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A useful utility library for java programmer using google protobuf.
/*
* Copyright 2002-2007 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.baidu.bjf.remoting.protobuf.utils;
import java.util.Locale;
/**
* Condition that tests the OS type.
*/
public final class OS {
private static final String FAMILY_OS_400 = "os/400";
private static final String FAMILY_Z_OS = "z/os";
private static final String FAMILY_WIN9X = "win9x";
private static final String FAMILY_OPENVMS = "openvms";
private static final String FAMILY_UNIX = "unix";
private static final String FAMILY_TANDEM = "tandem";
private static final String FAMILY_MAC = "mac";
private static final String FAMILY_DOS = "dos";
private static final String FAMILY_NETWARE = "netware";
private static final String FAMILY_OS_2 = "os/2";
private static final String FAMILY_WINDOWS = "windows";
private static final String OS_NAME = System.getProperty("os.name").toLowerCase(Locale.US);
private static final String OS_ARCH = System.getProperty("os.arch").toLowerCase(Locale.US);
private static final String OS_VERSION = System.getProperty("os.version").toLowerCase(Locale.US);
private static final String PATH_SEP = System.getProperty("path.separator");
/**
* Default constructor
*/
private OS() {
}
/**
* Determines if the OS on which Ant is executing matches the given OS family. * Possible values:
*
* - dos
* - mac
* - netware
* - os/2
* - tandem
* - unix
* - windows
* - win9x
* - z/os
* - os/400
*
*
* @param family the family to check for
* @return true if the OS matches
*/
private static boolean isFamily(final String family) {
return isOs(family, null, null, null);
}
public static boolean isFamilyDOS() {
return isFamily(FAMILY_DOS);
}
public static boolean isFamilyMac() {
return isFamily(FAMILY_MAC);
}
public static boolean isFamilyNetware() {
return isFamily(FAMILY_NETWARE);
}
public static boolean isFamilyOS2() {
return isFamily(FAMILY_OS_2);
}
public static boolean isFamilyTandem() {
return isFamily(FAMILY_TANDEM);
}
public static boolean isFamilyUnix() {
return isFamily(FAMILY_UNIX);
}
public static boolean isFamilyWindows() {
return isFamily(FAMILY_WINDOWS);
}
public static boolean isFamilyWin9x() {
return isFamily(FAMILY_WIN9X);
}
public static boolean isFamilyZOS() {
return isFamily(FAMILY_Z_OS);
}
public static boolean isFamilyOS400() {
return isFamily(FAMILY_OS_400);
}
public static boolean isFamilyOpenVms() {
return isFamily(FAMILY_OPENVMS);
}
/**
* Determines if the OS on which Ant is executing matches the given OS name.
*
* @param name the OS name to check for
* @return true if the OS matches
*/
public static boolean isName(final String name) {
return isOs(null, name, null, null);
}
/**
* Determines if the OS on which Ant is executing matches the given OS architecture.
*
* @param arch the OS architecture to check for
* @return true if the OS matches
*/
public static boolean isArch(final String arch) {
return isOs(null, null, arch, null);
}
/**
* Determines if the OS on which Ant is executing matches the given OS version.
*
* @param version the OS version to check for
* @return true if the OS matches
*/
public static boolean isVersion(final String version) {
return isOs(null, null, null, version);
}
/**
* Determines if the OS on which Ant is executing matches the given OS family, name, architecture and version
*
* @param family The OS family
* @param name The OS name
* @param arch The OS architecture
* @param version The OS version
* @return true if the OS matches
*/
public static boolean isOs(final String family, final String name, final String arch, final String version) {
boolean retValue = false;
if (family != null || name != null || arch != null || version != null) {
boolean isFamily = true;
boolean isName = true;
boolean isArch = true;
boolean isVersion = true;
if (family != null) {
if (family.equals(FAMILY_WINDOWS)) {
isFamily = OS_NAME.indexOf(FAMILY_WINDOWS) > -1;
} else if (family.equals(FAMILY_OS_2)) {
isFamily = OS_NAME.indexOf(FAMILY_OS_2) > -1;
} else if (family.equals(FAMILY_NETWARE)) {
isFamily = OS_NAME.indexOf(FAMILY_NETWARE) > -1;
} else if (family.equals(FAMILY_DOS)) {
isFamily = PATH_SEP.equals(";") && !isFamily(FAMILY_NETWARE);
} else if (family.equals(FAMILY_MAC)) {
isFamily = OS_NAME.indexOf(FAMILY_MAC) > -1;
} else if (family.equals(FAMILY_TANDEM)) {
isFamily = OS_NAME.indexOf("nonstop_kernel") > -1;
} else if (family.equals(FAMILY_UNIX)) {
isFamily = PATH_SEP.equals(":") && !isFamily(FAMILY_OPENVMS)
&& (!isFamily(FAMILY_MAC) || OS_NAME.endsWith("x"));
} else if (family.equals(FAMILY_WIN9X)) {
isFamily = isFamily(FAMILY_WINDOWS) && (OS_NAME.indexOf("95") >= 0 || OS_NAME.indexOf("98") >= 0
|| OS_NAME.indexOf("me") >= 0 || OS_NAME.indexOf("ce") >= 0);
} else if (family.equals(FAMILY_Z_OS)) {
isFamily = OS_NAME.indexOf(FAMILY_Z_OS) > -1 || OS_NAME.indexOf("os/390") > -1;
} else if (family.equals(FAMILY_OS_400)) {
isFamily = OS_NAME.indexOf(FAMILY_OS_400) > -1;
} else if (family.equals(FAMILY_OPENVMS)) {
isFamily = OS_NAME.indexOf(FAMILY_OPENVMS) > -1;
} else {
throw new IllegalArgumentException("Don\'t know how to detect os family \"" + family + "\"");
}
}
if (name != null) {
isName = name.equals(OS_NAME);
}
if (arch != null) {
isArch = arch.equals(OS_ARCH);
}
if (version != null) {
isVersion = version.equals(OS_VERSION);
}
retValue = isFamily && isName && isArch && isVersion;
}
return retValue;
}
}