BidiTreeIterator (org.eclipse.xtext 2.30.0 API)

All Superinterfaces:

BidiIterator<T>, java.util.Iterator<T>, org.eclipse.emf.common.util.TreeIterator<T>

All Known Implementing Classes:

BasicNodeTreeIterator, NodeTreeIterator, ReversedBidiTreeIterator
```
public interface BidiTreeIterator<T>
extends org.eclipse.emf.common.util.TreeIterator<T>, BidiIterator<T>
```
A bidirectional tree iterator. It can be used in both directions and even alternating.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  T next()
  
  T previous()
  Returns the previous element.
  - Methods inherited from interface org.eclipse.xtext.nodemodel.BidiIterator
    hasPrevious
  - Methods inherited from interface java.util.Iterator
    forEachRemaining, hasNext, remove
  - Methods inherited from interface org.eclipse.emf.common.util.TreeIterator
    prune

- Method Detail
  - next
```
T next()
```
    Intermixed calls to next() and previous() may not lead to the very same element since the iterator does not return the parent element when its done with its children but the next sibling of the parent.
    
    Specified by:
    
    next in interface java.util.Iterator<T>
    
    Throws:
    
    java.util.NoSuchElementException - iteration has no next element.
  - previous
```
T previous()
```
    Returns the previous element. This method may be called repeatedly to iterate backwards, or intermixed with calls to next to go back and forth. (Note that alternating calls to next and previous will return the same element repeatedly.)
    Intermixed calls to next() and previous() may not lead to the very same element since the iterator does not return the parent element when its done with its children but the next sibling of the parent.
    
    Specified by:
    
    previous in interface BidiIterator<T>
    
    Returns:
    
    the previous element.
    
    Throws:
    
    java.util.NoSuchElementException - iteration has no previous element.