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/*
* 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 android.content.ContentProviderClient;
import android.database.Cursor;
import android.net.Uri;
import android.os.RemoteException;
import android.provider.MediaStore.Audio;
import android.provider.MediaStore.Files;
import android.provider.MediaStore.Images;
import android.util.Log;
import java.util.ArrayList;
/**
* MtpPropertyGroup represents a list of MTP properties.
* {@hide}
*/
class MtpPropertyGroup {
private static final String TAG = MtpPropertyGroup.class.getSimpleName();
private class Property {
int code;
int type;
int column;
Property(int code, int type, int column) {
this.code = code;
this.type = type;
this.column = column;
}
}
// list of all properties in this group
private final Property[] mProperties;
// list of columns for database query
private String[] mColumns;
private static final String PATH_WHERE = Files.FileColumns.DATA + "=?";
// constructs a property group for a list of properties
public MtpPropertyGroup(int[] properties) {
int count = properties.length;
ArrayList<String> columns = new ArrayList<>(count);
columns.add(Files.FileColumns._ID);
mProperties = new Property[count];
for (int i = 0; i < count; i++) {
mProperties[i] = createProperty(properties[i], columns);
}
count = columns.size();
mColumns = new String[count];
for (int i = 0; i < count; i++) {
mColumns[i] = columns.get(i);
}
}
private Property createProperty(int code, ArrayList<String> columns) {
String column = null;
int type;
switch (code) {
case MtpConstants.PROPERTY_STORAGE_ID:
type = MtpConstants.TYPE_UINT32;
break;
case MtpConstants.PROPERTY_OBJECT_FORMAT:
type = MtpConstants.TYPE_UINT16;
break;
case MtpConstants.PROPERTY_PROTECTION_STATUS:
type = MtpConstants.TYPE_UINT16;
break;
case MtpConstants.PROPERTY_OBJECT_SIZE:
type = MtpConstants.TYPE_UINT64;
break;
case MtpConstants.PROPERTY_OBJECT_FILE_NAME:
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_NAME:
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_DATE_MODIFIED:
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_DATE_ADDED:
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_ORIGINAL_RELEASE_DATE:
column = Audio.AudioColumns.YEAR;
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_PARENT_OBJECT:
type = MtpConstants.TYPE_UINT32;
break;
case MtpConstants.PROPERTY_PERSISTENT_UID:
type = MtpConstants.TYPE_UINT128;
break;
case MtpConstants.PROPERTY_DURATION:
column = Audio.AudioColumns.DURATION;
type = MtpConstants.TYPE_UINT32;
break;
case MtpConstants.PROPERTY_TRACK:
column = Audio.AudioColumns.TRACK;
type = MtpConstants.TYPE_UINT16;
break;
case MtpConstants.PROPERTY_DISPLAY_NAME:
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_ARTIST:
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_ALBUM_NAME:
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_ALBUM_ARTIST:
column = Audio.AudioColumns.ALBUM_ARTIST;
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_COMPOSER:
column = Audio.AudioColumns.COMPOSER;
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_DESCRIPTION:
column = Images.ImageColumns.DESCRIPTION;
type = MtpConstants.TYPE_STR;
break;
case MtpConstants.PROPERTY_AUDIO_WAVE_CODEC:
case MtpConstants.PROPERTY_AUDIO_BITRATE:
case MtpConstants.PROPERTY_SAMPLE_RATE:
// these are special cased
type = MtpConstants.TYPE_UINT32;
break;
case MtpConstants.PROPERTY_BITRATE_TYPE:
case MtpConstants.PROPERTY_NUMBER_OF_CHANNELS:
// these are special cased
type = MtpConstants.TYPE_UINT16;
break;
default:
type = MtpConstants.TYPE_UNDEFINED;
Log.e(TAG, "unsupported property " + code);
break;
}
if (column != null) {
columns.add(column);
return new Property(code, type, columns.size() - 1);
} else {
return new Property(code, type, -1);
}
}
/**
* Gets the values of the properties represented by this property group for the given
* object and adds them to the given property list.
* @return Response_OK if the operation succeeded.
