| /* |
| * Copyright (C) 2015, Matthias Sohn <matthias.sohn@sap.com> |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package org.eclipse.jgit.lfs.test; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import java.io.BufferedInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.security.MessageDigest; |
| |
| import org.eclipse.jgit.lfs.lib.Constants; |
| import org.eclipse.jgit.lfs.lib.LongObjectId; |
| |
| public class LongObjectIdTestUtils { |
| |
| /** |
| * Create id as hash of the given string. |
| * |
| * @param s |
| * the string to hash |
| * @return id calculated by hashing string |
| */ |
| public static LongObjectId hash(String s) { |
| MessageDigest md = Constants.newMessageDigest(); |
| md.update(s.getBytes(UTF_8)); |
| return LongObjectId.fromRaw(md.digest()); |
| } |
| |
| /** |
| * Create id as hash of a file content |
| * |
| * @param file |
| * the file to hash |
| * @return id calculated by hashing file content |
| * @throws FileNotFoundException |
| * if file doesn't exist |
| * @throws IOException |
| */ |
| public static LongObjectId hash(Path file) |
| throws FileNotFoundException, IOException { |
| MessageDigest md = Constants.newMessageDigest(); |
| try (InputStream is = new BufferedInputStream( |
| Files.newInputStream(file))) { |
| final byte[] buffer = new byte[4096]; |
| for (int read = 0; (read = is.read(buffer)) != -1;) { |
| md.update(buffer, 0, read); |
| } |
| } |
| return LongObjectId.fromRaw(md.digest()); |
| } |
| } |