1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.server;
18
19import android.os.ParcelUuid;
20import android.util.Log;
21
22import java.util.HashMap;
23import java.util.Map;
24import java.util.Set;
25
26class BluetoothDeviceProperties {
27
28    private static final String TAG = "BluetoothDeviceProperties";
29
30    private final HashMap<String, Map<String, String>> mPropertiesMap;
31    private final BluetoothService mService;
32
33    BluetoothDeviceProperties(BluetoothService service) {
34        mPropertiesMap = new HashMap<String, Map<String, String>>();
35        mService = service;
36    }
37
38    Map<String, String> addProperties(String address, String[] properties) {
39        /*
40         * We get a DeviceFound signal every time RSSI changes or name changes.
41         * Don't create a new Map object every time.
42         */
43        Map<String, String> propertyValues;
44        synchronized(mPropertiesMap) {
45            propertyValues = mPropertiesMap.get(address);
46            if (propertyValues == null) {
47                propertyValues = new HashMap<String, String>();
48            }
49
50            for (int i = 0; i < properties.length; i++) {
51                String name = properties[i];
52                String newValue = null;
53                int len;
54                if (name == null) {
55                    Log.e(TAG, "Error: Remote Device Property at index "
56                        + i + " is null");
57                    continue;
58                }
59                if (name.equals("UUIDs") || name.equals("Nodes")) {
60                    StringBuilder str = new StringBuilder();
61                    len = Integer.valueOf(properties[++i]);
62                    for (int j = 0; j < len; j++) {
63                        str.append(properties[++i]);
64                        str.append(",");
65                    }
66                    if (len > 0) {
67                        newValue = str.toString();
68                    }
69                } else {
70                    newValue = properties[++i];
71                }
72
73                propertyValues.put(name, newValue);
74            }
75            mPropertiesMap.put(address, propertyValues);
76        }
77
78        // We have added a new remote device or updated its properties.
79        // Also update the serviceChannel cache.
80        mService.updateDeviceServiceChannelCache(address);
81        return propertyValues;
82    }
83
84    void setProperty(String address, String name, String value) {
85        synchronized(mPropertiesMap) {
86            Map <String, String> propVal = mPropertiesMap.get(address);
87            if (propVal != null) {
88                propVal.put(name, value);
89                mPropertiesMap.put(address, propVal);
90            } else {
91                Log.e(TAG, "setRemoteDeviceProperty for a device not in cache:" + address);
92            }
93        }
94    }
95
96    boolean isInCache(String address) {
97        synchronized (mPropertiesMap) {
98            return (mPropertiesMap.get(address) != null);
99        }
100    }
101
102    boolean isEmpty() {
103        synchronized (mPropertiesMap) {
104            return mPropertiesMap.isEmpty();
105        }
106    }
107
108    Set<String> keySet() {
109        synchronized (mPropertiesMap) {
110            return mPropertiesMap.keySet();
111        }
112    }
113
114    String getProperty(String address, String property) {
115        synchronized(mPropertiesMap) {
116            Map<String, String> properties = mPropertiesMap.get(address);
117            if (properties != null) {
118                return properties.get(property);
119            } else {
120                // Query for remote device properties, again.
121                // We will need to reload the cache when we switch Bluetooth on / off
122                // or if we crash.
123                properties = updateCache(address);
124                if (properties != null) {
125                    return properties.get(property);
126                }
127            }
128        }
129        Log.e(TAG, "getRemoteDeviceProperty: " + property + " not present: " + address);
130        return null;
131    }
132
133    Map<String, String> updateCache(String address) {
134        String[] propValues = mService.getRemoteDeviceProperties(address);
135        if (propValues != null) {
136            return addProperties(address, propValues);
137        }
138        return null;
139    }
140}
141