| /* |
| * Copyright (C) 2015 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.mtp; |
| |
| /** |
| * Static utilities for ID. |
| */ |
| class Identifier { |
| final int mDeviceId; |
| final int mStorageId; |
| final int mObjectHandle; |
| |
| static Identifier createFromRootId(String rootId) { |
| final String[] components = rootId.split("_"); |
| return new Identifier( |
| Integer.parseInt(components[0]), |
| Integer.parseInt(components[1])); |
| } |
| |
| static Identifier createFromDocumentId(String documentId) { |
| final String[] components = documentId.split("_"); |
| return new Identifier( |
| Integer.parseInt(components[0]), |
| Integer.parseInt(components[1]), |
| Integer.parseInt(components[2])); |
| } |
| |
| |
| Identifier(int deviceId, int storageId) { |
| this(deviceId, storageId, CursorHelper.DUMMY_HANDLE_FOR_ROOT); |
| } |
| |
| Identifier(int deviceId, int storageId, int objectHandle) { |
| mDeviceId = deviceId; |
| mStorageId = storageId; |
| mObjectHandle = objectHandle; |
| } |
| |
| // TODO: Make the ID persistent. |
| String toRootId() { |
| return String.format("%d_%d", mDeviceId, mStorageId); |
| } |
| |
| // TODO: Make the ID persistent. |
| String toDocumentId() { |
| return String.format("%d_%d_%d", mDeviceId, mStorageId, mObjectHandle); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof Identifier)) |
| return false; |
| final Identifier other = (Identifier)obj; |
| return mDeviceId == other.mDeviceId && mStorageId == other.mStorageId && |
| mObjectHandle == other.mObjectHandle; |
| } |
| |
| @Override |
| public int hashCode() { |
| return (mDeviceId << 16) ^ (mStorageId << 8) ^ mObjectHandle; |
| } |
| } |