001    /**
002     * Copyright (c) 2000-present 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 JavaDetector {
025    
026            public static String getJavaClassPath() {
027                    return _instance._javaClassPath;
028            }
029    
030            public static double getJavaClassVersion() {
031                    return _instance._javaClassVersion;
032            }
033    
034            public static String getJavaRuntimeName() {
035                    return _instance._javaRuntimeName;
036            }
037    
038            public static String getJavaRuntimeVersion() {
039                    return _instance._javaRuntimeVersion;
040            }
041    
042            public static double getJavaSpecificationVersion() {
043                    return _instance._javaSpecificationVersion;
044            }
045    
046            public static String getJavaVendor() {
047                    return _instance._javaVendor;
048            }
049    
050            public static String getJavaVersion() {
051                    return _instance._javaVersion;
052            }
053    
054            public static String getJavaVmVersion() {
055                    return _instance._javaVmVersion;
056            }
057    
058            public static boolean is64bit() {
059                    return _instance._64bit;
060            }
061    
062            public static boolean isIBM() {
063                    return _instance._ibm;
064            }
065    
066            public static boolean isJDK7() {
067                    String javaVersion = getJavaVersion();
068    
069                    if (javaVersion.startsWith(_JAVA_VERSION_JDK_7)) {
070                            return true;
071                    }
072                    else {
073                            return false;
074                    }
075            }
076    
077            public static boolean isOpenJDK() {
078                    return _instance._openJDK;
079            }
080    
081            public static boolean isOracle() {
082                    return _instance._oracle;
083            }
084    
085            protected JavaDetector() {
086                    _javaClassPath = System.getProperty("java.class.path");
087                    _javaClassVersion = GetterUtil.getDouble(
088                            System.getProperty("java.class.version"));
089                    _javaRuntimeName = System.getProperty("java.runtime.name");
090                    _javaRuntimeVersion = System.getProperty("java.runtime.version");
091                    _javaSpecificationVersion = GetterUtil.getDouble(
092                            System.getProperty("java.specification.version"));
093                    _javaVendor = System.getProperty("java.vendor");
094                    _javaVersion = System.getProperty("java.version");
095                    _javaVmVersion = System.getProperty("java.vm.version");
096    
097                    _64bit = Validator.equals(
098                            "64", System.getProperty("sun.arch.data.model"));
099    
100                    boolean oracle = false;
101    
102                    if (_javaVendor != null) {
103                            _ibm = _javaVendor.startsWith("IBM");
104    
105                            if (_javaVendor.startsWith("Oracle") ||
106                                    _javaVendor.startsWith("Sun")) {
107    
108                                    oracle = true;
109                            }
110                    }
111                    else {
112                            _ibm = false;
113                    }
114    
115                    _oracle = oracle;
116    
117                    if (_javaRuntimeName != null) {
118                            _openJDK = _javaRuntimeName.contains("OpenJDK");
119                    }
120                    else {
121                            _openJDK = false;
122                    }
123    
124                    if (_log.isDebugEnabled()) {
125                            LogUtil.debug(_log, new SortedProperties(System.getProperties()));
126                    }
127            }
128    
129            private static final String _JAVA_VERSION_JDK_7 = "1.7.";
130    
131            private static final Log _log = LogFactoryUtil.getLog(JavaDetector.class);
132    
133            private static final JavaDetector _instance = new JavaDetector();
134    
135            private final boolean _64bit;
136            private final boolean _ibm;
137            private final String _javaClassPath;
138            private final double _javaClassVersion;
139            private final String _javaRuntimeName;
140            private final String _javaRuntimeVersion;
141            private final double _javaSpecificationVersion;
142            private final String _javaVendor;
143            private final String _javaVersion;
144            private final String _javaVmVersion;
145            private final boolean _openJDK;
146            private final boolean _oracle;
147    
148    }