polyglot.visit
Class ClassSerializer

java.lang.Object
  polyglot.visit.NodeVisitor
      polyglot.visit.ClassSerializer

public class ClassSerializer
extends NodeVisitor

Visitor which serializes class objects and adds a field to the class containing the serialization.

Field Summary

protected java.util.Date	date
protected ErrorQueue	eq
protected NodeFactory	nf
protected TypeEncoder	te
protected TypeSystem	ts
protected Version	ver

Constructor Summary

ClassSerializer(TypeSystem ts, NodeFactory nf, java.util.Date date, ErrorQueue eq, Version ver)

Method Summary

Node	leave(Node old, Node n, NodeVisitor v) This method is called after all of the children of n have been visited.
Node	override(Node n) Given a tree rooted at n, the visitor has the option of overriding all traversal of the children of n.

Methods inherited from class polyglot.visit.NodeVisitor

begin, enter, enter, finish, finish, leave, override, toString, visitEdge

Methods inherited from class java.lang.Object

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

Field Detail

te

protected TypeEncoder te

eq

protected ErrorQueue eq

date

protected java.util.Date date

ts

protected TypeSystem ts

nf

protected NodeFactory nf

ver

protected Version ver

Constructor Detail

ClassSerializer

public ClassSerializer(TypeSystem ts,
                       NodeFactory nf,
                       java.util.Date date,
                       ErrorQueue eq,
                       Version ver)

Method Detail

override

public Node override(Node n)

Description copied from class: NodeVisitor

Given a tree rooted at n, the visitor has the option of overriding all traversal of the children of n. If no changes were made to n and the visitor wishes to prevent further traversal of the tree, then it should return n. If changes were made to the subtree, then the visitor should return a copy of n with appropriate changes. Finally, if the visitor does not wish to override traversal of the subtree rooted at n, then it should return null.

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

Overrides:

override in class NodeVisitor

Parameters:

n - The root of the subtree to be traversed.

Returns:

A node if normal traversal is to stop, null if it is to continue.

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.