org.eclipse.packager.rpm.OperatingSystem Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016, 2019 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0
 *
 * SPDX-License-Identifier: EPL-2.0
 */

package org.eclipse.packager.rpm;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

public enum OperatingSystem {
    UNKNOWN((short) 0, "unknown"),
    LINUX((short) 1, "Linux"),
    IRIX((short) 2, "Irix"),
    SUNOS_5((short) 3, "solaris, SunOS5"),
    SUNOS_4((short) 4, "SunOS, SunOS4"),
    AIX((short) 5, "AIX, AmigaOS"),
    HP_UX((short) 6, "hpux10, HP-UX"),
    OSF((short) 7, "OSF1, osf1, osf4.0, osf3.2"),
    FREEBSD((short) 8, "FreeBSD"),
    IRIX64((short) 10, "Irix64"),
    NEXTSTEP((short) 11, "NextStep"),
    BSD((short) 12, "BSD_OS, bsdi"),
    MACHTEN((short) 13, "machten"),
    CYGWIN32_NT((short) 14, "cygwin32"),
    CYGWIN32_95((short) 15, ""),
    UNIX_SV((short) 16, "MP_RAS"),
    MINT((short) 17, "MiNT, FreeMiNT"),
    OS_390((short) 18, "OS/390"),
    VM_ESA((short) 19, "VM/ESA, Linux/ESA"),
    LINUX_390((short) 20, "Linux/390, Linux/ESA"),
    MACOS_X((short) 21, "darwin, macosx");

    private static final Map MAP = new HashMap<>();

    private static final Map ALTMAP = new HashMap<>();

    static {
        for (final OperatingSystem os : OperatingSystem.values()) {
            MAP.put((int) os.value, os);
            ALTMAP.put(os.name().toLowerCase(), os);
            for (final String alias : getAliases(os).split(",\\s")) {
                ALTMAP.put(alias.toLowerCase(), os);
            }
        }
    }

    private static String getAliases(final OperatingSystem os) {
        return System.getProperty(OperatingSystem.class.getPackage().getName() + ".os." + os.name(), os.aliases);
    }

    private final short value;

    private final String aliases;

    OperatingSystem(final short value, final String aliases) {
        this.value = value;
        this.aliases = aliases;
    }

    public short getValue() {
        return this.value;
    }

    public static Optional fromValue(final int value) {
        return Optional.ofNullable(MAP.get(value));
    }

    public static Optional fromAlias(final String alias) {
        if (alias == null) {
            return Optional.empty();
        }

        return Optional.ofNullable(ALTMAP.get(alias.toLowerCase()));
    }
}