com.jcohy.lang.SystemUtils Maven / Gradle / Ivy
package com.jcohy.lang;
import java.io.File;
/**
* Helpers for { java.lang.System}.
* If a system property cannot be read due to security restrictions, the corresponding field in this class will be set
* to { null} and a message will be written to { System.err}.
*/
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";
/**
* The { awt.toolkit} System Property.
*/
public static final String AWT_TOOLKIT = getSystemProperty("awt.toolkit");
/**
* The { file.encoding} System Property.
* File encoding, such as { Cp1252}.
*/
public static final String FILE_ENCODING = getSystemProperty("file.encoding");
/**
* The { file.separator} System Property.
* The file separator is:
* { "/"} on UNIX
* { "\"} on Windows.
*/
@Deprecated
public static final String FILE_SEPARATOR = getSystemProperty("file.separator");
/**
* The { java.awt.fonts} System Property.
*/
public static final String JAVA_AWT_FONTS = getSystemProperty("java.awt.fonts");
/**
* The { java.awt.graphicsenv} System Property.
* @since 2.1
*/
public static final String JAVA_AWT_GRAPHICSENV = getSystemProperty("java.awt.graphicsenv");
/**
* The { java.awt.headless} System Property. The value of this property is the String { "true"} or
* { "false"}.
*/
public static final String JAVA_AWT_HEADLESS = getSystemProperty("java.awt.headless");
/**
* The { java.awt.printerjob} System Property.
*/
public static final String JAVA_AWT_PRINTERJOB = getSystemProperty("java.awt.printerjob");
/**
* The { java.class.path} System Property. Java class path.
*/
public static final String JAVA_CLASS_PATH = getSystemProperty("java.class.path");
/**
* The { java.class.version} System Property. Java class format version number.
*/
public static final String JAVA_CLASS_VERSION = getSystemProperty("java.class.version");
/**
* The { java.compiler} System Property. Name of JIT compiler to use. First in JDK version 1.2. Not used in Sun
* JDKs after 1.2.
*/
public static final String JAVA_COMPILER = getSystemProperty("java.compiler");
/**
* The { java.endorsed.dirs} System Property. Path of endorsed directory or directories.
*/
public static final String JAVA_ENDORSED_DIRS = getSystemProperty("java.endorsed.dirs");
/**
* The { java.ext.dirs} System Property. Path of extension directory or directories.
*/
public static final String JAVA_EXT_DIRS = getSystemProperty("java.ext.dirs");
/**
*
* The { java.home} System Property. Java installation directory.
*
*/
public static final String JAVA_HOME = getSystemProperty(JAVA_HOME_KEY);
/**
*
* The { java.io.tmpdir} System Property. Default temp file path.
*/
public static final String JAVA_IO_TMPDIR = getSystemProperty(JAVA_IO_TMPDIR_KEY);
/**
*
* The { java.library.path} System Property. List of paths to search when loading libraries.
*/
public static final String JAVA_LIBRARY_PATH = getSystemProperty("java.library.path");
/**
*
* The { java.runtime.name} System Property. Java Runtime Environment name.
*/
public static final String JAVA_RUNTIME_NAME = getSystemProperty("java.runtime.name");
/**
* The { java.runtime.version} System Property. Java Runtime Environment version.
*/
public static final String JAVA_RUNTIME_VERSION = getSystemProperty("java.runtime.version");
/**
* The { java.specification.name} System Property. Java Runtime Environment specification name.
*/
public static final String JAVA_SPECIFICATION_NAME = getSystemProperty("java.specification.name");
/**
*
* The { java.specification.vendor} System Property. Java Runtime Environment specification vendor.
*/
public static final String JAVA_SPECIFICATION_VENDOR = getSystemProperty("java.specification.vendor");
public static final String JAVA_SPECIFICATION_VERSION = getSystemProperty("java.specification.version");
/**
*
* The { java.util.prefs.PreferencesFactory} System Property. A class name.
*/
public static final String JAVA_UTIL_PREFS_PREFERENCES_FACTORY =
getSystemProperty("java.util.prefs.PreferencesFactory");
/**
*
* The { java.vendor} System Property. Java vendor-specific string.
