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++) {
                        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	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	1572	public boolean hasStations() {
32			return (stations != null && stations.entries.size() > 0);
33			}
34
35	torben	1545
36			public boolean loadStations(Context context) throws Exception {
37	torben	1553	long start = System.currentTimeMillis();
38
39	torben	1546	stations.entries.clear(); //TODO: remove
40
41	torben	1545	File parent = context.getFilesDir();
42	torben	1546	File stationsFile = new File(parent, "stations.bin");
43	torben	1545
44			if (!stationsFile.exists())
45			return false;
46
47	torben	1551	/*int size = (int) stationsFile.length();
48			byte data[] = new byte[size];
49	torben	1545
50			RandomAccessFile raf = new RandomAccessFile(stationsFile, "r");
51			raf.readFully(data);
52
53			Serializer serializer = new Persister();
54	torben	1546	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );*/
55	torben	1545
56	torben	1546
57	torben	1568
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	torben	1546	}
67
68	torben	1568	in.close();
69
70
71	torben	1545	Log.e("OFFLINE", "loaded" + stations.entries.size());
72	torben	1553	logElapsedTime(start, "loadStations");
73	torben	1545
74			return true;
75	torben	1562	}
76	torben	1545
77	torben	1562	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	torben	1546	public void downloadStations(Context context) throws Exception {
83	torben	1545	File parent = context.getFilesDir();
84	torben	1546	File stationsFile = new File(parent, "stations.bin");
85	torben	1545
86	torben	1547
87	torben	1545	byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
88	torben	1546	Serializer serializer = new Persister();
89			stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );
90	torben	1545
91	torben	1546
92			ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
93	torben	1545	Log.e("OFFLINE", "data size" + data.length);
94	torben	1546
95	torben	1568	out.writeInt( stations.entries.size() ); //start with writing the length of the dataset
96
97	torben	1546	for (StationEntry entry : stations.entries) {
98	torben	1562	updateSearchStrings( entry ); //prepare name fields for byName search
99	torben	1546	out.writeObject(entry);
100			}
101
102			out.close();
103	torben	1545	}
104
105
106
107			@Override
108			public void purgeOldEntries() {
109			}
110
111	torben	1553	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	torben	1545
124			@Override
125			public StationBean lookupStationsByLocation(Location location) {
126
127	torben	1559	statsByLocation(location);
128
129	torben	1553	long start = System.currentTimeMillis();
130	torben	1545	Location tmpLoc = new Location("GPS");
131
132	torben	1553	LinkedList<StationEntry> entries = new LinkedList<StationEntry>() ;
133	torben	1545
134			for (StationEntry entry : stations.entries) {
135			tmpLoc.setLatitude(entry.getLatitude());
136			tmpLoc.setLongitude(entry.getLongitude());
137
138	torben	1553	int distance = (int) location.distanceTo(tmpLoc);
139	torben	1545
140	torben	1553	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	torben	1545	}
151
152	torben	1553	logElapsedTime(start, "location_stage1");
153	torben	1545
154	torben	1553	Collections.sort( entries, distanceComparator);
155	torben	1545
156			StationBean tmpStations = new StationBean();
157			for (int i = 0; i<8; i++) {
158			tmpStations.entries.add( entries.get(i) );
159			}
160
161	torben	1553	logElapsedTime(start, "location");
162	torben	1545	return tmpStations;
163			}
164	torben	1553
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	torben	1545
171			@Override
172			public StationBean lookupStationsByName(String name) {
173
174	torben	1553	long start = System.currentTimeMillis();
175
176	torben	1545	name = name.toLowerCase();
177			StationBean tmpStations = new StationBean();
178			for (StationEntry entry : stations.entries) {
179	torben	1553	if (entry.nameLower.startsWith(name) \|\| entry.nameInternational.startsWith(name) ) {
180	torben	1545	tmpStations.entries.add(entry);
181			}
182			}
183	torben	1553	logElapsedTime(start, "name");
184	torben	1545	return tmpStations;
185			}
186
187			@Override
188			public StationBean lookupStationsByIds(String ids) {
189	torben	1559	statsByIds(ids);
190
191	torben	1545	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	torben	1559
204	torben	1545
205	torben	1559	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	torben	1545	}