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/*
* This file is part of rasdaman community.
*
* Rasdaman community is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
/*************************************************************
* <pre>
*
* PURPOSE:
*
*
*
* COMMENTS:
*
* </pre>
*********************************************************** */
package rasj.rnp;
import java.io.*;
public class RnpDecoder
{
public RnpMessage message;
private RnpFragment currentFragment;
private RnpParameter currentParameter;
private int fragmentIndex;
RnpDecoder(RnpMessage rnpmessage)
{
message=rnpmessage;
currentFragment = null;
currentParameter = null;
fragmentIndex = 0;
}
void verify() throws RnpException
{
if(message.header.protocolId != Rnp.rnpProtocolId)
throw new RnpException("Not a RNP message");
if(message.header.messageEndianness != 0)
throw new RnpException("Incorrect endianness");
if(message.header.majorVersion != 1 || message.header.minorVersion != 0 || message.header.dataStart != RnpMessageHeader.length)
throw new RnpException("Incorrect message version");
}
int getServerType()
{
return message.header.serverType;
}
byte getDesiredEndianness()
{
return message.header.desiredEndianness;
}
byte getMessageEndianness()
{
return message.header.messageEndianness;
}
int getMessageLength()
{
return message.header.totalMessageLength;
}
int countFragments()
{
return message.header.nrFragments;
}
byte getMajorVersion()
{
return message.header.majorVersion;
}
byte getMinorVersion()
{
return message.header.minorVersion;
}
RnpFragment getFirstFragment()
{
fragmentIndex = 0;
currentFragment = (RnpFragment)message.fragments.get(0);
return currentFragment;
}
RnpFragment getNextFragment(RnpFragment fragment)
{
fragmentIndex++;
currentFragment = (RnpFragment)message.fragments.get(fragmentIndex);
return currentFragment;
}
int getFragmentType()
{
//fgt_None, fgt_Command, fgt_OkAnswer, fgt_Error, fgt_DiscardedRequest
return currentFragment.getFragmentType();
}
int countParameters()
{
return currentFragment.countParameters();
}
RnpParameter getFirstParameter()
{
currentParameter = currentFragment.getFirstParameter();
return currentParameter;
}
RnpParameter getNextParameter()
{
currentParameter = currentFragment.getNextParameter();
return currentParameter;
}
int getParameterType()
{
return currentParameter.paramType;
}
int getDataLength()
{
return currentParameter.getDataLength();
}
int getDataType()
{
// dtt_None,dtt_Asciiz, dtt_Int32,dtt_Double64, dtt_Opaque
return currentParameter.dataType;
}
int getDataAsInteger()
{
return ((ParameterInt32)currentParameter).data;
}
float getDataAsFloat()
{
return((ParameterFloat32)currentParameter).data;
}
double getDataAsDouble()
{
return((ParameterDouble64)currentParameter).data;
}
String getDataAsString()
{
return new String(((ParameterString)currentParameter).data);
}
byte[] getDataOpaque()
{
return((ParameterOpaque)currentParameter).data;
}
}
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