001    /**
002     * Copyright (c) 2000-2011 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.util;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.log.LogUtil;
020    
021    /**
022     * @author Brian Wing Shun Chan
023     */
024    public class JavaProps {
025    
026            public static final double JAVA_CLASS_VERSION_JDK_4 = 48.0;
027    
028            public static final double JAVA_CLASS_VERSION_JDK_5 = 49.0;
029    
030            public static final double JAVA_CLASS_VERSION_JDK_6 = 50.0;
031    
032            public static final double JAVA_CLASS_VERSION_JDK_7 = 51.0;
033    
034            public static String getJavaClassPath() {
035                    return _instance._javaClassPath;
036            }
037    
038            public static double getJavaClassVersion() {
039                    return _instance._javaClassVersion;
040            }
041    
042            public static String getJavaRuntimeVersion() {
043                    return _instance._javaRuntimeVersion;
044            }
045    
046            public static double getJavaSpecificationVersion() {
047                    return _instance._javaSpecificationVersion;
048            }
049    
050            public static String getJavaVendor() {
051                    return _instance._javaVendor;
052            }
053    
054            public static String getJavaVersion() {
055                    return _instance._javaVersion;
056            }
057    
058            public static String getJavaVmVersion() {
059                    return _instance._javaVmVersion;
060            }
061    
062            public static boolean hasSunBug6291034() {
063                    return _instance._sunBug6291034;
064            }
065    
066            public static boolean is64bit() {
067                    return _instance._64bit;
068            }
069    
070            public static boolean isIBM() {
071                    return _instance._ibm;
072            }
073    
074            public static boolean isJDK4() {
075                    if (JavaProps.getJavaClassVersion() >=
076                                    JavaProps.JAVA_CLASS_VERSION_JDK_4) {
077    
078                            return true;
079                    }
080                    else {
081                            return false;
082                    }
083            }
084    
085            public static boolean isJDK5() {
086                    if (JavaProps.getJavaClassVersion() >=
087                                    JavaProps.JAVA_CLASS_VERSION_JDK_5) {
088    
089                            return true;
090                    }
091                    else {
092                            return false;
093                    }
094            }
095    
096            public static boolean isJDK6() {
097                    if (JavaProps.getJavaClassVersion() >=
098                                    JavaProps.JAVA_CLASS_VERSION_JDK_6) {
099    
100                            return true;
101                    }
102                    else {
103                            return false;
104                    }
105            }
106    
107            public static boolean isJDK7() {
108                    if (JavaProps.getJavaClassVersion() >=
109                                    JavaProps.JAVA_CLASS_VERSION_JDK_7) {
110    
111                            return true;
112                    }
113                    else {
114                            return false;
115                    }
116            }
117    
118            private JavaProps() {
119                    _javaClassPath = System.getProperty("java.class.path");
120                    _javaClassVersion = Double.parseDouble(System.getProperty(
121                            "java.class.version"));
122                    _javaRuntimeVersion = System.getProperty("java.runtime.version");
123                    _javaSpecificationVersion = Double.parseDouble(System.getProperty(
124                            "java.specification.version"));
125                    _javaVendor = System.getProperty("java.vendor");
126                    _javaVersion = System.getProperty("java.version");
127                    _javaVmVersion = System.getProperty("java.vm.version");
128    
129                    _64bit = Validator.equals(
130                            "64", System.getProperty("sun.arch.data.model"));
131    
132                    if (_javaVendor != null) {
133                            _ibm = _javaVendor.startsWith("IBM");
134                    }
135    
136                    LogUtil.debug(_log, System.getProperties());
137    
138                    if (_javaVersion.compareTo("1.5.0_06-") < 0) {
139                            _sunBug6291034 = true;
140                    }
141            }
142    
143            private static Log _log = LogFactoryUtil.getLog(JavaProps.class);
144    
145            private static JavaProps _instance = new JavaProps();
146    
147            private boolean _64bit;
148            private boolean _ibm;
149            private String _javaClassPath;
150            private double _javaClassVersion;
151            private String _javaRuntimeVersion;
152            private double _javaSpecificationVersion;
153            private String _javaVendor;
154            private String _javaVersion;
155            private String _javaVmVersion;
156            private boolean _sunBug6291034;
157    
158    }