| /* |
| * 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.lang; |
| |
| import java.io.File; |
| |
| /** |
| * <p> |
| * Helpers for <code>java.lang.System</code>. |
| * </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</code> |
| * and a message will be written to <code>System.err</code>. |
| * </p> |
| * |
| * <p> |
| * #ThreadSafe# |
| * </p> |
| * |
| * @author Apache Software Foundation |
| * @author Based on code from Avalon Excalibur |
| * @author Based on code from Lucene |
| * @author <a href="mailto:sdowney@panix.com">Steve Downey</a> |
| * @author Gary Gregory |
| * @author Michael Becke |
| * @author Tetsuya Kaneuchi |
| * @author Rafal Krupinski |
| * @author Jason Gritman |
| * @since 1.0 |
| * @version $Id$ |
| */ |
| public class SystemUtils { |
| |
| private static final int JAVA_VERSION_TRIM_SIZE = 3; |
| |
| /** |
| * 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</code> System Property. |
| * </p> |
| * <p> |
| * Holds a class name, on Windows XP this is <code>sun.awt.windows.WToolkit</code>. |
| * </p> |
| * <p> |
| * <b>On platforms without a GUI, this value is <code>null</code>.</b> |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. |
| * </p> |
| * <p> |
| * File encoding, such as <code>Cp1252</code>. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. File separator (<code>"/"</code> on UNIX). |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. |
| * The value of this property is the String <code>"true"</code> or <code>"false"</code>. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java class path. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java class format version number. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> 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</code> 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</code> System Property. Path of endorsed directory or directories. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Path of extension directory or directories. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java installation directory. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Default temp file path. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. List of paths to search when loading libraries. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Runtime Environment name. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Runtime Environment version. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Runtime Environment specification name. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Runtime Environment specification vendor. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Runtime Environment specification version. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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"); |
| |
| /** |
| * <p> |
| * The <code>java.util.prefs.PreferencesFactory</code> System Property. A class name. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java vendor-specific string. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java vendor URL. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java version number. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Virtual Machine implementation info. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Virtual Machine implementation name. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Virtual Machine specification name. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Virtual Machine specification vendor. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Virtual Machine specification version. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Virtual Machine implementation vendor. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Java Virtual Machine implementation version. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Line separator (<code>"\n"</code> on UNIX). |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Operating system architecture. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Operating system name. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Operating system version. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. Path separator (<code>":"</code> on UNIX). |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> or <code>user.region</code> System Property. |
| * User's country code, such as <code>GB</code>. First in |
| * Java version 1.2 as <code>user.region</code>. Renamed to <code>user.country</code> in 1.4 |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. User's current working directory. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. User's home directory. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. User's language code, such as <code>"en"</code>. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. User's account name. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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</code> System Property. For example: <code>"America/Los_Angeles"</code>. |
| * </p> |
| * |
| * <p> |
| * Defaults to <code>null</code> 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 |
| // ----------------------------------------------------------------------- |
| // This MUST be declared after those above as it depends on the |
| // values being set up |
| |
| /** |
| * <p> |
