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	package dk.thoerup.traininfo.provider;
2
3	import java.io.EOFException;
4	import java.io.File;
5	import java.io.FileInputStream;
6	import java.io.FileOutputStream;
7	import java.io.ObjectInputStream;
8	import java.io.ObjectOutputStream;
9	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	stations.entries.clear(); //TODO: remove
32
33	File parent = context.getFilesDir();
34	File stationsFile = new File(parent, "stations.bin");
35
36	if (!stationsFile.exists())
37	return false;
38
39	int size = (int) stationsFile.length();
40	/*byte data[] = new byte[size];
41
42	RandomAccessFile raf = new RandomAccessFile(stationsFile, "r");
43	raf.readFully(data);
44
45	Serializer serializer = new Persister();
46	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );*/
47
48
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	Log.e("OFFLINE", "loaded" + stations.entries.size());
61
62	return true;
63	}
64
65	public void downloadStations(Context context) throws Exception {
66	File parent = context.getFilesDir();
67	File stationsFile = new File(parent, "stations.bin");
68
69	byte data[] = HttpUtil.getContent(XmlUtil.SERVICE_BASE + "/LocateStations?dump=1", 5000);
70	Serializer serializer = new Persister();
71	stations = serializer.read(StationBean.class, new String(data, "ISO-8859-1") );
72
73
74	ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(stationsFile) );
75	Log.e("OFFLINE", "data size" + data.length);
76
77	for (StationEntry entry : stations.entries) {
78	out.writeObject(entry);
79	}
80
81	out.close();
82	}
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	}