/* |
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* Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.internal.util; |
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import java.util.Properties; |
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/** |
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* System Property access for internal use only. |
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* Read-only access to System property values initialized during Phase 1 |
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* are cached. Setting, clearing, or modifying the value using |
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* {@link System#setProperty) or {@link System#getProperties()} is ignored. |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in these access methods. The caller of these methods should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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*/ |
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public final class StaticProperty { |
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// The class static initialization is triggered to initialize these final |
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// fields during init Phase 1 and before a security manager is set. |
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private static final String JAVA_HOME; |
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private static final String USER_HOME; |
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private static final String USER_DIR; |
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private static final String USER_NAME; |
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private static final String JAVA_LIBRARY_PATH; |
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private static final String SUN_BOOT_LIBRARY_PATH; |
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private static final String JDK_SERIAL_FILTER; |
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private static final String JDK_SERIAL_FILTER_FACTORY; |
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private static final String JAVA_IO_TMPDIR; |
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private static final String NATIVE_ENCODING; |
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private StaticProperty() {} |
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static { |
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Properties props = System.getProperties(); |
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JAVA_HOME = getProperty(props, "java.home"); |
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USER_HOME = getProperty(props, "user.home"); |
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USER_DIR = getProperty(props, "user.dir"); |
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USER_NAME = getProperty(props, "user.name"); |
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JAVA_IO_TMPDIR = getProperty(props, "java.io.tmpdir"); |
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JAVA_LIBRARY_PATH = getProperty(props, "java.library.path", ""); |
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SUN_BOOT_LIBRARY_PATH = getProperty(props, "sun.boot.library.path", ""); |
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JDK_SERIAL_FILTER = getProperty(props, "jdk.serialFilter", null); |
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JDK_SERIAL_FILTER_FACTORY = getProperty(props, "jdk.serialFilterFactory", null); |
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NATIVE_ENCODING = getProperty(props, "native.encoding"); |
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} |
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private static String getProperty(Properties props, String key) { |
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String v = props.getProperty(key); |
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if (v == null) { |
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throw new InternalError("null property: " + key); |
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} |
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return v; |
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} |
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private static String getProperty(Properties props, String key, |
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String defaultVal) { |
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String v = props.getProperty(key); |
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return (v == null) ? defaultVal : v; |
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} |
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/** |
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* Return the {@code java.home} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code java.home} system property |
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*/ |
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public static String javaHome() { |
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return JAVA_HOME; |
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} |
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/** |
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* Return the {@code user.home} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code user.home} system property |
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*/ |
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public static String userHome() { |
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return USER_HOME; |
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} |
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/** |
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* Return the {@code user.dir} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code user.dir} system property |
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*/ |
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public static String userDir() { |
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return USER_DIR; |
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} |
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/** |
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* Return the {@code user.name} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code user.name} system property |
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*/ |
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public static String userName() { |
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return USER_NAME; |
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} |
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/** |
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* Return the {@code java.library.path} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code java.library.path} system property |
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*/ |
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public static String javaLibraryPath() { |
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return JAVA_LIBRARY_PATH; |
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} |
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/** |
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* Return the {@code java.io.tmpdir} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code java.io.tmpdir} system property |
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*/ |
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public static String javaIoTmpDir() { |
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return JAVA_IO_TMPDIR; |
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} |
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/** |
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* Return the {@code sun.boot.library.path} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code sun.boot.library.path} system property |
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*/ |
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public static String sunBootLibraryPath() { |
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return SUN_BOOT_LIBRARY_PATH; |
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} |
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/** |
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* Return the {@code jdk.serialFilter} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code jdk.serialFilter} system property |
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*/ |
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public static String jdkSerialFilter() { |
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return JDK_SERIAL_FILTER; |
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} |
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/** |
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* Return the {@code jdk.serialFilterFactory} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code jdk.serialFilterFactory} system property |
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*/ |
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public static String jdkSerialFilterFactory() { |
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return JDK_SERIAL_FILTER_FACTORY; |
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} |
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/** |
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* Return the {@code native.encoding} system property. |
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* |
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* <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked |
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* in this method. The caller of this method should take care to ensure |
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* that the returned property is not made accessible to untrusted code.</strong> |
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* |
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* @return the {@code native.encoding} system property |
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*/ |
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public static String nativeEncoding() { |
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return NATIVE_ENCODING; |
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} |
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} |