| * Gets the Java version as a <code>String</code> trimming leading letters. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>null</code> if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| * |
| * @since 2.1 |
| */ |
| public static final String JAVA_VERSION_TRIMMED = getJavaVersionTrimmed(); |
| |
| // Java version values |
| // ----------------------------------------------------------------------- |
| // These MUST be declared after the trim above as they depend on the |
| // value being set up |
| |
| /** |
| * <p> |
| * Gets the Java version as a <code>float</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>1.2f</code> for Java 1.2 |
| * <li><code>1.31f</code> for Java 1.3.1 |
| * </ul> |
| * |
| * <p> |
| * The field will return zero if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final float JAVA_VERSION_FLOAT = getJavaVersionAsFloat(); |
| |
| /** |
| * <p> |
| * Gets the Java version as an <code>int</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>120</code> for Java 1.2 |
| * <li><code>131</code> for Java 1.3.1 |
| * </ul> |
| * |
| * <p> |
| * The field will return zero if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final int JAVA_VERSION_INT = getJavaVersionAsInt(); |
| |
| // Java version checks |
| // ----------------------------------------------------------------------- |
| // These MUST be declared after those above as they depend on the |
| // values being set up |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.1 (also 1.1.x versions). |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_1 = getJavaVersionMatches("1.1"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.2 (also 1.2.x versions). |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_2 = getJavaVersionMatches("1.2"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.3 (also 1.3.x versions). |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_3 = getJavaVersionMatches("1.3"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.4 (also 1.4.x versions). |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_4 = getJavaVersionMatches("1.4"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.5 (also 1.5.x versions). |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_5 = getJavaVersionMatches("1.5"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.6 (also 1.6.x versions). |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_6 = getJavaVersionMatches("1.6"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.7 (also 1.7.x versions). |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| * |
| * @since 2.5 |
| */ |
| 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</code> if this is AIX. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_AIX = getOSMatchesName("AIX"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is HP-UX. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_HP_UX = getOSMatchesName("HP-UX"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Irix. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_IRIX = getOSMatchesName("Irix"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Linux. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_LINUX = getOSMatchesName("Linux") || getOSMatchesName("LINUX"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Mac. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_MAC = getOSMatchesName("Mac"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Mac. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_MAC_OSX = getOSMatchesName("Mac OS X"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is OS/2. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_OS2 = getOSMatchesName("OS/2"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Solaris. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_SOLARIS = getOSMatchesName("Solaris"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is SunOS. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_SUN_OS = getOSMatchesName("SunOS"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> 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</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </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; |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS = getOSMatchesName(OS_NAME_WINDOWS_PREFIX); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows 2000. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS_2000 = getOSMatches(OS_NAME_WINDOWS_PREFIX, "5.0"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows 95. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </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</code> if this is Windows 98. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </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</code> if this is Windows ME. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </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</code> if this is Windows NT. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </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</code> if this is Windows XP. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS_XP = getOSMatches(OS_NAME_WINDOWS_PREFIX, "5.1"); |
| |
| // ----------------------------------------------------------------------- |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows Vista. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.4 |
