media/java/android/mtp/MtpServer.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 android.mtp;

import com.android.internal.util.Preconditions;

/**
 * Java wrapper for MTP/PTP support as USB responder.
 * {@hide}
 */
public class MtpServer implements Runnable {

    private long mNativeContext; // accessed by native methods
    private final MtpDatabase mDatabase;
    private final Runnable mOnTerminate;

    static {
        System.loadLibrary("media_jni");
    }

    public MtpServer(MtpDatabase database, boolean usePtp, Runnable onTerminate) {
        mDatabase = Preconditions.checkNotNull(database);
        mOnTerminate = Preconditions.checkNotNull(onTerminate);
        native_setup(database, usePtp);
        database.setServer(this);
    }

    public void start() {
        Thread thread = new Thread(this, "MtpServer");
        thread.start();
    }

    @Override
    public void run() {
        native_run();
        native_cleanup();
        mDatabase.close();
        mOnTerminate.run();
    }

    public void sendObjectAdded(int handle) {
        native_send_object_added(handle);
    }

    public void sendObjectRemoved(int handle) {
        native_send_object_removed(handle);
    }

    public void sendDevicePropertyChanged(int property) {
        native_send_device_property_changed(property);
    }

    public void addStorage(MtpStorage storage) {
        native_add_storage(storage);
    }

    public void removeStorage(MtpStorage storage) {
        native_remove_storage(storage.getStorageId());
    }

    private native final void native_setup(MtpDatabase database, boolean usePtp);
    private native final void native_run();
    private native final void native_cleanup();
    private native final void native_send_object_added(int handle);
    private native final void native_send_object_removed(int handle);
    private native final void native_send_device_property_changed(int property);
    private native final void native_add_storage(MtpStorage storage);
    private native final void native_remove_storage(int storageId);
}