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/*
* 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.util.function.BooleanSupplier;
import java.util.function.IntSupplier;
import java.util.function.LongSupplier;
import java.util.function.Supplier;
/**
* Accesses current system property names and values.
*
* @since 3.13.0
*/
public final class SystemProperties {
private static final Supplier NULL_SUPPLIER = () -> null;
/**
* The System property name {@value}.
*/
public static final String AWT_TOOLKIT = "awt.toolkit";
/**
* The System property name {@value}.
*/
public static final String FILE_ENCODING = "file.encoding";
/**
* The System property name {@value}.
*/
public static final String FILE_SEPARATOR = "file.separator";
/**
* The System property name {@value}.
*/
public static final String JAVA_AWT_FONTS = "java.awt.fonts";
/**
* The System property name {@value}.
*/
public static final String JAVA_AWT_GRAPHICSENV = "java.awt.graphicsenv";
/**
* The System property name {@value}.
*/
public static final String JAVA_AWT_HEADLESS = "java.awt.headless";
/**
* The System property name {@value}.
*/
public static final String JAVA_AWT_PRINTERJOB = "java.awt.printerjob";
/**
* The System property name {@value}.
*/
public static final String JAVA_CLASS_PATH = "java.class.path";
/**
* The System property name {@value}.
*/
public static final String JAVA_CLASS_VERSION = "java.class.version";
/**
* The System property name {@value}.
*/
public static final String JAVA_COMPILER = "java.compiler";
/**
* The System property name {@value}.
*/
public static final String JAVA_ENDORSED_DIRS = "java.endorsed.dirs";
/**
* The System property name {@value}.
*/
public static final String JAVA_EXT_DIRS = "java.ext.dirs";
/**
* The System property name {@value}.
*/
public static final String JAVA_HOME = "java.home";
/**
* The System property name {@value}.
*/
public static final String JAVA_IO_TMPDIR = "java.io.tmpdir";
/**
* The System property name {@value}.
*/
public static final String JAVA_LIBRARY_PATH = "java.library.path";
/**
* The System property name {@value}.
*/
public static final String JAVA_LOCALE_PROVIDERS = "java.locale.providers";
/**
* The System property name {@value}.
*/
public static final String JAVA_RUNTIME_NAME = "java.runtime.name";
/**
* The System property name {@value}.
*/
public static final String JAVA_RUNTIME_VERSION = "java.runtime.version";
/**
* The System property name {@value}.
*/
public static final String JAVA_SPECIFICATION_NAME = "java.specification.name";
/**
* The System property name {@value}.
*/
public static final String JAVA_SPECIFICATION_VENDOR = "java.specification.vendor";
/**
* The System property name {@value}.
*/
public static final String JAVA_SPECIFICATION_VERSION = "java.specification.version";
/**
* The System property name {@value}.
*/
public static final String JAVA_UTIL_PREFS_PREFERENCES_FACTORY = "java.util.prefs.PreferencesFactory";
/**
* The System property name {@value}.
*/
public static final String JAVA_VENDOR = "java.vendor";
/**
* The System property name {@value}.
*/
public static final String JAVA_VENDOR_URL = "java.vendor.url";
/**
* The System property name {@value}.
*/
public static final String JAVA_VERSION = "java.version";
/**
* The System property name {@value}.
*/
public static final String JAVA_VM_INFO = "java.vm.info";
/**
* The System property name {@value}.
*/
public static final String JAVA_VM_NAME = "java.vm.name";
/**
* The System property name {@value}.
*/
public static final String JAVA_VM_SPECIFICATION_NAME = "java.vm.specification.name";
/**
* The System property name {@value}.
*/
public static final String JAVA_VM_SPECIFICATION_VENDOR = "java.vm.specification.vendor";
/**
* The System property name {@value}.
*/
public static final String JAVA_VM_SPECIFICATION_VERSION = "java.vm.specification.version";
/**
* The System property name {@value}.
*/
public static final String JAVA_VM_VENDOR = "java.vm.vendor";
/**
* The System property name {@value}.
*/
public static final String JAVA_VM_VERSION = "java.vm.version";
/**
* The System property name {@value}.
*/
public static final String LINE_SEPARATOR = "line.separator";
/**
* The System property name {@value}.
*/
public static final String OS_ARCH = "os.arch";
/**
* The System property name {@value}.
*/
public static final String OS_NAME = "os.name";
/**
* The System property name {@value}.
*/
public static final String OS_VERSION = "os.version";
/**
* The System property name {@value}.
*/
public static final String PATH_SEPARATOR = "path.separator";
/**
* The System property name {@value}.
*/
public static final String USER_COUNTRY = "user.country";
/**
* The System property name {@value}.
*/
public static final String USER_DIR = "user.dir";
/**
* The System property name {@value}.
*/
public static final String USER_HOME = "user.home";
/**
* The System property name {@value}.
*/
public static final String USER_LANGUAGE = "user.language";
/**
* The System property name {@value}.
*/
public static final String USER_NAME = "user.name";
/**
* The System property name {@value}.
*/
public static final String USER_REGION = "user.region";
/**
* The System property name {@value}.
*/
public static final String USER_TIMEZONE = "user.timezone";
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getAwtToolkit() {
return getProperty(AWT_TOOLKIT);
}
/**
* Gets the current value for the property named {@code key} as an {@code boolean}.
