i dont think anyone is working for me i just found what seems to be a
very big bug in gwt since for some reason its not possible to
implement the list interface and i belive it is a potential problem
for alot of people other then me
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
public class SmartQueue<T> implements List<T>{
protected ArrayList<T> m_items;
protected int m_Limit=-1;
/**
* constructor
* @param lim = limit of queue to set
*/
public SmartQueue()
{
}
public SmartQueue(int lim)
{
m_Limit=lim;
}
/**
* Enqueue a member into head of queue
* @param val-val to insert
*/
public T Enqueue(T val)
{
m_items.add(0, val);
return (m_Limit>0 && m_items.size()>m_Limit) ? Dequeue() : null;
}
/**
* Enqueue a member into a chosen pos at the queue
* @param val-val to insert
*/
public T Enqueue(T val,int at)
{
m_items.add(at, val);
return (m_Limit>0 && m_items.size()>m_Limit) ? Dequeue() : null;
}
/**
* Enqueue a member into head of queue
* @param val-val to insert
*/
public Collection<T> Enqueue(Collection<? extends T> coll)
{
m_items.addAll(0, coll);
if(m_Limit>0 && m_items.size()>m_Limit)
{
return Dequeue(m_items.size() - m_Limit);
}
return null;
}
/**
* Enqueue a member into head of queue
* @param val-val to insert
*/
public Collection<T> Enqueue(Collection<? extends T> coll,int at)
{
m_items.addAll(at, coll);
if(m_Limit>0 && m_items.size()>m_Limit)
{
return Dequeue(m_items.size() - m_Limit);
}
return null;
}
/**
* Dequeue a member from tail end of queue
* @return T - the member of the queue that was removed
*/
public T Dequeue()
{
int end = m_items.size()-1;
T res = m_items.get(end);
m_items.remove(end);
return res;
}
/**
* Dequeue a member list from tail end of queue
* @return T - the member of the queue that was removed
*/
public Collection<T> Dequeue(int count)
{
Collection<T>res = new ArrayList<T>();
for (int i = m_items.size()-count; i < m_items.size(); i++) {
res.add(get(i));
m_items.remove(i);
}
return res;
}
/**
* get the maximum capacity of the queue
* @return maximum capacity of the queue
*/
public int GetLimit()
{
return m_Limit;
}
/**
* sets maximum capacity of the queue
* @param lim-the limit of the queue to set
*/
public void SetLimit(int lim)
{
m_Limit=lim;
}
public void SetItemPosition(int from,int to)
{
if(from >0 && from < m_items.size()&& to >0 && to <
m_items.size())
{
Collections.swap(m_items, from, to);
}
}
private Collection<T> GetAndRemoveOverLimit()
{
if(m_Limit>0 && m_items.size()>m_Limit)
{
return Dequeue(m_items.size() - m_Limit);
}
return null;
}
private void RemoveOverLimit()
{
if(m_Limit>0 && m_items.size()>m_Limit)
{
Dequeue(m_items.size() - m_Limit);
}
}
@Override
public boolean add(T e) {
boolean res = m_items.add(e);
RemoveOverLimit();
return res;
}
@Override
public void add(int index, T element) {
RemoveOverLimit();
m_items.add(index,element);
}
@Override
public boolean addAll(Collection<? extends T> c) {
boolean res =addAll(c);
RemoveOverLimit();
return res;
}
@Override
public boolean addAll(int index, Collection<? extends T> c) {
boolean res =addAll(index,c);
RemoveOverLimit();
return res;
}
@Override
public void clear() {
m_items.clear();
}
@Override
public boolean contains(Object o) {
return m_items.contains(o);
}
@Override
public boolean containsAll(Collection<?> c) {
// TODO Auto-generated method stub
return m_items.containsAll(c);
}
@Override
public T get(int index) {
// TODO Auto-generated method stub
return m_items.get(index);
}
@Override
public int indexOf(Object o) {
// TODO Auto-generated method stub
return m_items.indexOf(o);
}
@Override
public boolean isEmpty() {
// TODO Auto-generated method stub
return m_items.isEmpty();
}
@Override
public Iterator<T> iterator() {
return m_items.iterator();
}
@Override
public int lastIndexOf(Object o) {
return m_items.lastIndexOf(o);
}
@Override
public ListIterator<T> listIterator() {
// TODO Auto-generated method stub
return m_items.listIterator();
}
@Override
public ListIterator<T> listIterator(int index) {
// TODO Auto-generated method stub
return m_items.listIterator(index);
}
@Override
public boolean remove(Object o) {
return m_items.remove(o);
}
@Override
public T remove(int index) {
// TODO Auto-generated method stub
return m_items.get(index);
}
@Override
public boolean removeAll(Collection<?> c) {
// TODO Auto-generated method stub
return m_items.removeAll(c);
}
@Override
public boolean retainAll(Collection<?> c) {
// TODO Auto-generated method stub
return m_items.retainAll(c);
}
@Override
public T set(int index, T element) {
// TODO Auto-generated method stub
return m_items.set(index, element);
}
@Override
public int size() {
// TODO Auto-generated method stub
return m_items.size();
}
@Override
public List<T> subList(int fromIndex, int toIndex) {
return m_items.subList(fromIndex, toIndex);
}
@Override
public Object[] toArray() {
return m_items.toArray();
}
@Override
public <T> T[] toArray(T[] a) {
// TODO Auto-generated method stub
return m_items.toArray(a);
}
}
On 23 נובמבר, 14:49, Lothar Kimmeringer <[email protected]> wrote:
> ben fenster schrieb:
>
> > i know !!!
>
> So why do you try to create a subclass of an interface?
>
> > but when i try to implement it
>
> Implement != subclass.
>
> > and the compile it i get a general
> > error saying my main module cant be loaded
>
> You try to compile it for deployment or are we talking about
> the hosted mode? if the latter, what's the error-message
> showing up in the details-pane if you click on the main-entry
>
> > so baby ! show me any class you create that inherites from List and of
> > course compile it !
>
> I come to the impression that you think that I'm some kind
> of support-guy you have the right to use for free. That's
> not the case, so please work on your way of asking questions:
>
> - Don't use exclamation and question marks excessively
> - Give as much information as possible to be able to
> reproduce or at least understand your problem
> - Don't forget: It's you, who want to be helped, so ask
> in a way motivating as much people as possible to
> help you.
>
> I never needed to create a new implementation of java.util.List
> but alway use ArrayList for the client side of the application.
> Most likely java.util.List is not part of the client JRE that
> is converted to Javascript leading to the error (but that's just
> a guess, the error-message in the details-pane should clearify
> that).
>
> Regards, Lothar
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