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