*/
public int getPropertyList(ContentProviderClient provider, String volumeName,
MtpStorageManager.MtpObject object, MtpPropertyList list) {
Cursor c = null;
int id = object.getId();
String path = object.getPath().toString();
for (Property property : mProperties) {
if (property.column != -1 && c == null) {
try {
// Look up the entry in MediaProvider only if one of those properties is needed.
final Uri uri = MtpDatabase.getObjectPropertiesUri(object.getFormat(),
volumeName);
c = provider.query(uri, mColumns,
PATH_WHERE, new String[] {path}, null, null);
if (c != null && !c.moveToNext()) {
c.close();
c = null;
}
} catch (IllegalArgumentException e) {
return MtpConstants.RESPONSE_INVALID_OBJECT_PROP_CODE;
} catch (RemoteException e) {
Log.e(TAG, "Mediaprovider lookup failed");
}
}
switch (property.code) {
case MtpConstants.PROPERTY_PROTECTION_STATUS:
// protection status is always 0
list.append(id, property.code, property.type, 0);
break;
case MtpConstants.PROPERTY_NAME:
case MtpConstants.PROPERTY_OBJECT_FILE_NAME:
case MtpConstants.PROPERTY_DISPLAY_NAME:
list.append(id, property.code, object.getName());
break;
case MtpConstants.PROPERTY_DATE_MODIFIED:
case MtpConstants.PROPERTY_DATE_ADDED:
// convert from seconds to DateTime
list.append(id, property.code,
format_date_time(object.getModifiedTime()));
break;
case MtpConstants.PROPERTY_STORAGE_ID:
list.append(id, property.code, property.type, object.getStorageId());
break;
case MtpConstants.PROPERTY_OBJECT_FORMAT:
list.append(id, property.code, property.type, object.getFormat());
break;
case MtpConstants.PROPERTY_OBJECT_SIZE:
list.append(id, property.code, property.type, object.getSize());
break;
case MtpConstants.PROPERTY_PARENT_OBJECT:
list.append(id, property.code, property.type,
object.getParent().isRoot() ? 0 : object.getParent().getId());
break;
case MtpConstants.PROPERTY_PERSISTENT_UID:
// The persistent uid must be unique and never reused among all objects,
// and remain the same between sessions.
long puid = (object.getPath().toString().hashCode() << 32)
+ object.getModifiedTime();
list.append(id, property.code, property.type, puid);
break;
case MtpConstants.PROPERTY_ORIGINAL_RELEASE_DATE:
// release date is stored internally as just the year
int year = 0;
if (c != null)
year = c.getInt(property.column);
String dateTime = Integer.toString(year) + "0101T000000";
list.append(id, property.code, dateTime);
break;
case MtpConstants.PROPERTY_TRACK:
int track = 0;
if (c != null)
track = c.getInt(property.column);
list.append(id, property.code, MtpConstants.TYPE_UINT16,
track % 1000);
break;
case MtpConstants.PROPERTY_AUDIO_WAVE_CODEC:
case MtpConstants.PROPERTY_AUDIO_BITRATE:
case MtpConstants.PROPERTY_SAMPLE_RATE:
// we don't have these in our database, so return 0
list.append(id, property.code, MtpConstants.TYPE_UINT32, 0);
break;
case MtpConstants.PROPERTY_BITRATE_TYPE:
case MtpConstants.PROPERTY_NUMBER_OF_CHANNELS:
// we don't have these in our database, so return 0
list.append(id, property.code, MtpConstants.TYPE_UINT16, 0);
break;
default:
switch(property.type) {
case MtpConstants.TYPE_UNDEFINED:
list.append(id, property.code, property.type, 0);
break;
case MtpConstants.TYPE_STR:
String value = "";
if (c != null)
value = c.getString(property.column);
list.append(id, property.code, value);
break;
default:
long longValue = 0L;
if (c != null)
longValue = c.getLong(property.column);
list.append(id, property.code, property.type, longValue);
}
}
}
if (c != null)
c.close();
return MtpConstants.RESPONSE_OK;
}
private native String format_date_time(long seconds);
}
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