Android Open Source - MassRoute Mass Route Service

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License

The source code is released under:

Copyright (c) 2010 Todd Anderson http://www.custardbelly.com/blog Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (th...

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Java Source Code

package com.custardbelly.massdot.service;
/*  w w w  .j a v  a  2s .  c  o  m*/
import java.net.MalformedURLException;
import java.net.URL;

import android.content.Context;
import android.os.AsyncTask;

import com.custardbelly.massdot.service.responder.IRoutesConfigServiceResponder;
import com.custardbelly.massdot.service.responder.IRoutesServiceResponder;
import com.custardbelly.massdot.service.responder.IStopPredictionsServiceResponder;

public class MassRouteService implements IMassRouteService
{
  private RouteListTask _routeListTask;
  private RouteConfigTask _routeConfigTask;
  private StopPredictionTask _predictionTask;
  private ServiceTaskQueue _taskQueue;
  
  public MassRouteService( Context context )
  {
    _taskQueue = new ServiceTaskQueue( context );
  }
  
  public AsyncTask<URL, Integer, Long> getRoutes( IRoutesServiceResponder responder )
  {  
    try
    {
      URL url = new URL( "http://webservices.nextbus.com/service/publicXMLFeed?command=routeList&a=mbta" );
      // Set up task if not exists.
      if( _routeListTask == null )
      {
        _routeListTask = new RouteListTask( responder, _taskQueue );
      }
      // Supply responder if different.
      if( _routeListTask.getResponder() != responder )
      {
        _routeListTask.setResponder( responder );
      }
      // Push to task queue to ensure it is run in  accordance to MassDOT requirement.
      _taskQueue.push( _routeListTask, url, true );
      // Return.
      return _routeListTask;
    }
    catch( MalformedURLException e )
    {
      throw new RuntimeException( e );
    }
  }
  
  public AsyncTask<URL, Integer, Long> getRouteConfig( String tagId, IRoutesConfigServiceResponder responder )
  {
    try
    {
      String urlString = "http://webservices.nextbus.com/service/publicXMLFeed?command=routeConfig&a=mbta&r=" + tagId;
      URL url = new URL( urlString );
      if( _routeConfigTask == null )
      {
        _routeConfigTask = new RouteConfigTask( responder, _taskQueue );
      }
      if( _routeConfigTask.getResponder() != responder )
      {
        _routeConfigTask.setResponder( responder );
      }
      // Push to task queue to ensure it is run in  accordance to MassDOT requirement.
      _taskQueue.push( _routeConfigTask, url, true );
      return _routeConfigTask;
    }
    catch( MalformedURLException e )
    {
      throw new RuntimeException( e );
    }
  }
  
  public AsyncTask<URL, Integer, Long> getStopPredictions( String routeId, String stopId, IStopPredictionsServiceResponder responder )
  {
    try
    {
      String urlString = "http://webservices.nextbus.com/service/publicXMLFeed?command=predictions&a=mbta&r=" + routeId + "&s=" + stopId;
      URL url = new URL( urlString );
      if( _predictionTask == null )
      {
        _predictionTask = new StopPredictionTask( responder, _taskQueue );
      }
      if( _predictionTask.getResponder() != responder )
      {
        _predictionTask.setResponder( responder );
      }
      // Push to task queue to ensure it is run in  accordance to MassDOT requirement.
      _taskQueue.push( _predictionTask, url, true );
      return _predictionTask;
    }
    catch( MalformedURLException e )
    {
      throw new RuntimeException( e );
    }
  }
}

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