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/*
* Copyright (c) 2006 Israfil Consulting Services Corporation
* Copyright (c) 2006 Christian Edward Gruber
* All Rights Reserved
*
* This software is licensed under the Berkeley Standard Distribution license,
* (BSD license), as defined below:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of Israfil Consulting Services nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* $Id: ArraySet.java 19 2006-01-30 21:52:52Z cgruber $
*/
package net.israfil.foundation.collections;
import java.util.AbstractCollection;
import java.util.Iterator;
/**
* A simple unmodifyable implementation of Collection that takes a single (possibly
* null) constructor parameter. The collection then "contains" this single object.
*
* @author <a href="mailto:cgruber@israfil.net">Christian Edward Gruber </a>
*/
//@Copyright(years={"2006"},owner="Israfil Consulting Services Corporation",license="BSD")
public class SoloCollection<E> extends AbstractCollection<E> {
protected final E o;
public SoloCollection(E o) {
super();
this.o = o;
}
public Iterator<E> iterator() {
return new Iterator<E>() {
boolean beforeFirst = true;
public boolean hasNext() { return beforeFirst; }
public E next() { beforeFirst = false; return o; }
public void remove() {
throw new UnsupportedOperationException("Cannot remove from a singleton colelction");
}
};
}
public int size() { return 1; }
}
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