| /* |
| * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.oracle.java.testlibrary; |
| |
| import java.lang.management.RuntimeMXBean; |
| import java.lang.management.ManagementFactory; |
| import java.util.List; |
| |
| /** |
| * This class provides access to the input arguments to the VM. |
| */ |
| public class InputArguments { |
| private static final List<String> args; |
| |
| static { |
| RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean(); |
| args = runtimeMxBean.getInputArguments(); |
| } |
| |
| /** |
| * Returns true if {@code arg} is an input argument to the VM. |
| * |
| * This is useful for checking boolean flags such as -XX:+UseSerialGC or |
| * -XX:-UsePerfData. |
| * |
| * @param arg The name of the argument. |
| * @return {@code true} if the given argument is an input argument, |
| * otherwise {@code false}. |
| */ |
| public static boolean contains(String arg) { |
| return args.contains(arg); |
| } |
| |
| /** |
| * Returns true if {@code prefix} is the start of an input argument to the |
| * VM. |
| * |
| * This is useful for checking if flags describing a quantity, such as |
| * -XX:+MaxMetaspaceSize=100m, is set without having to know the quantity. |
| * To check if the flag -XX:MaxMetaspaceSize is set, use |
| * {@code InputArguments.containsPrefix("-XX:MaxMetaspaceSize")}. |
| * |
| * @param prefix The start of the argument. |
| * @return {@code true} if the given argument is the start of an input |
| * argument, otherwise {@code false}. |
| */ |
| public static boolean containsPrefix(String prefix) { |
| for (String arg : args) { |
| if (arg.startsWith(prefix)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |