/*
* 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 org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.BitSetStrictLength;
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;
/**
*
* Super class for implementing primitives that are BIT STRING (SIZE (x..y))
*
* @author sergey vetyutnev
*
*/
public abstract class BitStringBase implements CAPAsnPrimitive {
protected BitSetStrictLength bitString;
protected int minLength;
protected int maxLength;
protected int curLength;
protected String _PrimitiveName;
public BitStringBase(int minLength, int maxLength, int curLength, String _PrimitiveName) {
this.minLength = minLength;
this.maxLength = maxLength;
this.curLength = curLength;
this._PrimitiveName = _PrimitiveName;
this.bitString = new BitSetStrictLength(curLength);
}
public BitStringBase(int minLength, int maxLength, int curLength, String _PrimitiveName, BitSetStrictLength data) {
this(minLength, maxLength, curLength, _PrimitiveName);
this.bitString = data;
}
public int getTag() throws CAPException {
return Tag.STRING_BIT;
}
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);
} catch (AsnException e) {
throw new CAPParsingComponentException("AsnException 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);
} catch (AsnException e) {
throw new CAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
CAPParsingComponentExceptionReason.MistypedParameter);
}
}
protected void _decode(AsnInputStream ansIS, int length) throws CAPParsingComponentException, IOException, AsnException {
if (!ansIS.isTagPrimitive())
throw new CAPParsingComponentException("Error decoding " + _PrimitiveName + ": field must be primitive",
CAPParsingComponentExceptionReason.MistypedParameter);
int minLen = (this.minLength - 1) / 8 + 2;
int maxLen = (this.maxLength - 1) / 8 + 2;
if (length < minLen || length > maxLen)
throw new CAPParsingComponentException("Error decoding " + _PrimitiveName + ": the field must contain from "
+ minLen + " to " + maxLen + " octets. Contains: " + length,
CAPParsingComponentExceptionReason.MistypedParameter);
this.bitString = ansIS.readBitStringData(length);
}
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.bitString == null)
throw new CAPException("Error while encoding the " + _PrimitiveName + ": data is not defined");
try {
asnOs.writeBitStringData(this.bitString);
} catch (AsnException e) {
throw new CAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
} catch (IOException e) {
throw new CAPException("IOException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
}
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((bitString == null) ? 0 : bitString.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;
BitStringBase other = (BitStringBase) obj;
if (bitString == null) {
if (other.bitString != null)
return false;
} else if (!bitString.equals(other.bitString))
return false;
return true;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(_PrimitiveName);
sb.append(" [Data=");
if (this.bitString != null) {
for (int i = 0; i < this.bitString.getStrictLength(); i++) {
if (i % 8 == 0) {
sb.append(" ");
}
if (this.bitString.get(i))
sb.append("1");
else
sb.append("0");
}
}
sb.append("]");
return sb.toString();
}
}