*/
public static final String JAVA_VENDOR = getSystemProperty("java.vendor");
/**
*
* The { java.vendor.url} System Property. Java vendor URL.
*/
public static final String JAVA_VENDOR_URL = getSystemProperty("java.vendor.url");
/**
*
* The { java.version} System Property. Java version number.
*/
public static final String JAVA_VERSION = getSystemProperty("java.version");
/**
*
* The { java.vm.info} System Property. Java Virtual Machine implementation info.
*/
public static final String JAVA_VM_INFO = getSystemProperty("java.vm.info");
/**
*
* The { java.vm.name} System Property. Java Virtual Machine implementation name.*/
public static final String JAVA_VM_NAME = getSystemProperty("java.vm.name");
/**
*
* The { java.vm.specification.name} System Property. Java Virtual Machine specification name.
*/
public static final String JAVA_VM_SPECIFICATION_NAME = getSystemProperty("java.vm.specification.name");
/**
*
* The { java.vm.specification.vendor} System Property. Java Virtual Machine specification vendor.
*/
public static final String JAVA_VM_SPECIFICATION_VENDOR = getSystemProperty("java.vm.specification.vendor");
/**
*
* The { java.vm.specification.version} System Property. Java Virtual Machine specification version.
*/
public static final String JAVA_VM_SPECIFICATION_VERSION = getSystemProperty("java.vm.specification.version");
/**
*
* The { java.vm.vendor} System Property. Java Virtual Machine implementation vendor.
*/
public static final String JAVA_VM_VENDOR = getSystemProperty("java.vm.vendor");
/**
*
* The { java.vm.version} System Property. Java Virtual Machine implementation version.
*/
public static final String JAVA_VM_VERSION = getSystemProperty("java.vm.version");
/**
* The { line.separator} System Property. Line separator ("\n" on UNIX).
*/
@Deprecated
public static final String LINE_SEPARATOR = getSystemProperty("line.separator");
/**
*
* The { os.arch} System Property. Operating system architecture.
*/
public static final String OS_ARCH = getSystemProperty("os.arch");
/**
*
* The { os.name} System Property. Operating system name.
*/
public static final String OS_NAME = getSystemProperty("os.name");
/**
*
* The { os.version} System Property. Operating system version.
*/
public static final String OS_VERSION = getSystemProperty("os.version");
/**
*
* The { path.separator} System Property. Path separator (":" on UNIX).
*/
@Deprecated
public static final String PATH_SEPARATOR = getSystemProperty("path.separator");
/**
* The { user.country} or { user.region} System Property. User's country code, such as { GB}. First
* in Java version 1.2 as { user.region}. Renamed to { user.country} in 1.4
*/
public static final String USER_COUNTRY = getSystemProperty("user.country") == null ?
getSystemProperty("user.region") : getSystemProperty("user.country");
/**
* The { user.dir} System Property. User's current working directory.
*/
public static final String USER_DIR = getSystemProperty(USER_DIR_KEY);
/**
* The { user.home} System Property. User's home directory.
*/
public static final String USER_HOME = getSystemProperty(USER_HOME_KEY);
/**
* The { user.language} System Property. User's language code, such as { "en"}.
*/
public static final String USER_LANGUAGE = getSystemProperty("user.language");
/**
* The { user.name} System Property. User's account name.
*/
public static final String USER_NAME = getSystemProperty("user.name");
/**
* The { user.timezone} System Property. For example: { "America/Los_Angeles"}.
*/
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
/**
* Is { true} if this is Java version 1.1 (also 1.1.x versions).
*/
public static final boolean IS_JAVA_1_1 = getJavaVersionMatches("1.1");
/**
* Is { true} if this is Java version 1.2 (also 1.2.x versions).
*/
public static final boolean IS_JAVA_1_2 = getJavaVersionMatches("1.2");
/**
* Is { true} if this is Java version 1.3 (also 1.3.x versions).
*/
public static final boolean IS_JAVA_1_3 = getJavaVersionMatches("1.3");
/**
*
* Is { true} if this is Java version 1.4 (also 1.4.x versions).
