src/com/android/gallery3d/data/MtpSource.java

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed 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.
 */

package com.android.gallery3d.data;

import com.android.gallery3d.app.GalleryApp;

public class MtpSource extends MediaSource {
    private static final String TAG = "MtpSource";

    private static final int MTP_DEVICESET = 0;
    private static final int MTP_DEVICE = 1;
    private static final int MTP_ITEM = 2;

    GalleryApp mApplication;
    PathMatcher mMatcher;
    MtpContext mMtpContext;

    public MtpSource(GalleryApp application) {
        super("mtp");
        mApplication = application;
        mMatcher = new PathMatcher();
        mMatcher.add("/mtp", MTP_DEVICESET);
        mMatcher.add("/mtp/*", MTP_DEVICE);
        mMatcher.add("/mtp/item/*/*", MTP_ITEM);
        mMtpContext = new MtpContext(mApplication.getAndroidContext());
    }

    @Override
    public MediaObject createMediaObject(Path path) {
        switch (mMatcher.match(path)) {
            case MTP_DEVICESET: {
                return new MtpDeviceSet(path, mApplication, mMtpContext);
            }
            case MTP_DEVICE: {
                int deviceId = mMatcher.getIntVar(0);
                return new MtpDevice(path, mApplication, deviceId, mMtpContext);
            }
            case MTP_ITEM: {
                int deviceId = mMatcher.getIntVar(0);
                int objectId = mMatcher.getIntVar(1);
                return new MtpImage(path, mApplication, deviceId, objectId, mMtpContext);
            }
            default:
                throw new RuntimeException("bad path: " + path);
        }
    }

    @Override
    public void pause() {
        mMtpContext.pause();
    }

    @Override
    public void resume() {
        mMtpContext.resume();
    }

    public static boolean isMtpPath(String s) {
        return s != null && Path.fromString(s).getPrefix().equals("mtp");
    }
}