Home | History | Annotate | Download | only in gatt 
      1 /*
      2  * Copyright (C) 2013 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 package com.android.bluetooth.gatt;
     17 
     18 import java.util.ArrayList;
     19 import java.util.List;
     20 import java.util.UUID;
     21 
     22 class ServiceDeclaration {
     23     private static final boolean DBG = GattServiceConfig.DBG;
     24     private static final String TAG = GattServiceConfig.TAG_PREFIX + "ServiceDeclaration";
     25 
     26     public static final byte TYPE_UNDEFINED = 0;
     27     public static final byte TYPE_SERVICE = 1;
     28     public static final byte TYPE_CHARACTERISTIC = 2;
     29     public static final byte TYPE_DESCRIPTOR = 3;
     30     public static final byte TYPE_INCLUDED_SERVICE = 4;
     31 
     32     class Entry {
     33         byte type = TYPE_UNDEFINED;
     34         UUID uuid = null;
     35         int instance = 0;
     36         int permissions = 0;
     37         int properties = 0;
     38         int serviceType = 0;
     39         int serviceHandle = 0;
     40         boolean advertisePreferred = false;
     41 
     42         Entry(UUID uuid, int serviceType, int instance) {
     43             this.type = TYPE_SERVICE;
     44             this.uuid = uuid;
     45             this.instance = instance;
     46             this.serviceType = serviceType;
     47         }
     48 
     49         Entry(UUID uuid, int serviceType, int instance, boolean advertisePreferred) {
     50             this.type = TYPE_SERVICE;
     51             this.uuid = uuid;
     52             this.instance = instance;
     53             this.serviceType = serviceType;
     54             this.advertisePreferred = advertisePreferred;
     55         }
     56 
     57         Entry(UUID uuid, int properties, int permissions, int instance) {
     58             this.type = TYPE_CHARACTERISTIC;
     59             this.uuid = uuid;
     60             this.instance = instance;
     61             this.permissions = permissions;
     62             this.properties = properties;
     63         }
     64 
     65         Entry(UUID uuid, int permissions) {
     66             this.type = TYPE_DESCRIPTOR;
     67             this.uuid = uuid;
     68             this.permissions = permissions;
     69         }
     70     }
     71 
     72     // guards access to mEntries and mNumHandles in order to make this class thread-safe
     73     private final Object mLock = new Object();
     74     private final List<Entry> mEntries = new ArrayList<>();
     75     private int mNumHandles = 0;
     76 
     77     void addService(UUID uuid, int serviceType, int instance, int minHandles,
     78             boolean advertisePreferred) {
     79         synchronized (mLock) {
     80             mEntries.add(new Entry(uuid, serviceType, instance, advertisePreferred));
     81             if (minHandles == 0) {
     82                 ++mNumHandles;
     83             } else {
     84                 mNumHandles = minHandles;
     85             }
     86         }
     87     }
     88 
     89     void addIncludedService(UUID uuid, int serviceType, int instance) {
     90         Entry entry = new Entry(uuid, serviceType, instance);
     91         entry.type = TYPE_INCLUDED_SERVICE;
     92         synchronized (mLock) {
     93             mEntries.add(entry);
     94             ++mNumHandles;
     95         }
     96     }
     97 
     98     void addCharacteristic(UUID uuid, int properties, int permissions) {
     99         synchronized (mLock) {
    100             mEntries.add(new Entry(uuid, properties, permissions, 0 /*instance*/));
    101             mNumHandles += 2;
    102         }
    103     }
    104 
    105     void addDescriptor(UUID uuid, int permissions) {
    106         synchronized (mLock) {
    107             mEntries.add(new Entry(uuid, permissions));
    108             ++mNumHandles;
    109         }
    110     }
    111 
    112     Entry getNext() {
    113         synchronized (mLock) {
    114             if (mEntries.isEmpty()) return null;
    115             Entry entry = mEntries.get(0);
    116             mEntries.remove(0);
    117             return entry;
    118         }
    119     }
    120 
    121     boolean isServiceAdvertisePreferred(UUID uuid) {
    122         synchronized (mLock) {
    123             for (Entry entry : mEntries) {
    124                 if (entry.uuid.equals(uuid)) {
    125                     return entry.advertisePreferred;
    126                 }
    127             }
    128             return false;
    129         }
    130     }
    131 
    132     int getNumHandles() {
    133         synchronized (mLock) {
    134             return mNumHandles;
    135         }
    136     }
    137 }
    138