com.liferay.portal.kernel.util.JavaDetector.java Source code

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Here is the source code for com.liferay.portal.kernel.util.JavaDetector.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.util;

import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.log.LogUtil;

import java.util.Objects;

/**
 * @author Brian Wing Shun Chan
 */
public class JavaDetector {

    public static String getJavaClassPath() {
        return _javaDetector._javaClassPath;
    }

    public static double getJavaClassVersion() {
        return _javaDetector._javaClassVersion;
    }

    public static String getJavaRuntimeName() {
        return _javaDetector._javaRuntimeName;
    }

    public static String getJavaRuntimeVersion() {
        return _javaDetector._javaRuntimeVersion;
    }

    public static double getJavaSpecificationVersion() {
        return _javaDetector._javaSpecificationVersion;
    }

    public static String getJavaVendor() {
        return _javaDetector._javaVendor;
    }

    public static String getJavaVersion() {
        return _javaDetector._javaVersion;
    }

    public static String getJavaVmVersion() {
        return _javaDetector._javaVmVersion;
    }

    public static boolean is64bit() {
        return _javaDetector._64bit;
    }

    public static boolean isIBM() {
        return _javaDetector._ibm;
    }

    public static boolean isJDK7() {
        String javaVersion = getJavaVersion();

        if (javaVersion.startsWith(_JAVA_VERSION_JDK_7)) {
            return true;
        }

        return false;
    }

    public static boolean isJDK8() {
        String javaVersion = getJavaVersion();

        if (javaVersion.startsWith(_JAVA_VERSION_JDK_8)) {
            return true;
        }

        return false;
    }

    public static boolean isJDK11() {
        String javaVersion = getJavaVersion();

        if (javaVersion.startsWith(_JAVA_VERSION_JDK_11)) {
            return true;
        }

        return false;
    }

    public static boolean isOpenJDK() {
        return _javaDetector._openJDK;
    }

    public static boolean isOracle() {
        return _javaDetector._oracle;
    }

    protected JavaDetector() {
        _javaClassPath = System.getProperty("java.class.path");
        _javaClassVersion = GetterUtil.getDouble(System.getProperty("java.class.version"));
        _javaRuntimeName = System.getProperty("java.runtime.name");
        _javaRuntimeVersion = System.getProperty("java.runtime.version");
        _javaSpecificationVersion = GetterUtil.getDouble(System.getProperty("java.specification.version"));
        _javaVendor = System.getProperty("java.vendor");
        _javaVersion = System.getProperty("java.version");
        _javaVmVersion = System.getProperty("java.vm.version");

        _64bit = Objects.equals(System.getProperty("sun.arch.data.model"), "64");

        boolean oracle = false;

        if (_javaVendor != null) {
            _ibm = _javaVendor.startsWith("IBM");

            if (_javaVendor.startsWith("Oracle") || _javaVendor.startsWith("Sun")) {

                oracle = true;
            }
        } else {
            _ibm = false;
        }

        _oracle = oracle;

        if (_javaRuntimeName != null) {
            _openJDK = _javaRuntimeName.contains("OpenJDK");
        } else {
            _openJDK = false;
        }

        if (_log.isDebugEnabled()) {
            LogUtil.debug(_log, new SortedProperties(System.getProperties()));
        }
    }

    private static final String _JAVA_VERSION_JDK_7 = "1.7.";

    private static final String _JAVA_VERSION_JDK_8 = "1.8.";

    private static final String _JAVA_VERSION_JDK_11 = "11";

    private static final Log _log = LogFactoryUtil.getLog(JavaDetector.class);

    private static final JavaDetector _javaDetector = new JavaDetector();

    private final boolean _64bit;
    private final boolean _ibm;
    private final String _javaClassPath;
    private final double _javaClassVersion;
    private final String _javaRuntimeName;
    private final String _javaRuntimeVersion;
    private final double _javaSpecificationVersion;
    private final String _javaVendor;
    private final String _javaVersion;
    private final String _javaVmVersion;
    private final boolean _openJDK;
    private final boolean _oracle;

}