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Spring Cloud Contract Shaded Dependencies
/*
* 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 shaded.shaded.org.eclipse.aether.spi.connector.checksum;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.file.Files;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* Helper for checksum operations.
*
* @since 1.8.0
*/
public final class ChecksumAlgorithmHelper {
private ChecksumAlgorithmHelper() {
// nop
}
/**
* Calculates checksums for specified data.
*
* @param data The content for which to calculate checksums, must not be {@code null}.
* @param factories The checksum algorithm factories to use, must not be {@code null}.
* @return The calculated checksums, indexed by algorithm name, or the exception that occurred while trying to
* calculate it, never {@code null}.
* @throws IOException In case of any problem.
*/
public static Map calculate(byte[] data, List factories)
throws IOException {
try (InputStream inputStream = new ByteArrayInputStream(data)) {
return calculate(inputStream, factories);
}
}
/**
* Calculates checksums for specified file.
*
* @param file The file for which to calculate checksums, must not be {@code null}.
* @param factories The checksum algorithm factories to use, must not be {@code null}.
* @return The calculated checksums, indexed by algorithm name, or the exception that occurred while trying to
* calculate it, never {@code null}.
* @throws IOException In case of any problem.
*/
public static Map calculate(File file, List factories)
throws IOException {
try (InputStream inputStream = new BufferedInputStream(Files.newInputStream(file.toPath()))) {
return calculate(inputStream, factories);
}
}
private static Map calculate(InputStream inputStream, List factories)
throws IOException {
LinkedHashMap algorithms = new LinkedHashMap<>();
factories.forEach(f -> algorithms.put(f.getName(), f.getAlgorithm()));
final byte[] buffer = new byte[1024 * 32];
for (; ; ) {
int read = inputStream.read(buffer);
if (read < 0) {
break;
}
for (ChecksumAlgorithm checksumAlgorithm : algorithms.values()) {
checksumAlgorithm.update(ByteBuffer.wrap(buffer, 0, read));
}
}
LinkedHashMap result = new LinkedHashMap<>();
algorithms.forEach((k, v) -> result.put(k, v.checksum()));
return result;
}
}