sun.security.action.GetPropertyAction Java Examples

/**
 * Return the value of the boolean System property propName.
 *
 * Note use of doPrivileged(). Do make accessible to applications.
 */
static boolean getBooleanProperty(String propName, boolean defaultValue) {
    // if set, require value of either true or false
    String b = AccessController.doPrivileged(
            new GetPropertyAction(propName));
    if (b == null) {
        return defaultValue;
    } else if (b.equalsIgnoreCase("false")) {
        return false;
    } else if (b.equalsIgnoreCase("true")) {
        return true;
    } else {
        throw new RuntimeException("Value of " + propName
            + " must either be 'true' or 'false'");
    }
}
 

private void setWarningString() {
    warningString = null;
    SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        try {
            sm.checkPermission(SecurityConstants.AWT.TOPLEVEL_WINDOW_PERMISSION);
        } catch (SecurityException se) {
            // make sure the privileged action is only
            // for getting the property! We don't want the
            // above checkPermission call to always succeed!
            warningString = AccessController.doPrivileged(
                  new GetPropertyAction("awt.appletWarning",
                                        "Java Applet Window"));
        }
    }
}
 

static boolean currentMacOSXVersionMatchesGivenVersionRange(final int version, final boolean inclusive, final boolean matchBelow, final boolean matchAbove) {
    // split the "10.x.y" version number
    String osVersion = AccessController.doPrivileged(new GetPropertyAction("os.version"));
    String[] fragments = osVersion.split("\\.");

    // sanity check the "10." part of the version
    if (!fragments[0].equals("10")) return false;
    if (fragments.length < 2) return false;

    // check if os.version matches the given version using the given match method
    try {
        int minorVers = Integer.parseInt(fragments[1]);

        if (inclusive && minorVers == version) return true;
        if (matchBelow && minorVers < version) return true;
        if (matchAbove && minorVers > version) return true;

    } catch (NumberFormatException e) {
        // was not an integer
    }
    return false;
}
 

/**
 * Determines if the application doesn't mind if the mechanism obtains
 * the required credentials from outside of the current Subject. Our
 * Kerberos v5 mechanism would do a JAAS login on behalf of the
 * application if this were the case.
 *
 * The application indicates this by explicitly setting the system
 * property javax.security.auth.useSubjectCredsOnly to false.
 */
public static boolean useSubjectCredsOnly(GSSCaller caller) {

    // HTTP/SPNEGO doesn't use the standard JAAS framework. Instead, it
    // uses the java.net.Authenticator style, therefore always return
    // false here.
    if (caller instanceof HttpCaller) {
        return false;
    }
    /*
     * Don't use GetBooleanAction because the default value in the JRE
     * (when this is unset) has to treated as true.
     */
    String propValue = AccessController.doPrivileged(
            new GetPropertyAction("javax.security.auth.useSubjectCredsOnly",
            "true"));
    /*
     * This property has to be explicitly set to "false". Invalid
     * values should be ignored and the default "true" assumed.
     */
    return (!propValue.equalsIgnoreCase("false"));
}
 

/**
 * Determines if the application doesn't mind if the mechanism obtains
 * the required credentials from outside of the current Subject. Our
 * Kerberos v5 mechanism would do a JAAS login on behalf of the
 * application if this were the case.
 *
 * The application indicates this by explicitly setting the system
 * property javax.security.auth.useSubjectCredsOnly to false.
 */
public static boolean useSubjectCredsOnly(GSSCaller caller) {

