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src/java.base/share/classes/sun/net/sdp/SdpSupport.java

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rev 14210 : 8154231: Simplify access to System properties from JDK code
Reviewed-by: rriggs


  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.net.sdp;
  27 
  28 import java.io.IOException;
  29 import java.io.FileDescriptor;
  30 import java.security.AccessController;
  31 
  32 import jdk.internal.misc.SharedSecrets;
  33 import jdk.internal.misc.JavaIOFileDescriptorAccess;

  34 
  35 
  36 /**
  37  * This class defines methods for creating SDP sockets or "converting" existing
  38  * file descriptors, referencing (unbound) TCP sockets, to SDP.
  39  */
  40 
  41 public final class SdpSupport {
  42     private static final String os = AccessController
  43         .doPrivileged(new sun.security.action.GetPropertyAction("os.name"));
  44     private static final boolean isSupported = (os.equals("SunOS") || (os.equals("Linux")));
  45     private static final JavaIOFileDescriptorAccess fdAccess =
  46         SharedSecrets.getJavaIOFileDescriptorAccess();
  47 
  48     private SdpSupport() { }
  49 
  50     /**
  51      * Creates a SDP socket, returning file descriptor referencing the socket.
  52      */
  53     public static FileDescriptor createSocket() throws IOException {
  54         if (!isSupported)
  55             throw new UnsupportedOperationException("SDP not supported on this platform");
  56         int fdVal = create0();
  57         FileDescriptor fd = new FileDescriptor();
  58         fdAccess.set(fd, fdVal);
  59         return fd;
  60     }
  61 
  62     /**
  63      * Converts an existing file descriptor, that references an unbound TCP socket,




  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.net.sdp;
  27 
  28 import java.io.IOException;
  29 import java.io.FileDescriptor;
  30 import java.security.AccessController;
  31 
  32 import jdk.internal.misc.SharedSecrets;
  33 import jdk.internal.misc.JavaIOFileDescriptorAccess;
  34 import sun.security.action.GetPropertyAction;
  35 
  36 
  37 /**
  38  * This class defines methods for creating SDP sockets or "converting" existing
  39  * file descriptors, referencing (unbound) TCP sockets, to SDP.
  40  */
  41 
  42 public final class SdpSupport {
  43     private static final String os = GetPropertyAction.getProperty("os.name");

  44     private static final boolean isSupported = (os.equals("SunOS") || (os.equals("Linux")));
  45     private static final JavaIOFileDescriptorAccess fdAccess =
  46         SharedSecrets.getJavaIOFileDescriptorAccess();
  47 
  48     private SdpSupport() { }
  49 
  50     /**
  51      * Creates a SDP socket, returning file descriptor referencing the socket.
  52      */
  53     public static FileDescriptor createSocket() throws IOException {
  54         if (!isSupported)
  55             throw new UnsupportedOperationException("SDP not supported on this platform");
  56         int fdVal = create0();
  57         FileDescriptor fd = new FileDescriptor();
  58         fdAccess.set(fd, fdVal);
  59         return fd;
  60     }
  61 
  62     /**
  63      * Converts an existing file descriptor, that references an unbound TCP socket,


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