2ba5f77454
* All files: Updated copyright information. * COPYING: New file. * COPYING.LIB: Removed. * LIBGCJ_LICENSE: We now use GPL + special exception. From-SVN: r32387
53 lines
1.2 KiB
Java
53 lines
1.2 KiB
Java
/* Copyright (C) 1999 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package gnu.gcj.util;
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import java.util.Enumeration;
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import java.util.NoSuchElementException;
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public class EnumerationChain implements Enumeration
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{
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private Enumeration first_;
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private Enumeration second_;
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public EnumerationChain (Enumeration first, Enumeration second)
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{
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if (first == null
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|| second == null)
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throw new NullPointerException();
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first_ = first;
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second_ = second;
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}
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public synchronized boolean hasMoreElements()
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{
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if (first_ == null)
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return false;
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else
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return first_.hasMoreElements();
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}
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public synchronized Object nextElement() throws NoSuchElementException
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{
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while (first_ != null)
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{
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if (! first_.hasMoreElements())
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{
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first_ = second_;
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second_ = null;
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}
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else
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return first_.nextElement();
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}
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throw new NoSuchElementException();
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}
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}
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