*/
public static final boolean IS_JAVA_1_4 = getJavaVersionMatches("1.4");
/**
* Is { true} if this is Java version 1.5 (also 1.5.x versions).
*/
public static final boolean IS_JAVA_1_5 = getJavaVersionMatches("1.5");
/**
*
* Is { true} if this is Java version 1.6 (also 1.6.x versions).
*/
public static final boolean IS_JAVA_1_6 = getJavaVersionMatches("1.6");
/**
* Is { true} if this is Java version 1.7 (also 1.7.x versions).
*/
public static final boolean IS_JAVA_1_7 = getJavaVersionMatches("1.7");
/**
*
* Is { true} if this is Java version 1.8 (also 1.8.x versions).
*/
public static final boolean IS_JAVA_1_8 = getJavaVersionMatches("1.8");
/**
* Is { true} if this is Java version 1.9 (also 1.9.x versions).
*/
@Deprecated
public static final boolean IS_JAVA_1_9 = getJavaVersionMatches("9");
/**
* Is { true} if this is Java version 9 (also 9.x versions).
*/
public static final boolean IS_JAVA_9 = getJavaVersionMatches("9");
/**
* Is { true} if this is Java version 10 (also 10.x versions).
*/
public static final boolean IS_JAVA_10 = getJavaVersionMatches("10");
// 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 [email protected]
// if you want another added or a mistake corrected
/**
* Is { true} if this is AIX.
*/
public static final boolean IS_OS_AIX = getOSMatchesName("AIX");
/**
* Is { true} if this is HP-UX.
*/
public static final boolean IS_OS_HP_UX = getOSMatchesName("HP-UX");
/**
* Is { true} if this is IBM OS/400.
*/
public static final boolean IS_OS_400 = getOSMatchesName("OS/400");
/**
* Is { true} if this is Irix.
*/
public static final boolean IS_OS_IRIX = getOSMatchesName("Irix");
/**
* Is { true} if this is Linux.
* The field will return { false} if { OS_NAME} is { null}.
* @since 2.0
*/
public static final boolean IS_OS_LINUX = getOSMatchesName("Linux") || getOSMatchesName("LINUX");
/**
* Is { true} if this is Mac.
*/
public static final boolean IS_OS_MAC = getOSMatchesName("Mac");
/**
* Is { true} if this is Mac.
*/
public static final boolean IS_OS_MAC_OSX = getOSMatchesName("Mac OS X");
/**
* Is { true} if this is Mac OS X Cheetah.
*/
public static final boolean IS_OS_MAC_OSX_CHEETAH = getOSMatches("Mac OS X", "10.0");
/**
* Is { true} if this is Mac OS X Puma.
*/
public static final boolean IS_OS_MAC_OSX_PUMA = getOSMatches("Mac OS X", "10.1");
/**
* Is { true} if this is Mac OS X Jaguar.
*/
public static final boolean IS_OS_MAC_OSX_JAGUAR = getOSMatches("Mac OS X", "10.2");
/**
* Is { true} if this is Mac OS X Panther.
*/
public static final boolean IS_OS_MAC_OSX_PANTHER = getOSMatches("Mac OS X", "10.3");
/**
* Is { true} if this is Mac OS X Tiger.
*/
public static final boolean IS_OS_MAC_OSX_TIGER = getOSMatches("Mac OS X", "10.4");
/**
* Is { true} if this is Mac OS X Leopard.
*/
public static final boolean IS_OS_MAC_OSX_LEOPARD = getOSMatches("Mac OS X", "10.5");
/**
* Is { true} if this is Mac OS X Snow Leopard.
*/
public static final boolean IS_OS_MAC_OSX_SNOW_LEOPARD = getOSMatches("Mac OS X", "10.6");
/**
* Is { true} if this is Mac OS X Lion.
*/
public static final boolean IS_OS_MAC_OSX_LION = getOSMatches("Mac OS X", "10.7");
/**
* Is { true} if this is Mac OS X Mountain Lion.
*/
public static final boolean IS_OS_MAC_OSX_MOUNTAIN_LION = getOSMatches("Mac OS X", "10.8");
/**
* Is { true} if this is Mac OS X Mavericks.
* The field will return { false} if { OS_NAME} is { null}.
