diff options
Diffstat (limited to 'src/org/apache/commons/lang3/SystemUtils.java')
| -rw-r--r-- | src/org/apache/commons/lang3/SystemUtils.java | 1419 |
1 files changed, 0 insertions, 1419 deletions
diff --git a/src/org/apache/commons/lang3/SystemUtils.java b/src/org/apache/commons/lang3/SystemUtils.java deleted file mode 100644 index a3da7cd..0000000 --- a/src/org/apache/commons/lang3/SystemUtils.java +++ /dev/null @@ -1,1419 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package org.apache.commons.lang3; - -import java.io.File; - -/** - * <p> - * Helpers for {@code java.lang.System}. - * </p> - * <p> - * If a system property cannot be read due to security restrictions, the corresponding field in this class will be set - * to {@code null} and a message will be written to {@code System.err}. - * </p> - * <p> - * #ThreadSafe# - * </p> - * - * @since 1.0 - * @version $Id: SystemUtils.java 1160564 2011-08-23 06:56:42Z bayard $ - */ -public class SystemUtils { - - /** - * The prefix String for all Windows OS. - */ - private static final String OS_NAME_WINDOWS_PREFIX = "Windows"; - - // System property constants - // ----------------------------------------------------------------------- - // These MUST be declared first. Other constants depend on this. - - /** - * The System property key for the user home directory. - */ - private static final String USER_HOME_KEY = "user.home"; - - /** - * The System property key for the user directory. - */ - private static final String USER_DIR_KEY = "user.dir"; - - /** - * The System property key for the Java IO temporary directory. - */ - private static final String JAVA_IO_TMPDIR_KEY = "java.io.tmpdir"; - - /** - * The System property key for the Java home directory. - */ - private static final String JAVA_HOME_KEY = "java.home"; - - /** - * <p> - * The {@code awt.toolkit} System Property. - * </p> - * <p> - * Holds a class name, on Windows XP this is {@code sun.awt.windows.WToolkit}. - * </p> - * <p> - * <b>On platforms without a GUI, this value is {@code null}.</b> - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.1 - */ - public static final String AWT_TOOLKIT = getSystemProperty("awt.toolkit"); - - /** - * <p> - * The {@code file.encoding} System Property. - * </p> - * <p> - * File encoding, such as {@code Cp1252}. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.0 - * @since Java 1.2 - */ - public static final String FILE_ENCODING = getSystemProperty("file.encoding"); - - /** - * <p> - * The {@code file.separator} System Property. File separator (<code>"/"</code> on UNIX). - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String FILE_SEPARATOR = getSystemProperty("file.separator"); - - /** - * <p> - * The {@code java.awt.fonts} System Property. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.1 - */ - public static final String JAVA_AWT_FONTS = getSystemProperty("java.awt.fonts"); - - /** - * <p> - * The {@code java.awt.graphicsenv} System Property. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.1 - */ - public static final String JAVA_AWT_GRAPHICSENV = getSystemProperty("java.awt.graphicsenv"); - - /** - * <p> - * The {@code java.awt.headless} System Property. The value of this property is the String {@code "true"} or - * {@code "false"}. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @see #isJavaAwtHeadless() - * @since 2.1 - * @since Java 1.4 - */ - public static final String JAVA_AWT_HEADLESS = getSystemProperty("java.awt.headless"); - - /** - * <p> - * The {@code java.awt.printerjob} System Property. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.1 - */ - public static final String JAVA_AWT_PRINTERJOB = getSystemProperty("java.awt.printerjob"); - - /** - * <p> - * The {@code java.class.path} System Property. Java class path. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String JAVA_CLASS_PATH = getSystemProperty("java.class.path"); - - /** - * <p> - * The {@code java.class.version} System Property. Java class format version number. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String JAVA_CLASS_VERSION = getSystemProperty("java.class.version"); - - /** - * <p> - * The {@code java.compiler} System Property. Name of JIT compiler to use. First in JDK version 1.2. Not used in Sun - * JDKs after 1.2. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2. Not used in Sun versions after 1.2. - */ - public static final String JAVA_COMPILER = getSystemProperty("java.compiler"); - - /** - * <p> - * The {@code java.endorsed.dirs} System Property. Path of endorsed directory or directories. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.4 - */ - public static final String JAVA_ENDORSED_DIRS = getSystemProperty("java.endorsed.dirs"); - - /** - * <p> - * The {@code java.ext.dirs} System Property. Path of extension directory or directories. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.3 - */ - public static final String JAVA_EXT_DIRS = getSystemProperty("java.ext.dirs"); - - /** - * <p> - * The {@code java.home} System Property. Java installation directory. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String JAVA_HOME = getSystemProperty(JAVA_HOME_KEY); - - /** - * <p> - * The {@code java.io.tmpdir} System Property. Default temp file path. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_IO_TMPDIR = getSystemProperty(JAVA_IO_TMPDIR_KEY); - - /** - * <p> - * The {@code java.library.path} System Property. List of paths to search when loading libraries. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_LIBRARY_PATH = getSystemProperty("java.library.path"); - - /** - * <p> - * The {@code java.runtime.name} System Property. Java Runtime Environment name. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.0 - * @since Java 1.3 - */ - public static final String JAVA_RUNTIME_NAME = getSystemProperty("java.runtime.name"); - - /** - * <p> - * The {@code java.runtime.version} System Property. Java Runtime Environment version. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.0 - * @since Java 1.3 - */ - public static final String JAVA_RUNTIME_VERSION = getSystemProperty("java.runtime.version"); - - /** - * <p> - * The {@code java.specification.name} System Property. Java Runtime Environment specification name. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_SPECIFICATION_NAME = getSystemProperty("java.specification.name"); - - /** - * <p> - * The {@code java.specification.vendor} System Property. Java Runtime Environment specification vendor. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_SPECIFICATION_VENDOR = getSystemProperty("java.specification.vendor"); - - /** - * <p> - * The {@code java.specification.version} System Property. Java Runtime Environment specification version. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.3 - */ - public static final String JAVA_SPECIFICATION_VERSION = getSystemProperty("java.specification.version"); - private static final JavaVersion JAVA_SPECIFICATION_VERSION_AS_ENUM = JavaVersion.get(JAVA_SPECIFICATION_VERSION); - - /** - * <p> - * The {@code java.util.prefs.PreferencesFactory} System Property. A class name. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.1 - * @since Java 1.4 - */ - public static final String JAVA_UTIL_PREFS_PREFERENCES_FACTORY = - getSystemProperty("java.util.prefs.PreferencesFactory"); - - /** - * <p> - * The {@code java.vendor} System Property. Java vendor-specific string. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String JAVA_VENDOR = getSystemProperty("java.vendor"); - - /** - * <p> - * The {@code java.vendor.url} System Property. Java vendor URL. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String JAVA_VENDOR_URL = getSystemProperty("java.vendor.url"); - - /** - * <p> - * The {@code java.version} System Property. Java version number. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String JAVA_VERSION = getSystemProperty("java.version"); - - /** - * <p> - * The {@code java.vm.info} System Property. Java Virtual Machine implementation info. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.0 - * @since Java 1.2 - */ - public static final String JAVA_VM_INFO = getSystemProperty("java.vm.info"); - - /** - * <p> - * The {@code java.vm.name} System Property. Java Virtual Machine implementation name. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_VM_NAME = getSystemProperty("java.vm.name"); - - /** - * <p> - * The {@code java.vm.specification.name} System Property. Java Virtual Machine specification name. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_VM_SPECIFICATION_NAME = getSystemProperty("java.vm.specification.name"); - - /** - * <p> - * The {@code java.vm.specification.vendor} System Property. Java Virtual Machine specification vendor. