traininfo/provider/OfflineStationProvider.java

package dk.thoerup.traininfo.provider;

import java.io.EOFException;
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 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") );*/
                
                
                try {
                        ObjectInputStream in = new ObjectInputStream( new FileInputStream(stationsFile) );
                        Object o;
                        StationEntry e = null;
                        while ( (o=in.readObject()) != null ) {
                                e = (StationEntry) o;
                                e.updateSearch();
                                stations.entries.add( e );
                        }
                        in.close();
                } catch (EOFException e) {
                        //do nothing;
                }
                
                Log.e("OFFLINE", "loaded" + stations.entries.size());
                logElapsedTime(start, "loadStations");
                
                return true;
        }       
        
        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);
                
                for (StationEntry entry : stations.entries) {
                        entry.updateSearch(); //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	torben	1546	import java.io.EOFException;
4	torben	1545	import java.io.File;
5	torben	1546	import java.io.FileInputStream;
6			import java.io.FileOutputStream;
7	torben	1559	import java.io.IOException;
8	torben	1546	import java.io.ObjectInputStream;
9			import java.io.ObjectOutputStream;
10	torben	1559	import java.net.URLEncoder;
11	torben	1545	import java.util.Collections;
12			import java.util.Comparator;
13	torben	1553	import java.util.LinkedList;
14	torben	1545
15			import org.simpleframework.xml.Serializer;
16			import org.simpleframework.xml.core.Persister;
17
18			import android.content.Context;
19			import android.location.Location;
20			import android.util.Log;
21			import dk.thoerup.android.traininfo.common.StationBean;
22			import dk.thoerup.android.traininfo.common.StationEntry;
23			import dk.thoerup.genericjavautils.HttpUtil;
24	torben	1559	import dk.thoerup.traininfo.util.DownloadUtil;
25	torben	1545	import dk.thoerup.traininfo.util.IntSet;
26			import dk.thoerup.traininfo.util.XmlUtil;
27
28			public class OfflineStationProvider implements StationProvider {
29
30			StationBean stations = new StationBean();
31
32
33			public boolean loadStations(Context context) throws Exception {
34	torben	1553	long start = System.currentTimeMillis();
35
36	torben	1546	stations.entries.clear(); //TODO: remove
37
38	torben	1545	File parent = context.getFilesDir();
39	torben	1546	File stationsFile = new File(parent, "stations.bin");
40	torben	1545
41			if (!stationsFile.exists())
42			return false;
43
44	torben	1551	/*int size = (int) stationsFile.length();
45			byte data[] = new byte[size];
46	torben	1545
47			RandomAccessFile raf = new RandomAccessFile(stationsFile, "r");
48			raf.readFully(data);
49
50			Serializer serializer = new Persister();
51	torben	1546	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );*/
52	torben	1545
53	torben	1546
54			try {
55			ObjectInputStream in = new ObjectInputStream( new FileInputStream(stationsFile) );
56			Object o;
57	torben	1553	StationEntry e = null;
58	torben	1546	while ( (o=in.readObject()) != null ) {
59	torben	1553	e = (StationEntry) o;
60			e.updateSearch();
61			stations.entries.add( e );
62	torben	1546	}
63			in.close();
64			} catch (EOFException e) {
65			//do nothing;
66			}
67
68	torben	1545	Log.e("OFFLINE", "loaded" + stations.entries.size());
69	torben	1553	logElapsedTime(start, "loadStations");
70	torben	1545
71			return true;
72			}
73
74	torben	1546	public void downloadStations(Context context) throws Exception {
75	torben	1545	File parent = context.getFilesDir();
76	torben	1546	File stationsFile = new File(parent, "stations.bin");
77	torben	1545
78	torben	1547
79	torben	1545	byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
80	torben	1546	Serializer serializer = new Persister();
81			stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );
82	torben	1545
83	torben	1546
84			ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
85	torben	1545	Log.e("OFFLINE", "data size" + data.length);
86	torben	1546
87			for (StationEntry entry : stations.entries) {
88	torben	1556	entry.updateSearch(); //prepare name fields for byName search
