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/*******************************************************************************
* Copyright (c) 2007, 2008 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.Collection;
import java.util.Iterator;
import org.eclipse.jpt.utility.internal.StringTools;
import org.eclipse.jpt.utility.internal.iterators.ReadOnlyIterator;
import org.eclipse.jpt.utility.internal.model.AbstractModel;
import org.eclipse.jpt.utility.model.value.CollectionValueModel;
/**
* Implementation of CollectionValueModel that can be used for
* returning an iterator on a static collection, but still allows listeners to be added.
* Listeners will NEVER be notified of any changes, because there should be none.
*/
public class StaticCollectionValueModel<E>
extends AbstractModel
implements CollectionValueModel<E>
{
/** The collection. */
protected final Collection<? extends E> collection;
private static final long serialVersionUID = 1L;
/**
* Construct a static CollectionValueModel for the specified collection.
*/
public StaticCollectionValueModel(Collection<? extends E> collection) {
super();
if (collection == null) {
throw new NullPointerException();
}
this.collection = collection;
}
// ********** CollectionValueModel implementation **********
public int size() {
return this.collection.size();
}
public Iterator<E> iterator() {
return new ReadOnlyIterator<E>(this.collection.iterator());
}
// ********** Object overrides **********
@Override
public String toString() {
return StringTools.buildToStringFor(this, this.collection);
}
}
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