1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163

/**
 *  BlueCove - Java library for Bluetooth
 *  Copyright (C) 2006-2009 Vlad Skarzhevskyy
 * 
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 *
 *  @author vlads
 *  @version $Id$
 */
package org.bluecove.tester.me.rms;

import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Vector;

import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreException;

import org.bluecove.tester.log.Logger;
import org.bluecove.tester.util.IOUtils;

public abstract class RmsDataStorage {

    /**
     * 
     * @param recordStoreName
     * @param list
     *            can be null, then load only one first Item
     * @param instance
     * @return true in case of success
     */
    public static boolean load(String recordStoreName, Vector list, RmsStorable instance) {
        RecordStore recordStore = null;
        try {
            // RecordStore.deleteRecordStore(name);
            recordStore = RecordStore.openRecordStore(recordStoreName, false);
        } catch (RecordStoreException e) {
            return false;
        }
        try {
            RecordEnumeration re = recordStore.enumerateRecords(null, null, true);

            while (re.hasNextElement()) {
                int id = re.nextRecordId();
                ByteArrayInputStream bais = new ByteArrayInputStream(recordStore.getRecord(id));
                DataInputStream inputStream = new DataInputStream(bais);
                try {
                    if (list == null) {
                        instance.setRmsId(id);
                        instance.readExternal(inputStream);
                        break;
                    } else {
                        RmsStorable item = instance.newInstance(id);
                        item.readExternal(inputStream);
                        list.addElement(item);
                    }
                } catch (IOException e) {
                    Logger.error("RMS decode", e);
                    return false;
                }
            }
        } catch (RecordStoreException e) {
            Logger.error("RMS read", e);
            return false;
        } finally {
            closeQuietly(recordStore);
        }
        return true;
    }

    public static void deleteRecordStore(String recordStoreName) {
        try {
            RecordStore.deleteRecordStore(recordStoreName);
        } catch (Exception rse) {
        }
    }

    public static boolean saveAll(String recordStoreName, Vector list) {
        // Delete any previous record store with same name.
        // Silently ignore failure.
        try {
            RecordStore.deleteRecordStore(recordStoreName);
        } catch (Exception rse) {
        }

        RecordStore recordStore = null;
        // Create new RMS store. If we fail, return false.
        try {
            recordStore = RecordStore.openRecordStore(recordStoreName, true);
        } catch (RecordStoreException rse) {
            return false;
        }
        try {
            for (Enumeration en = list.elements(); en.hasMoreElements();) {
                try {
                    RmsStorable item = (RmsStorable) en.nextElement();
                    byte[] b = IOUtils.writeByteArray(item);
                    item.setRmsId(recordStore.addRecord(b, 0, b.length));
                } catch (Throwable e) {
                    Logger.error("RMS write", e);
                    return false;
                }
            }
        } finally {
            closeQuietly(recordStore);
        }
        return true;
    }

    public static boolean update(String recordStoreName, RmsStorable item) {
        RecordStore recordStore = null;
        // Create new RMS store. If we fail, return false.
        try {
            recordStore = RecordStore.openRecordStore(recordStoreName, true);
        } catch (RecordStoreException rse) {
            return false;
        }

        try {
            byte[] b = IOUtils.writeByteArray(item);
            if (item.getRmsId() == -1) {
                item.setRmsId(recordStore.addRecord(b, 0, b.length));
            } else {
                recordStore.setRecord(item.getRmsId(), b, 0, b.length);
            }
            return true;
        } catch (Throwable e) {
            Logger.error("RMS write", e);
            return false;
        } finally {
            closeQuietly(recordStore);
        }

    }

    public static void closeQuietly(RecordStore recordStore) {
        try {
            if (recordStore != null) {
                recordStore.closeRecordStore();
            }
        } catch (RecordStoreException ignore) {
            // ignore
        }
    }
}