| /* |
| * 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.lucene.util; |
| |
| |
| import java.util.StringTokenizer; |
| |
| |
| /** |
| * Some useful constants. |
| **/ |
| |
| public final class Constants { |
| private Constants() {} // can't construct |
| |
| /** JVM vendor info. */ |
| public static final String JVM_VENDOR = System.getProperty("java.vm.vendor"); |
| public static final String JVM_VERSION = System.getProperty("java.vm.version"); |
| public static final String JVM_NAME = System.getProperty("java.vm.name"); |
| public static final String JVM_SPEC_VERSION = System.getProperty("java.specification.version"); |
| |
| /** The value of <tt>System.getProperty("java.version")</tt>. **/ |
| public static final String JAVA_VERSION = System.getProperty("java.version"); |
| |
| /** The value of <tt>System.getProperty("os.name")</tt>. **/ |
| public static final String OS_NAME = System.getProperty("os.name"); |
| /** True iff running on Linux. */ |
| public static final boolean LINUX = OS_NAME.startsWith("Linux"); |
| /** True iff running on Windows. */ |
| public static final boolean WINDOWS = OS_NAME.startsWith("Windows"); |
| /** True iff running on SunOS. */ |
| public static final boolean SUN_OS = OS_NAME.startsWith("SunOS"); |
| /** True iff running on Mac OS X */ |
| public static final boolean MAC_OS_X = OS_NAME.startsWith("Mac OS X"); |
| /** True iff running on FreeBSD */ |
| public static final boolean FREE_BSD = OS_NAME.startsWith("FreeBSD"); |
| |
| public static final String OS_ARCH = System.getProperty("os.arch"); |
| public static final String OS_VERSION = System.getProperty("os.version"); |
| public static final String JAVA_VENDOR = System.getProperty("java.vendor"); |
| |
| private static final int JVM_MAJOR_VERSION; |
| private static final int JVM_MINOR_VERSION; |
| |
| /** True iff running on a 64bit JVM */ |
| public static final boolean JRE_IS_64BIT; |
| |
| static { |
| final StringTokenizer st = new StringTokenizer(JVM_SPEC_VERSION, "."); |
| JVM_MAJOR_VERSION = Integer.parseInt(st.nextToken()); |
| if (st.hasMoreTokens()) { |
| JVM_MINOR_VERSION = Integer.parseInt(st.nextToken()); |
| } else { |
| JVM_MINOR_VERSION = 0; |
| } |
| boolean is64Bit = false; |
| String datamodel = null; |
| try { |
| datamodel = System.getProperty("sun.arch.data.model"); |
| if (datamodel != null) { |
| is64Bit = datamodel.contains("64"); |
| } |
| } catch (SecurityException ex) {} |
| if (datamodel == null) { |
| if (OS_ARCH != null && OS_ARCH.contains("64")) { |
| is64Bit = true; |
| } else { |
| is64Bit = false; |
| } |
| } |
| JRE_IS_64BIT = is64Bit; |
| } |
| |
| public static final boolean JRE_IS_MINIMUM_JAVA8 = JVM_MAJOR_VERSION > 1 || (JVM_MAJOR_VERSION == 1 && JVM_MINOR_VERSION >= 8); |
| public static final boolean JRE_IS_MINIMUM_JAVA9 = JVM_MAJOR_VERSION > 1 || (JVM_MAJOR_VERSION == 1 && JVM_MINOR_VERSION >= 9); |
| |
| /** |
| * This is the internal Lucene version, including bugfix versions, recorded into each segment. |
| * @deprecated Use {@link Version#LATEST} |
| */ |
| @Deprecated |
| public static final String LUCENE_MAIN_VERSION = Version.LATEST.toString(); |
| |
| /** |
| * Don't use this constant because the name is not self-describing! |
| * @deprecated Use {@link Version#LATEST} |
| */ |
| @Deprecated |
| public static final String LUCENE_VERSION = Version.LATEST.toString(); |
| |
| } |