| package org.apache.lucene.util; |
| |
| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" and |
| * "Apache Lucene" must not be used to endorse or promote products |
| * derived from this software without prior written permission. For |
| * written permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * "Apache Lucene", nor may "Apache" appear in their name, without |
| * prior written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| /** |
| * Some useful constants. |
| * |
| * @author Doug Cutting |
| * @version $Id$ |
| **/ |
| |
| 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 Windows. */ |
| 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"); |
| } |