    // HTTP/SPNEGO doesn't use the standard JAAS framework. Instead, it
    // uses the java.net.Authenticator style, therefore always return
    // false here.
    if (caller instanceof HttpCaller) {
        return false;
    }
    /*
     * Don't use GetBooleanAction because the default value in the JRE
     * (when this is unset) has to treated as true.
     */
    String propValue = AccessController.doPrivileged(
            new GetPropertyAction("javax.security.auth.useSubjectCredsOnly",
            "true"));
    /*
     * This property has to be explicitly set to "false". Invalid
     * values should be ignored and the default "true" assumed.
     */
    return (!propValue.equalsIgnoreCase("false"));
}
 

static boolean currentMacOSXVersionMatchesGivenVersionRange(final int version, final boolean inclusive, final boolean matchBelow, final boolean matchAbove) {
    // split the "10.x.y" version number
    String osVersion = AccessController.doPrivileged(new GetPropertyAction("os.version"));
    String[] fragments = osVersion.split("\\.");

    // sanity check the "10." part of the version
    if (!fragments[0].equals("10")) return false;
    if (fragments.length < 2) return false;

    // check if os.version matches the given version using the given match method
    try {
        int minorVers = Integer.parseInt(fragments[1]);

        if (inclusive && minorVers == version) return true;
        if (matchBelow && minorVers < version) return true;
        if (matchAbove && minorVers > version) return true;

    } catch (NumberFormatException e) {
        // was not an integer
    }
    return false;
}
 

WindowsFileSystem(WindowsFileSystemProvider provider,
                  String dir)
{
    this.provider = provider;

    // parse default directory and check it is absolute
    WindowsPathParser.Result result = WindowsPathParser.parse(dir);

    if ((result.type() != WindowsPathType.ABSOLUTE) &&
        (result.type() != WindowsPathType.UNC))
        throw new AssertionError("Default directory is not an absolute path");
    this.defaultDirectory = result.path();
    this.defaultRoot = result.root();

    PrivilegedAction<String> pa = new GetPropertyAction("os.version");
    String osversion = AccessController.doPrivileged(pa);
    String[] vers = Util.split(osversion, '.');
    int major = Integer.parseInt(vers[0]);
    int minor = Integer.parseInt(vers[1]);

    // symbolic links available on Vista and newer
    supportsLinks = (major >= 6);

    // enumeration of data streams available on Windows Server 2003 and newer
    supportsStreamEnumeration = (major >= 6) || (major == 5 && minor >= 2);
}
 

private static Locale initDefault() {
    String language, region, script, country, variant;
    Properties props = GetPropertyAction.privilegedGetProperties();
    language = props.getProperty("user.language", "en");
    // for compatibility, check for old user.region property
    region = props.getProperty("user.region");
    if (region != null) {
        // region can be of form country, country_variant, or _variant
        int i = region.indexOf('_');
        if (i >= 0) {
            country = region.substring(0, i);
            variant = region.substring(i + 1);
        } else {
            country = region;
            variant = "";
        }
        script = "";
    } else {
        script = props.getProperty("user.script", "");
        country = props.getProperty("user.country", "");
        variant = props.getProperty("user.variant", "");
    }

    return getInstance(language, script, country, variant, null);
}
 

private static Locale initDefault(Locale.Category category) {
    return getInstance(
        AccessController.doPrivileged(
            new GetPropertyAction(category.languageKey, defaultLocale.getLanguage())),
        AccessController.doPrivileged(
            new GetPropertyAction(category.scriptKey, defaultLocale.getScript())),
        AccessController.doPrivileged(
            new GetPropertyAction(category.countryKey, defaultLocale.getCountry())),
        AccessController.doPrivileged(
            new GetPropertyAction(category.variantKey, defaultLocale.getVariant())),
        null);
}
 

/**
 * Returned Shift_JIS Charset name is OS dependent
 */
private static String getSJISName() {
    String osName = AccessController.doPrivileged(
        new GetPropertyAction("os.name"));
    if (osName.equals("Solaris") || osName.equals("SunOS"))
        return("PCK");
    else if (osName.startsWith("Windows"))
        return("windows-31J");
    else
        return("Shift_JIS");
}
 

