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package f00f.net.irc.martyr;
import java.util.Observable;
import java.util.Observer;
/**
* Provides a framework for an auto service that operates with
* InCommands. Does enable by default. Splits the 'update' method
* into two, 'updateState' and 'updateCommand'. Also provides thread
* safety on all methods.
*/
public abstract class GenericCommandAutoService implements Observer
{
protected boolean enabled = false;
protected IRCConnection connection;
protected GenericCommandAutoService( IRCConnection connection )
{
this.connection = connection;
enable();
}
public synchronized void enable()
{
if( enabled )
return;
connection.addCommandObserver( this );
enabled = true;
}
public synchronized void disable()
{
if( !enabled )
return;
connection.removeCommandObserver( this );
enabled = false;
}
public synchronized void update( Observable observer, Object updated )
{
if( !enabled )
throw new IllegalStateException("This observer is not enabled." );
if( updated instanceof State )
{
throw new IllegalArgumentException("This is not a state observer." );
}
else if( updated instanceof InCommand )
{
updateCommand( (InCommand)updated );
}
else
{
throw new IllegalArgumentException("Unknown object given to update.");
}
}
protected IRCConnection getConnection()
{
return connection;
}
protected synchronized boolean isEnabled()
{
return enabled;
}
protected abstract void updateCommand( InCommand command );
// END AutoRegister
}
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