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      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 
     17 package com.android.gallery3d.data;
     18 
     19 import com.android.gallery3d.app.GalleryApp;
     20 
     21 public class MtpSource extends MediaSource {
     22     private static final String TAG = "MtpSource";
     23 
     24     private static final int MTP_DEVICESET = 0;
     25     private static final int MTP_DEVICE = 1;
     26     private static final int MTP_ITEM = 2;
     27 
     28     GalleryApp mApplication;
     29     PathMatcher mMatcher;
     30     MtpContext mMtpContext;
     31 
     32     public MtpSource(GalleryApp application) {
     33         super("mtp");
     34         mApplication = application;
     35         mMatcher = new PathMatcher();
     36         mMatcher.add("/mtp", MTP_DEVICESET);
     37         mMatcher.add("/mtp/*", MTP_DEVICE);
     38         mMatcher.add("/mtp/item/*/*", MTP_ITEM);
     39         mMtpContext = new MtpContext(mApplication.getAndroidContext());
     40     }
     41 
     42     @Override
     43     public MediaObject createMediaObject(Path path) {
     44         switch (mMatcher.match(path)) {
     45             case MTP_DEVICESET: {
     46                 return new MtpDeviceSet(path, mApplication, mMtpContext);
     47             }
     48             case MTP_DEVICE: {
     49                 int deviceId = mMatcher.getIntVar(0);
     50                 return new MtpDevice(path, mApplication, deviceId, mMtpContext);
     51             }
     52             case MTP_ITEM: {
     53                 int deviceId = mMatcher.getIntVar(0);
     54                 int objectId = mMatcher.getIntVar(1);
     55                 return new MtpImage(path, mApplication, deviceId, objectId, mMtpContext);
     56             }
     57             default:
     58                 throw new RuntimeException("bad path: " + path);
     59         }
     60     }
     61 
     62     @Override
     63     public void pause() {
     64         mMtpContext.pause();
     65     }
     66 
     67     @Override
     68     public void resume() {
     69         mMtpContext.resume();
     70     }
     71 
     72     public static boolean isMtpPath(String s) {
     73         return s != null && Path.fromString(s).getPrefix().equals("mtp");
     74     }
     75 }
     76