1/*
2 * Copyright (C) 2009 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.os.storage;
18
19import android.os.Binder;
20import android.os.IBinder;
21import android.os.IInterface;
22import android.os.Parcel;
23import android.os.RemoteException;
24
25/**
26 * Callback class for receiving events from MountService.
27 *
28 * @hide - Applications should use IStorageEventListener for storage event
29 *       callbacks.
30 */
31public interface IMountServiceListener extends IInterface {
32    /** Local-side IPC implementation stub class. */
33    public static abstract class Stub extends Binder implements IMountServiceListener {
34        private static final String DESCRIPTOR = "IMountServiceListener";
35
36        /** Construct the stub at attach it to the interface. */
37        public Stub() {
38            this.attachInterface(this, DESCRIPTOR);
39        }
40
41        /**
42         * Cast an IBinder object into an IMountServiceListener interface,
43         * generating a proxy if needed.
44         */
45        public static IMountServiceListener asInterface(IBinder obj) {
46            if ((obj == null)) {
47                return null;
48            }
49            IInterface iin = (IInterface) obj.queryLocalInterface(DESCRIPTOR);
50            if (((iin != null) && (iin instanceof IMountServiceListener))) {
51                return ((IMountServiceListener) iin);
52            }
53            return new IMountServiceListener.Stub.Proxy(obj);
54        }
55
56        public IBinder asBinder() {
57            return this;
58        }
59
60        @Override
61        public boolean onTransact(int code, Parcel data, Parcel reply, int flags)
62                throws RemoteException {
63            switch (code) {
64                case INTERFACE_TRANSACTION: {
65                    reply.writeString(DESCRIPTOR);
66                    return true;
67                }
68                case TRANSACTION_onUsbMassStorageConnectionChanged: {
69                    data.enforceInterface(DESCRIPTOR);
70                    boolean connected;
71                    connected = (0 != data.readInt());
72                    this.onUsbMassStorageConnectionChanged(connected);
73                    reply.writeNoException();
74                    return true;
75                }
76                case TRANSACTION_onStorageStateChanged: {
77                    data.enforceInterface(DESCRIPTOR);
78                    String path;
79                    path = data.readString();
80                    String oldState;
81                    oldState = data.readString();
82                    String newState;
83                    newState = data.readString();
84                    this.onStorageStateChanged(path, oldState, newState);
85                    reply.writeNoException();
86                    return true;
87                }
88            }
89            return super.onTransact(code, data, reply, flags);
90        }
91
92        private static class Proxy implements IMountServiceListener {
93            private IBinder mRemote;
94
95            Proxy(IBinder remote) {
96                mRemote = remote;
97            }
98
99            public IBinder asBinder() {
100                return mRemote;
101            }
102
103            public String getInterfaceDescriptor() {
104                return DESCRIPTOR;
105            }
106
107            /**
108             * Detection state of USB Mass Storage has changed
109             *
110             * @param available true if a UMS host is connected.
111             */
112            public void onUsbMassStorageConnectionChanged(boolean connected) throws RemoteException {
113                Parcel _data = Parcel.obtain();
114                Parcel _reply = Parcel.obtain();
115                try {
116                    _data.writeInterfaceToken(DESCRIPTOR);
117                    _data.writeInt(((connected) ? (1) : (0)));
118                    mRemote.transact(Stub.TRANSACTION_onUsbMassStorageConnectionChanged, _data,
119                            _reply, 0);
120                    _reply.readException();
121                } finally {
122                    _reply.recycle();
123                    _data.recycle();
124                }
125            }
126
127            /**
128             * Storage state has changed.
129             *
130             * @param path The volume mount path.
131             * @param oldState The old state of the volume.
132             * @param newState The new state of the volume. Note: State is one
133             *            of the values returned by
134             *            Environment.getExternalStorageState()
135             */
136            public void onStorageStateChanged(String path, String oldState, String newState)
137                    throws RemoteException {
138                Parcel _data = Parcel.obtain();
139                Parcel _reply = Parcel.obtain();
140                try {
141                    _data.writeInterfaceToken(DESCRIPTOR);
142                    _data.writeString(path);
143                    _data.writeString(oldState);
144                    _data.writeString(newState);
145                    mRemote.transact(Stub.TRANSACTION_onStorageStateChanged, _data, _reply, 0);
146                    _reply.readException();
147                } finally {
148                    _reply.recycle();
149                    _data.recycle();
150                }
151            }
152        }
153
154        static final int TRANSACTION_onUsbMassStorageConnectionChanged = (IBinder.FIRST_CALL_TRANSACTION + 0);
155
156        static final int TRANSACTION_onStorageStateChanged = (IBinder.FIRST_CALL_TRANSACTION + 1);
157    }
158
159    /**
160     * Detection state of USB Mass Storage has changed
161     *
162     * @param available true if a UMS host is connected.
163     */
164    public void onUsbMassStorageConnectionChanged(boolean connected) throws RemoteException;
165
166    /**
167     * Storage state has changed.
168     *
169     * @param path The volume mount path.
170     * @param oldState The old state of the volume.
171     * @param newState The new state of the volume. Note: State is one of the
172     *            values returned by Environment.getExternalStorageState()
173     */
174    public void onStorageStateChanged(String path, String oldState, String newState)
175            throws RemoteException;
176}
177