/**
 * Returns the name of the <code>LookAndFeel</code> class that implements
 * the native system look and feel if there is one, otherwise
 * the name of the default cross platform <code>LookAndFeel</code>
 * class. This value can be overriden by setting the
 * <code>swing.systemlaf</code> system property.
 *
 * @return the <code>String</code> of the <code>LookAndFeel</code>
 *          class
 *
 * @see #setLookAndFeel
 * @see #getCrossPlatformLookAndFeelClassName
 */
public static String getSystemLookAndFeelClassName() {
    String systemLAF = AccessController.doPrivileged(
                         new GetPropertyAction("swing.systemlaf"));
    if (systemLAF != null) {
        return systemLAF;
    }
    OSInfo.OSType osType = AccessController.doPrivileged(OSInfo.getOSTypeAction());
    if (osType == OSInfo.OSType.WINDOWS) {
        return "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    } else {
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        if (toolkit instanceof SunToolkit) {
            SunToolkit suntk = (SunToolkit)toolkit;
            String desktop = suntk.getDesktop();
            boolean gtkAvailable = suntk.isNativeGTKAvailable();
            if ("gnome".equals(desktop) && gtkAvailable) {
                return "com.sun.java.swing.plaf.gtk.GTKLookAndFeel";
            }
        }
        if (osType == OSInfo.OSType.MACOSX) {
            if (toolkit.getClass() .getName()
                                   .equals("sun.lwawt.macosx.LWCToolkit")) {
                return "com.apple.laf.AquaLookAndFeel";
            }
        }
        if (osType == OSInfo.OSType.SOLARIS) {
            return "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
        }
    }
    return getCrossPlatformLookAndFeelClassName();
}
 

/**
 * Returns the default FileSystemProvider.
 */
public static FileSystemProvider create() {
    String osname = AccessController
        .doPrivileged(new GetPropertyAction("os.name"));
    if (osname.equals("SunOS"))
        return createProvider("sun.nio.fs.SolarisFileSystemProvider");
    if (osname.equals("Linux"))
        return createProvider("sun.nio.fs.LinuxFileSystemProvider");
    if (osname.contains("OS X"))
        return createProvider("sun.nio.fs.MacOSXFileSystemProvider");
    if (osname.equals("AIX"))
        return createProvider("sun.nio.fs.AixFileSystemProvider");
    throw new AssertionError("Platform not recognized");
}
 

/**
 * Return the theme currently being used by <code>MetalLookAndFeel</code>.
 * If the current theme is {@code null}, the default theme is created.
 *
 * @return the current theme
 * @see #setCurrentTheme
 * @since 1.5
 */
public static MetalTheme getCurrentTheme() {
    MetalTheme currentTheme;
    AppContext context = AppContext.getAppContext();
    currentTheme = (MetalTheme) context.get( "currentMetalTheme" );
    if (currentTheme == null) {
        // This will happen in two cases:
        // . When MetalLookAndFeel is first being initialized.
        // . When a new AppContext has been created that hasn't
        //   triggered UIManager to load a LAF. Rather than invoke
        //   a method on the UIManager, which would trigger the loading
        //   of a potentially different LAF, we directly set the
        //   Theme here.
        if (useHighContrastTheme()) {
            currentTheme = new MetalHighContrastTheme();
        }
        else {
            // Create the default theme. We prefer Ocean, but will
            // use DefaultMetalTheme if told to.
            String theme = AccessController.doPrivileged(
                           new GetPropertyAction("swing.metalTheme"));
            if ("steel".equals(theme)) {
                currentTheme = new DefaultMetalTheme();
            }
            else {
                currentTheme = new OceanTheme();
            }
        }
        setCurrentTheme(currentTheme);
    }
    return currentTheme;
}
 