| */ |
| public static final boolean IS_OS_WINDOWS_VISTA = getOSMatches(OS_NAME_WINDOWS_PREFIX, "6.0"); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows 7. |
| * </p> |
| * |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is <code>null</code>. |
| * </p> |
| * |
| * @since 2.5 |
| */ |
| 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</code>. |
| * </p> |
| * |
| * @return a directory |
| * @throws SecurityException if a security manager exists and its |
| * <code>checkPropertyAccess</code> 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</code>. |
| * </p> |
| * |
| * @return a directory |
| * @throws SecurityException if a security manager exists and its |
| * <code>checkPropertyAccess</code> 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>Gets the Java version number as a <code>float</code>.</p> |
| * |
| * <p>Example return values:</p> |
| * <ul> |
| * <li><code>1.2f</code> for JDK 1.2 |
| * <li><code>1.31f</code> for JDK 1.3.1 |
| * </ul> |
| * |
| * @return the version, for example 1.31f for JDK 1.3.1 |
| * @deprecated Use {@link #JAVA_VERSION_FLOAT} instead. |
| * Method will be removed in Commons Lang 3.0. |
| */ |
| public static float getJavaVersion() { |
| return JAVA_VERSION_FLOAT; |
| } |
| |
| /** |
| * <p> |
| * Gets the Java version number as a <code>float</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>1.2f</code> for Java 1.2</li> |
| * <li><code>1.31f</code> for Java 1.3.1</li> |
| * <li><code>1.6f</code> for Java 1.6.0_20</li> |
| * </ul> |
| * |
| * <p> |
| * Patch releases are not reported. |
| * </p> |
| * |
| * @return the version, for example 1.31f for Java 1.3.1 |
| */ |
| private static float getJavaVersionAsFloat() { |
| return toVersionFloat(toJavaVersionIntArray(SystemUtils.JAVA_VERSION, JAVA_VERSION_TRIM_SIZE)); |
| } |
| |
| /** |
| * <p> |
| * Gets the Java version number as an <code>int</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>120</code> for Java 1.2</li> |
| * <li><code>131</code> for Java 1.3.1</li> |
| * <li><code>160</code> for Java 1.6.0_20</li> |
| * </ul> |
| * |
| * <p> |
| * Patch releases are not reported. |
| * </p> |
| * |
| * @return the version, for example 131 for Java 1.3.1 |
| */ |
| private static int getJavaVersionAsInt() { |
| return toVersionInt(toJavaVersionIntArray(SystemUtils.JAVA_VERSION, JAVA_VERSION_TRIM_SIZE)); |
| } |
| |
| /** |
| * <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_VERSION_TRIMMED, versionPrefix); |
| } |
| |
| /** |
| * Trims the text of the java version to start with numbers. |
| * |
| * @return the trimmed java version |
| */ |
| private static String getJavaVersionTrimmed() { |
| if (JAVA_VERSION != null) { |
| for (int i = 0; i < JAVA_VERSION.length(); i++) { |
| char ch = JAVA_VERSION.charAt(i); |
| if (ch >= '0' && ch <= '9') { |
| return JAVA_VERSION.substring(i); |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * 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</code> if the property cannot be read. |
| * </p> |
| * |
| * <p> |
| * If a <code>SecurityException</code> is caught, the return value is <code>null</code> and a message is written to |
| * <code>System.err</code>. |
| * </p> |
| * |
| * @param property |
| * the system property name |
| * @return the system property value or <code>null</code> 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</code>. |
| * </p> |
| * |
| * @return a directory |
| * @throws SecurityException if a security manager exists and its |
| * <code>checkPropertyAccess</code> 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</code>. |
| * </p> |
| * |
| * @return a directory |
| * @throws SecurityException if a security manager exists and its |
| * <code>checkPropertyAccess</code> 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</code>. |
| * |
| * @return <code>true</code> if <code>JAVA_AWT_HEADLESS</code> is <code>"true"</code>, <code>false</code> 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</code> to test for Java 1.2</li> |
| * <li><code>1.31f</code> to test for Java 1.3.1</li> |
| * </ul> |
| * |
| * @param requiredVersion |
| * the required version, for example 1.31f |
| * @return <code>true</code> if the actual version is equal or greater than the required version |
| */ |
| public static boolean isJavaVersionAtLeast(float requiredVersion) { |
| return JAVA_VERSION_FLOAT >= requiredVersion; |
| } |
| |
| /** |
| * <p> |
| * Is the Java version at least the requested version. |
| * </p> |
| * |
| * <p> |
| * Example input: |
| * </p> |
| * <ul> |
| * <li><code>120</code> to test for Java 1.2 or greater</li> |
| * <li><code>131</code> to test for Java 1.3.1 or greater</li> |
| * </ul> |
| * |
| * @param requiredVersion |
| * the required version, for example 131 |
| * @return <code>true</code> if the actual version is equal or greater than the required version |
| * @since 2.0 |
| */ |
| public static boolean isJavaVersionAtLeast(int requiredVersion) { |
| return JAVA_VERSION_INT >= 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> |
| * Converts the given Java version string to a <code>float</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>1.2f</code> for Java 1.2</li> |
| * <li><code>1.31f</code> for Java 1.3.1</li> |
| * <li><code>1.6f</code> for Java 1.6.0_20</li> |
