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/*******************************************************************************
* Copyright (c) 2010 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.internal.iterators;
import java.util.List;
import java.util.ListIterator;
import org.eclipse.jpt.common.utility.internal.StringTools;
import org.eclipse.jpt.common.utility.internal.iterables.ListIterable;
/**
* Wrap a list iterator on elements of type <code>E1</code>, converting it into
* a list iterator on elements of type <code>E2</code>. Assume the wrapped
* list iterator returns only elements of type <code>E2</code>.
*
* @param <E1> input: the type of elements returned by the wrapped list iterator
* @param <E2> output: the type of elements returned by the list iterator
*
* @see org.eclipse.jpt.common.utility.internal.iterables.SubListIterableWrapper
*/
public class SubListIteratorWrapper<E1, E2>
implements ListIterator<E2>
{
private final ListIterator<E1> listIterator;
public SubListIteratorWrapper(List<E1> list) {
this(list.listIterator());
}
public SubListIteratorWrapper(ListIterable<E1> listIterable) {
this(listIterable.iterator());
}
public SubListIteratorWrapper(ListIterator<E1> iterator) {
super();
this.listIterator = iterator;
}
public boolean hasNext() {
return this.listIterator.hasNext();
}
@SuppressWarnings("unchecked")
public E2 next() {
return (E2) this.listIterator.next();
}
public int nextIndex() {
return this.listIterator.nextIndex();
}
public boolean hasPrevious() {
return this.listIterator.hasPrevious();
}
@SuppressWarnings("unchecked")
public E2 previous() {
return (E2) this.listIterator.previous();
}
public int previousIndex() {
return this.listIterator.previousIndex();
}
public void remove() {
this.listIterator.remove();
}
public void set(E2 e) {
throw new UnsupportedOperationException();
}
public void add(E2 e) {
throw new UnsupportedOperationException();
}
@Override
public String toString() {
return StringTools.buildToStringFor(this, this.listIterator);
}
}
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