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/* Copyright (c) 2005-2007 Jan S. Rellermeyer
* Information and Communication Systems Research Group (IKS),
* Department of Computer Science, ETH Zurich.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of ETH Zurich nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package ch.ethz.iks.slp.impl;
import java.io.DataInput;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.List;
import ch.ethz.iks.slp.ServiceLocationException;
/**
* a ServiceAcknowledgement is sent by a DA as reaction to a ServiceRegistration
* or ServiceDeregistration.
*
* @author Jan S. Rellermeyer, IKS, ETH Zürich
* @since 0.1
*/
class ServiceAcknowledgement extends ReplyMessage {
/**
* create a new ServiceAcknowledgement from a DataInput streaming the bytes
* of an ServiceAcknowledgement message body.
*
* @param input
* stream of bytes forming the message body.
* @throws ServiceLocationException
* in case that the IO caused an exception.
* @throws IOException
*/
ServiceAcknowledgement(final DataInput input) throws IOException {
errorCode = input.readShort();
}
/**
* create a new ServiceAcknowledgement.
*
* @param msg
* the SLPMessage to acknowledge.
* @param error
* the error code.
*/
ServiceAcknowledgement(final SLPMessage msg, final int error) {
funcID = SRVACK;
xid = msg.xid;
locale = msg.locale;
address = msg.address;
port = msg.port;
errorCode = error;
}
/**
* get the bytes of the message body in the following RFC 2608 compliant
* format:
* <p>
*
* <pre>
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Service Location header (function = SrvAck = 5) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Error Code |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* </pre>.
* </p>
*
* @return array of bytes.
* @throws ServiceLocationException
* if an IO Exception occurs.
*/
protected void writeTo(final DataOutputStream out) throws IOException {
super.writeHeader(out, getSize());
out.writeShort(errorCode);
}
/**
* get the length of the message.
*
* @return the length of the message.
* @see ch.ethz.iks.slp.impl.SLPMessage#getSize()
*/
int getSize() {
return getHeaderSize() + 2;
}
/**
* get the result.
*
* @see ch.ethz.iks.slp.impl.ReplyMessage#getResult()
* @return the <code>List</code> of results.
*/
List getResult() {
return null;
}
/**
* get a string representation of the ServiceAcknowledgement message.
*
* @return a String displaying the properties of this message instance.
*/
public String toString() {
return super.toString() + ", errorCode " + errorCode;
}
}
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