package com.flaptor.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("4.0"); 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); } }