mwalk.visitor
Class TraceVisitor

java.lang.Object
  |
  +--mwalk.visitor.AbstractVisitor
        |
        +--mwalk.visitor.TraceVisitor

public class TraceVisitor

extends AbstractVisitor

implements UpVisitor

A visitor used by the builder to add mtrace paths into the tree.

Version:

1.0

Author:

Robert Chalmers

Field Summary

protected int	hop Current hop count
(package private) TreeNode	parent Reference to parent node
protected MTrace	trace Associated mtrace object

Fields inherited from class mwalk.visitor.AbstractVisitor

CFG_BASE, eval, seen, verbose

Constructor Summary

TraceVisitor(MTrace trace)

Method Summary

TreeNode[]	getParents(Tree tree, TreeNode node) Get a list of parents for the current node applying correct activity semantics.
boolean	prefix() Whether to visit prior to visiting parent/children.
void	reset(Tree tree) Reset the visitor for a new pass over the tree.
java.lang.Object	visitUp(Tree tree, TreeNode node) Visit the current node prior to visiting parent.

Methods inherited from class mwalk.visitor.AbstractVisitor

again, cfgBoolean, cfgInt, cfgString, cfgVisitor, evaluator, evaluator, getChildren, getReceivers, haveSeen, haveVisited, init, markSeen, markVisited, nextReceiver, postfix, verbose, visitDown, visitDown, visitUp, walkDown, walkUp

Methods inherited from class java.lang.Object

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

Field Detail

trace

protected MTrace trace

Associated mtrace object

hop

protected int hop

Current hop count

parent

TreeNode parent

Reference to parent node

Constructor Detail

TraceVisitor

public TraceVisitor(MTrace trace)
             throws BuildException

Method Detail

prefix

public boolean prefix()

Whether to visit prior to visiting parent/children.

Overrides:

prefix in class AbstractVisitor

Returns:

boolean whether to visit prior

reset

public void reset(Tree tree)

Reset the visitor for a new pass over the tree.

Overrides:

reset in class AbstractVisitor

Parameters:

Tree - vistited tree

visitUp

public java.lang.Object visitUp(Tree tree,
                                TreeNode node)
                         throws VisitException

Visit the current node prior to visiting parent.

Specified by:

visitUp in interface UpVisitor

Overrides:

visitUp in class AbstractVisitor

Parameters:

Tree - current tree instance

TreeNode - current node

Returns:

Object optional return value to pass back along the path

Throws:

VisitException - if a problem ocurred during visit

getParents

public TreeNode[] getParents(Tree tree,
                             TreeNode node)

Get a list of parents for the current node applying correct activity semantics.

Specified by:

getParents in interface UpVisitor

Overrides:

getParents in class AbstractVisitor

Parameters:

Tree - current tree instance

TreeNode - current node

Returns:

TreeNode[] array of parent nodes of currently visited node