private static boolean useSystemAAFontSettings() {
    if (!checkedSystemAAFontSettings) {
        useSystemAAFontSettings = true; /* initially set this true */
        String systemAAFonts = null;
        Toolkit tk = Toolkit.getDefaultToolkit();
        if (tk instanceof SunToolkit) {
            systemAAFonts =
                AccessController.doPrivileged(
                     new GetPropertyAction("awt.useSystemAAFontSettings"));
        }
        if (systemAAFonts != null) {
            useSystemAAFontSettings =
                Boolean.valueOf(systemAAFonts).booleanValue();
            /* If it is anything other than "true", then it may be
             * a hint name , or it may be "off, "default", etc.
             */
            if (!useSystemAAFontSettings) {
                desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
            }
        }
        /* If its still true, apply the extra condition */
        if (useSystemAAFontSettings) {
             useSystemAAFontSettings = lastExtraCondition;
        }
        checkedSystemAAFontSettings = true;
    }
    return useSystemAAFontSettings;
}
 

/**
 * Returns true if <code>setTransferHandler</code> should change the
 * <code>DropTarget</code>.
 */
private static boolean getSuppressDropTarget() {
    if (!checkedSuppressDropSupport) {
        suppressDropSupport = Boolean.valueOf(
            AccessController.doPrivileged(
                new GetPropertyAction("suppressSwingDropSupport")));
        checkedSuppressDropSupport = true;
    }
    return suppressDropSupport;
}
 

private static int getDefaultThreadPoolInitialSize() {
    String propValue = AccessController.doPrivileged(new
        GetPropertyAction(DEFAULT_THREAD_POOL_INITIAL_SIZE));
    if (propValue != null) {
        try {
            return Integer.parseInt(propValue);
        } catch (NumberFormatException x) {
            throw new Error("Value of property '" + DEFAULT_THREAD_POOL_INITIAL_SIZE +
                "' is invalid: " + x);
        }
    }
    return -1;
}
 

/**
 * Returns an implementation of a {@code ProviderFactory} which
 * creates instances of Providers.
 *
 * The created Provider instances will be linked to all appropriate
 * and enabled system-defined tracing mechanisms in the JDK.
 *
 * @return a {@code ProviderFactory} that is used to create Providers.
 */
public static ProviderFactory getDefaultFactory() {
    HashSet<ProviderFactory> factories = new HashSet<ProviderFactory>();

    // Try to instantiate a DTraceProviderFactory
    String prop = AccessController.doPrivileged(
        new GetPropertyAction("com.sun.tracing.dtrace"));

    if ( (prop == null || !prop.equals("disable")) &&
         DTraceProviderFactory.isSupported() ) {
        factories.add(new DTraceProviderFactory());
    }

    // Try to instantiate an output stream factory
    prop = AccessController.doPrivileged(
        new GetPropertyAction("sun.tracing.stream"));
    if (prop != null) {
        for (String spec : prop.split(",")) {
            PrintStream ps = getPrintStreamFromSpec(spec);
            if (ps != null) {
                factories.add(new PrintStreamProviderFactory(ps));
            }
        }
    }

    // See how many factories we instantiated, and return an appropriate
    // factory that encapsulates that.
    if (factories.size() == 0) {
        return new NullProviderFactory();
    } else if (factories.size() == 1) {
        return factories.toArray(new ProviderFactory[1])[0];
    } else {
        return new MultiplexProviderFactory(factories);
    }
}
 

static boolean atBugLevel(String bl) {              // package-private
    if (bugLevel == null) {
        if (!sun.misc.VM.isBooted())
            return false;
        String value = AccessController.doPrivileged(
            new GetPropertyAction("sun.nio.ch.bugLevel"));
        bugLevel = (value != null) ? value : "";
    }
    return bugLevel.equals(bl);
}
 

