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package java.util;
/**
* Title:
* Description:
* Copyright: Copyright (c) 2001
* Company:
* @version 1.0
*/
public abstract class AbstractList extends AbstractCollection implements List
{
protected AbstractList al = this;
protected AbstractList()
{
}
public boolean add(Object o) throws UnsupportedOperationException, ClassCastException, IllegalArgumentException
{
try
{
add(size(),o);
return true;
}
catch(UnsupportedOperationException ue)
{
throw ue;
}
}
public abstract Object get(int index) throws IndexOutOfBoundsException;
public Object set(int index,Object element) throws UnsupportedOperationException, ClassCastException, IllegalArgumentException, IndexOutOfBoundsException
{
throw new UnsupportedOperationException();
}
public void add(int index,Object element) throws UnsupportedOperationException, ClassCastException, IllegalArgumentException, IndexOutOfBoundsException
{
throw new UnsupportedOperationException();
}
public Object remove(int index) throws UnsupportedOperationException, IndexOutOfBoundsException
{
Object o = get(index);
removeRange(index,index+1);
return o;
}
public int indexOf(Object o)
{
ListIterator li = listIterator();
Object e;
while(li.hasNext())
{
int index=li.nextIndex();
e=li.next();
System.out.println(e);
if(o==null)
{
if(e==null)
return index;
}
else
{
if(o.equals(e))
return index;
}
}
return -1;
}
public int lastIndexOf(Object o)
{
ListIterator li=listIterator(size());
while(li.hasPrevious())
{
int index=li.previousIndex();
Object e=li.previous();
if(o==null)
{
if(e==null)
return index;
}
else
{
if(o.equals(e))
return index;
}
}
return -1;
}
public void clear() throws UnsupportedOperationException
{
try
{
removeRange(0,size());
}
catch(UnsupportedOperationException ue)
{
throw ue;
}
}
public boolean addAll(int index,Collection c) throws UnsupportedOperationException, ClassCastException, IllegalArgumentException, IndexOutOfBoundsException
{
Iterator it=c.iterator();
boolean ret=false;
while(it.hasNext())
{
try
{
add(index++,it.next());
ret=true;
}
catch(UnsupportedOperationException ue)
{
throw ue;
}
}
return ret;
}
public Iterator iterator()
{
return new AbstractListIterator(this,0);
}
public ListIterator listIterator()
{
return listIterator(0);
}
public ListIterator listIterator(int index) throws IndexOutOfBoundsException
{
if(index<0||index>size()) throw new IndexOutOfBoundsException();
return new AbstractListListIterator(this,index);
}
public List subList(int fromIndex,int toIndex) throws IndexOutOfBoundsException,IllegalArgumentException
{
if(fromIndex < 0 || toIndex > size())
throw new IndexOutOfBoundsException();
if(fromIndex>toIndex)
throw new IllegalArgumentException();
return (List) new Sublist(this,fromIndex,toIndex);
}
public boolean equals(Object o)
{
if(o==this)
return true;
if(!(o instanceof List))
return false;
Iterator it1=iterator();
Iterator it2=((List)o).iterator();
while(it1.hasNext())
{
if(!it2.hasNext())
return false;
Object e1=it1.next();
Object e2=it2.next();
if(e1==null)
{
if(e2!=null)
return false;
}
if(!e1.equals(e2))
return false;
}
return true;
}
public int hashCode()
{
int hashCode = 1;
Iterator it = iterator();
while (it.hasNext())
{
Object o = it.next();
hashCode = 31*hashCode + (o==null ? 0 : o.hashCode());
}
return hashCode;
}
protected void removeRange(int fromIndex,int toIndex)
{
System.out.println("breakpoint 1");
if(fromIndex==toIndex) return;
System.out.println("breakpoint 2");
ListIterator li=listIterator(fromIndex);
System.out.println("breakpoint 3");
int i=fromIndex;
do
{
li.next();
li.remove();
i++;
}while(li.hasNext()&&i<toIndex);
}
////////////////////////////////////////////////////////////
/////////////innere Klasse AbstractIterator/////////////////
////////////////////////////////////////////////////////////
private class AbstractListIterator implements Iterator
{
AbstractList m_al=null;
int m_nextIndex=0;
public AbstractListIterator(AbstractList al,int index)
{
m_al=al;
m_nextIndex=index;
}
public boolean hasNext()
{
return m_nextIndex < m_al.size();
}
public Object next()
{
return m_al.get(m_nextIndex++);
}
public void remove()
{
m_al.remove(m_nextIndex - 1);
}
}
///////////////////////////////////////////////////////////////////////////////
//////////// innere Klasse AbstraktListListIterator
///////////////////////////////////////////////////////////////////////////////
private class AbstractListListIterator extends AbstractListIterator implements ListIterator
{
public AbstractListListIterator(AbstractList al,int index)
{
super(al,index);
}
public boolean hasPrevious()
{
return m_nextIndex>0;
}
public Object previous()// throws NoSuchElementException;
{
return m_al.get(--m_nextIndex);
}
public int nextIndex()
{
return m_nextIndex;
}
public int previousIndex()
{
return m_nextIndex-1;
}
public void set(Object o) //throws UnsupportedOperationException, ClassCastException, IllegalArgumentException,IllegalStateException;
{
m_al.set(m_nextIndex-1,o);
}
public void add(Object o)// throws UnsupportedOperationException, ClassCastException, IllegalArgumentException;
{
m_al.add(m_nextIndex-1,o);
}
}
}
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