/*
* Copyright (c) 1998-2002 Carnegie Mellon University. All rights
* reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
* ANY EXPRESSED 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 CARNEGIE MELLON UNIVERSITY
* NOR ITS EMPLOYEES 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.
*
*/
package rcm.enum;
import java.util.Enumeration;
import java.util.NoSuchElementException;
/**
* Enumeration of an arbitrary array.
*/
public class ArrayEnumeration implements Enumeration {
Object[] array;
int i = 0;
/**
* Make an ArrayEnumeration.
* @param array Array to enumerate. May be null, if desired.
* (This is sometimes useful for producing an empty enumeration.)
*/
public ArrayEnumeration (Object[] array) {
this.array = array;
}
/**
* Test if enumeration has reached end.
* @return true if more elements are available to be enumerated, false
* if all elements have been yielded by nextElement()
*/
public boolean hasMoreElements () {
return array != null ? i < array.length : false;
}
/**
* Get next element of enumeration.
* @return next element of enumeration, advancing the enumeration pointer
* @exception java.util.NoSuchElementException if no more elements
*/
public Object nextElement () {
if (array == null || i >= array.length)
throw new NoSuchElementException ();
return array[i++];
}
}
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