/**
 * Return the theme currently being used by <code>MetalLookAndFeel</code>.
 * If the current theme is {@code null}, the default theme is created.
 *
 * @return the current theme
 * @see #setCurrentTheme
 * @since 1.5
 */
public static MetalTheme getCurrentTheme() {
    MetalTheme currentTheme;
    AppContext context = AppContext.getAppContext();
    currentTheme = (MetalTheme) context.get( "currentMetalTheme" );
    if (currentTheme == null) {
        // This will happen in two cases:
        // . When MetalLookAndFeel is first being initialized.
        // . When a new AppContext has been created that hasn't
        //   triggered UIManager to load a LAF. Rather than invoke
        //   a method on the UIManager, which would trigger the loading
        //   of a potentially different LAF, we directly set the
        //   Theme here.
        if (useHighContrastTheme()) {
            currentTheme = new MetalHighContrastTheme();
        }
        else {
            // Create the default theme. We prefer Ocean, but will
            // use DefaultMetalTheme if told to.
            String theme = AccessController.doPrivileged(
                           new GetPropertyAction("swing.metalTheme"));
            if ("steel".equals(theme)) {
                currentTheme = new DefaultMetalTheme();
            }
            else {
                currentTheme = new OceanTheme();
            }
        }
        setCurrentTheme(currentTheme);
    }
    return currentTheme;
}
 

public WinNTFileSystem() {
    slash = AccessController.doPrivileged(
        new GetPropertyAction("file.separator")).charAt(0);
    semicolon = AccessController.doPrivileged(
        new GetPropertyAction("path.separator")).charAt(0);
    altSlash = (this.slash == '\\') ? '/' : '\\';
}
 

static boolean atBugLevel(String bl) {              // package-private
    if (bugLevel == null) {
        if (!sun.misc.VM.isBooted())
            return false;
        String value = AccessController.doPrivileged(
            new GetPropertyAction("sun.nio.ch.bugLevel"));
        bugLevel = (value != null) ? value : "";
    }
    return bugLevel.equals(bl);
}
 

@Override
FileTypeDetector getFileTypeDetector() {
    Path userMimeTypes = Paths.get(AccessController.doPrivileged(
        new GetPropertyAction("user.home")), ".mime.types");
    Path etcMimeTypes = Paths.get("/etc/mime.types");

    return chain(new GnomeFileTypeDetector(),
                 new MimeTypesFileTypeDetector(userMimeTypes),
                 new MimeTypesFileTypeDetector(etcMimeTypes));
}
 

static void loadSystemColors(int[] systemColors) {
    if ("Linux".equals(AccessController.doPrivileged(new GetPropertyAction("os.name")))) { // Load motif default colors on Linux.
        loadMotifDefaultColors(systemColors);
    }
    else
    {
        try {
            loadSystemColorsForCDE(systemColors);
        }
        catch (Exception e) // Failure to load CDE colors.
        {
            loadMotifDefaultColors(systemColors);
        }
    }
}
 

/**
 * Returns the default SelectorProvider.
 */
public static SelectorProvider create() {
    String osname = AccessController
        .doPrivileged(new GetPropertyAction("os.name"));
    if (osname.equals("SunOS"))
        return createProvider("sun.nio.ch.DevPollSelectorProvider");
    if (osname.equals("Linux"))
        return createProvider("sun.nio.ch.EPollSelectorProvider");
    return new sun.nio.ch.PollSelectorProvider();
}
 

@Override
FileTypeDetector getFileTypeDetector() {
    Path userMimeTypes = Paths.get(AccessController.doPrivileged(
        new GetPropertyAction("user.home")), ".mime.types");
    Path etcMimeTypes = Paths.get("/etc/mime.types");

    return chain(new GnomeFileTypeDetector(),
                 new MimeTypesFileTypeDetector(userMimeTypes),
                 new MimeTypesFileTypeDetector(etcMimeTypes),
                 new MagicFileTypeDetector());
}
 

