org.apache.rocketmq.shaded.ch.qos.logback.core.util.EnvUtil Maven / Gradle / Ivy
/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2015, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package org.apache.rocketmq.shaded.ch.qos.logback.core.util;
import java.util.ArrayList;
import java.util.List;
/**
* @author Ceki Gülcü
*/
public class EnvUtil {
static private boolean isJDK_N_OrHigher(int n) {
List versionList = new ArrayList();
// this code should work at least until JDK 10 (assuming n parameter is
// always 6 or more)
for (int i = 0; i < 5; i++) {
versionList.add("1." + (n + i));
}
String javaVersion = System.getProperty("java.version");
if (javaVersion == null) {
return false;
}
for (String v : versionList) {
if (javaVersion.startsWith(v))
return true;
}
return false;
}
static public boolean isJDK5() {
return isJDK_N_OrHigher(5);
}
static public boolean isJDK6OrHigher() {
return isJDK_N_OrHigher(6);
}
static public boolean isJDK7OrHigher() {
return isJDK_N_OrHigher(7);
}
static public boolean isJaninoAvailable() {
ClassLoader classLoader = EnvUtil.class.getClassLoader();
try {
Class bindingClass = classLoader.loadClass("org.codehaus.janino.ScriptEvaluator");
return (bindingClass != null);
} catch (ClassNotFoundException e) {
return false;
}
}
public static boolean isWindows() {
String os = System.getProperty("os.name");
return os.startsWith("Windows");
}
}