Package org.antlr.runtime.tree

Class TreeIterator

java.lang.Object

org.antlr.runtime.tree.TreeIterator

All Implemented Interfaces:

Iterator<Object>

public class TreeIterator
extends Object
implements Iterator<Object>

Return a node stream from a doubly-linked tree whose nodes know what child index they are. No remove() is supported. Emit navigation nodes (DOWN, UP, and EOF) to let show tree structure.

Field Summary

Fields

Modifier and Type	Field	Description
protected TreeAdaptor	adaptor
Object	down
Object	eof
protected boolean	firstTime
protected FastQueue<Object>	nodes	If we emit UP/DOWN nodes, we need to spit out multiple nodes per next() call.
protected Object	root
protected Object	tree
Object	up

Constructor Summary

Constructors

Constructor	Description
TreeIterator(Object tree)
TreeIterator(TreeAdaptor adaptor, Object tree)

Method Summary

Modifier and Type	Method	Description
boolean	hasNext()
Object	next()
void	remove()
void	reset()

Methods inherited from interface java.util.Iterator

forEachRemaining

Methods inherited from class java.lang.Object

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

Field Detail

adaptor

protected TreeAdaptor adaptor

root

protected Object root

tree

protected Object tree

firstTime

protected boolean firstTime

up

public Object up

down

public Object down

eof

public Object eof

nodes

protected FastQueue<Object> nodes

If we emit UP/DOWN nodes, we need to spit out multiple nodes per next() call.

Constructor Detail

TreeIterator

public TreeIterator(Object tree)

TreeIterator

public TreeIterator(TreeAdaptor adaptor,
                    Object tree)

Method Detail

reset

public void reset()

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Object>

next

public Object next()

Specified by:

next in interface Iterator<Object>

remove

public void remove()

Specified by:

remove in interface Iterator<Object>