Android Open Source - mha-android Discovery Description

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License

The source code is released under:

Copyright (c) 2011-2012 Cameron Porter, Ryan Brown http://github.com/camporter/mha-android Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated...

Java Source Code

package com.teamacra.myhomeaudio.discovery;
/*from ww w.  j  ava 2 s.  c o m*/
import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.net.UnknownHostException;

public class DiscoveryDescription implements Comparable<DiscoveryDescription> {

  private String instanceName;
  private String address;
  private int clientPort;
  private int nodePort;

  public DiscoveryDescription(String instanceName, String address, int clientPort, int nodePort) {
    this.instanceName = instanceName;
    this.address = address;
    this.clientPort = clientPort;
    this.nodePort = nodePort;
  }

  public DiscoveryDescription() {
  }

  public String getInstanceName() {
    return instanceName;
  }

  public void setInstanceName(String serviceDescription) {
    this.instanceName = serviceDescription;
  }

  /**
   * Makes the string URL encoded, which makes it easier to deal with in
   * transit.
   * 
   * @return
   */
  protected String getEncodedInstanceName() {
    try {
      return URLEncoder.encode(getInstanceName(), "UTF-8");
    } catch (UnsupportedEncodingException uee) {
      return null;
    }
  }
  
  public String getAddress() {
    return address;
  }
  
  /**
   * Gets the port that clients should make requests to.
   * 
   * @return
   */
  public int getClientPort() {
    return clientPort;
  }

  /**
   * Gets the port that nodes should make requests to.
   * 
   * @return
   */
  public int getNodePort() {
    return nodePort;
  }
  
  public void setAddress(String address) {
    this.address = address;
  }

  public void setClientPort(int clientPort) {
    this.clientPort = clientPort;
  }

  public void setNodePort(int nodePort) {
    this.nodePort = nodePort;
  }

  /**
   * Get the string representation of the description. When we want to
   * transmit this data to another client or node, we send it in the format
   * defined by this method.
   * 
   * @return Concatenated string with all of the description's properties.
   */
  public String toString() {
    StringBuffer buf = new StringBuffer();
    buf.append(getEncodedInstanceName());
    buf.append(" ");
    buf.append(address);
    buf.append(" ");
    buf.append(Integer.toString(clientPort));
    buf.append(" ");
    buf.append(Integer.toString(nodePort));
    return buf.toString();
  }

  public boolean equals(Object o) {
    if (o == this) {
      return true;
    }
    if (!(o instanceof DiscoveryDescription)) {
      return false;
    }
    DiscoveryDescription descriptor = (DiscoveryDescription) o;
    return descriptor.getInstanceName().equals(getInstanceName());
  }

  public int hashCode() {
    return getInstanceName().hashCode();
  }

  public int compareTo(DiscoveryDescription sd) throws ClassCastException {
    if (sd == null) {
      throw new NullPointerException();
    }
    if (sd == this) {
      return 0;
    }

    return getInstanceName().compareTo(sd.getInstanceName());
  }

  /**
   * When we get a packet that should contain the string-based properties
   * included in a DiscoveryDescription object, we make sure that it follows
   * the same format used in the toString method.
   * 
   * @param encodedInstanceName
   *            Instance name for the server that is URL encoded.
   * @param addressAsString
   *            The IP address of the server.
   * @param clientPortAsString
   *            The client port for the server.
   * @param nodePortAsString
   *            The node port for the server.
   * @return A new DiscoveryDescription object that represents the data from
   *         the given strings.
   * @see DiscoveryDescription#toString()
   */
  public static DiscoveryDescription parse(String encodedInstanceName,
      String addressAsString, String clientPortAsString, String nodePortAsString) {

    DiscoveryDescription descriptor = new DiscoveryDescription();
    
    // Put the instance name
    try {
      String name = URLDecoder.decode(encodedInstanceName, "UTF-8");
      if (name == null || name.length() == 0) {
        return null;
      }
      descriptor.setInstanceName(name);
    } catch (UnsupportedEncodingException uee) {
      uee.printStackTrace();
      return null;
    }
    
    // Put the address
    descriptor.setAddress(addressAsString);
    
    // Put the client and node ports
    try {
      int p = Integer.parseInt(clientPortAsString);
      descriptor.setClientPort(p);
      p = Integer.parseInt(nodePortAsString);
      descriptor.setNodePort(p);
    } catch (NumberFormatException nfe) {
      System.err.println("Unexpected exception: " + nfe);
      nfe.printStackTrace();
      return null;
    }

    return descriptor;
  }
}

Java Source Code List

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