traininfo/provider/OfflineStationProvider.java

package dk.thoerup.traininfo.provider;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.URLEncoder;
import java.util.Collections;
import java.util.Comparator;
import java.util.LinkedList;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

import android.content.Context;
import android.location.Location;
import android.util.Log;
import dk.thoerup.android.traininfo.common.StationBean;
import dk.thoerup.android.traininfo.common.StationEntry;
import dk.thoerup.genericjavautils.HttpUtil;
import dk.thoerup.traininfo.util.DownloadUtil;
import dk.thoerup.traininfo.util.IntSet;
import dk.thoerup.traininfo.util.XmlUtil;

public class OfflineStationProvider implements StationProvider {
        
        StationBean stations = new StationBean();

        public boolean hasStations() {
                return (stations != null && stations.entries.size() > 0);
        }
        

        public boolean loadStations(Context context) throws Exception {
                long start = System.currentTimeMillis();
                
                stations.entries.clear(); //TODO: remove
                
                File parent = context.getFilesDir();
                File stationsFile = new File(parent, "stations.bin");
                
                if (!stationsFile.exists())
                        return false;
                
                /*int size = (int) stationsFile.length();
                byte data[] = new byte[size];
                
                RandomAccessFile raf = new RandomAccessFile(stationsFile, "r");
                raf.readFully(data);
                
                Serializer serializer = new Persister();
                stations = serializer.read(StationBean.class,  new String(data, "ISO-8859-1") );*/
                
                

                ObjectInputStream in = new ObjectInputStream( new FileInputStream(stationsFile) );

                int length = in.readInt(); // first field is the length
                
                for (int i=0; i<length; i++) {                          
                        StationEntry entry = (StationEntry) in.readObject();
                        updateSearchStrings(entry);
                        stations.entries.add( entry );
                }
                
                in.close();

                
                Log.e("OFFLINE", "loaded" + stations.entries.size());
                logElapsedTime(start, "loadStations");
                
                return true;
        }
        
        public void updateSearchStrings(StationEntry entry) {           
                entry.nameLower = entry.getName().toLowerCase();
                entry.nameInternational = entry.nameLower.replace("æ", "ae").replace("ø", "oe").replace("å", "aa");
        }
        
        public void downloadStations(Context context) throws Exception {
                File parent = context.getFilesDir();
                File stationsFile = new File(parent, "stations.bin");

                
                byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
                Serializer serializer = new Persister();
                stations = serializer.read(StationBean.class,  new String(data, "ISO-8859-1") );
                
                
                ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
                Log.e("OFFLINE", "data size" + data.length);
                
                out.writeInt( stations.entries.size() ); //start with writing the length of the dataset
                
                for (StationEntry entry : stations.entries) {
                        updateSearchStrings( entry ); //prepare name fields for byName search
                        out.writeObject(entry);
                }
                
                out.close();            
        }
        
        

        @Override
        public void purgeOldEntries() {
        }

        Comparator<StationEntry> distanceComparator = new Comparator<StationEntry>() {
                @Override
                public int compare(StationEntry object1, StationEntry object2) {
                        if (object1.getCalcdist() == object2.getCalcdist())                                     
                                return 0;
                        
                        if (object1.getCalcdist() > object2.getCalcdist())
                                return 1;
                        else
                                return -1;
                }               
        };
        
        @Override
        public StationBean lookupStationsByLocation(Location location) {
                
                statsByLocation(location);
                
                long start = System.currentTimeMillis();
                Location tmpLoc = new Location("GPS");
                
                LinkedList<StationEntry> entries = new LinkedList<StationEntry>() ;
                
                for (StationEntry entry : stations.entries) {
                        tmpLoc.setLatitude(entry.getLatitude());
                        tmpLoc.setLongitude(entry.getLongitude());
                        
                        int distance = (int) location.distanceTo(tmpLoc);
                        
                        if (entries.size() <8 || entries.getLast().getCalcdist() > distance) {
                                entry.setCalcdist(distance);
                                
                                if (entries.size() == 8)
                                        entries.removeLast();
                                
                                entries.addLast(entry);
                                
                                Collections.sort( entries, distanceComparator);
                        }                       
                }
                
                logElapsedTime(start, "location_stage1");
                
                Collections.sort( entries, distanceComparator);
                
                StationBean tmpStations = new StationBean();
                for (int i = 0; i<8 && i<entries.size(); i++) {
                        tmpStations.entries.add( entries.get(i) );
                }
                
                logElapsedTime(start, "location");
                return tmpStations;
        }
        
        private void logElapsedTime(long start, String method) {
                long now = System.currentTimeMillis();
                
                Log.i("TrainInfo", "Search by " + method + " elapsed " + (now-start) );
        }

