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//Copyright 2003-2005 Arthur van Hoff, Rick Blair
//Licensed under Apache License version 2.0
//Original license LGPL
package javax.jmdns.impl.constants;
/**
* DNSState defines the possible states for services registered with JmDNS.
*
* @version %I%, %G%
* @author Werner Randelshofer, Rick Blair, Pierre Frisch
*/
public enum DNSState
{
/**
*
*/
PROBING_1("probing 1", StateClass.probing),
/**
*
*/
PROBING_2("probing 2", StateClass.probing),
/**
*
*/
PROBING_3("probing 3", StateClass.probing),
/**
*
*/
ANNOUNCING_1("announcing 1", StateClass.announcing),
/**
*
*/
ANNOUNCING_2("announcing 2", StateClass.announcing),
/**
*
*/
ANNOUNCED("announced", StateClass.announced),
/**
*
*/
CANCELING_1("canceling 1", StateClass.canceling),
/**
*
*/
CANCELING_2("canceling 2", StateClass.canceling),
/**
*
*/
CANCELING_3("canceling 3", StateClass.canceling),
/**
*
*/
CANCELED("canceled", StateClass.canceled);
private enum StateClass
{
probing, announcing, announced, canceling, canceled
}
// private static Logger logger = Logger.getLogger(DNSState.class.getName());
private final String _name;
private final StateClass _state;
private DNSState(String name, StateClass state)
{
_name = name;
_state = state;
}
@Override
public final String toString()
{
return _name;
}
/**
* Returns the next advanced state.<br/>
* In general, this advances one step in the following sequence: PROBING_1, PROBING_2, PROBING_3, ANNOUNCING_1, ANNOUNCING_2, ANNOUNCED.<br/>
* or CANCELING_1, CANCELING_2, CANCELING_3, CANCELED Does not advance for ANNOUNCED and CANCELED state.
*
* @return next state
*/
public final DNSState advance()
{
switch (this)
{
case PROBING_1:
return PROBING_2;
case PROBING_2:
return PROBING_3;
case PROBING_3:
return ANNOUNCING_1;
case ANNOUNCING_1:
return ANNOUNCING_2;
case ANNOUNCING_2:
return ANNOUNCED;
case ANNOUNCED:
return ANNOUNCED;
case CANCELING_1:
return CANCELING_2;
case CANCELING_2:
return CANCELING_3;
case CANCELING_3:
return CANCELED;
case CANCELED:
return CANCELED;
}
// This is just to keep the compiler happy as we have covered all cases before.
return this;
}
/**
* Returns to the next reverted state. All states except CANCELED revert to PROBING_1. Status CANCELED does not revert.
*
* @return reverted state
*/
public final DNSState revert()
{
switch (this)
{
case PROBING_1:
case PROBING_2:
case PROBING_3:
case ANNOUNCING_1:
case ANNOUNCING_2:
case ANNOUNCED:
return PROBING_1;
case CANCELING_1:
case CANCELING_2:
case CANCELING_3:
return CANCELING_1;
case CANCELED:
return CANCELED;
}
// This is just to keep the compiler happy as we have covered all cases before.
return this;
}
/**
* Returns true, if this is a probing state.
*
* @return <code>true</code> if probing state, <code>false</code> otherwise
*/
public final boolean isProbing()
{
return _state == StateClass.probing;
}
/**
* Returns true, if this is an announcing state.
*
* @return <code>true</code> if announcing state, <code>false</code> otherwise
*/
public final boolean isAnnouncing()
{
return _state == StateClass.announcing;
}
/**
* Returns true, if this is an announced state.
*
* @return <code>true</code> if announced state, <code>false</code> otherwise
*/
public final boolean isAnnounced()
{
return _state == StateClass.announced;
}
/**
* Returns true, if this is a canceling state.
*
* @return <code>true</code> if canceling state, <code>false</code> otherwise
*/
public final boolean isCanceling()
{
return _state == StateClass.canceling;
}
/**
* Returns true, if this is a canceled state.
*
* @return <code>true</code> if canceled state, <code>false</code> otherwise
*/
public final boolean isCanceled()
{
return _state == StateClass.canceled;
}
}
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