/**
* Start time:17:10:53 2009-03-30<br>
* Project: mobicents-isup-stack<br>
*
* @author <a href="mailto:baranowb@gmail.com"> Bartosz Baranowski
* </a>
*
*/
package org.mobicents.ss7.isup.impl.message.parameter;
import java.io.IOException;
import org.mobicents.ss7.isup.ParameterRangeInvalidException;
import org.mobicents.ss7.isup.message.parameter.CircuitStateIndicator;
/**
* Start time:17:10:53 2009-03-30<br>
* Project: mobicents-isup-stack<br>
*
* @author <a href="mailto:baranowb@gmail.com"> Bartosz Baranowski </a>
*/
public class CircuitStateIndicatorImpl extends AbstractParameter implements CircuitStateIndicator {
private byte[] circuitState = null;
public CircuitStateIndicatorImpl(byte[] circuitState) throws ParameterRangeInvalidException {
super();
this.decodeElement(circuitState);
}
public CircuitStateIndicatorImpl() {
super();
// TODO Auto-generated constructor stub
}
/*
* (non-Javadoc)
*
* @see org.mobicents.isup.ISUPComponent#decodeElement(byte[])
*/
public int decodeElement(byte[] b) throws ParameterRangeInvalidException {
try {
setCircuitState(b);
} catch (Exception e) {
throw new ParameterRangeInvalidException(e);
}
return b.length;
}
/*
* (non-Javadoc)
*
* @see org.mobicents.isup.ISUPComponent#encodeElement()
*/
public byte[] encodeElement() throws IOException {
return this.circuitState;
}
public byte[] getCircuitState() {
return circuitState;
}
public void setCircuitState(byte[] circuitState) throws IllegalArgumentException {
if (circuitState == null || circuitState.length == 0) {
throw new IllegalArgumentException("byte[] must nto be null and length must be greater than 0");
}
this.circuitState = circuitState;
}
public byte createCircuitState(int MBS, int CPS, int HBS) {
int v = 0;
// FIXME: Shoudl we here enforce proper coding? according to note or
// move it to encodeElement??
if (HBS != _HBS_NO_BLOCKING) {
// NOTE � If bits F E are not coded 0 0, bits D C must be coded 1 1.
// - this means CPS == 3
CPS = _CPS_IDLE;
}
v = MBS & 0x03;
v |= (CPS & 0x03) << 2;
v |= (HBS & 0x03) << 4;
return (byte) v;
}
public int getCallProcessingState(byte b) {
return (b >> 2) & 0x03;
}
public int getHardwareBlockingState(byte b) {
return (b >> 4) & 0x03;
}
public int getMaintenanceBlockingState(byte b) {
return b & 0x03;
}
public int getCode() {
return _PARAMETER_CODE;
}
}