SiteToOtner.java

package bao.distance;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import bao.BerkeleyDB.BerkeleyDB;

/**
 * �������㵽�������������͵㡢O2O�̻����ľ���
 * */
public class SiteToOtner{
	
	/**
	 * ����������㵽�����������͵��O2O�̻��ľ��벢����Berkeley DB���ݿ�
	 * 
	 * @param site_Lng_Lat ����id���侭γ��
	 * @param spot_Lng_Lat ���͵�id���侭γ��
	 * @param shop_Lng_Lat O2O�̻�id���侭γ��
	 * 
	 * @throws IOException 
	 * */
	public void site_Dist_SpotAndShop(Map<String, double[]> site_Lng_Lat,Map<String, double[]> spot_Lng_Lat,Map<String, double[]> shop_Lng_Lat,String site_savePath) throws IOException{
		
		//�����ݴ������ݿ�
		BerkeleyDB save_Site_Site = new BerkeleyDB(site_savePath+"site_site_distance");//��ʽ��Map<Site_id,Map<Site_id,distance>>
		BerkeleyDB save_Site_Spot = new BerkeleyDB(site_savePath+"site_spot_distance");//��ʽ��Map<Site_id,Map<Spot_id,distance>>
		BerkeleyDB save_Site_Shop = new BerkeleyDB(site_savePath+"site_shop_distance");//��ʽ��Map<Site_id,Map<Shop_id,distance>>
		BerkeleyDB save_Site_SiteAndSpotAndShop = new BerkeleyDB(site_savePath+"site_siteandspotandshop_distance");//��ʽ��Map<Site_id,Map<Site_id OR Spot_id OR Shop_id,distance>>
		
		for(Entry<String, double[]> siteEntry:site_Lng_Lat.entrySet()){
			String Site_id=siteEntry.getKey();//����id��e.g. A001�� 
			double[] Lng_Lat_Site=siteEntry.getValue();
			double lng1=Lng_Lat_Site[0];//���㾭��
			double lat1=Lng_Lat_Site[1];//�����
			
			HashMap<String, Double> cacheAll=new HashMap<>();
			
			//�������㵽����ľ��룬���洢
			HashMap<String, Double> cacheSite_Site=new HashMap<>();
			for(Entry<String, double[]> siteEntry2:site_Lng_Lat.entrySet()){
				String Site_id2 = siteEntry2.getKey();//����id��e.g. A001��
				double[] Lng_Lat_Site2=siteEntry2.getValue();
				double lng2 = Lng_Lat_Site2[0];//���㾭��
				double lat2 = Lng_Lat_Site2[1];//�����
				
				double distance=computeDistance(lng1, lat1, lng2, lat2);
				cacheSite_Site.put(Site_id2,distance);
				cacheAll.put(Site_id2,distance);
			}
			//�洢���㵽����ľ���
			save_Site_Site.putData(Site_id, MapSortByValue.sortByValue(cacheSite_Site));//�����뽵������
			
			//�������㵽�������͵�ľ��룬���洢
			HashMap<String, Double> cacheSite_Spot=new HashMap<>();
			for(Entry<String, double[]> spotEntry:spot_Lng_Lat.entrySet()){
				String Spot_id = spotEntry.getKey();// ���͵�id ��e.g. B0001�� 
				double[] Lng_Lat_Spot=spotEntry.getValue();
				double lng2 = Lng_Lat_Spot[0];//���͵㾭��
				double lat2 = Lng_Lat_Spot[1];// ���͵�γ��
				
				double distance=computeDistance(lng1, lat1, lng2, lat2);
				cacheSite_Spot.put(Spot_id,distance);
				cacheAll.put(Spot_id,distance);
			}
			//�洢���㵽���͵�ľ���
			save_Site_Spot.putData(Site_id, MapSortByValue.sortByValue(cacheSite_Spot));//�����뽵������
			
			// �������㵽����O2O�̻��ľ��룬���洢
			HashMap<String, Double> cacheSite_Shop=new HashMap<>();
			for (Entry<String, double[]> shopEntry : shop_Lng_Lat.entrySet()) {
				String Shop_id = shopEntry.getKey();//  �̻�id ��e.g. S001�� 
				double[] Lng_Lat_Shop = shopEntry.getValue();
				double lng2 = Lng_Lat_Shop[0];//�̻�����
				double lat2 = Lng_Lat_Shop[1];//�̻�γ��
				
				double distance=computeDistance(lng1, lat1, lng2, lat2);
				cacheSite_Shop.put(Shop_id, distance);
				cacheAll.put(Shop_id, distance);
			}
			// �洢���㵽O2O�̻��ľ���
			save_Site_Shop.putData(Site_id, MapSortByValue.sortByValue(cacheSite_Shop));//�����뽵������
			
			//�洢���㵽���͵��O2O�̻��ľ���
			save_Site_SiteAndSpotAndShop.putData(Site_id, MapSortByValue.sortByValue(cacheAll));//�����뽵������
		}
		save_Site_Site.close();
		save_Site_Spot.close();
		save_Site_Shop.close();
		save_Site_SiteAndSpotAndShop.close();
	}
	
	
	/**
	 * ���ݾ�γ�ȼ������
	 * 
	 */
	private double computeDistance(double lng1, double lat1, double lng2, double lat2) {

		double lat = (lat1 - lat2) / 2.0;
		double lng = (lng1 - lng2) / 2.0;
		double cache = Math.sin(Math.PI / 180 * lat) * Math.sin(Math.PI / 180 * lat) + Math.cos(Math.PI / 180 * lat1)
				* Math.cos(Math.PI / 180 * lat2) * Math.sin(Math.PI / 180 * lng) * Math.sin(Math.PI / 180 * lng);

		double R = 6378137;
		double S = 2 * R * Math.asin(Math.sqrt(cache));
		
		return S;
	}
}