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_VM_SPECIFICATION_VENDOR = getSystemProperty("java.vm.specification.vendor"); - - /** - * <p> - * The {@code java.vm.specification.version} System Property. Java Virtual Machine specification version. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_VM_SPECIFICATION_VERSION = getSystemProperty("java.vm.specification.version"); - - /** - * <p> - * The {@code java.vm.vendor} System Property. Java Virtual Machine implementation vendor. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_VM_VENDOR = getSystemProperty("java.vm.vendor"); - - /** - * <p> - * The {@code java.vm.version} System Property. Java Virtual Machine implementation version. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.2 - */ - public static final String JAVA_VM_VERSION = getSystemProperty("java.vm.version"); - - /** - * <p> - * The {@code line.separator} System Property. Line separator (<code>"\n"</code> on UNIX). - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String LINE_SEPARATOR = getSystemProperty("line.separator"); - - /** - * <p> - * The {@code os.arch} System Property. Operating system architecture. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String OS_ARCH = getSystemProperty("os.arch"); - - /** - * <p> - * The {@code os.name} System Property. Operating system name. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String OS_NAME = getSystemProperty("os.name"); - - /** - * <p> - * The {@code os.version} System Property. Operating system version. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String OS_VERSION = getSystemProperty("os.version"); - - /** - * <p> - * The {@code path.separator} System Property. Path separator (<code>":"</code> on UNIX). - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String PATH_SEPARATOR = getSystemProperty("path.separator"); - - /** - * <p> - * The {@code user.country} or {@code user.region} System Property. User's country code, such as {@code GB}. First - * in Java version 1.2 as {@code user.region}. Renamed to {@code user.country} in 1.4 - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.0 - * @since Java 1.2 - */ - public static final String USER_COUNTRY = getSystemProperty("user.country") == null ? - getSystemProperty("user.region") : getSystemProperty("user.country"); - - /** - * <p> - * The {@code user.dir} System Property. User's current working directory. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String USER_DIR = getSystemProperty(USER_DIR_KEY); - - /** - * <p> - * The {@code user.home} System Property. User's home directory. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String USER_HOME = getSystemProperty(USER_HOME_KEY); - - /** - * <p> - * The {@code user.language} System Property. User's language code, such as {@code "en"}. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.0 - * @since Java 1.2 - */ - public static final String USER_LANGUAGE = getSystemProperty("user.language"); - - /** - * <p> - * The {@code user.name} System Property. User's account name. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since Java 1.1 - */ - public static final String USER_NAME = getSystemProperty("user.name"); - - /** - * <p> - * The {@code user.timezone} System Property. For example: {@code "America/Los_Angeles"}. - * </p> - * <p> - * Defaults to {@code null} if the runtime does not have security access to read this property or the property does - * not exist. - * </p> - * <p> - * This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or - * {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of - * sync with that System property. - * </p> - * - * @since 2.1 - */ - public static final String USER_TIMEZONE = getSystemProperty("user.timezone"); - - // Java version checks - // ----------------------------------------------------------------------- - // These MUST be declared after those above as they depend on the - // values being set up - - /** - * <p> - * Is {@code true} if this is Java version 1.1 (also 1.1.x versions). - * </p> - * <p> - * The field will return {@code false} if {@link #JAVA_VERSION} is {@code null}. - * </p> - */ - public static final boolean IS_JAVA_1_1 = getJavaVersionMatches("1.1"); - - /** - * <p> - * Is {@code true} if this is Java version 1.2 (also 