89	torben	1546	out.writeObject(entry);
90			}
91
92			out.close();
93	torben	1545	}
94
95
96
97			@Override
98			public void purgeOldEntries() {
99			}
100
101	torben	1553	Comparator<StationEntry> distanceComparator = new Comparator<StationEntry>() {
102			@Override
103			public int compare(StationEntry object1, StationEntry object2) {
104			if (object1.getCalcdist() == object2.getCalcdist())
105			return 0;
106
107			if (object1.getCalcdist() > object2.getCalcdist())
108			return 1;
109			else
110			return -1;
111			}
112			};
113	torben	1545
114			@Override
115			public StationBean lookupStationsByLocation(Location location) {
116
117	torben	1559	statsByLocation(location);
118
119	torben	1553	long start = System.currentTimeMillis();
120	torben	1545	Location tmpLoc = new Location("GPS");
121
122	torben	1553	LinkedList<StationEntry> entries = new LinkedList<StationEntry>() ;
123	torben	1545
124			for (StationEntry entry : stations.entries) {
125			tmpLoc.setLatitude(entry.getLatitude());
126			tmpLoc.setLongitude(entry.getLongitude());
127
128	torben	1553	int distance = (int) location.distanceTo(tmpLoc);
129	torben	1545
130	torben	1553	if (entries.size() <8 \|\| entries.getLast().getCalcdist() > distance) {
131			entry.setCalcdist(distance);
132
133			if (entries.size() == 8)
134			entries.removeLast();
135
136			entries.addLast(entry);
137
138			Collections.sort( entries, distanceComparator);
139			}
140	torben	1545	}
141
142	torben	1553	logElapsedTime(start, "location_stage1");
143	torben	1545
144	torben	1553	Collections.sort( entries, distanceComparator);
145	torben	1545
146			StationBean tmpStations = new StationBean();
147			for (int i = 0; i<8; i++) {
148			tmpStations.entries.add( entries.get(i) );
149			}
150
151	torben	1553	logElapsedTime(start, "location");
152	torben	1545	return tmpStations;
153			}
154	torben	1553
155			private void logElapsedTime(long start, String method) {
156			long now = System.currentTimeMillis();
157
158			Log.i("TrainInfo", "Search by " + method + " elapsed " + (now-start) );
159			}
160	torben	1545
161			@Override
162			public StationBean lookupStationsByName(String name) {
163
164	torben	1553	long start = System.currentTimeMillis();
165
166	torben	1545	name = name.toLowerCase();
167			StationBean tmpStations = new StationBean();
168			for (StationEntry entry : stations.entries) {
169	torben	1553	if (entry.nameLower.startsWith(name) \|\| entry.nameInternational.startsWith(name) ) {
170	torben	1545	tmpStations.entries.add(entry);
171			}
172			}
173	torben	1553	logElapsedTime(start, "name");
174	torben	1545	return tmpStations;
175			}
176
177			@Override
178			public StationBean lookupStationsByIds(String ids) {
179	torben	1559	statsByIds(ids);
180
181	torben	1545	IntSet idset = new IntSet();
182			idset.fromString(ids);
183
184			StationBean tmpStations = new StationBean();
185			for (StationEntry entry : stations.entries) {
186			if (idset.contains( entry.getId() ) ) {
187			tmpStations.entries.add(entry);
188			}
189			}
190
191			return tmpStations;
192			}
193	torben	1559
194	torben	1545
195	torben	1559	private void statsByLocation(Location location) {
196			double lat = XmlStationProvider.roundToPlaces(location.getLatitude(), 4);
197			double lng = XmlStationProvider.roundToPlaces(location.getLongitude(), 4);
198
199			final String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + lat + "&longitude=" + lng + "&dummy=1";
200			Log.i("url", url);
201			urlSender(url);
202			}
203
204			private void statsByName(String name) {
205
206			try {
207			name = URLEncoder.encode(name, "ISO8859-1");
208			} catch (Exception e) {
209			Log.e("lookupStations", "Encoding failed", e);//if encoding fails use original and hope for the best
210			}
211
212			String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + name + "&dummy=1";
213			Log.i("url", url);
214			urlSender(url);
215			}
216
217			private void statsByIds(String ids) {
218			final String url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids + "&dummy=1";
219			Log.i("url", url);
220			urlSender(url);
221			}
222
223			private void urlSender(final String url) {
224			Thread t = new Thread(new Runnable() {
225
226			@Override
227			public void run() {
228			try {
229			DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
230			} catch (IOException e) {
231			Log.e("TrainInfo", "stats failed");
232			}
233			}
234			});
235			t.start();
236			}
237
238
239	torben	1545	}