1f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project/* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved. 2f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 3f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * This program and the accompanying materials are made available under 4f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * the terms of the Common Public License v1.0 which accompanies this distribution, 5f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * and is available at http://www.eclipse.org/legal/cpl-v10.html 6f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 7f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * $Id: IJREVersion.java,v 1.1.1.1.2.1 2004/07/10 03:34:52 vlad_r Exp $ 8f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 9f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectpackage com.vladium.util; 10f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 11f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project// ---------------------------------------------------------------------------- 12f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project/** 13f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * A constant collection to detect the current JRE version. Note that this code 14f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * is more sophisticated then a mere check of "java.version" or "java.class.version" 15f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * and similar system properties because some JVMs allow overriding those 16f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * by the user (e.g., from the command line). This implementation relies on 17f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * the core classes only and tries to minimize the number of security-sensitive 18f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * methods it uses.<P> 19f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 20f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * This interface is supported in Java 1.1+ and should be compiled with class 21f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * version stamp 45.3 (-target 1.1). 22f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 23f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * @author Vlad Roubtsov, (C) 2003 24f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 25f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectpublic 26f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectinterface IJREVersion 27f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project{ 28f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // public: ................................................................ 29f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 30f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 'true' iff the current runtime version is 1.2 or later */ 31f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project boolean JRE_1_2_PLUS = _JREVersion._JRE_1_2_PLUS; // static final but not inlinable 32f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 'true' iff the current runtime version is 1.3 or later */ 33f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project boolean JRE_1_3_PLUS = _JREVersion._JRE_1_3_PLUS; // static final but not inlinable 34f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 'true' iff the current runtime version is 1.4 or later */ 35f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project boolean JRE_1_4_PLUS = _JREVersion._JRE_1_4_PLUS; // static final but not inlinable 36f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 37f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // supporting Java 1.5 is trivial... 38f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 39f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project boolean JRE_SUN_SIGNAL_COMPATIBLE = _JREVersion._JRE_SUN_SIGNAL_COMPATIBLE; 40f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 41f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /* 42f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * Use a dummy nested class to fake a static initializer for the outer 43f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * interface (I want IJREVersion as an interface and not a class so that 44f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * all JRE_XXX constants could be imported via "implements"). 45f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 46f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project abstract class _JREVersion 47f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 48f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project static final boolean _JRE_1_2_PLUS; // set in <clinit> 49f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project static final boolean _JRE_1_3_PLUS; // set in <clinit> 50f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project static final boolean _JRE_1_4_PLUS; // set in <clinit> 51f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 52f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project static final boolean _JRE_SUN_SIGNAL_COMPATIBLE; // set in <clinit> 53f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 54f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project private _JREVersion () {} // prevent subclassing 55f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 56f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project static 57f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 58f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project _JRE_1_2_PLUS = ((SecurityManager.class.getModifiers () & 0x0400) == 0); 59f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 60f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project boolean temp = false; 61f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (_JRE_1_2_PLUS) 62f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 63f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project try 64f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 65f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project StrictMath.abs (1.0); 66f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project temp = true; 67f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 68f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project catch (Error ignore) {} 69f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 70f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project _JRE_1_3_PLUS = temp; 71f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 72f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (temp) 73f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 74f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project temp = false; 75f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project try 76f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 77f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project " ".subSequence (0, 0); 78f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project temp = true; 79f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 80f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project catch (NoSuchMethodError ignore) {} 81f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 82f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project _JRE_1_4_PLUS = temp; 83f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 84f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project temp = false; 85f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 86f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project _JRE_SUN_SIGNAL_COMPATIBLE = temp; 87f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 88f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 89f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } // end of nested class 90f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 91f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project} // end of interface 92f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project// ---------------------------------------------------------------------------- 93f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 94