1/* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 27/* 28 * The Original Code is HAT. The Initial Developer of the 29 * Original Code is Bill Foote, with contributions from others 30 * at JavaSoft/Sun. 31 */ 32 33package jdk.test.lib.hprof.util; 34 35import java.util.Enumeration; 36import java.util.NoSuchElementException; 37import jdk.test.lib.hprof.model.JavaHeapObject; 38 39public class CompositeEnumeration implements Enumeration<JavaHeapObject> { 40 Enumeration<JavaHeapObject> e1; 41 Enumeration<JavaHeapObject> e2; 42 43 public CompositeEnumeration(Enumeration<JavaHeapObject> e1, Enumeration<JavaHeapObject> e2) { 44 this.e1 = e1; 45 this.e2 = e2; 46 } 47 48 public boolean hasMoreElements() { 49 return e1.hasMoreElements() || e2.hasMoreElements(); 50 } 51 52 public JavaHeapObject nextElement() { 53 if (e1.hasMoreElements()) { 54 return e1.nextElement(); 55 } 56 57 if (e2.hasMoreElements()) { 58 return e2.nextElement(); 59 } 60 61 throw new NoSuchElementException(); 62 } 63} 64