1 package org.eclipse.aether.spi.connector.checksum;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.util.List;
23 import java.util.Map;
24
25 import org.eclipse.aether.RepositorySystemSession;
26 import org.eclipse.aether.spi.connector.ArtifactDownload;
27
28 /**
29 * Component able to provide (expected) checksums beforehand the download happens. Checksum provided by this component
30 * are of kind {@link org.eclipse.aether.spi.connector.checksum.ChecksumPolicy.ChecksumKind#PROVIDED}.
31 *
32 * @since 1.8.0
33 */
34 public interface ProvidedChecksumsSource
35 {
36 /**
37 * May return the provided checksums (for given artifact transfer) from trusted source other than remote
38 * repository, or {@code null}.
39 *
40 * @param transfer The transfer that is about to be executed.
41 * @param checksumAlgorithmFactories The checksum algorithms that are expected.
42 * @return Map of expected checksums, or {@code null}.
43 */
44 Map<String, String> getProvidedArtifactChecksums( RepositorySystemSession session,
45 ArtifactDownload transfer,
46 List<ChecksumAlgorithmFactory> checksumAlgorithmFactories );
47 }