*
* @param key
* The key
* @param defaultIfAbsent
* The default value
* @return an {@code boolean} or defaultIfAbsent
*/
public static boolean getBoolean(final String key, final BooleanSupplier defaultIfAbsent) {
final String str = getProperty(key);
return str == null ? defaultIfAbsent != null && defaultIfAbsent.getAsBoolean() : Boolean.parseBoolean(str);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getFileEncoding() {
return getProperty(FILE_ENCODING);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getFileSeparator() {
return getProperty(FILE_SEPARATOR);
}
/**
* Gets the current value for the property named {@code key} as an {@code int}.
*
* @param key
* The key
* @param defaultIfAbsent
* The default value
* @return an {@code int} or defaultIfAbsent
*/
public static int getInt(final String key, final IntSupplier defaultIfAbsent) {
final String str = getProperty(key);
return str == null ? defaultIfAbsent != null ? defaultIfAbsent.getAsInt() : 0 : Integer.parseInt(str);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaAwtFonts() {
return getProperty(JAVA_AWT_FONTS);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaAwtGraphicsenv() {
return getProperty(JAVA_AWT_GRAPHICSENV);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaAwtHeadless() {
return getProperty(JAVA_AWT_HEADLESS);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaAwtPrinterjob() {
return getProperty(JAVA_AWT_PRINTERJOB);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaClassPath() {
return getProperty(JAVA_CLASS_PATH);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaClassVersion() {
return getProperty(JAVA_CLASS_VERSION);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaCompiler() {
return getProperty(JAVA_COMPILER);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaEndorsedDirs() {
return getProperty(JAVA_ENDORSED_DIRS);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaExtDirs() {
return getProperty(JAVA_EXT_DIRS);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaHome() {
return getProperty(JAVA_HOME);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaIoTmpdir() {
return getProperty(JAVA_IO_TMPDIR);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaLibraryPath() {
return getProperty(JAVA_LIBRARY_PATH);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* Java 9 and above.
*
* @return the current value from the system properties map.
*/
public static String getJavaLocaleProviders() {
return getProperty(JAVA_LOCALE_PROVIDERS);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaRuntimeName() {
return getProperty(JAVA_RUNTIME_NAME);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaRuntimeVersion() {
return getProperty(JAVA_RUNTIME_VERSION);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaSpecificationName() {
return getProperty(JAVA_SPECIFICATION_NAME);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaSpecificationVendor() {
return getProperty(JAVA_SPECIFICATION_VENDOR);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaSpecificationVersion() {
return getProperty(JAVA_SPECIFICATION_VERSION);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaUtilPrefsPreferencesFactory() {
return getProperty(JAVA_UTIL_PREFS_PREFERENCES_FACTORY);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVendor() {
return getProperty(JAVA_VENDOR);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVendorUrl() {
return getProperty(JAVA_VENDOR_URL);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVersion() {
return getProperty(JAVA_VERSION);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVmInfo() {
return getProperty(JAVA_VM_INFO);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVmName() {
return getProperty(JAVA_VM_NAME);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVmSpecificationName() {
return getProperty(JAVA_VM_SPECIFICATION_NAME);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVmSpecificationVendor() {
return getProperty(JAVA_VM_SPECIFICATION_VENDOR);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVmSpecificationVersion() {
return getProperty(JAVA_VM_SPECIFICATION_VERSION);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVmVendor() {
return getProperty(JAVA_VM_VENDOR);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getJavaVmVersion() {
return getProperty(JAVA_VM_VERSION);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getLineSeparator() {
return getProperty(LINE_SEPARATOR);
}
/**
* Gets the current value for the property named {@code key} as a {@code long}.
*
* @param key
* The key
* @param defaultIfAbsent
* The default value
* @return a {@code long} or defaultIfAbsent
*/
public static long getLong(final String key, final LongSupplier defaultIfAbsent) {
final String str = getProperty(key);
return str == null ? defaultIfAbsent != null ? defaultIfAbsent.getAsLong() : 0 : Long.parseLong(str);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getOsArch() {
return getProperty(OS_ARCH);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getOsName() {
return getProperty(OS_NAME);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getOsVersion() {
return getProperty(OS_VERSION);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getPathSeparator() {
return getProperty(PATH_SEPARATOR);
}
/**
* Gets a System property, defaulting to {@code null} if the property cannot be read.
*
* If a {@link SecurityException} is caught, the return value is {@code null}.
*
*
* @param property the system property name
* @return the system property value or {@code null} if a security problem occurs
*/
public static String getProperty(final String property) {
return getProperty(property, NULL_SUPPLIER);
}
/**
* Gets a System property, defaulting to {@code null} if the property cannot be read.
*
* If a {@link SecurityException} is caught, the return value is {@code null}.
*
*
* @param property the system property name.
* @param defaultValue get this Supplier when the property is empty or throws SecurityException.
* @return the system property value or {@code null} if a security problem occurs
*/
static String getProperty(final String property, final Supplier defaultValue) {
try {
if (StringUtils.isEmpty(property)) {
return defaultValue.get();
}
final String value = System.getProperty(property);
return StringUtils.getIfEmpty(value, defaultValue);
} catch (final SecurityException ignore) {
// 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 defaultValue.get();
}
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getUserCountry() {
return getProperty(USER_COUNTRY);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getUserDir() {
return getProperty(USER_DIR);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getUserHome() {
return getProperty(USER_HOME);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getUserLanguage() {
return getProperty(USER_LANGUAGE);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getUserName() {
return getProperty(USER_NAME);
}
/**
* Gets the current value from the system properties map.
*
* Returns {@code null} if the property cannot be read due to a {@link SecurityException}.
*
*
* @return the current value from the system properties map.
*/
public static String getUserTimezone() {
return getProperty(USER_TIMEZONE);
}
}