001/*
002 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.logging;
024
025import java.util.*;
026
027public final class ProxyUtil {
028
029    public static Class<?>[] getAllInterfaces(Class<?> clazz) {
030        HashSet<Class<?>> interfaces = new HashSet<>();
031        getAllInterfaces(clazz, interfaces);
032        return interfaces.toArray(new Class<?>[interfaces.size()]);
033    }
034
035    private static void getAllInterfaces(Class<?> clazz, HashSet<Class<?>> interfaces) {
036        for (Class<?> iface : clazz.getInterfaces()) {
037            if (!interfaces.contains(iface)) {
038                interfaces.add(iface);
039                getAllInterfaces(iface, interfaces);
040            }
041        }
042        if (clazz.getSuperclass() != null) {
043            getAllInterfaces(clazz.getSuperclass(), interfaces);
044        }
045    }
046}