001    /**
002     * Copyright (c) 2000-2012 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 is64bit() {
063                    return _instance._64bit;
064            }
065    
066            public static boolean isIBM() {
067                    return _instance._ibm;
068            }
069    
070            public static boolean isJDK4() {
071                    if (JavaProps.getJavaClassVersion() >=
072                                    JavaProps.JAVA_CLASS_VERSION_JDK_4) {
073    
074                            return true;
075                    }
076                    else {
077                            return false;
078                    }
079            }
080    
081            public static boolean isJDK5() {
082                    if (JavaProps.getJavaClassVersion() >=
083                                    JavaProps.JAVA_CLASS_VERSION_JDK_5) {
084    
085                            return true;
086                    }
087                    else {
088                            return false;
089                    }
090            }
091    
092            public static boolean isJDK6() {
093                    if (JavaProps.getJavaClassVersion() >=
094                                    JavaProps.JAVA_CLASS_VERSION_JDK_6) {
095    
096                            return true;
097                    }
098                    else {
099                            return false;
100                    }
101            }
102    
103            public static boolean isJDK7() {
104                    if (JavaProps.getJavaClassVersion() >=
105                                    JavaProps.JAVA_CLASS_VERSION_JDK_7) {
106    
107                            return true;
108                    }
109                    else {
110                            return false;
111                    }
112            }
113    
114            private JavaProps() {
115                    _javaClassPath = System.getProperty("java.class.path");
116                    _javaClassVersion = Double.parseDouble(System.getProperty(
117                            "java.class.version"));
118                    _javaRuntimeVersion = System.getProperty("java.runtime.version");
119                    _javaSpecificationVersion = Double.parseDouble(System.getProperty(
120                            "java.specification.version"));
121                    _javaVendor = System.getProperty("java.vendor");
122                    _javaVersion = System.getProperty("java.version");
123                    _javaVmVersion = System.getProperty("java.vm.version");
124    
125                    _64bit = Validator.equals(
126                            "64", System.getProperty("sun.arch.data.model"));
127    
128                    if (_javaVendor != null) {
129                            _ibm = _javaVendor.startsWith("IBM");
130                    }
131    
132                    LogUtil.debug(_log, System.getProperties());
133            }
134    
135            private static Log _log = LogFactoryUtil.getLog(JavaProps.class);
136    
137            private static JavaProps _instance = new JavaProps();
138    
139            private boolean _64bit;
140            private boolean _ibm;
141            private String _javaClassPath;
142            private double _javaClassVersion;
143            private String _javaRuntimeVersion;
144            private double _javaSpecificationVersion;
145            private String _javaVendor;
146            private String _javaVersion;
147            private String _javaVmVersion;
148    
149    }