/*
    *  Licensed to the Apache Software Foundation (ASF) under one
    *  or more contributor license agreements.  See the NOTICE file
    *  distributed with this work for additional information
    *  regarding copyright ownership.  The ASF licenses this file
    *  to you under the Apache License, Version 2.0 (the
    *  "License"); you may not use this file except in compliance
    *  with the License.  You may obtain a copy of the License at
    *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   *
   */
  
  package org.apache.mina.transport.serial;
  
  import gnu.io.SerialPort;
  
  import java.net.SocketAddress;
  import java.security.InvalidParameterException;
  
  /**
   * An address for a serial port communication.
   *
   * @author The Apache MINA Project (dev@mina.apache.org)
   */
  public class SerialAddress extends SocketAddress {
  
      private static final long serialVersionUID = 1735370510442384505L;
  
      public enum DataBits {
          DATABITS_5, DATABITS_6, DATABITS_7, DATABITS_8
      }
  
      public enum Parity {
          NONE, ODD, EVEN, MARK, SPACE
      }
  
      public enum StopBits {
          BITS_1, BITS_2, BITS_1_5
      }
  
      public enum FlowControl {
          NONE, RTSCTS_IN, RTSCTS_OUT, XONXOFF_IN, XONXOFF_OUT
      }
  
      private final String name;
      private final int bauds;
      private final DataBits dataBits;
      private final StopBits stopBits;
      private final Parity parity;
      private final FlowControl flowControl;
  
      /**
       * Create an address for a serial communication, associating a serial interface and
       * various serial signal carcteristics.
       * @param name name of the device, COM1 COM2 for Windows, /dev/ttyS0 for Unix
       * @param bauds baud rate for the communication
       * @param dataBits number of data bits per bytes
       * @param stopBits number of stop bits
       * @param parity parity used
       * @param flowControl flow control used
       */
      public SerialAddress(String name, int bauds, DataBits dataBits,
              StopBits stopBits, Parity parity, FlowControl flowControl) {
          if (name == null) {
              throw new NullPointerException("name");
          }
          name = name.trim();
          if (name.length() == 0) {
              throw new IllegalArgumentException("Empty name.");
          }
          if (bauds <= 0) {
              throw new IllegalArgumentException("bauds: " + bauds);
          }
          if (dataBits == null) {
              throw new NullPointerException("dataBits");
          }
          if (stopBits == null) {
              throw new NullPointerException("stopBits");
          }
          if (parity == null) {
              throw new NullPointerException("parity");
          }
          if (flowControl == null) {
              throw new NullPointerException("flowControl");
          }
          
          this.name = name;
          this.bauds = bauds;
          this.dataBits = dataBits;
          this.stopBits = stopBits;
          this.parity = parity;
         this.flowControl = flowControl;
     }
 
     /**
      * Bauds rate for the communication.
      * @return the bauds (bits per seconds) for this serial link
      */
     public int getBauds() {
         return bauds;
     }
 
     /**
      * Number of data bits for each communicated bytes.
      * @return the data bits
      */
     public DataBits getDataBits() {
         return dataBits;
     }
 
     /**
      * The flow control policie used for this communication.
      * @return the flow control
      */
     public FlowControl getFlowControl() {
         return flowControl;
     }
 
     /**
      * The name of the device. Can be COM1, COM2, /dev/ttyS0, /dev/ttyUSB1, etc..
      * @return name
      */
     public String getName() {
         return name;
     }
 
     /**
      * The parity check for this communication.
      * @return parity type
      */
     public Parity getParity() {
         return parity;
     }
 
     /**
      * Number of stop bits used.
      * @return stop bits number
      */
     public StopBits getStopBits() {
         return stopBits;
     }
 
     /**
      * Convert this serial address to a human readable string.
      */
     @Override
     public String toString() {
         return name + " (bauds: " + bauds + ", dataBits: " + dataBits
                 + ", stopBits: " + stopBits + ", parity: " + parity
                 + ", flowControl: " + flowControl + ")";
     }
 
     int getDataBitsForRXTX() {
         switch (dataBits) {
         case DATABITS_5:
             return SerialPort.DATABITS_5;
         case DATABITS_6:
             return SerialPort.DATABITS_6;
         case DATABITS_7:
             return SerialPort.DATABITS_7;
         case DATABITS_8:
             return SerialPort.DATABITS_8;
         }
         throw new InvalidParameterException("broken databits");
     }
 
     int getStopBitsForRXTX() {
         switch (stopBits) {
         case BITS_1:
             return SerialPort.STOPBITS_1;
         case BITS_1_5:
             return SerialPort.STOPBITS_1_5;
         case BITS_2:
             return SerialPort.STOPBITS_2;
         }
         throw new InvalidParameterException("broken stopbits");
     }
 
     int getParityForRXTX() {
         switch (parity) {
         case EVEN:
             return SerialPort.PARITY_EVEN;
         case MARK:
             return SerialPort.PARITY_MARK;
         case NONE:
             return SerialPort.PARITY_NONE;
         case ODD:
             return SerialPort.PARITY_ODD;
         case SPACE:
             return SerialPort.PARITY_SPACE;
         }
         throw new InvalidParameterException("broken parity");
     }
 
     int getFLowControlForRXTX() {
         switch (flowControl) {
         case NONE:
             return SerialPort.FLOWCONTROL_NONE;
         case RTSCTS_IN:
             return SerialPort.FLOWCONTROL_RTSCTS_IN;
         case RTSCTS_OUT:
             return SerialPort.FLOWCONTROL_RTSCTS_OUT;
         case XONXOFF_IN:
             return SerialPort.FLOWCONTROL_XONXOFF_IN;
         case XONXOFF_OUT:
             return SerialPort.FLOWCONTROL_XONXOFF_OUT;
         }
         throw new InvalidParameterException("broken stopbits");
     }
 }