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.ArrayList;
import java.util.Collections;
import java.util.Comparator;

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 {
                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;
                        while ( (o=in.readObject()) != null ) {
                                stations.entries.add( (StationEntry) o);
                        }
                        in.close();
                } catch (EOFException e) {
                        //do nothing;
                }
                
                Log.e("OFFLINE", "loaded" + stations.entries.size());
                
                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) {
                        out.writeObject(entry);
                }
                
                out.close();            
        }
        
        
        @Override
        public void purgeOldEntries() {
        }

        
        @Override
        public StationBean lookupStationsByLocation(Location location) {
                
                Location tmpLoc = new Location("GPS");
                
                ArrayList<StationEntry> entries = new ArrayList<StationEntry>() ;
                
                for (StationEntry entry : stations.entries) {
                        tmpLoc.setLatitude(entry.getLatitude());
                        tmpLoc.setLongitude(entry.getLongitude());
                        
                        entry.setCalcdist( (int) location.distanceTo(tmpLoc) ); 
                        entries.add(entry);
                        
                }
                
                Collections.sort( entries, 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;
                        }
                        
                });
                
                
                StationBean tmpStations = new StationBean();
                for (int i = 0; i<8; i++) {
                        tmpStations.entries.add( entries.get(i) );
                }
                
                return tmpStations;
        }

        @Override
        public StationBean lookupStationsByName(String name) {
                
                name = name.toLowerCase();
                StationBean tmpStations = new StationBean();
                for (StationEntry entry : stations.entries) {
                        if (entry.getName().toLowerCase().startsWith(name) ) {
                                tmpStations.entries.add(entry);
                        }
                }
                                                
                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.ArrayList;
10			import java.util.Collections;
11			import java.util.Comparator;
12
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	1546	stations.entries.clear(); //TODO: remove
32
33	torben	1545	File parent = context.getFilesDir();
34	torben	1546	File stationsFile = new File(parent, "stations.bin");
35	torben	1545
36			if (!stationsFile.exists())
37			return false;
38
39			int size = (int) stationsFile.length();
40	torben	1546	/*byte data[] = new byte[size];
41	torben	1545
42			RandomAccessFile raf = new RandomAccessFile(stationsFile, "r");
43			raf.readFully(data);
44
45			Serializer serializer = new Persister();
46	torben	1546	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );*/
47	torben	1545
48	torben	1546
49			try {
50			ObjectInputStream in = new ObjectInputStream( new FileInputStream(stationsFile) );
51			Object o;
52			while ( (o=in.readObject()) != null ) {
53			stations.entries.add( (StationEntry) o);
54			}
55			in.close();
56			} catch (EOFException e) {
57			//do nothing;
58			}
59
60	torben	1545	Log.e("OFFLINE", "loaded" + stations.entries.size());
61
62			return true;
63			}
64
65	torben	1546	public void downloadStations(Context context) throws Exception {
66	torben	1545	File parent = context.getFilesDir();
67	torben	1546	File stationsFile = new File(parent, "stations.bin");
68	torben	1545
69			byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
70	torben	1546	Serializer serializer = new Persister();
71			stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );
72	torben	1545
73	torben	1546
74			ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
75	torben	1545	Log.e("OFFLINE", "data size" + data.length);
76	torben	1546
77			for (StationEntry entry : stations.entries) {
78			out.writeObject(entry);
79			}
80
81			out.close();
82	torben	1545	}
83
84
85
86			@Override
87			public void purgeOldEntries() {
88			}
89
90
91			@Override
92			public StationBean lookupStationsByLocation(Location location) {
93
94			Location tmpLoc = new Location("GPS");
95
96			ArrayList<StationEntry> entries = new ArrayList<StationEntry>() ;
97
98			for (StationEntry entry : stations.entries) {
99			tmpLoc.setLatitude(entry.getLatitude());
100			tmpLoc.setLongitude(entry.getLongitude());
101
102			entry.setCalcdist( (int) location.distanceTo(tmpLoc) );
103			entries.add(entry);
104
105			}
106
107			Collections.sort( entries, new Comparator<StationEntry>() {
108			@Override
109			public int compare(StationEntry object1, StationEntry object2) {
110			if (object1.getCalcdist() == object2.getCalcdist())
111			return 0;
112
113			if (object1.getCalcdist() > object2.getCalcdist())
114			return 1;
115			else
116			return -1;
117			}
118
119			});
120
121
122
123			StationBean tmpStations = new StationBean();
124			for (int i = 0; i<8; i++) {
125			tmpStations.entries.add( entries.get(i) );
126			}
127
128			return tmpStations;
129			}
130
131			@Override
132			public StationBean lookupStationsByName(String name) {
133
134			name = name.toLowerCase();
135			StationBean tmpStations = new StationBean();
136			for (StationEntry entry : stations.entries) {
137			if (entry.getName().toLowerCase().startsWith(name) ) {
138			tmpStations.entries.add(entry);
139			}
140			}
141
142			return tmpStations;
143			}
144
145			@Override
146			public StationBean lookupStationsByIds(String ids) {
147			IntSet idset = new IntSet();
148			idset.fromString(ids);
149
150			StationBean tmpStations = new StationBean();
151			for (StationEntry entry : stations.entries) {
152			if (idset.contains( entry.getId() ) ) {
153			tmpStations.entries.add(entry);
154			}
155			}
156
157
158
159			return tmpStations;
160			}
161
162			}