| package org.apache.lucene.util; |
| |
| /** |
| * 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. |
| */ |
| |
| import org.apache.lucene.LucenePackage; |
| |
| /** |
| * Some useful constants. |
| **/ |
| |
| public final class Constants { |
| private Constants() {} // can't construct |
| |
| /** The value of <tt>System.getProperty("java.version")<tt>. **/ |
| public static final String JAVA_VERSION = System.getProperty("java.version"); |
| /** True iff this is Java version 1.1. */ |
| public static final boolean JAVA_1_1 = JAVA_VERSION.startsWith("1.1."); |
| /** True iff this is Java version 1.2. */ |
| public static final boolean JAVA_1_2 = JAVA_VERSION.startsWith("1.2."); |
| /** True iff this is Java version 1.3. */ |
| public static final boolean JAVA_1_3 = JAVA_VERSION.startsWith("1.3."); |
| |
| /** 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"); |
| |
| 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"); |
| |
| // NOTE: this logic may not be correct; if you know of a |
| // more reliable approach please raise it on java-dev! |
| public static final boolean JRE_IS_64BIT; |
| static { |
| String x = System.getProperty("sun.arch.data.model"); |
| if (x != null) { |
| JRE_IS_64BIT = x.indexOf("64") != -1; |
| } else { |
| if (OS_ARCH != null && OS_ARCH.indexOf("64") != -1) { |
| JRE_IS_64BIT = true; |
| } else { |
| JRE_IS_64BIT = false; |
| } |
| } |
| } |
| |
| // this method prevents inlining the final version constant in compiled classes, |
| // see: http://www.javaworld.com/community/node/3400 |
| private static String ident(final String s) { |
| return s.toString(); |
| } |
| |
| // NOTE: we track per-segment version as a String with the "X.Y" format, e.g. |
| // "4.0", "3.1", "3.0". Therefore when we change this constant, we should keep |
| // the format. |
| public static final String LUCENE_MAIN_VERSION = ident("3.5"); |
| |
| public static final String LUCENE_VERSION; |
| static { |
| Package pkg = LucenePackage.get(); |
| String v = (pkg == null) ? null : pkg.getImplementationVersion(); |
| if (v == null) { |
| v = LUCENE_MAIN_VERSION + "-SNAPSHOT"; |
| } else if (!v.startsWith(LUCENE_MAIN_VERSION)) { |
| v = LUCENE_MAIN_VERSION + "-SNAPSHOT " + v; |
| } |
| LUCENE_VERSION = ident(v); |
| } |
| } |