/redistributable/third-party/Lucene.Net/src/Lucene.Net/Util/Constants.cs
C# | 108 lines | 55 code | 17 blank | 36 comment | 7 complexity | f3c835c2c0481d52e084419fe114c6ea MD5 | raw file
Possible License(s): GPL-2.0, MPL-2.0-no-copyleft-exception
- /*
- * 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.
- */
- using System;
- using LucenePackage = Lucene.Net.LucenePackage;
- namespace Lucene.Net.Util
- {
-
- /// <summary> Some useful constants.
- ///
- ///
- /// </summary>
- /// <version> $Id: Constants.java 828327 2009-10-22 06:47:40Z uschindler $
- ///
- /// </version>
-
- public sealed class Constants
- {
- private Constants()
- {
- } // can't construct
-
- /// <summary>The value of <tt>System.getProperty("java.version")</tt>. *</summary>
- public static readonly System.String JAVA_VERSION = SupportClass.AppSettings.Get("java.version", "");
- /// <summary>True iff this is Java version 1.1. </summary>
- public static readonly bool JAVA_1_1 = JAVA_VERSION.StartsWith("1.1.");
- /// <summary>True iff this is Java version 1.2. </summary>
- public static readonly bool JAVA_1_2 = JAVA_VERSION.StartsWith("1.2.");
- /// <summary>True iff this is Java version 1.3. </summary>
- public static readonly bool JAVA_1_3 = JAVA_VERSION.StartsWith("1.3.");
-
- /// <summary>The value of <tt>System.getProperty("os.name")</tt>. *</summary>
- public static readonly System.String OS_NAME = GetEnvironmentVariable("OS","Windows_NT") ?? "Linux";
- /// <summary>True iff running on Linux. </summary>
- public static readonly bool LINUX = OS_NAME.StartsWith("Linux");
- /// <summary>True iff running on Windows. </summary>
- public static readonly bool WINDOWS = OS_NAME.StartsWith("Windows");
- /// <summary>True iff running on SunOS. </summary>
- public static readonly bool SUN_OS = OS_NAME.StartsWith("SunOS");
-
- public static readonly System.String OS_ARCH = GetEnvironmentVariable("PROCESSOR_ARCHITECTURE","x86");
- public static readonly System.String OS_VERSION = GetEnvironmentVariable("OS_VERSION", "?");
- public static readonly System.String JAVA_VENDOR = SupportClass.AppSettings.Get("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 bool JRE_IS_64BIT;
- // this method prevents inlining the final version constant in compiled
- // classes,
- // see: http://www.javaworld.com/community/node/3400
- private static System.String Ident(System.String s)
- {
- return s.ToString();
- }
- public static readonly System.String LUCENE_MAIN_VERSION = Ident("2.9.2");
-
- public static System.String LUCENE_VERSION;
- static Constants()
- {
- if (IntPtr.Size == 8)
- {
- JRE_IS_64BIT = true;// 64 bit machine
- }
- else if (IntPtr.Size == 4)
- {
- JRE_IS_64BIT = false;// 32 bit machine
- }
- LUCENE_VERSION = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();
- }
- #region MEDIUM-TRUST Support
- static string GetEnvironmentVariable(string variable, string defaultValueOnSecurityException)
- {
- try
- {
- if (variable == "OS_VERSION") return System.Environment.OSVersion.ToString();
- return System.Environment.GetEnvironmentVariable(variable);
- }
- catch (System.Security.SecurityException)
- {
- return defaultValueOnSecurityException;
- }
- }
- #endregion
- }
- }