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| 1 | /* | ||
| 2 | * Copyright (c) 2005, 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 | package sun.misc; | ||
| 26 | |||
| 27 | import java.io.ByteArrayOutputStream; | ||
| 28 | import java.io.IOException; | ||
| 29 | import java.util.Properties; | ||
| 30 | import java.util.Set; | ||
| 31 | import java.util.jar.JarFile; | ||
| 32 | import java.util.jar.Manifest; | ||
| 33 | import java.util.jar.Attributes; | ||
| 34 | |||
| 35 | /* | ||
| 36 | * Support class used by JVMTI and VM attach mechanism. | ||
| 37 | */ | ||
| 38 | public class VMSupport { | ||
| 39 | |||
| 40 | private static Properties agentProps = null; | ||
| 41 | /** | ||
| 42 | * Returns the agent properties. | ||
| 43 | */ | ||
| 44 | public static synchronized Properties getAgentProperties() { | ||
| 45 | if (agentProps == null) { | ||
| 46 | agentProps = new Properties(); | ||
| 47 | initAgentProperties(agentProps); | ||
| 48 | } | ||
| 49 | return agentProps; | ||
| 50 | } | ||
| 51 | private static native Properties initAgentProperties(Properties props); | ||
| 52 | |||
| 53 | /** | ||
| 54 | * Write the given properties list to a byte array and return it. Properties with | ||
| 55 | * a key or value that is not a String is filtered out. The stream written to the byte | ||
| 56 | * array is ISO 8859-1 encoded. | ||
| 57 | */ | ||
| 58 | private static byte[] serializePropertiesToByteArray(Properties p) throws IOException { | ||
| 59 | ByteArrayOutputStream out = new ByteArrayOutputStream(4096); | ||
| 60 | |||
| 61 | Properties props = new Properties(); | ||
| 62 | |||
| 63 | // stringPropertyNames() returns a snapshot of the property keys | ||
| 64 | Set<String> keyset = p.stringPropertyNames(); | ||
| 65 | for (String key : keyset) { | ||
| 66 | String value = p.getProperty(key); | ||
| 67 | props.put(key, value); | ||
| 68 | } | ||
| 69 | |||
| 70 | props.store(out, null); | ||
| 71 | return out.toByteArray(); | ||
| 72 | } | ||
| 73 | |||
| 74 | public static byte[] serializePropertiesToByteArray() throws IOException { | ||
| 75 | return serializePropertiesToByteArray(System.getProperties()); | ||
| 76 | } | ||
| 77 | |||
| 78 | public static byte[] serializeAgentPropertiesToByteArray() throws IOException { | ||
| 79 | return serializePropertiesToByteArray(getAgentProperties()); | ||
| 80 | } | ||
| 81 | |||
| 82 | /* | ||
| 83 | * Returns true if the given JAR file has the Class-Path attribute in the | ||
| 84 | * main section of the JAR manifest. Throws RuntimeException if the given | ||
| 85 | * path is not a JAR file or some other error occurs. | ||
| 86 | */ | ||
| 87 | public static boolean isClassPathAttributePresent(String path) { | ||
| 88 | try { | ||
| 89 | Manifest man = (new JarFile(path)).getManifest(); | ||
| 90 | if (man != null) { | ||
| 91 | if (man.getMainAttributes().getValue(Attributes.Name.CLASS_PATH) != null) { | ||
| 92 | return true; | ||
| 93 | } | ||
| 94 | } | ||
| 95 | return false; | ||
| 96 | } catch (IOException ioe) { | ||
| 97 | throw new RuntimeException(ioe.getMessage()); | ||
| 98 | } | ||
| 99 | } | ||
| 100 | } | ||