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();

        boolean statsByNameSend = false;

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

        public boolean loadStations(Context context) throws Exception {
                long start = System.currentTimeMillis();
                
                StationBean tmpStations = new StationBean();
                
                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);
                        tmpStations.entries.add( entry );
                }
                
                in.close();

                stations = tmpStations; // når indlæsningen er ok skifter vi over
                
                Log.e("OFFLINE", "loaded" + tmpStations.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");

                long start = System.currentTimeMillis();
                byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
                logElapsedTime(start, "download XML");
                
                
                Serializer serializer = new Persister();                
                
                start = System.currentTimeMillis();
                StationBean tmpStations = serializer.read(StationBean.class,  new String(data, "ISO-8859-1") );
                logElapsedTime(start, "parse XML");
                
                
                ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
                Log.e("OFFLINE", "data size" + data.length);
                
                out.writeInt( tmpStations.entries.size() ); //start with writing the length of the dataset
                
                for (StationEntry entry : tmpStations.entries) {
                        updateSearchStrings( entry ); //prepare name fields for byName search
                        out.writeObject(entry);
                }
                
                out.close();
                
                stations = tmpStations; // når alt er ok skifter vi over til ny udgave
        }
        
        

        @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) {
        
                statsByName(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) { 
                if (statsByNameSend == true) {
                        return;
                }
                statsByNameSend = true;
                
