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/*
* 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.cap.primitives;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.Tag;
import org.mobicents.protocols.ss7.cap.api.CAPException;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentException;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentExceptionReason;
/**
*
* @author amit bhayani
* @author sergey vetyutnev
*
*/
public abstract class TbcdString implements CAPAsnPrimitive {
protected static int DIGIT_1_MASK = 0x0F;
protected static int DIGIT_2_MASK = 0xF0;
protected String data;
protected int minLength;
protected int maxLength;
protected String _PrimitiveName;
public TbcdString(int minLength, int maxLength, String _PrimitiveName) {
this.minLength = minLength;
this.maxLength = maxLength;
this._PrimitiveName = _PrimitiveName;
}
public TbcdString(int minLength, int maxLength, String _PrimitiveName, String data) {
this(minLength, maxLength, _PrimitiveName);
this.data = data;
}
public int getTag() throws CAPException {
return Tag.STRING_OCTET;
}
public int getTagClass() {
return Tag.CLASS_UNIVERSAL;
}
public boolean getIsPrimitive() {
return true;
}
@Override
public void decodeAll(AsnInputStream ansIS) throws CAPParsingComponentException {
try {
int length = ansIS.readLength();
this._decode(ansIS, length);
} catch (IOException e) {
throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
CAPParsingComponentExceptionReason.MistypedParameter);
}
}
public void decodeData(AsnInputStream ansIS, int length) throws CAPParsingComponentException {
try {
this._decode(ansIS, length);
} catch (IOException e) {
throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
CAPParsingComponentExceptionReason.MistypedParameter);
}
}
protected void _decode(AsnInputStream ansIS, int length) throws CAPParsingComponentException, IOException {
if (!ansIS.isTagPrimitive())
throw new CAPParsingComponentException("Error decoding " + _PrimitiveName + ": field must be primitive",
CAPParsingComponentExceptionReason.MistypedParameter);
if (length < this.minLength || length > this.maxLength)
throw new CAPParsingComponentException("Error decoding " + _PrimitiveName + ": the field must contain from "
+ this.minLength + " to " + this.maxLength + " octets. Contains: " + length,
CAPParsingComponentExceptionReason.MistypedParameter);
try {
this.data = decodeString(ansIS, length);
} catch (IOException e) {
throw new CAPParsingComponentException("IOException when decoding IMSI: " + e.getMessage(), e,
CAPParsingComponentExceptionReason.MistypedParameter);
}
}
public void encodeAll(AsnOutputStream asnOs) throws CAPException {
this.encodeAll(asnOs, this.getTagClass(), this.getTag());
}
public void encodeAll(AsnOutputStream asnOs, int tagClass, int tag) throws CAPException {
try {
asnOs.writeTag(tagClass, this.getIsPrimitive(), tag);
int pos = asnOs.StartContentDefiniteLength();
this.encodeData(asnOs);
asnOs.FinalizeContent(pos);
} catch (AsnException e) {
throw new CAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
}
}
public void encodeData(AsnOutputStream asnOs) throws CAPException {
if (this.data == null)
throw new CAPException("Error while encoding the " + _PrimitiveName + ": data is not defined");
encodeString(asnOs, this.data);
}
public static String decodeString(InputStream ansIS, int length) throws IOException, CAPParsingComponentException {
StringBuilder s = new StringBuilder();
for (int i1 = 0; i1 < length; i1++) {
int b = ansIS.read();
int digit1 = (b & DIGIT_1_MASK);
if (digit1 == 15) {
// this is mask
} else {
s.append(decodeNumber(digit1));
}
int digit2 = ((b & DIGIT_2_MASK) >> 4);
if (digit2 == 15) {
// this is mask
} else {
s.append(decodeNumber(digit2));
}
}
return s.toString();
}
public static void encodeString(OutputStream asnOs, String data) throws CAPException {
char[] chars = data.toCharArray();
for (int i = 0; i < chars.length; i = i + 2) {
char a = chars[i];
int digit1 = encodeNumber(a);
int digit2;
if ((i + 1) == chars.length) {
// add the filler instead
digit2 = 15;
} else {
char b = chars[i + 1];
digit2 = encodeNumber(b);
}
int digit = (digit2 << 4) | digit1;
try {
asnOs.write(digit);
} catch (IOException e) {
throw new CAPException("Error when encoding TbcdString: " + e.getMessage(), e);
}
}
}
protected static int encodeNumber(char c) throws CAPException {
switch (c) {
case '0':
return 0;
case '1':
return 1;
case '2':
return 2;
case '3':
return 3;
case '4':
return 4;
case '5':
return 5;
case '6':
return 6;
case '7':
return 7;
case '8':
return 8;
case '9':
return 9;
case '*':
return 10;
case '#':
return 11;
case 'a':
return 12;
case 'b':
return 13;
case 'c':
return 14;
default:
throw new CAPException(
"char should be between 0 - 9, *, #, a, b, c for Telephony Binary Coded Decimal String. Received " + c);
}
}
protected static char decodeNumber(int i) throws CAPParsingComponentException {
switch (i) {
case 0:
return '0';
case 1:
return '1';
case 2:
return '2';
case 3:
return '3';
case 4:
return '4';
case 5:
return '5';
case 6:
return '6';
case 7:
return '7';
case 8:
return '8';
case 9:
return '9';
case 10:
return '*';
case 11:
return '#';
case 12:
return 'a';
case 13:
return 'b';
case 14:
return 'c';
// case 15:
// return 'd';
default:
throw new CAPParsingComponentException(
"Integer should be between 0 - 15 for Telephony Binary Coded Decimal String. Received " + i,
CAPParsingComponentExceptionReason.MistypedParameter);
}
}
@Override
public String toString() {
return _PrimitiveName + " [" + this.data + "]";
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((data == null) ? 0 : data.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
TbcdString other = (TbcdString) obj;
if (data == null) {
if (other.data != null)
return false;
} else if (!data.equals(other.data))
return false;
return true;
}
}
