Class ExtensionCleaner

java.lang.Object
  extended by polyglot.visit.NodeVisitor
      extended by polyglot.visit.ExtensionCleaner
All Implemented Interfaces:
java.lang.Cloneable, Copy

public class ExtensionCleaner
extends NodeVisitor

This visitor overwrites all extension object refs with null, sets delegate object refs to point back to the node, and strips type information out.


Field Summary
protected  ExtensionInfo javaExt
           
protected  NodeFactory nf
           
protected  TypeSystem ts
           
 
Constructor Summary
ExtensionCleaner(ExtensionInfo javaExt)
           
 
Method Summary
protected  PackageNode convert(PackageNode n)
           
protected  TypeNode convert(TypeNode n)
           
 Node leave(Node old, Node n, NodeVisitor v)
          This method is called after all of the children of n have been visited.
protected  Node strip(Node n)
           
 
Methods inherited from class polyglot.visit.NodeVisitor
begin, copy, enter, enter, finish, finish, leave, override, override, toString, visitEdge, visitEdgeNoOverride
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

nf

protected NodeFactory nf

ts

protected TypeSystem ts

javaExt

protected ExtensionInfo javaExt
Constructor Detail

ExtensionCleaner

public ExtensionCleaner(ExtensionInfo javaExt)
Method Detail

leave

public Node leave(Node old,
                  Node n,
                  NodeVisitor v)
Description copied from class: NodeVisitor
This method is called after all of the children of n have been visited. In this case, these children were visited by the visitor v. This is the last chance for the visitor to modify the tree rooted at n. This method will be called exactly the same number of times as entry is called. That is, for each node that is not overriden, enter and leave are each called exactly once.

Note that if old == n then the vistior should make a copy of n before modifying it. It should then return the modified copy.

This method is typically called by the method leave(parent, old, n v). If a subclass overrides the method leave(parent, old, n v) then this method may not be called.

Overrides:
leave in class NodeVisitor
Parameters:
old - The original state of root of the current subtree.
n - The current state of the root of the current subtree.
v - The NodeVisitor object used to visit the children.
Returns:
The final result of the traversal of the tree rooted at n.

strip

protected Node strip(Node n)

convert

protected TypeNode convert(TypeNode n)

convert

protected PackageNode convert(PackageNode n)