* @since 3.4
*/
public static final boolean IS_OS_MAC_OSX_MAVERICKS = getOSMatches("Mac OS X", "10.9");
/**
* Is { true} if this is Mac OS X Yosemite.
*/
public static final boolean IS_OS_MAC_OSX_YOSEMITE = getOSMatches("Mac OS X", "10.10");
/**
* Is { true} if this is Mac OS X El Capitan.
*/
public static final boolean IS_OS_MAC_OSX_EL_CAPITAN = getOSMatches("Mac OS X", "10.11");
/**
* Is { true} if this is FreeBSD.
*/
public static final boolean IS_OS_FREE_BSD = getOSMatchesName("FreeBSD");
/**
* Is { true} if this is OpenBSD.
*/
public static final boolean IS_OS_OPEN_BSD = getOSMatchesName("OpenBSD");
/**
* Is { true} if this is NetBSD.
*/
public static final boolean IS_OS_NET_BSD = getOSMatchesName("NetBSD");
/**
* Is { true} if this is OS/2.
*/
public static final boolean IS_OS_OS2 = getOSMatchesName("OS/2");
/**
* Is { true} if this is Solaris.
*/
public static final boolean IS_OS_SOLARIS = getOSMatchesName("Solaris");
/**
* Is { true} if this is SunOS.
*/
public static final boolean IS_OS_SUN_OS = getOSMatchesName("SunOS");
/**
* Is { true} if this is a UNIX like system, as in any of AIX, HP-UX, Irix, Linux, MacOSX, Solaris or SUN OS.
*/
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;
/**
* Is { true} if this is Windows.
*/
public static final boolean IS_OS_WINDOWS = getOSMatchesName(OS_NAME_WINDOWS_PREFIX);
/**
* Is { true} if this is Windows 2000.
*/
public static final boolean IS_OS_WINDOWS_2000 = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " 2000");
/**
* Is { true} if this is Windows 2003.
*/
public static final boolean IS_OS_WINDOWS_2003 = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " 2003");
/**
* Is { true} if this is Windows Server 2008.
*/
public static final boolean IS_OS_WINDOWS_2008 = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " Server 2008");
/**
* Is { true} if this is Windows Server 2012.
*/
public static final boolean IS_OS_WINDOWS_2012 = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " Server 2012");
/**
* Is { true} if this is Windows 95.
*/
public static final boolean IS_OS_WINDOWS_95 = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " 95");
/**
* Is { true} if this is Windows 98.
*/
public static final boolean IS_OS_WINDOWS_98 = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " 98");
/**
* Is { true} if this is Windows ME.
* The field will return { false} if { OS_NAME} is { null}.
*/
public static final boolean IS_OS_WINDOWS_ME = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " Me");
/**
* Is { true} if this is Windows NT.
*/
public static final boolean IS_OS_WINDOWS_NT = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " NT");
/**
* Is { true} if this is Windows XP.
*/
public static final boolean IS_OS_WINDOWS_XP = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " XP");
// -----------------------------------------------------------------------
/**
* Is { true} if this is Windows Vista.
*/
public static final boolean IS_OS_WINDOWS_VISTA = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " Vista");
/**
* Is { true} if this is Windows 7.
*/
public static final boolean IS_OS_WINDOWS_7 = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " 7");
/**
* Is { true} if this is Windows 8.
*/
public static final boolean IS_OS_WINDOWS_8 = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " 8");
/**
* Is { true} if this is Windows 10.
*/
public static final boolean IS_OS_WINDOWS_10 = getOSMatchesName(OS_NAME_WINDOWS_PREFIX + " 10");
/**
* Is { true} if this is z/OS.
*/
// Values on a z/OS system I tested (Gary Gregory - 2016-03-12)
// os.arch = s390x
// os.encoding = ISO8859_1
// os.name = z/OS
// os.version = 02.02.00
public static final boolean IS_OS_ZOS = getOSMatchesName("z/OS");
/**
* Gets the Java home directory as a { File}.
* @return result
*/
public static File getJavaHome() {
return new File(System.getProperty(JAVA_HOME_KEY));
}
/**
* Gets the host name from an environment variable.
