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	torben	1545	package dk.thoerup.traininfo.provider;
2
3			import java.io.File;
4	torben	1546	import java.io.FileInputStream;
5			import java.io.FileOutputStream;
6	torben	1559	import java.io.IOException;
7	torben	1546	import java.io.ObjectInputStream;
8			import java.io.ObjectOutputStream;
9	torben	1559	import java.net.URLEncoder;
10	torben	1545	import java.util.Collections;
11			import java.util.Comparator;
12	torben	1553	import java.util.LinkedList;
13	torben	1545
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	torben	1559	import dk.thoerup.traininfo.util.DownloadUtil;
24	torben	1545	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	torben	1717	boolean statsByNameSend = false;
32
33	torben	1572	public boolean hasStations() {
34			return (stations != null && stations.entries.size() > 0);
35			}
36
37	torben	1545
38			public boolean loadStations(Context context) throws Exception {
39	torben	1553	long start = System.currentTimeMillis();
40
41	torben	1628	StationBean tmpStations = new StationBean();
42	torben	1546
43	torben	1545	File parent = context.getFilesDir();
44	torben	1546	File stationsFile = new File(parent, "stations.bin");
45	torben	1545
46			if (!stationsFile.exists())
47			return false;
48
49	torben	1551	/*int size = (int) stationsFile.length();
50			byte data[] = new byte[size];
51	torben	1545
52			RandomAccessFile raf = new RandomAccessFile(stationsFile, "r");
53			raf.readFully(data);
54
55			Serializer serializer = new Persister();
56	torben	1546	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );*/
57	torben	1545
58	torben	1546
59	torben	1568
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	torben	1628	tmpStations.entries.add( entry );
68	torben	1546	}
69
70	torben	1568	in.close();
71
72	torben	1628	stations = tmpStations; // når indlæsningen er ok skifter vi over
73	torben	1568
74	torben	1628	Log.e("OFFLINE", "loaded" + tmpStations.entries.size());
75	torben	1553	logElapsedTime(start, "loadStations");
76	torben	1545
77			return true;
78	torben	1562	}
79	torben	1545
80	torben	1562	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	torben	1546	public void downloadStations(Context context) throws Exception {
86	torben	1545	File parent = context.getFilesDir();
87	torben	1546	File stationsFile = new File(parent, "stations.bin");
88	torben	1545
89	torben	1638	long start = System.currentTimeMillis();
90			byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
91			logElapsedTime(start, "download XML");
92	torben	1547
93	torben	1638
94			Serializer serializer = new Persister();
95
96			start = System.currentTimeMillis();
97	torben	1627	StationBean tmpStations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );
98	torben	1638	logElapsedTime(start, "parse XML");
99	torben	1545
100	torben	1546
101			ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
102	torben	1545	Log.e("OFFLINE", "data size" + data.length);
103	torben	1546
104	torben	1627	out.writeInt( tmpStations.entries.size() ); //start with writing the length of the dataset
105	torben	1568
106	torben	1627	for (StationEntry entry : tmpStations.entries) {
107	torben	1562	updateSearchStrings( entry ); //prepare name fields for byName search
108	torben	1546	out.writeObject(entry);
109			}
110
111	torben	1627	out.close();
112
113			stations = tmpStations; // når alt er ok skifter vi over til ny udgave
114	torben	1545	}
115
116
117
118			@Override
119			public void purgeOldEntries() {
120			}
121
122	torben	1553	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	torben	1545
135			@Override
136			public StationBean lookupStationsByLocation(Location location) {
137
138	torben	1559	statsByLocation(location);
139
140	torben	1553	long start = System.currentTimeMillis();
141	torben	1545	Location tmpLoc = new Location("GPS");
142
143	torben	1553	LinkedList<StationEntry> entries = new LinkedList<StationEntry>() ;
144	torben	1545
145			for (StationEntry entry : stations.entries) {
146			tmpLoc.setLatitude(entry.getLatitude());
147			tmpLoc.setLongitude(entry.getLongitude());
148
149	torben	1553	int distance = (int) location.distanceTo(tmpLoc);
150	torben	1545
151	torben	1553	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	torben	1545	}
162
163	torben	1553	logElapsedTime(start, "location_stage1");
164	torben	1545
165	torben	1553	Collections.sort( entries, distanceComparator);
166	torben	1545
167			StationBean tmpStations = new StationBean();
168	torben	1595	for (int i = 0; i<8 && i<entries.size(); i++) {
169	torben	1545	tmpStations.entries.add( entries.get(i) );
170			}
171
172	torben	1553	logElapsedTime(start, "location");
173	torben	1545	return tmpStations;
174			}
175	torben	1553
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	torben	1545
182			@Override
183			public StationBean lookupStationsByName(String name) {
184	torben	1717
185			statsByName(name);
186	torben	1545
187	torben	1553	long start = System.currentTimeMillis();
188
189	torben	1545	name = name.toLowerCase();
190			StationBean tmpStations = new StationBean();
191			for (StationEntry entry : stations.entries) {
192	torben	1553	if (entry.nameLower.startsWith(name) \|\| entry.nameInternational.startsWith(name) ) {
193	torben	1545	tmpStations.entries.add(entry);
194			}
195			}
196	torben	1553	logElapsedTime(start, "name");
197	torben	1545	return tmpStations;
198			}
199
200			@Override
201			public StationBean lookupStationsByIds(String ids) {
202	torben	1559	statsByIds(ids);
203
204	torben	1545	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	torben	1559
217	torben	1545
218	torben	1559	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	torben	1717	if (statsByNameSend == true) {
229			return;
230			}
231			statsByNameSend = true;
232	torben	1559
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	torben	1545	}