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The Qbicc builder for the java.base JDK module
/*
* Copyright (c) 2018, 2021, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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 jdk.internal.util;
import java.util.Properties;
/**
* System Property access for internal use only.
* Read-only access to System property values initialized during Phase 1
* are cached. Setting, clearing, or modifying the value using
* {@link System#setProperty) or {@link System#getProperties()} is ignored.
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in these access methods. The caller of these methods should take care to ensure
* that the returned property is not made accessible to untrusted code.
*/
public final class StaticProperty {
// The class static initialization is triggered to initialize these final
// fields during init Phase 1 and before a security manager is set.
private static final String JAVA_HOME;
private static final String USER_HOME;
private static final String USER_DIR;
private static final String USER_NAME;
private static final String JAVA_LIBRARY_PATH;
private static final String SUN_BOOT_LIBRARY_PATH;
private static final String JDK_SERIAL_FILTER;
private static final String JDK_SERIAL_FILTER_FACTORY;
private static final String JAVA_IO_TMPDIR;
private static final String NATIVE_ENCODING;
private StaticProperty() {}
static {
Properties props = System.getProperties();
JAVA_HOME = getProperty(props, "java.home");
USER_HOME = getProperty(props, "user.home");
USER_DIR = getProperty(props, "user.dir");
USER_NAME = getProperty(props, "user.name");
JAVA_IO_TMPDIR = getProperty(props, "java.io.tmpdir");
JAVA_LIBRARY_PATH = getProperty(props, "java.library.path", "");
SUN_BOOT_LIBRARY_PATH = getProperty(props, "sun.boot.library.path", "");
JDK_SERIAL_FILTER = getProperty(props, "jdk.serialFilter", null);
JDK_SERIAL_FILTER_FACTORY = getProperty(props, "jdk.serialFilterFactory", null);
NATIVE_ENCODING = getProperty(props, "native.encoding");
}
private static String getProperty(Properties props, String key) {
String v = props.getProperty(key);
if (v == null) {
throw new InternalError("null property: " + key);
}
return v;
}
private static String getProperty(Properties props, String key,
String defaultVal) {
String v = props.getProperty(key);
return (v == null) ? defaultVal : v;
}
/**
* Return the {@code java.home} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code java.home} system property
*/
public static String javaHome() {
return JAVA_HOME;
}
/**
* Return the {@code user.home} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code user.home} system property
*/
public static String userHome() {
return USER_HOME;
}
/**
* Return the {@code user.dir} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code user.dir} system property
*/
public static String userDir() {
return USER_DIR;
}
/**
* Return the {@code user.name} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code user.name} system property
*/
public static String userName() {
return USER_NAME;
}
/**
* Return the {@code java.library.path} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code java.library.path} system property
*/
public static String javaLibraryPath() {
return JAVA_LIBRARY_PATH;
}
/**
* Return the {@code java.io.tmpdir} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code java.io.tmpdir} system property
*/
public static String javaIoTmpDir() {
return JAVA_IO_TMPDIR;
}
/**
* Return the {@code sun.boot.library.path} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code sun.boot.library.path} system property
*/
public static String sunBootLibraryPath() {
return SUN_BOOT_LIBRARY_PATH;
}
/**
* Return the {@code jdk.serialFilter} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code jdk.serialFilter} system property
*/
public static String jdkSerialFilter() {
return JDK_SERIAL_FILTER;
}
/**
* Return the {@code jdk.serialFilterFactory} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code jdk.serialFilterFactory} system property
*/
public static String jdkSerialFilterFactory() {
return JDK_SERIAL_FILTER_FACTORY;
}
/**
* Return the {@code native.encoding} system property.
*
* {@link SecurityManager#checkPropertyAccess} is NOT checked
* in this method. The caller of this method should take care to ensure
* that the returned property is not made accessible to untrusted code.
*
* @return the {@code native.encoding} system property
*/
public static String nativeEncoding() {
return NATIVE_ENCODING;
}
}
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