PoiClassifier.java :  » UnTagged » cubt » edu » cuhk » cubt » classifier » Android Open Source

package edu.cuhk.cubt.classifier;

import android.location.Location;
import android.os.Handler;
import android.os.Message;
import edu.cuhk.cubt.bus.Poi;
import edu.cuhk.cubt.bus.Stop;
import edu.cuhk.cubt.sccm.LocationSensor;
import edu.cuhk.cubt.state.PoiState;
import edu.cuhk.cubt.store.LocationHistory;
import edu.cuhk.cubt.store.PoiData;

public class PoiClassifier extends AbstractClassifier<PoiState> {


  ClassifierManager manager;
  
  LocationHistory locationHistory;
  LocationSensor locationSensor;
  
  Location location;
  
  Poi poi;
  
  public PoiClassifier(ClassifierManager manager, 
      LocationSensor locationSensor) {
    super(PoiState.UNKNOWN);
    this.locationSensor = locationSensor;
    this.manager = manager;
  }
  
  public Location getLocation(){
    return location;
  }
  
  public Poi getPoi(){
    return poi;
  }

  @Override
  protected void processClassification() {
    if(this.location == locationSensor.getLastLocation() ) return;
    
    this.location = locationSensor.getLastLocation();
    
    poi = PoiData.getPoiByLocation(location);
    
    if(poi==null){
      this.setState(PoiState.OUTSIDE_POI);
    }else if(poi instanceof Stop){
      this.setState(PoiState.INSIDE_BUS_STOP);
    }else{
      this.setState(PoiState.INSIDE_CHECKPOINT);
    }
    
  }
  
  @Override
  protected void onStart() {
    locationSensor.addHandler(mHandler);
    processClassification();
  }

  @Override
  protected void onStop() {
    locationSensor.removeHandler(mHandler);
  }
  
  Handler mHandler = new Handler(){
    @Override
    public void handleMessage(Message msg){
      switch(msg.what){
      case LocationSensor.MSG_NEW_LOCATION:
        processClassification();
        break;
      }
    }
  };

}