From 7c279747beb43c7e88633a6228a155a30e6834f7 Mon Sep 17 00:00:00 2001 From: Benjamin Culkin Date: Mon, 27 May 2024 11:38:33 -0400 Subject: Initial import --- .../foundation/collections/SoloCollection.java | 66 ++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 israfil-foundation-collections/src/main/java/net/israfil/foundation/collections/SoloCollection.java (limited to 'israfil-foundation-collections/src/main/java/net/israfil/foundation/collections/SoloCollection.java') diff --git a/israfil-foundation-collections/src/main/java/net/israfil/foundation/collections/SoloCollection.java b/israfil-foundation-collections/src/main/java/net/israfil/foundation/collections/SoloCollection.java new file mode 100644 index 0000000..83a9f66 --- /dev/null +++ b/israfil-foundation-collections/src/main/java/net/israfil/foundation/collections/SoloCollection.java @@ -0,0 +1,66 @@ +/* + * 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 Christian Edward Gruber + */ +//@Copyright(years={"2006"},owner="Israfil Consulting Services Corporation",license="BSD") + +public class SoloCollection extends AbstractCollection { + protected final E o; + public SoloCollection(E o) { + super(); + this.o = o; + } + + public Iterator iterator() { + return new Iterator() { + 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; } +} -- cgit v1.2.3