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.ObjectInputStream;
import java.io.ObjectOutputStream;
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.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) {
                
                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) {
                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;
        }

}
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			import java.io.ObjectInputStream;
8			import java.io.ObjectOutputStream;
9	torben	1545	import java.util.Collections;
10			import java.util.Comparator;
11	torben	1553	import java.util.LinkedList;
12	torben	1545
13			import org.simpleframework.xml.Serializer;
14			import org.simpleframework.xml.core.Persister;
15
16			import android.content.Context;
17			import android.location.Location;
18			import android.util.Log;
19			import dk.thoerup.android.traininfo.common.StationBean;
20			import dk.thoerup.android.traininfo.common.StationEntry;
21			import dk.thoerup.genericjavautils.HttpUtil;
22			import dk.thoerup.traininfo.util.IntSet;
23			import dk.thoerup.traininfo.util.XmlUtil;
24
25			public class OfflineStationProvider implements StationProvider {
26
27			StationBean stations = new StationBean();
28
29
30			public boolean loadStations(Context context) throws Exception {
31	torben	1553	long start = System.currentTimeMillis();
32
33	torben	1546	stations.entries.clear(); //TODO: remove
34
35	torben	1545	File parent = context.getFilesDir();
36	torben	1546	File stationsFile = new File(parent, "stations.bin");
37	torben	1545
38			if (!stationsFile.exists())
39			return false;
40
41	torben	1551	/*int size = (int) stationsFile.length();
42			byte data[] = new byte[size];
43	torben	1545
44			RandomAccessFile raf = new RandomAccessFile(stationsFile, "r");
45			raf.readFully(data);
46
47			Serializer serializer = new Persister();
48	torben	1546	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );*/
49	torben	1545
50	torben	1546
51			try {
52			ObjectInputStream in = new ObjectInputStream( new FileInputStream(stationsFile) );
53			Object o;
54	torben	1553	StationEntry e = null;
55	torben	1546	while ( (o=in.readObject()) != null ) {
56	torben	1553	e = (StationEntry) o;
57			e.updateSearch();
58			stations.entries.add( e );
59	torben	1546	}
60			in.close();
61			} catch (EOFException e) {
62			//do nothing;
63			}
64
65	torben	1545	Log.e("OFFLINE", "loaded" + stations.entries.size());
66	torben	1553	logElapsedTime(start, "loadStations");
67	torben	1545
68			return true;
69			}
70
71	torben	1546	public void downloadStations(Context context) throws Exception {
72	torben	1545	File parent = context.getFilesDir();
73	torben	1546	File stationsFile = new File(parent, "stations.bin");
74	torben	1545
75	torben	1547
76	torben	1545	byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
77	torben	1546	Serializer serializer = new Persister();
78			stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );
79	torben	1545
80	torben	1546
81			ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
82	torben	1545	Log.e("OFFLINE", "data size" + data.length);
83	torben	1546
84			for (StationEntry entry : stations.entries) {
85	torben	1556	entry.updateSearch(); //prepare name fields for byName search
86	torben	1546	out.writeObject(entry);
87			}
88
89			out.close();
90	torben	1545	}
91
92
93
94			@Override
95			public void purgeOldEntries() {
96			}
97
98	torben	1553	Comparator<StationEntry> distanceComparator = new Comparator<StationEntry>() {
99			@Override
100			public int compare(StationEntry object1, StationEntry object2) {
101			if (object1.getCalcdist() == object2.getCalcdist())
102			return 0;
103
104			if (object1.getCalcdist() > object2.getCalcdist())
105			return 1;
106			else
107			return -1;
108			}
109			};
110	torben	1545
111			@Override
112			public StationBean lookupStationsByLocation(Location location) {
113
114	torben	1553	long start = System.currentTimeMillis();
115	torben	1545	Location tmpLoc = new Location("GPS");
116
117	torben	1553	LinkedList<StationEntry> entries = new LinkedList<StationEntry>() ;
118	torben	1545
119			for (StationEntry entry : stations.entries) {
120			tmpLoc.setLatitude(entry.getLatitude());
121			tmpLoc.setLongitude(entry.getLongitude());
122
123	torben	1553	int distance = (int) location.distanceTo(tmpLoc);
124	torben	1545
125	torben	1553	if (entries.size() <8 \|\| entries.getLast().getCalcdist() > distance) {
126			entry.setCalcdist(distance);
127
128			if (entries.size() == 8)
129			entries.removeLast();
130
131			entries.addLast(entry);
132
133			Collections.sort( entries, distanceComparator);
134			}
135	torben	1545	}
136
137	torben	1553	logElapsedTime(start, "location_stage1");
138	torben	1545
139	torben	1553	Collections.sort( entries, distanceComparator);
140	torben	1545
141			StationBean tmpStations = new StationBean();
142			for (int i = 0; i<8; i++) {
143			tmpStations.entries.add( entries.get(i) );
144			}
145
146	torben	1553	logElapsedTime(start, "location");
147	torben	1545	return tmpStations;
148			}
149	torben	1553
150			private void logElapsedTime(long start, String method) {
151			long now = System.currentTimeMillis();
152
153			Log.i("TrainInfo", "Search by " + method + " elapsed " + (now-start) );
154			}
155	torben	1545
156			@Override
157			public StationBean lookupStationsByName(String name) {
158
159	torben	1553	long start = System.currentTimeMillis();
160
161	torben	1545	name = name.toLowerCase();
162			StationBean tmpStations = new StationBean();
163			for (StationEntry entry : stations.entries) {
164	torben	1553	if (entry.nameLower.startsWith(name) \|\| entry.nameInternational.startsWith(name) ) {
165	torben	1545	tmpStations.entries.add(entry);
166			}
167			}
168	torben	1553	logElapsedTime(start, "name");
169	torben	1545	return tmpStations;
170			}
171
172			@Override
173			public StationBean lookupStationsByIds(String ids) {
174			IntSet idset = new IntSet();
175			idset.fromString(ids);
176
177			StationBean tmpStations = new StationBean();
178			for (StationEntry entry : stations.entries) {
179			if (idset.contains( entry.getId() ) ) {
180			tmpStations.entries.add(entry);
181			}
182			}
183
184			return tmpStations;
185			}
186
187			}