1 /*
2 * Copyright (c) 2013, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 package jdk.testlibrary;
25
26 import java.lang.management.RuntimeMXBean;
27 import java.lang.management.ManagementFactory;
28 import java.util.List;
29
30 /**
31 * This class provides access to the input arguments to the VM.
32 */
33 public class InputArguments {
34 private static final List<String> args;
35
36 static {
37 RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
38 args = runtimeMxBean.getInputArguments();
39 }
40
41 /**
42 * Returns true if {@code arg} is an input argument to the VM.
43 *
44 * This is useful for checking boolean flags such as -XX:+UseSerialGC or
48 * @return {@code true} if the given argument is an input argument,
49 * otherwise {@code false}.
50 */
51 public static boolean contains(String arg) {
52 return args.contains(arg);
53 }
54
55 /**
56 * Returns true if {@code prefix} is the start of an input argument to the
57 * VM.
58 *
59 * This is useful for checking if flags describing a quantity, such as
60 * -XX:+MaxMetaspaceSize=100m, is set without having to know the quantity.
61 * To check if the flag -XX:MaxMetaspaceSize is set, use
62 * {@code InputArguments.containsPrefix("-XX:MaxMetaspaceSize")}.
63 *
64 * @param prefix The start of the argument.
65 * @return {@code true} if the given argument is the start of an input
66 * argument, otherwise {@code false}.
67 */
68 public static boolean containsPrefix(String prefix) {
69 for (String arg : args) {
70 if (arg.startsWith(prefix)) {
71 return true;
72 }
73 }
74 return false;
75 }
76
77 /**
78 * Get the string containing input arguments passed to the VM
79 */
80 public static String getInputArguments() {
81 StringBuilder result = new StringBuilder();
82 for (String arg : args)
83 result.append(arg).append(' ');
84
85 return result.toString();
86 }
87
88 }
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1 /*
2 * Copyright (c) 2013, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 package jdk.testlibrary.management;
25
26 import java.lang.management.RuntimeMXBean;
27 import java.lang.management.ManagementFactory;
28 import java.util.List;
29
30 /**
31 * This class provides access to the input arguments to the VM.
32 */
33 public class InputArguments {
34 private static final List<String> args;
35
36 static {
37 RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
38 args = runtimeMxBean.getInputArguments();
39 }
40
41 /**
42 * Returns true if {@code arg} is an input argument to the VM.
43 *
44 * This is useful for checking boolean flags such as -XX:+UseSerialGC or
48 * @return {@code true} if the given argument is an input argument,
49 * otherwise {@code false}.
50 */
51 public static boolean contains(String arg) {
52 return args.contains(arg);
53 }
54
55 /**
56 * Returns true if {@code prefix} is the start of an input argument to the
57 * VM.
58 *
59 * This is useful for checking if flags describing a quantity, such as
60 * -XX:+MaxMetaspaceSize=100m, is set without having to know the quantity.
61 * To check if the flag -XX:MaxMetaspaceSize is set, use
62 * {@code InputArguments.containsPrefix("-XX:MaxMetaspaceSize")}.
63 *
64 * @param prefix The start of the argument.
65 * @return {@code true} if the given argument is the start of an input
66 * argument, otherwise {@code false}.
67 */
68 public static boolean hasArgStartingWith(String prefix) {
69 for (String arg : args) {
70 if (arg.startsWith(prefix)) {
71 return true;
72 }
73 }
74 return false;
75 }
76
77 /**
78 * Get the string containing input arguments passed to the VM
79 */
80 public static String getInputArguments() {
81 StringBuilder result = new StringBuilder();
82 for (String arg : args)
83 result.append(arg).append(' ');
84
85 return result.toString();
86 }
87
88 }
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