* @return result
*/
public static String getHostName() {
return SystemUtils.IS_OS_WINDOWS ? System.getenv("COMPUTERNAME") : System.getenv("HOSTNAME");
}
/**
* Gets the Java IO temporary directory as a { File}.
* @return result
*/
public static File getJavaIoTmpDir() {
return new File(System.getProperty(JAVA_IO_TMPDIR_KEY));
}
/**
* 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(final String osNamePrefix, final String osVersionPrefix) {
return isOSMatch(OS_NAME, OS_VERSION, osNamePrefix, osVersionPrefix);
}
private static boolean getJavaVersionMatches(final String versionPrefix) {
return isJavaVersionMatch(JAVA_SPECIFICATION_VERSION, versionPrefix);
}
/**
* 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(final String osNamePrefix) {
return isOSNameMatch(OS_NAME, osNamePrefix);
}
// -----------------------------------------------------------------------
/**
* Gets a System property, defaulting to { null} if the property cannot be read.
*/
private static String getSystemProperty(final String property) {
try {
return System.getProperty(property);
} catch (final 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;
}
}
/**
* Gets the user directory as a { File}.
* @return result
*/
public static File getUserDir() {
return new File(System.getProperty(USER_DIR_KEY));
}
/**
* Gets the user home directory as a { File}.
* @return a directory
* @throws SecurityException if a security manager exists and its { 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));
}
public static String getSysPath() {
String path = Thread.currentThread().getContextClassLoader()
.getResource("").toString();
String temp = path.replaceFirst("file:/", "").replaceFirst(
"WEB-INF/classes/", "");
String separator = System.getProperty("file.separator");
String resultPath = temp.replaceAll("/", separator + separator);
return resultPath;
}
public static String getClassPath() {
String path = Thread.currentThread().getContextClassLoader()
.getResource("").toString();
String temp = path.replaceFirst("file:/", "");
String separator = System.getProperty("file.separator");
String resultPath = temp.replaceAll("/", separator + separator);
return resultPath;
}
/**
* Returns whether the {@link #JAVA_AWT_HEADLESS} value is { true}.
*
* @return { true} if { JAVA_AWT_HEADLESS} is { "true"}, { false} otherwise.
*/
public static boolean isJavaAwtHeadless() {
return Boolean.TRUE.toString().equals(JAVA_AWT_HEADLESS);
}
/**
* Decides if the Java version matches.
* This method is package private instead of private to support unit test invocation.
* @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(final String version, final String versionPrefix) {
if (version == null) {
return false;
}
return version.startsWith(versionPrefix);
}
/**
* Decides if the operating system matches.
* This method is package private instead of private to support unit test invocation.
* @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(final String osName, final String osVersion, final String osNamePrefix, final String osVersionPrefix) {
if (osName == null || osVersion == null) {
return false;
}
return isOSNameMatch(osName, osNamePrefix) && isOSVersionMatch(osVersion, osVersionPrefix);
}
/**
* Decides if the operating system matches.
* This method is package private instead of private to support unit test invocation.
* @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(final String osName, final String osNamePrefix) {
if (osName == null) {
return false;
}
return osName.startsWith(osNamePrefix);
}
/**
* Decides if the operating system version matches.
* This method is package private instead of private to support unit test invocation.
* @param osVersion the actual OS version
* @param osVersionPrefix the prefix for the expected OS version
* @return true if matches, or false if not or can't determine
*/
static boolean isOSVersionMatch(final String osVersion, final String osVersionPrefix) {
if (StringUtils.isEmpty(osVersion)) {
return false;
}
// Compare parts of the version string instead of using String.startsWith(String) because otherwise
// osVersionPrefix 10.1 would also match osVersion 10.10
final String[] versionPrefixParts = osVersionPrefix.split("\\.");
final String[] versionParts = osVersion.split("\\.");
for (int i = 0; i < Math.min(versionPrefixParts.length, versionParts.length); i++) {
if (!versionPrefixParts[i].equals(versionParts[i])) {
return false;
}
}
return true;
}
// -----------------------------------------------------------------------
/**
* SystemUtils instances should NOT be constructed in standard programming. Instead, the class should be used as
*/
public SystemUtils() {
super();
}
}