1.2.x versions). - * </p> - * <p> - * The field will return {@code false} if {@link #JAVA_VERSION} is {@code null}. - * </p> - */ - public static final boolean IS_JAVA_1_2 = getJavaVersionMatches("1.2"); - - /** - * <p> - * Is {@code true} if this is Java version 1.3 (also 1.3.x versions). - * </p> - * <p> - * The field will return {@code false} if {@link #JAVA_VERSION} is {@code null}. - * </p> - */ - public static final boolean IS_JAVA_1_3 = getJavaVersionMatches("1.3"); - - /** - * <p> - * Is {@code true} if this is Java version 1.4 (also 1.4.x versions). - * </p> - * <p> - * The field will return {@code false} if {@link #JAVA_VERSION} is {@code null}. - * </p> - */ - public static final boolean IS_JAVA_1_4 = getJavaVersionMatches("1.4"); - - /** - * <p> - * Is {@code true} if this is Java version 1.5 (also 1.5.x versions). - * </p> - * <p> - * The field will return {@code false} if {@link #JAVA_VERSION} is {@code null}. - * </p> - */ - public static final boolean IS_JAVA_1_5 = getJavaVersionMatches("1.5"); - - /** - * <p> - * Is {@code true} if this is Java version 1.6 (also 1.6.x versions). - * </p> - * <p> - * The field will return {@code false} if {@link #JAVA_VERSION} is {@code null}. - * </p> - */ - public static final boolean IS_JAVA_1_6 = getJavaVersionMatches("1.6"); - - /** - * <p> - * Is {@code true} if this is Java version 1.7 (also 1.7.x versions). - * </p> - * <p> - * The field will return {@code false} if {@link #JAVA_VERSION} is {@code null}. - * </p> - * - * @since 3.0 - */ - public static final boolean IS_JAVA_1_7 = getJavaVersionMatches("1.7"); - - // Operating system checks - // ----------------------------------------------------------------------- - // These MUST be declared after those above as they depend on the - // values being set up - // OS names from http://www.vamphq.com/os.html - // Selected ones included - please advise dev@commons.apache.org - // if you want another added or a mistake corrected - - /** - * <p> - * Is {@code true} if this is AIX. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_AIX = getOSMatchesName("AIX"); - - /** - * <p> - * Is {@code true} if this is HP-UX. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_HP_UX = getOSMatchesName("HP-UX"); - - /** - * <p> - * Is {@code true} if this is Irix. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_IRIX = getOSMatchesName("Irix"); - - /** - * <p> - * Is {@code true} if this is Linux. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_LINUX = getOSMatchesName("Linux") || getOSMatchesName("LINUX"); - - /** - * <p> - * Is {@code true} if this is Mac. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_MAC = getOSMatchesName("Mac"); - - /** - * <p> - * Is {@code true} if this is Mac. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_MAC_OSX = getOSMatchesName("Mac OS X"); - - /** - * <p> - * Is {@code true} if this is FreeBSD. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 3.0.2 - */ - public static final boolean IS_OS_FREE_BSD = getOSMatchesName("FreeBSD"); - - /** - * <p> - * Is {@code true} if this is OpenBSD. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 3.0.2 - */ - public static final boolean IS_OS_OPEN_BSD = getOSMatchesName("OpenBSD"); - - /** - * <p> - * Is {@code true} if this is NetBSD. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 3.0.2 - */ - public static final boolean IS_OS_NET_BSD = getOSMatchesName("NetBSD"); - - /** - * <p> - * Is {@code true} if this is OS/2. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_OS2 = getOSMatchesName("OS/2"); - - /** - * <p> - * Is {@code true} if this is Solaris. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_SOLARIS = getOSMatchesName("Solaris"); - - /** - * <p> - * Is {@code true} if this is SunOS. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_SUN_OS = getOSMatchesName("SunOS"); - - /** - * <p> - * Is {@code true} if this is a UNIX like system, as in any of AIX, HP-UX, Irix, Linux, MacOSX, Solaris or SUN OS. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.1 - */ - public static final boolean IS_OS_UNIX = IS_OS_AIX || IS_OS_HP_UX || IS_OS_IRIX || IS_OS_LINUX || IS_OS_MAC_OSX - || IS_OS_SOLARIS || IS_OS_SUN_OS || IS_OS_FREE_BSD || IS_OS_OPEN_BSD || IS_OS_NET_BSD; - - /** - * <p> - * Is {@code true} if this is Windows. