| /* |
| * Copyright (C) 2017 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.util.apk; |
| |
| import java.io.IOException; |
| import java.security.DigestException; |
| |
| /** Source of data to be digested. */ |
| interface DataSource { |
| |
| /** |
| * Returns the size (in bytes) of the data offered by this source. |
| */ |
| long size(); |
| |
| /** |
| * Feeds the specified region of this source's data into the provided digester. |
| * |
| * @param offset offset of the region inside this data source. |
| * @param size size (in bytes) of the region. |
| */ |
| void feedIntoDataDigester(DataDigester md, long offset, int size) |
| throws IOException, DigestException; |
| } |