1 /*

     2  * Copyright 2009 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 package sun.nio.ch;

    26 

    27 /**

    28  * Wraps the actual message or notification so that it can be

    29  * set and returned from the native receive implementation.

    30  */

    31 public class SctpResultContainer {

    32     /* static final ints so that they can be referenced from native */

    33     static final int NOTHING = 0;

    34     static final int MESSAGE = 1;

    35     static final int SEND_FAILED = 2;

    36     static final int ASSOCIATION_CHANGED = 3;

    37     static final int PEER_ADDRESS_CHANGED = 4;

    38     static final int SHUTDOWN = 5;

    39 

    40     private Object value;

    41     private int type;

    42 

    43     int type() {

    44         return type;

    45     }

    46 

    47     boolean hasSomething() {

    48         return type() != NOTHING;

    49     }

    50 

    51     boolean isNotification() {

    52         return type() != MESSAGE && type() != NOTHING ? true : false;

    53     }

    54 

    55     void clear() {

    56         type = NOTHING;

    57         value = null;

    58     }

    59 

    60     SctpNotification notification() {

    61         assert type() != MESSAGE && type() != NOTHING;

    62 

    63         return (SctpNotification) value;

    64     }

    65 

    66     SctpMessageInfoImpl getMessageInfo() {

    67         assert type() == MESSAGE;

    68 

    69         if (value instanceof SctpMessageInfoImpl)

    70             return (SctpMessageInfoImpl) value;

    71 

    72         return null;

    73     }

    74 

    75     SctpSendFailed getSendFailed() {

    76         assert type() == SEND_FAILED;

    77 

    78         if (value instanceof SctpSendFailed)

    79             return (SctpSendFailed) value;

    80 

    81         return null;

    82     }

    83 

    84     SctpAssocChange getAssociationChanged() {

    85         assert type() == ASSOCIATION_CHANGED;

    86 

    87         if (value instanceof SctpAssocChange)

    88             return (SctpAssocChange) value;

    89 

    90         return null;

    91     }

    92 

    93     SctpPeerAddrChange getPeerAddressChanged() {

    94         assert type() == PEER_ADDRESS_CHANGED;

    95 

    96         if (value instanceof SctpPeerAddrChange)

    97             return (SctpPeerAddrChange) value;

    98 

    99         return null;

   100     }

   101 

   102     SctpShutdown getShutdown() {

   103         assert type() == SHUTDOWN;

   104 

   105         if (value instanceof SctpShutdown)

   106             return (SctpShutdown) value;

   107 

   108         return null;

   109     }

   110 

   111     @Override

   112     public String toString() {

   113         StringBuilder sb = new StringBuilder();

   114         sb.append("Type: ");

   115         switch (type) {

   116             case NOTHING:              sb.append("NOTHING");             break;

   117             case MESSAGE:              sb.append("MESSAGE");             break;

   118             case SEND_FAILED:          sb.append("SEND FAILED");         break;

   119             case ASSOCIATION_CHANGED:  sb.append("ASSOCIATION CHANGE");  break;

   120             case PEER_ADDRESS_CHANGED: sb.append("PEER ADDRESS CHANGE"); break;

   121             case SHUTDOWN:             sb.append("SHUTDOWN");            break;

   122             default :                  sb.append("Unknown result type");

   123         }

   124        return sb.append(", Value: ").append(value.toString()).toString();

   125     }

   126 }