org.apache.ojb.odmg.collections
Class DListIterator_2

java.lang.Object
  org.apache.ojb.odmg.collections.DListIterator_2

All Implemented Interfaces:

java.util.Iterator, java.util.ListIterator

class DListIterator_2

extends java.lang.Object

implements java.util.ListIterator

Insert the type's description here. Creation date: (09.02.2001 15:49:39)

Version:

$Id: DListIterator_2.java,v 1.1 2003/08/06 00:20:13 arminw Exp $

Author:

Thomas Mahler, Armin Waibel

Field Summary

protected java.util.ListIterator

iter

Constructor Summary

DListIterator_2(DListImpl_2 list)
DListIterator constructor comment.

DListIterator_2(DListImpl_2 list, int index)
DListIterator constructor comment.

Method Summary

void	add(java.lang.Object obj) Inserts the specified element into the list (optional operation).
boolean	hasNext() Returns true if the iteration has more elements.
boolean	hasPrevious() Returns true if this list iterator has more elements when traversing the list in the reverse direction.
java.lang.Object	next() Returns the next element in the interation.
int	nextIndex() Returns the index of the element that would be returned by a subsequent call to next.
java.lang.Object	previous() Returns the previous element in the list.
int	previousIndex() Returns the index of the element that would be returned by a subsequent call to previous.
void	remove() Removes from the underlying collection the last element returned by the iterator (optional operation).
void	set(java.lang.Object o) Replaces the last element returned by next or previous with the specified element (optional operation).

Methods inherited from class java.lang.Object

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

Field Detail

iter

protected java.util.ListIterator iter

Constructor Detail

DListIterator_2

public DListIterator_2(DListImpl_2 list)

DListIterator constructor comment.

DListIterator_2

public DListIterator_2(DListImpl_2 list,
                       int index)

DListIterator constructor comment.

Method Detail

add

public void add(java.lang.Object obj)

Inserts the specified element into the list (optional operation). The element is inserted immediately before the next element that would be returned by next, if any, and after the next element that would be returned by previous, if any. (If the list contains no elements, the new element becomes the sole element on the list.) The new element is inserted before the implicit cursor: a subsequent call to next would be unaffected, and a subsequent call to previous would return the new element. (This call increases by one the value that would be returned by a call to nextIndex or previousIndex.)

Specified by:

add in interface java.util.ListIterator

Throws:

java.lang.UnsupportedOperationException - if the add method is not supported by this list iterator.

java.lang.ClassCastException - if the class of the specified element prevents it from being added to this Set.

java.lang.IllegalArgumentException - if some aspect of this element prevents it from being added to this Collection.

hasNext

public boolean hasNext()

Returns true if the iteration has more elements. (In other words, returns true if next would return an element rather than throwing an exception.)

Specified by:

hasNext in interface java.util.ListIterator

Returns:

true if the iterator has more elements.

hasPrevious

public boolean hasPrevious()

Returns true if this list iterator has more elements when traversing the list in the reverse direction. (In other words, returns true if previous would return an element rather than throwing an exception.)

Specified by:

hasPrevious in interface java.util.ListIterator

Returns:

true if the list iterator has more elements when traversing the list in the reverse direction.

next

public java.lang.Object next()

Returns the next element in the interation.

Specified by:

next in interface java.util.ListIterator

Returns:

the next element in the interation.

Throws:

NoSuchElementException - iteration has no more elements.

nextIndex

public int nextIndex()

Returns the index of the element that would be returned by a subsequent call to next. (Returns list size if the list iterator is at the end of the list.)

Specified by:

nextIndex in interface java.util.ListIterator

Returns:

the index of the element that would be returned by a subsequent call to next, or list size if list iterator is at end of list.

previous

public java.lang.Object previous()

Returns the previous element in the list. This method may be called repeatedly to iterate through the list 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.)

Specified by:

previous in interface java.util.ListIterator

Returns:

the previous element in the list.

Throws:

NoSuchElementException - if the iteration has no previous element.

previousIndex

public int previousIndex()

Returns the index of the element that would be returned by a subsequent call to previous. (Returns -1 if the list iterator is at the beginning of the list.)

Specified by:

previousIndex in interface java.util.ListIterator

Returns:

the index of the element that would be returned by a subsequent call to previous, or -1 if list iterator is at beginning of list.

remove

public void remove()

Removes from the underlying collection the last element returned by the iterator (optional operation). This method can be called only once per call to next. The behavior of an iterator is unspecified if the underlying collection is modified while the iteration is in progress in any way other than by calling this method.

Specified by:

remove in interface java.util.ListIterator

Throws:

java.lang.UnsupportedOperationException - if the remove operation is not supported by this Iterator.

java.lang.IllegalStateException - if the next method has not yet been called, or the remove method has already been called after the last call to the next method.

set

public void set(java.lang.Object o)

Replaces the last element returned by next or previous with the specified element (optional operation). This call can be made only if neither ListIterator.remove nor ListIterator.add have been called after the last call to next or previous.

Specified by:

set in interface java.util.ListIterator

Throws:

java.lang.UnsupportedOperationException - if the set operation is not supported by this list iterator.

java.lang.ClassCastException - if the class of the specified element prevents it from being added to this list.

java.lang.IllegalArgumentException - if some aspect of the specified element prevents it from being added to this list.

java.lang.IllegalStateException - if neither next nor previous have been called, or remove or add have been called after the last call to next or previous.