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_WINDOWS = getOSMatchesName(OS_NAME_WINDOWS_PREFIX); - - /** - * <p> - * Is {@code true} if this is Windows 2000. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_WINDOWS_2000 = getOSMatches(OS_NAME_WINDOWS_PREFIX, "5.0"); - - /** - * <p> - * Is {@code true} if this is Windows 95. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_WINDOWS_95 = getOSMatches(OS_NAME_WINDOWS_PREFIX + " 9", "4.0"); - // Java 1.2 running on Windows98 returns 'Windows 95', hence the above - - /** - * <p> - * Is {@code true} if this is Windows 98. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_WINDOWS_98 = getOSMatches(OS_NAME_WINDOWS_PREFIX + " 9", "4.1"); - // Java 1.2 running on Windows98 returns 'Windows 95', hence the above - - /** - * <p> - * Is {@code true} if this is Windows ME. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_WINDOWS_ME = getOSMatches(OS_NAME_WINDOWS_PREFIX, "4.9"); - // Java 1.2 running on WindowsME may return 'Windows 95', hence the above - - /** - * <p> - * Is {@code true} if this is Windows NT. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_WINDOWS_NT = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " NT"); - // Windows 2000 returns 'Windows 2000' but may suffer from same Java1.2 problem - - /** - * <p> - * Is {@code true} if this is Windows XP. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.0 - */ - public static final boolean IS_OS_WINDOWS_XP = getOSMatches(OS_NAME_WINDOWS_PREFIX, "5.1"); - - // ----------------------------------------------------------------------- - /** - * <p> - * Is {@code true} if this is Windows Vista. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 2.4 - */ - public static final boolean IS_OS_WINDOWS_VISTA = getOSMatches(OS_NAME_WINDOWS_PREFIX, "6.0"); - - /** - * <p> - * Is {@code true} if this is Windows 7. - * </p> - * <p> - * The field will return {@code false} if {@code OS_NAME} is {@code null}. - * </p> - * - * @since 3.0 - */ - public static final boolean IS_OS_WINDOWS_7 = getOSMatches(OS_NAME_WINDOWS_PREFIX, "6.1"); - - /** - * <p> - * Gets the Java home directory as a {@code File}. - * </p> - * - * @return a directory - * @throws SecurityException if a security manager exists and its {@code checkPropertyAccess} method doesn't allow - * access to the specified system property. - * @see System#getProperty(String) - * @since 2.1 - */ - public static File getJavaHome() { - return new File(System.getProperty(JAVA_HOME_KEY)); - } - - /** - * <p> - * Gets the Java IO temporary directory as a {@code File}. - * </p> - * - * @return a directory - * @throws SecurityException if a security manager exists and its {@code checkPropertyAccess} method doesn't allow - * access to the specified system property. - * @see System#getProperty(String) - * @since 2.1 - */ - public static File getJavaIoTmpDir() { - return new File(System.getProperty(JAVA_IO_TMPDIR_KEY)); - } - - /** - * <p> - * Decides if the Java version matches. - * </p> - * - * @param versionPrefix the prefix for the java version - * @return true if matches, or false if not or can't determine - */ - private static boolean getJavaVersionMatches(String versionPrefix) { - return isJavaVersionMatch(JAVA_SPECIFICATION_VERSION, versionPrefix); - } - - /** - * Decides if the operating system matches. - * - * @param osNamePrefix the prefix for the os name - * @param osVersionPrefix the prefix for the version - * @return true if matches, or false if not or can't determine - */ - private static boolean getOSMatches(String osNamePrefix, String osVersionPrefix) { - return isOSMatch(OS_NAME, OS_VERSION, osNamePrefix, osVersionPrefix); - } - - /** - * Decides if the operating system matches. - * - * @param osNamePrefix the prefix for the os name - * @return true if matches, or false if not or can't determine - */ - private static boolean getOSMatchesName(String osNamePrefix) { - return isOSNameMatch(OS_NAME, osNamePrefix); - } - - // ----------------------------------------------------------------------- - /** - * <p> - * Gets a System property, defaulting to {@code null} if the property cannot be read. - * </p> - * <p> - * If a {@code SecurityException} is caught, the return value is {@code null} and a message is written to - * {@code System.err}. - * </p> - * - * @param property the system property name - * @return the system