1 /*

     2  * Copyright (c) 1997, 2015, 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 

    33 package jdk.test.lib.hprof.util;

    34 

    35 import java.util.Enumeration;

    36 import java.util.NoSuchElementException;

    37 import jdk.test.lib.hprof.model.JavaHeapObject;

    38 

    39 public 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 }