Android Open Source - ubihelper Message

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License

The source code is released under:
GNU General Public License
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Java Source Code

/**
 * Copyright (c) 2012 The University of Nottingham
 * /*w  ww . j a  v  a  2 s .  com*/
 * This file is part of ubihelper
 *
 *  ubihelper is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  ubihelper is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with ubihelper. If not, see <http://www.gnu.org/licenses/>.
 *  
 *  @author Chris Greenhalgh (cmg@cs.nott.ac.uk), The University of Nottingham
 */
package uk.ac.horizon.ubihelper.net;

import java.util.Comparator;
import java.util.List;

/** 
 * A message as sent over a PeerConnection.
 * 
 * @author cmg
 *
 */
public class Message {
  public enum Type {  
    UNDEFINED(0),
    HELLO(1),
    MANAGEMENT(2),
    REQUEST(3),
    RESPONSE(4);
    
    private byte code;
    Type(int code) { this.code = (byte)code; }
    public byte getCode() { return code; }
  }
  public static final String HELLO_BODY_PREFIX = "application/x-ubihelper;version=";
  public static final int VERSION = 1;
  
  /** type - for all messages */
  public Type type;
  /** request/status line - for REQUEST/RESPONSE only */
  public String firstLine;
  /** headers - for REQUEST/RESPONSE only (and optional there, as well) */
  public List<String> headerLines;
  /** body of message - whole for HELLO, MANAGEMENT */
  public String body;
  /** priority (send-only) - as far as possible messages and fragments will be offered to the network in priority order.
   * 0 (default) is low. 
   */
  public int priority;
  
  public Message() {}

  /**
   * @param type
   * @param firstLine
   * @param headerLines
   * @param body
   */
  public Message(Type type, String firstLine, List<String> headerLines,
      String body) {
    super();
    this.type = type;
    this.firstLine = firstLine;
    this.headerLines = headerLines;
    this.body = body;
  }

  /* (non-Javadoc)
   * @see java.lang.Object#toString()
   */
  @Override
  public String toString() {
    return "Message [type=" + type + ", firstLine=" + firstLine
        + ", headerLines=" + headerLines + ", body=" + body + "]";
  }
  
  /* (non-Javadoc)
   * @see java.lang.Object#hashCode()
   */
  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((body == null) ? 0 : body.hashCode());
    result = prime * result
        + ((firstLine == null) ? 0 : firstLine.hashCode());
    result = prime * result
        + ((headerLines == null) ? 0 : headerLines.hashCode());
    result = prime * result + priority;
    result = prime * result + ((type == null) ? 0 : type.hashCode());
    return result;
  }

  /* (non-Javadoc)
   * @see java.lang.Object#equals(java.lang.Object)
   */
  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    Message other = (Message) obj;
    if (body == null) {
      if (other.body != null)
        return false;
    } else if (!body.equals(other.body))
      return false;
    if (firstLine == null) {
      if (other.firstLine != null)
        return false;
    } else if (!firstLine.equals(other.firstLine))
      return false;
    if (headerLines == null) {
      if (other.headerLines != null)
        return false;
    } else if (!headerLines.equals(other.headerLines))
      return false;
    if (priority != other.priority)
      return false;
    if (type != other.type)
      return false;
    return true;
  }

  static class PriorityComparator implements Comparator<Message> {
    public int compare(Message m1, Message m2) {
      return new Integer(m1.priority).compareTo(m2.priority);
    }    
  }

  public static String getHelloBody() {
    return HELLO_BODY_PREFIX+VERSION;
  }
}
Java Source Code List