property value or {@code null} if a security problem occurs - */ - private static String getSystemProperty(String property) { - try { - return System.getProperty(property); - } catch (SecurityException ex) { - // we are not allowed to look at this property - System.err.println("Caught a SecurityException reading the system property '" + property - + "'; the SystemUtils property value will default to null."); - return null; - } - } - - /** - * <p> - * Gets the user directory as a {@code File}. - * </p> - * - * @return a directory - * @throws SecurityException if a security manager exists and its {@code checkPropertyAccess} method doesn't allow - * access to the specified system property. - * @see System#getProperty(String) - * @since 2.1 - */ - public static File getUserDir() { - return new File(System.getProperty(USER_DIR_KEY)); - } - - /** - * <p> - * Gets the user home directory as a {@code File}. - * </p> - * - * @return a directory - * @throws SecurityException if a security manager exists and its {@code checkPropertyAccess} method doesn't allow - * access to the specified system property. - * @see System#getProperty(String) - * @since 2.1 - */ - public static File getUserHome() { - return new File(System.getProperty(USER_HOME_KEY)); - } - - /** - * Returns whether the {@link #JAVA_AWT_HEADLESS} value is {@code true}. - * - * @return {@code true} if {@code JAVA_AWT_HEADLESS} is {@code "true"}, {@code false} otherwise. - * @see #JAVA_AWT_HEADLESS - * @since 2.1 - * @since Java 1.4 - */ - public static boolean isJavaAwtHeadless() { - return JAVA_AWT_HEADLESS != null ? JAVA_AWT_HEADLESS.equals(Boolean.TRUE.toString()) : false; - } - - /** - * <p> - * Is the Java version at least the requested version. - * </p> - * <p> - * Example input: - * </p> - * <ul> - * <li>{@code 1.2f} to test for Java 1.2</li> - * <li>{@code 1.31f} to test for Java 1.3.1</li> - * </ul> - * - * @param requiredVersion the required version, for example 1.31f - * @return {@code true} if the actual version is equal or greater than the required version - */ - public static boolean isJavaVersionAtLeast(JavaVersion requiredVersion) { - return JAVA_SPECIFICATION_VERSION_AS_ENUM.atLeast(requiredVersion); - } - - /** - * <p> - * Decides if the Java version matches. - * </p> - * <p> - * This method is package private instead of private to support unit test invocation. - * </p> - * - * @param version the actual Java version - * @param versionPrefix the prefix for the expected Java version - * @return true if matches, or false if not or can't determine - */ - static boolean isJavaVersionMatch(String version, String versionPrefix) { - if (version == null) { - return false; - } - return version.startsWith(versionPrefix); - } - - /** - * Decides if the operating system matches. - * <p> - * This method is package private instead of private to support unit test invocation. - * </p> - * - * @param osName the actual OS name - * @param osVersion the actual OS version - * @param osNamePrefix the prefix for the expected OS name - * @param osVersionPrefix the prefix for the expected OS version - * @return true if matches, or false if not or can't determine - */ - static boolean isOSMatch(String osName, String osVersion, String osNamePrefix, String osVersionPrefix) { - if (osName == null || osVersion == null) { - return false; - } - return osName.startsWith(osNamePrefix) && osVersion.startsWith(osVersionPrefix); - } - - /** - * Decides if the operating system matches. - * <p> - * This method is package private instead of private to support unit test invocation. - * </p> - * - * @param osName the actual OS name - * @param osNamePrefix the prefix for the expected OS name - * @return true if matches, or false if not or can't determine - */ - static boolean isOSNameMatch(String osName, String osNamePrefix) { - if (osName == null) { - return false; - } - return osName.startsWith(osNamePrefix); - } - - // ----------------------------------------------------------------------- - /** - * <p> - * SystemUtils instances should NOT be constructed in standard programming. Instead, the class should be used as - * {@code SystemUtils.FILE_SEPARATOR}. - * </p> - * <p> - * This constructor is public to permit tools that require a JavaBean instance to operate. - * </p> - */ - public SystemUtils() { - super(); - } - -} |