/**
    * Copyright (C) 2010-14 pvmanager developers. See COPYRIGHT.TXT
    * All rights reserved. Use is subject to license terms. See LICENSE.TXT
    */
   package org.epics.pvmanager.sim;
   
   import java.util.List;
   import java.util.logging.Logger;
   import org.epics.pvmanager.ChannelWriteCallback;
  import org.epics.pvmanager.MultiplexedChannelHandler;
  import org.epics.pvmanager.util.FunctionParser;
  import org.epics.vtype.ValueFactory;
  
  /**
   *
   * @author carcassi
   */
  class ConstantChannelHandler extends MultiplexedChannelHandler<Object, Object> {
      
      private static final Logger log = Logger.getLogger(ConstantChannelHandler.class.getName());
  
      public ConstantChannelHandler(String channelName) {
          super(channelName);
          List<Object> tokens = FunctionParser.parseFunctionWithScalarOrArrayArguments(channelName,
                  "Wrong syntax. Correct examples: const(3.14), const(\"Bob\"), const(1,2,3), const(\"ON\", \"OFF\"");
          processMessage((Object) ValueFactory.toVTypeChecked(tokens.get(1)));
      }
  
      @Override
      public void connect() {
          processConnection(new Object());
      }
  
      @Override
      public void disconnect() {
          processConnection(null);
      }
  
      @Override
      protected boolean saveMessageAfterDisconnect() {
          return true;
      }
  
      @Override
      public void write(Object newValue, ChannelWriteCallback callback) {
          throw new UnsupportedOperationException("Can't write to simulation channel.");
      }
  }