/**
 * Create a RMIMasterSocketFactory object.  Establish order of
 * connection mechanisms to attempt on createSocket, if a direct
 * socket connection fails.
 */
public RMIMasterSocketFactory() {
    altFactoryList = new Vector<>(2);
    boolean setFactories = false;

    try {
        String proxyHost;
        proxyHost = java.security.AccessController.doPrivileged(
            new GetPropertyAction("http.proxyHost"));

        if (proxyHost == null)
            proxyHost = java.security.AccessController.doPrivileged(
                new GetPropertyAction("proxyHost"));

        boolean disable = java.security.AccessController.doPrivileged(
            new GetPropertyAction("java.rmi.server.disableHttp", "true"))
            .equalsIgnoreCase("true");

        if (!disable && proxyHost != null && proxyHost.length() > 0) {
            setFactories = true;
        }
    } catch (Exception e) {
        // unable to obtain the properties, so use the default behavior.
    }

    if (setFactories) {
        altFactoryList.addElement(new RMIHttpToPortSocketFactory());
        altFactoryList.addElement(new RMIHttpToCGISocketFactory());
    }
}
 

/**
 * Returns the name of the <code>LookAndFeel</code> class that implements
 * the native system look and feel if there is one, otherwise
 * the name of the default cross platform <code>LookAndFeel</code>
 * class. This value can be overriden by setting the
 * <code>swing.systemlaf</code> system property.
 *
 * @return the <code>String</code> of the <code>LookAndFeel</code>
 *          class
 *
 * @see #setLookAndFeel
 * @see #getCrossPlatformLookAndFeelClassName
 */
public static String getSystemLookAndFeelClassName() {
    String systemLAF = AccessController.doPrivileged(
                         new GetPropertyAction("swing.systemlaf"));
    if (systemLAF != null) {
        return systemLAF;
    }
    OSInfo.OSType osType = AccessController.doPrivileged(OSInfo.getOSTypeAction());
    if (osType == OSInfo.OSType.WINDOWS) {
        return "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    } else {
        String desktop = AccessController.doPrivileged(new GetPropertyAction("sun.desktop"));
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        if ("gnome".equals(desktop) &&
                toolkit instanceof SunToolkit &&
                ((SunToolkit) toolkit).isNativeGTKAvailable()) {
            // May be set on Linux and Solaris boxs.
            return "com.sun.java.swing.plaf.gtk.GTKLookAndFeel";
        }
        if (osType == OSInfo.OSType.MACOSX) {
            if (toolkit.getClass() .getName()
                                   .equals("sun.lwawt.macosx.LWCToolkit")) {
                return "com.apple.laf.AquaLookAndFeel";
            }
        }
        if (osType == OSInfo.OSType.SOLARIS) {
            return "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
        }
    }
    return getCrossPlatformLookAndFeelClassName();
}
 

/**
 * Returns true if <code>setTransferHandler</code> should change the
 * <code>DropTarget</code>.
 */
private static boolean getSuppressDropTarget() {
    if (!checkedSuppressDropSupport) {
        suppressDropSupport = Boolean.valueOf(
            AccessController.doPrivileged(
                new GetPropertyAction("suppressSwingDropSupport")));
        checkedSuppressDropSupport = true;
    }
    return suppressDropSupport;
}
 

/**
 * Returns the default FileSystemProvider.
 */
public static FileSystemProvider create() {
    String osname = AccessController
        .doPrivileged(new GetPropertyAction("os.name"));
    if (osname.equals("SunOS"))
        return createProvider("sun.nio.fs.SolarisFileSystemProvider");
    if (osname.equals("Linux"))
        return createProvider("sun.nio.fs.LinuxFileSystemProvider");
    if (osname.contains("OS X"))
        return createProvider("sun.nio.fs.MacOSXFileSystemProvider");
    if (osname.equals("AIX"))
        return createProvider("sun.nio.fs.AixFileSystemProvider");
    throw new AssertionError("Platform not recognized");
}
 

static boolean atBugLevel(String bl) {              // package-private
    if (bugLevel == null) {
        if (!sun.misc.VM.isBooted())
            return false;
        String value = AccessController.doPrivileged(
            new GetPropertyAction("sun.nio.ch.bugLevel"));
        bugLevel = (value != null) ? value : "";
    }
    return bugLevel.equals(bl);
}