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Mockito mock objects library core API and implementation
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/*
 * Copyright (c) 2016 Mockito contributors
 * This program is made available under the terms of the MIT License.
 */
package org.mockito.internal.util;

import static org.mockito.internal.util.StringUtil.join;

import java.util.Locale;

public abstract class Platform {

    public static final String JAVA_VERSION = System.getProperty("java.specification.version");
    public static final String JVM_VERSION = System.getProperty("java.runtime.version");
    public static final String JVM_VENDOR = System.getProperty("java.vm.vendor");
    public static final String JVM_VENDOR_VERSION = System.getProperty("java.vm.version");
    public static final String JVM_NAME = System.getProperty("java.vm.name");
    public static final String JVM_INFO = System.getProperty("java.vm.info");
    public static final String OS_NAME = System.getProperty("os.name");
    public static final String OS_VERSION = System.getProperty("os.version");

    private Platform() {}

    public static boolean isAndroid() {
        return System.getProperty("java.vendor", "").toLowerCase(Locale.US).contains("android");
    }

    public static boolean isAndroidMockMakerRequired() {
        return Boolean.getBoolean("org.mockito.mock.android");
    }

    public static String describe() {
        String description =
                String.format(
                        "Java               : %s\n"
                                + "JVM vendor name    : %s\n"
                                + "JVM vendor version : %s\n"
                                + "JVM name           : %s\n"
                                + "JVM version        : %s\n"
                                + "JVM info           : %s\n"
                                + "OS name            : %s\n"
                                + "OS version         : %s\n",
                        JAVA_VERSION,
                        JVM_VENDOR,
                        JVM_VENDOR_VERSION,
                        JVM_NAME,
                        JVM_VERSION,
                        JVM_INFO,
                        OS_NAME,
                        OS_VERSION);
        if (isAndroid()) {
            description =
                    join(
                            "IMPORTANT INFORMATION FOR ANDROID USERS:",
                            "",
                            "The regular Byte Buddy mock makers cannot generate code on an Android VM!",
                            "To resolve this, please use the 'mockito-android' dependency for your application:",
                            "https://search.maven.org/artifact/org.mockito/mockito-android",
                            "",
                            description);
        }
        return description;
    }

    public static String warnForVM(
            String vmName1, String warnMessage1, String vmName2, String warnMessage2) {
        return warnForVM(JVM_NAME, vmName1, warnMessage1, vmName2, warnMessage2);
    }

    static String warnForVM(
            String current,
            String vmName1,
            String warnMessage1,
            String vmName2,
            String warnMessage2) {
        if (vmName1 != null && current.contains(vmName1)) {
            return warnMessage1;
        }
        if (vmName2 != null && current.contains(vmName2)) {
            return warnMessage2;
        }
        return "";
    }
}