325N/A/*
325N/A * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
325N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
325N/A *
325N/A * This code is free software; you can redistribute it and/or modify it
325N/A * under the terms of the GNU General Public License version 2 only, as
325N/A * published by the Free Software Foundation. Oracle designates this
325N/A * particular file as subject to the "Classpath" exception as provided
325N/A * by Oracle in the LICENSE file that accompanied this code.
325N/A *
325N/A * This code is distributed in the hope that it will be useful, but WITHOUT
325N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
325N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
325N/A * version 2 for more details (a copy is included in the LICENSE file that
325N/A * accompanied this code).
325N/A *
325N/A * You should have received a copy of the GNU General Public License version
325N/A * 2 along with this work; if not, write to the Free Software Foundation,
325N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
325N/A *
325N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
325N/A * or visit www.oracle.com if you need additional information or have any
325N/A * questions.
325N/A */
325N/A
325N/Apackage com.sun.tools.internal.xjc.reader.gbind;
325N/A
325N/Aimport java.util.Collections;
325N/Aimport java.util.Iterator;
325N/A
325N/A/**
325N/A * A set over a list of {@link Element}.
325N/A *
325N/A * @author Kohsuke Kawaguchi
325N/A */
325N/Ainterface ElementSet extends Iterable<Element> {
325N/A /**
325N/A * For each element in this set, adds an edge to the given element.
325N/A */
325N/A void addNext(Element element);
325N/A
325N/A public static final ElementSet EMPTY_SET = new ElementSet() {
325N/A public void addNext(Element element) {
325N/A // noop
325N/A }
325N/A
325N/A public boolean contains(ElementSet element) {
325N/A return this==element;
325N/A }
325N/A
325N/A public Iterator<Element> iterator() {
325N/A return Collections.<Element>emptySet().iterator();
325N/A }
325N/A };
325N/A
325N/A /**
325N/A * Doesn't have to be strict (it's OK for this method to return false
325N/A * when it's actually true) since this is used just for optimization.
325N/A *
325N/A * (Erring on the other side is NG)
325N/A */
325N/A boolean contains(ElementSet rhs);
325N/A}