1 /* 2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle 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 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 package sun.nio.ch.sctp; 26 27 import javax.tools.annotation.GenerateNativeHeader; 28 29 /** 30 * Wraps the actual message or notification so that it can be 31 * set and returned from the native receive implementation. 32 */ 33 /* No native methods here, but the constants are needed in the supporting JNI code */ 34 @GenerateNativeHeader 35 public class ResultContainer { 36 /* static final ints so that they can be referenced from native */ 37 static final int NOTHING = 0; 38 static final int MESSAGE = 1; 39 static final int SEND_FAILED = 2; 40 static final int ASSOCIATION_CHANGED = 3; 41 static final int PEER_ADDRESS_CHANGED = 4; 42 static final int SHUTDOWN = 5; 43 44 private Object value; 45 private int type; 46 47 int type() { 48 return type; 49 } 50 51 boolean hasSomething() { 52 return type() != NOTHING; 53 } 54 55 boolean isNotification() { 56 return type() != MESSAGE && type() != NOTHING ? true : false; 57 } 58 59 void clear() { 60 type = NOTHING; 61 value = null; 62 } 63 64 SctpNotification notification() { 65 assert type() != MESSAGE && type() != NOTHING; 66 67 return (SctpNotification) value; 68 } 69 70 MessageInfoImpl getMessageInfo() { 71 assert type() == MESSAGE; 72 73 if (value instanceof MessageInfoImpl) 74 return (MessageInfoImpl) value; 75 76 return null; 77 } 78 79 SendFailed getSendFailed() { 80 assert type() == SEND_FAILED; 81 82 if (value instanceof SendFailed) 83 return (SendFailed) value; 84 85 return null; 86 } 87 88 AssociationChange getAssociationChanged() { 89 assert type() == ASSOCIATION_CHANGED; 90 91 if (value instanceof AssociationChange) 92 return (AssociationChange) value; 93 94 return null; 95 } 96 97 PeerAddrChange getPeerAddressChanged() { 98 assert type() == PEER_ADDRESS_CHANGED; 99 100 if (value instanceof PeerAddrChange) 101 return (PeerAddrChange) value; 102 103 return null; 104 } 105 106 Shutdown getShutdown() { 107 assert type() == SHUTDOWN; 108 109 if (value instanceof Shutdown) 110 return (Shutdown) value; 111 112 return null; 113 } 114 115 @Override 116 public String toString() { 117 StringBuilder sb = new StringBuilder(); 118 sb.append("Type: "); 119 switch (type) { 120 case NOTHING: sb.append("NOTHING"); break; 121 case MESSAGE: sb.append("MESSAGE"); break; 122 case SEND_FAILED: sb.append("SEND FAILED"); break; 123 case ASSOCIATION_CHANGED: sb.append("ASSOCIATION CHANGE"); break; 124 case PEER_ADDRESS_CHANGED: sb.append("PEER ADDRESS CHANGE"); break; 125 case SHUTDOWN: sb.append("SHUTDOWN"); break; 126 default : sb.append("Unknown result type"); 127 } 128 sb.append(", Value: "); 129 sb.append((value == null) ? "null" : value.toString()); 130 return sb.toString(); 131 } 132 }