| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.eclipse.aether.spi.connector.checksum; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * Implementation performing checksum calculation for specific algorithm. Instances of this interface are stateful, |
| * non-thread safe, and should not be reused. |
| * |
| * @since 1.8.0 |
| */ |
| public interface ChecksumAlgorithm { |
| /** |
| * Updates the checksum algorithm inner state with input. |
| */ |
| void update(ByteBuffer input); |
| |
| /** |
| * Returns the algorithm end result as string, never {@code null}. After invoking this method, this instance should |
| * be discarded and not reused. For new checksum calculation you have to get new instance. |
| * |
| * Values returned by this method are handled as "opaque strings", and are used for simple equality checks (matches |
| * or not matches the checksum), and are also persisted in this form (locally to file system but also uploaded as |
| * checksum files). Resolver itself never tries to "decode" or "interpret" this string in any other way. |
| */ |
| String checksum(); |
| } |