        @Override
        public StationBean lookupStationsByName(String name) {
                
                long start = System.currentTimeMillis();
                
                name = name.toLowerCase();
                StationBean tmpStations = new StationBean();
                for (StationEntry entry : stations.entries) {
                        if (entry.nameLower.startsWith(name) || entry.nameInternational.startsWith(name) ) {
                                tmpStations.entries.add(entry);
                        }
                }
                logElapsedTime(start, "name");                          
                return tmpStations;
        }

        @Override
        public StationBean lookupStationsByIds(String ids) {
                statsByIds(ids);
                
                IntSet idset = new IntSet();
                idset.fromString(ids);
                
                StationBean tmpStations = new StationBean();
                for (StationEntry entry : stations.entries) {
                        if (idset.contains( entry.getId() ) ) {
                                tmpStations.entries.add(entry);
                        }
                }
                
                return tmpStations;
        }
        

        private void statsByLocation(Location location) {
                double lat = XmlStationProvider.roundToPlaces(location.getLatitude(), 4);
                double lng = XmlStationProvider.roundToPlaces(location.getLongitude(), 4);
                
                final String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + lat + "&longitude=" + lng + "&dummy=1";
                Log.i("url", url);
                urlSender(url);
        }
        
        private void statsByName(String name) { 
                
                try {
                        name = URLEncoder.encode(name, "ISO8859-1");    
                } catch (Exception e) {
                        Log.e("lookupStations", "Encoding failed", e);//if encoding fails use original and hope for the best
                }
                
                String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + name + "&dummy=1";
                Log.i("url", url);
                urlSender(url);
        }
        
        private void statsByIds(String ids) {   
                final String url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids + "&dummy=1";
                Log.i("url", url);
                urlSender(url);
        }
        
        private void urlSender(final String url) {
                Thread t = new Thread(new Runnable() {

                        @Override
                        public void run() {
                                try {
                                        DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
                                } catch (IOException e) {
                                        Log.e("TrainInfo", "stats failed");
                                }                               
                        }                       
                });
                t.start();
        }
        