                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	boolean statsByNameSend = false;
32
33	public boolean hasStations() {
34	return (stations != null && stations.entries.size() > 0);
35	}
36
37
38	public boolean loadStations(Context context) throws Exception {
39	long start = System.currentTimeMillis();
40
41	StationBean tmpStations = new StationBean();
42
43	File parent = context.getFilesDir();
44	File stationsFile = new File(parent, "stations.bin");
45
46	if (!stationsFile.exists())
47	return false;
48
49	/*int size = (int) stationsFile.length();
50	byte data[] = new byte[size];
51
52	RandomAccessFile raf = new RandomAccessFile(stationsFile, "r");
53	raf.readFully(data);
54
55	Serializer serializer = new Persister();
56	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );*/
57
58
59
60	ObjectInputStream in = new ObjectInputStream( new FileInputStream(stationsFile) );
61
62	int length = in.readInt(); // first field is the length
63
64	for (int i=0; i<length; i++) {
65	StationEntry entry = (StationEntry) in.readObject();
66	updateSearchStrings(entry);
67	tmpStations.entries.add( entry );
68	}
69
70	in.close();
71
72	stations = tmpStations; // når indlæsningen er ok skifter vi over
73
74	Log.e("OFFLINE", "loaded" + tmpStations.entries.size());
75	logElapsedTime(start, "loadStations");
76
77	return true;
78	}
79
80	public void updateSearchStrings(StationEntry entry) {
81	entry.nameLower = entry.getName().toLowerCase();
82	entry.nameInternational = entry.nameLower.replace("æ", "ae").replace("ø", "oe").replace("å", "aa");
83	}
84
85	public void downloadStations(Context context) throws Exception {
86	File parent = context.getFilesDir();
87	File stationsFile = new File(parent, "stations.bin");
88
89	long start = System.currentTimeMillis();
90	byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
91	logElapsedTime(start, "download XML");
92
93
94	Serializer serializer = new Persister();
95
96	start = System.currentTimeMillis();
97	StationBean tmpStations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );
98	logElapsedTime(start, "parse XML");
99
100
101	ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
102	Log.e("OFFLINE", "data size" + data.length);
103
104	out.writeInt( tmpStations.entries.size() ); //start with writing the length of the dataset
105
106	for (StationEntry entry : tmpStations.entries) {
107	updateSearchStrings( entry ); //prepare name fields for byName search
108	out.writeObject(entry);
109	}
110
111	out.close();
112
113	stations = tmpStations; // når alt er ok skifter vi over til ny udgave
114	}
115
116
117
118	@Override
119	public void purgeOldEntries() {
120	}
121
122	Comparator<StationEntry> distanceComparator = new Comparator<StationEntry>() {
123	@Override
124	public int compare(StationEntry object1, StationEntry object2) {
125	if (object1.getCalcdist() == object2.getCalcdist())
126	return 0;
127
128	if (object1.getCalcdist() > object2.getCalcdist())
129	return 1;
130	else
131	return -1;
132	}
133	};
134
135	@Override
136	public StationBean lookupStationsByLocation(Location location) {
137
138	statsByLocation(location);
139
140	long start = System.currentTimeMillis();
141	Location tmpLoc = new Location("GPS");
142
143	LinkedList<StationEntry> entries = new LinkedList<StationEntry>() ;
144
145	for (StationEntry entry : stations.entries) {
146	tmpLoc.setLatitude(entry.getLatitude());
147	tmpLoc.setLongitude(entry.getLongitude());
148
149	int distance = (int) location.distanceTo(tmpLoc);
150
151	if (entries.size() <8 \|\| entries.getLast().getCalcdist() > distance) {
152	entry.setCalcdist(distance);
153
154	if (entries.size() == 8)
155	entries.removeLast();
156
157	entries.addLast(entry);
158
159	Collections.sort( entries, distanceComparator);
160	}
161	}
162
163	logElapsedTime(start, "location_stage1");
164
165	Collections.sort( entries, distanceComparator);
166
167	StationBean tmpStations = new StationBean();
168	for (int i = 0; i<8 && i<entries.size(); i++) {
169	tmpStations.entries.add( entries.get(i) );
170	}
171
172	logElapsedTime(start, "location");
173	return tmpStations;
174	}
175
176	private void logElapsedTime(long start, String method) {
177	long now = System.currentTimeMillis();
178
179	Log.i("TrainInfo", "Search by " + method + " elapsed " + (now-start) );
180	}
181
182	@Override
183	public StationBean lookupStationsByName(String name) {
184
185	statsByName(name);
186
187	long start = System.currentTimeMillis();
188
189	name = name.toLowerCase();
190	StationBean tmpStations = new StationBean();
191	for (StationEntry entry : stations.entries) {
192	if (entry.nameLower.startsWith(name) \|\| entry.nameInternational.startsWith(name) ) {
193	tmpStations.entries.add(entry);
194	}
195	}
196	logElapsedTime(start, "name");
197	return tmpStations;
198	}
199
200	@Override
201	public StationBean lookupStationsByIds(String ids) {
202	statsByIds(ids);
203
204	IntSet idset = new IntSet();
205	idset.fromString(ids);
206
207	StationBean tmpStations = new StationBean();
208	for (StationEntry entry : stations.entries) {
209	if (idset.contains( entry.getId() ) ) {
210	tmpStations.entries.add(entry);
211	}
212	}
213
214	return tmpStations;
215	}
216
217
218	private void statsByLocation(Location location) {
219	double lat = XmlStationProvider.roundToPlaces(location.getLatitude(), 4);
220	double lng = XmlStationProvider.roundToPlaces(location.getLongitude(), 4);
221
222	final String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + lat + "&longitude=" + lng + "&dummy=1";
223	Log.i("url", url);
224	urlSender(url);
225	}
226
227	private void statsByName(String name) {
228	if (statsByNameSend == true) {
229	return;
230	}
231	statsByNameSend = true;
232
233	try {
234	name = URLEncoder.encode(name, "ISO8859-1");
235	} catch (Exception e) {
236	Log.e("lookupStations", "Encoding failed", e);//if encoding fails use original and hope for the best
237	}
238
239	String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + name + "&dummy=1";
240	Log.i("url", url);
241	urlSender(url);
242	}
243
244	private void statsByIds(String ids) {
245	final String url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids + "&dummy=1";
246	Log.i("url", url);
247	urlSender(url);
248	}
249
250	private void urlSender(final String url) {
251	Thread t = new Thread(new Runnable() {
252
253	@Override
254	public void run() {
255	try {
256	DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
257	} catch (IOException e) {
258	Log.e("TrainInfo", "stats failed");
259	}
260	}
261	});
262	t.start();
263	}
264
265
266	}