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/*******************************************************************************
* Copyright (c) 2007, 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.utility.internal.model.value;
import java.util.Arrays;
import java.util.Iterator;
import java.util.ListIterator;
import org.eclipse.jpt.utility.internal.ArrayTools;
import org.eclipse.jpt.utility.internal.iterators.ArrayIterator;
import org.eclipse.jpt.utility.internal.iterators.ArrayListIterator;
import org.eclipse.jpt.utility.internal.model.AbstractModel;
import org.eclipse.jpt.utility.model.value.ListValueModel;
/**
* Implementation of {@link ListValueModel} that can be used for
* returning a list iterator on a static list, but still allows listeners to be added.
* Listeners will <em>never</em> be notified of any changes, because there should be none.
*/
public class StaticListValueModel<E>
extends AbstractModel
implements ListValueModel<E>
{
/** The elements. */
protected final Object[] elements;
private static final long serialVersionUID = 1L;
/**
* Construct a static list value model for the specified elements.
*/
public StaticListValueModel(E... elements) {
super();
this.elements = elements.clone();
}
/**
* Construct a static list value model for the specified elements.
*/
public StaticListValueModel(Iterable<? extends E> elements) {
super();
this.elements = ArrayTools.array(elements);
}
// ********** ListValueModel implementation **********
@SuppressWarnings("unchecked")
public Iterator<E> iterator() {
// we can cast here since our constructors require the elements to be
// of type E and ArrayIterator is read-only
return (Iterator<E>) new ArrayIterator<Object>(this.elements);
}
@SuppressWarnings("unchecked")
public ListIterator<E> listIterator() {
// we can cast here since our constructors require the elements to be
// of type E and ArrayListIterator is read-only
return (ListIterator<E>) new ArrayListIterator<Object>(this.elements);
}
public int size() {
return this.elements.length;
}
@SuppressWarnings("unchecked")
public E get(int index) {
// we can cast here since our constructors require the elements to be
// of type E
return (E) this.elements[index];
}
public Object[] toArray() {
return this.elements.clone();
}
// ********** Object overrides **********
@Override
public void toString(StringBuilder sb) {
sb.append(Arrays.toString(this.elements));
}
}
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