}
1	package dk.thoerup.traininfo.provider;
2
3	import java.io.File;
4	import java.io.FileInputStream;
5	import java.io.FileOutputStream;
6	import java.io.IOException;
7	import java.io.ObjectInputStream;
8	import java.io.ObjectOutputStream;
9	import java.net.URLEncoder;
10	import java.util.Collections;
11	import java.util.Comparator;
12	import java.util.LinkedList;
13
14	import org.simpleframework.xml.Serializer;
15	import org.simpleframework.xml.core.Persister;
16
17	import android.content.Context;
18	import android.location.Location;
19	import android.util.Log;
20	import dk.thoerup.android.traininfo.common.StationBean;
21	import dk.thoerup.android.traininfo.common.StationEntry;
22	import dk.thoerup.genericjavautils.HttpUtil;
23	import dk.thoerup.traininfo.util.DownloadUtil;
24	import dk.thoerup.traininfo.util.IntSet;
25	import dk.thoerup.traininfo.util.XmlUtil;
26
27	public class OfflineStationProvider implements StationProvider {
28
29	StationBean stations = new StationBean();
30
31	public boolean hasStations() {
32	return (stations != null && stations.entries.size() > 0);
33	}
34
35
36	public boolean loadStations(Context context) throws Exception {
37	long start = System.currentTimeMillis();
38
39	stations.entries.clear(); //TODO: remove
40
41	File parent = context.getFilesDir();
42	File stationsFile = new File(parent, "stations.bin");
43
44	if (!stationsFile.exists())
45	return false;
46
47	/*int size = (int) stationsFile.length();
48	byte data[] = new byte[size];
49
50	RandomAccessFile raf = new RandomAccessFile(stationsFile, "r");
51	raf.readFully(data);
52
53	Serializer serializer = new Persister();
54	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );*/
55
56
57
58	ObjectInputStream in = new ObjectInputStream( new FileInputStream(stationsFile) );
59
60	int length = in.readInt(); // first field is the length
61
62	for (int i=0; i<length; i++) {
63	StationEntry entry = (StationEntry) in.readObject();
64	updateSearchStrings(entry);
65	stations.entries.add( entry );
66	}
67
68	in.close();
69
70
71	Log.e("OFFLINE", "loaded" + stations.entries.size());
72	logElapsedTime(start, "loadStations");
73
74	return true;
75	}
76
77	public void updateSearchStrings(StationEntry entry) {
78	entry.nameLower = entry.getName().toLowerCase();
79	entry.nameInternational = entry.nameLower.replace("æ", "ae").replace("ø", "oe").replace("å", "aa");
80	}
81
82	public void downloadStations(Context context) throws Exception {
83	File parent = context.getFilesDir();
84	File stationsFile = new File(parent, "stations.bin");
85
86
87	byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
88	Serializer serializer = new Persister();
89	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );
90
91
92	ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
93	Log.e("OFFLINE", "data size" + data.length);
94
95	out.writeInt( stations.entries.size() ); //start with writing the length of the dataset
96
97	for (StationEntry entry : stations.entries) {
98	updateSearchStrings( entry ); //prepare name fields for byName search
99	out.writeObject(entry);
100	}
101
102	out.close();
103	}
104
105
106
107	@Override
108	public void purgeOldEntries() {
109	}
110
111	Comparator<StationEntry> distanceComparator = new Comparator<StationEntry>() {
112	@Override
113	public int compare(StationEntry object1, StationEntry object2) {
114	if (object1.getCalcdist() == object2.getCalcdist())
115	return 0;
116
117	if (object1.getCalcdist() > object2.getCalcdist())
118	return 1;
119	else
120	return -1;
121	}
122	};
123
124	@Override
125	public StationBean lookupStationsByLocation(Location location) {
126
127	statsByLocation(location);
128
129	long start = System.currentTimeMillis();
130	Location tmpLoc = new Location("GPS");
131
132	LinkedList<StationEntry> entries = new LinkedList<StationEntry>() ;
133
134	for (StationEntry entry : stations.entries) {
135	tmpLoc.setLatitude(entry.getLatitude());
136	tmpLoc.setLongitude(entry.getLongitude());
137
138	int distance = (int) location.distanceTo(tmpLoc);
139
140	if (entries.size() <8 \|\| entries.getLast().getCalcdist() > distance) {
141	entry.setCalcdist(distance);
142
143	if (entries.size() == 8)
144	entries.removeLast();
145
146	entries.addLast(entry);
147
148	Collections.sort( entries, distanceComparator);
149	}
150	}
151
152	logElapsedTime(start, "location_stage1");
153
154	Collections.sort( entries, distanceComparator);
155
156	StationBean tmpStations = new StationBean();
157	for (int i = 0; i<8 && i<entries.size(); i++) {
158	tmpStations.entries.add( entries.get(i) );
159	}
160
161	logElapsedTime(start, "location");
162	return tmpStations;
163	}
164
165	private void logElapsedTime(long start, String method) {
166	long now = System.currentTimeMillis();
167
168	Log.i("TrainInfo", "Search by " + method + " elapsed " + (now-start) );
169	}
170
171	@Override
172	public StationBean lookupStationsByName(String name) {
173
174	long start = System.currentTimeMillis();
175
176	name = name.toLowerCase();
177	StationBean tmpStations = new StationBean();
178	for (StationEntry entry : stations.entries) {
179	if (entry.nameLower.startsWith(name) \|\| entry.nameInternational.startsWith(name) ) {
180	tmpStations.entries.add(entry);
181	}
182	}
183	logElapsedTime(start, "name");
184	return tmpStations;
185	}
186
187	@Override
188	public StationBean lookupStationsByIds(String ids) {
189	statsByIds(ids);
190
191	IntSet idset = new IntSet();
192	idset.fromString(ids);
193
194	StationBean tmpStations = new StationBean();
195	for (StationEntry entry : stations.entries) {
196	if (idset.contains( entry.getId() ) ) {
197	tmpStations.entries.add(entry);
198	}
199	}
200
201	return tmpStations;
202	}
203
204
205	private void statsByLocation(Location location) {
206	double lat = XmlStationProvider.roundToPlaces(location.getLatitude(), 4);
207	double lng = XmlStationProvider.roundToPlaces(location.getLongitude(), 4);
208
209	final String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + lat + "&longitude=" + lng + "&dummy=1";
210	Log.i("url", url);
211	urlSender(url);
212	}
213
214	private void statsByName(String name) {
215
216	try {
217	name = URLEncoder.encode(name, "ISO8859-1");
218	} catch (Exception e) {
219	Log.e("lookupStations", "Encoding failed", e);//if encoding fails use original and hope for the best
220	}
221
222	String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + name + "&dummy=1";
223	Log.i("url", url);
224	urlSender(url);
225	}
226
227	private void statsByIds(String ids) {
228	final String url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids + "&dummy=1";
229	Log.i("url", url);
230	urlSender(url);
231	}
232
233	private void urlSender(final String url) {
234	Thread t = new Thread(new Runnable() {
235
236	@Override
237	public void run() {
238	try {
239	DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
240	} catch (IOException e) {
241	Log.e("TrainInfo", "stats failed");
242	}
243	}
244	});
245	t.start();
246	}
247
248
249	}