1 /**
2 * Copyright 1&1 Internet AG, https://github.com/1and1/
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package net.oneandone.maven.plugins.billofmaterials;
17
18 import com.google.common.base.Function;
19 import com.google.common.hash.HashCode;
20 import com.google.common.hash.HashFunction;
21 import com.google.common.io.Files;
22 import java.io.File;
23 import java.io.IOException;
24
25 /**
26 * Creates a hashsum check for a single artifact.
27 * @author Mirko Friedenhagen
28 */
29 final class ToBomStringFunction implements Function<File, String> {
30 /**
31 * SHA1 algorithm.
32 */
33 private final HashFunction hashFunction;
34
35 /**
36 * @param hashFunction to use.
37 */
38 ToBomStringFunction(HashFunction hashFunction) {
39 this.hashFunction = hashFunction;
40 }
41
42 @Override
43 public String apply(final File file) {
44 final HashCode hash;
45 try {
46 hash = Files.hash(file, hashFunction);
47 } catch (IOException e) {
48 throw new IllegalArgumentException("Could not create hash for " + file, e);
49 }
50 return hash + " " + file.getName();
51 }
52
53 }