| * </ul> |
| * |
| * <p> |
| * Patch releases are not reported. |
| * </p> |
| * <p> |
| * This method is package private instead of private to support unit test invocation. |
| * </p> |
| * |
| * @param version The string version |
| * @return the version, for example 1.31f for Java 1.3.1 |
| */ |
| static float toJavaVersionFloat(String version) { |
| return toVersionFloat(toJavaVersionIntArray(version, JAVA_VERSION_TRIM_SIZE)); |
| } |
| |
| /** |
| * <p> |
| * Converts the given Java version string to an <code>int</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>120</code> for Java 1.2</li> |
| * <li><code>131</code> for Java 1.3.1</li> |
| * <li><code>160</code> for Java 1.6.0_20</li> |
| * </ul> |
| * |
| * <p> |
| * Patch releases are not reported. |
| * </p> |
| * <p> |
| * This method is package private instead of private to support unit test invocation. |
| * </p> |
| * |
| * @param version The string version |
| * @return the version, for example 131 for Java 1.3.1 |
| */ |
| static int toJavaVersionInt(String version) { |
| return toVersionInt(toJavaVersionIntArray(version, JAVA_VERSION_TRIM_SIZE)); |
| } |
| |
| /** |
| * <p> |
| * Converts the given Java version string to an <code>int[]</code> of maximum size <code>3</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>[1, 2, 0]</code> for Java 1.2</li> |
| * <li><code>[1, 3, 1]</code> for Java 1.3.1</li> |
| * <li><code>[1, 5, 0]</code> for Java 1.5.0_21</li> |
| * </ul> |
| * <p> |
| * This method is package private instead of private to support unit test invocation. |
| * </p> |
| * |
| * @param version The string version |
| * @return the version, for example [1, 5, 0] for Java 1.5.0_21 |
| */ |
| static int[] toJavaVersionIntArray(String version) { |
| return toJavaVersionIntArray(version, Integer.MAX_VALUE); |
| } |
| |
| /** |
| * <p> |
| * Converts the given Java version string to an <code>int[]</code> of maximum size <code>limit</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>[1, 2, 0]</code> for Java 1.2</li> |
| * <li><code>[1, 3, 1]</code> for Java 1.3.1</li> |
| * <li><code>[1, 5, 0, 21]</code> for Java 1.5.0_21</li> |
| * </ul> |
| * |
| * @param version The string version |
| * @param limit version limit |
| * @return the version, for example [1, 5, 0, 21] for Java 1.5.0_21 |
| */ |
| private static int[] toJavaVersionIntArray(String version, int limit) { |
| if (version == null) { |
| return ArrayUtils.EMPTY_INT_ARRAY; |
| } |
| String[] strings = StringUtils.split(version, "._- "); |
| int[] ints = new int[Math.min(limit, strings.length)]; |
| int j = 0; |
| for (int i = 0; i < strings.length && j < limit; i++) { |
| String s = strings[i]; |
| if (s.length() > 0) { |
| try { |
| ints[j] = Integer.parseInt(s); |
| j++; |
| } catch (Exception e) { |
| } |
| } |
| } |
| if (ints.length > j) { |
| int[] newInts = new int[j]; |
| System.arraycopy(ints, 0, newInts, 0, j); |
| ints = newInts; |
| } |
| return ints; |
| } |
| |
| /** |
| * <p> |
| * Converts given the Java version array to a <code>float</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>1.2f</code> for Java 1.2</li> |
| * <li><code>1.31f</code> for Java 1.3.1</li> |
| * <li><code>1.6f</code> for Java 1.6.0_20</li> |
| * </ul> |
| * |
| * <p> |
| * Patch releases are not reported. |
| * </p> |
| * |
| * @param javaVersions The version numbers |
| * @return the version, for example 1.31f for Java 1.3.1 |
| */ |
| private static float toVersionFloat(int[] javaVersions) { |
| if (javaVersions == null || javaVersions.length == 0) { |
| return 0f; |
| } |
| if (javaVersions.length == 1) { |
| return javaVersions[0]; |
| } |
| StringBuffer builder = new StringBuffer(); |
| builder.append(javaVersions[0]); |
| builder.append('.'); |
| for (int i = 1; i < javaVersions.length; i++) { |
| builder.append(javaVersions[i]); |
| } |
| try { |
| return Float.parseFloat(builder.toString()); |
| } catch (Exception ex) { |
| return 0f; |
| } |
| } |
| |
| /** |
| * <p> |
| * Converts given the Java version array to an <code>int</code>. |
| * </p> |
| * |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>120</code> for Java 1.2</li> |
| * <li><code>131</code> for Java 1.3.1</li> |
| * <li><code>160</code> for Java 1.6.0_20</li> |
| * </ul> |
| * |
| * <p> |
| * Patch releases are not reported. |
| * </p> |
| * |
| * @param javaVersions The version numbers |
| * @return the version, for example 1.31f for Java 1.3.1 |
| */ |
| private static int toVersionInt(int[] javaVersions) { |
| if (javaVersions == null) { |
| return 0; |
| } |
| int intVersion = 0; |
| int len = javaVersions.length; |
| if (len >= 1) { |
| intVersion = javaVersions[0] * 100; |
| } |
| if (len >= 2) { |
| intVersion += javaVersions[1] * 10; |
| } |
| if (len >= 3) { |
| intVersion += javaVersions[2]; |
| } |
| return intVersion; |
| } |
| |
| // ----------------------------------------------------------------------- |
| /** |
| * <p> |
| * SystemUtils instances should NOT be constructed in standard programming. Instead, the class should be used as |
| * <code>SystemUtils.FILE_SEPARATOR</code>. |
| * </p> |
| * |
| * <p> |
| * This constructor is public to permit tools that require a JavaBean instance to operate. |
| * </p> |
| */ |
| public SystemUtils() { |
| super(); |
| } |
| |
| } |
