/*
 * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package sun.nio.ch.sctp;

import java.lang.annotation.Native;

Wraps the actual message or notification so that it can be set and returned from the native receive implementation.
/** * Wraps the actual message or notification so that it can be * set and returned from the native receive implementation. */
public class ResultContainer { /* static final ints so that they can be referenced from native */ @Native static final int NOTHING = 0; @Native static final int MESSAGE = 1; @Native static final int SEND_FAILED = 2; @Native static final int ASSOCIATION_CHANGED = 3; @Native static final int PEER_ADDRESS_CHANGED = 4; @Native static final int SHUTDOWN = 5; private Object value; private int type; int type() { return type; } boolean hasSomething() { return type() != NOTHING; } boolean isNotification() { return type() != MESSAGE && type() != NOTHING ? true : false; } void clear() { type = NOTHING; value = null; } SctpNotification notification() { assert type() != MESSAGE && type() != NOTHING; return (SctpNotification) value; } MessageInfoImpl getMessageInfo() { assert type() == MESSAGE; if (value instanceof MessageInfoImpl) return (MessageInfoImpl) value; return null; } SendFailed getSendFailed() { assert type() == SEND_FAILED; if (value instanceof SendFailed) return (SendFailed) value; return null; } AssociationChange getAssociationChanged() { assert type() == ASSOCIATION_CHANGED; if (value instanceof AssociationChange) return (AssociationChange) value; return null; } PeerAddrChange getPeerAddressChanged() { assert type() == PEER_ADDRESS_CHANGED; if (value instanceof PeerAddrChange) return (PeerAddrChange) value; return null; } Shutdown getShutdown() { assert type() == SHUTDOWN; if (value instanceof Shutdown) return (Shutdown) value; return null; } @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("Type: "); switch (type) { case NOTHING: sb.append("NOTHING"); break; case MESSAGE: sb.append("MESSAGE"); break; case SEND_FAILED: sb.append("SEND FAILED"); break; case ASSOCIATION_CHANGED: sb.append("ASSOCIATION CHANGE"); break; case PEER_ADDRESS_CHANGED: sb.append("PEER ADDRESS CHANGE"); break; case SHUTDOWN: sb.append("SHUTDOWN"); break; default : sb.append("Unknown result type"); } sb.append(", Value: "); sb.append((value == null) ? "null" : value.toString()); return sb.toString(); } }