/*
* TeleStax, Open Source Cloud Communications Copyright 2012.
* and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.mobicents.protocols.ss7.tcap.asn;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
/**
* Class with some utility methods.
*
* @author baranowb
*
*/
public final class Utils {
public static long readTransactionId(AsnInputStream ais) throws AsnException, IOException {
// here we have AIS, with txid - this is integer, but its coded as
// octet string so no extra byte is added....
byte[] data = ais.readOctetString();
byte[] longRep = new byte[8];
// copy data so longRep = {0,0,0,...,data};
System.arraycopy(data, 0, longRep, longRep.length - data.length, data.length);
ByteBuffer bb = ByteBuffer.wrap(longRep);
return bb.getLong();
}
public static void writeTransactionId(AsnOutputStream aos, long txId, int tagClass, int tag) throws AsnException,
IOException {
// txId may only be up to 4 bytes, that is 0xFF FF FF FF
byte[] data = new byte[4];
// long ll = txId.longValue();
// data[3] = (byte) ll;
// data[2] = (byte) (ll>> 8);
// data[1] = (byte) (ll>>16);
// data[0] = (byte) (ll >> 24);
data[3] = (byte) txId;
data[2] = (byte) (txId >> 8);
data[1] = (byte) (txId >> 16);
data[0] = (byte) (txId >> 24);
aos.writeOctetString(tagClass, tag, data);
}
public static long decodeTransactionId(byte[] data) {
byte[] longRep = new byte[8];
// copy data so longRep = {0,0,0,...,data};
System.arraycopy(data, 0, longRep, longRep.length - data.length, data.length);
ByteBuffer bb = ByteBuffer.wrap(longRep);
return bb.getLong();
}
public static byte[] encodeTransactionId(long txId) {
// txId may only be up to 4 bytes, that is 0xFF FF FF FF
byte[] data = new byte[4];
// long ll = txId.longValue();
// data[3] = (byte) ll;
// data[2] = (byte) (ll>> 8);
// data[1] = (byte) (ll>>16);
// data[0] = (byte) (ll >> 24);
data[3] = (byte) txId;
data[2] = (byte) (txId >> 8);
data[1] = (byte) (txId >> 16);
data[0] = (byte) (txId >> 24);
return data;
}
}