--- a/jdk/src/java.base/share/classes/jdk/internal/module/Hasher.java	Wed Jul 05 21:39:33 2017 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,142 +0,0 @@
-/*
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-package jdk.internal.module;
-
-import java.io.IOException;
-import java.io.UncheckedIOException;
-import java.nio.ByteBuffer;
-import java.nio.channels.FileChannel;
-import java.nio.file.Path;
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-import java.util.Base64;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Set;
-
-/**
- * Supporting class for computing, encoding and decoding hashes (message
- * digests).
- */
-
-public class Hasher {
-    private Hasher() { }
-
-    /**
-     * A supplier of an encoded message digest.
-     */
-    public static interface HashSupplier {
-        String generate(String algorithm);
-    }
-
-    /**
-     * Encapsulates the result of hashing the contents of a number of module
-     * artifacts.
-     */
-    public static class DependencyHashes {
-        private final String algorithm;
-        private final Map<String, String> nameToHash;
-
-        public DependencyHashes(String algorithm, Map<String, String> nameToHash) {
-            this.algorithm = algorithm;
-            this.nameToHash = nameToHash;
-        }
-
-        /**
-         * Returns the algorithm used to hash the dependences ("SHA-256" or
-         * "MD5" for example).
-         */
-        public String algorithm() {
-            return algorithm;
-        }
-
-        /**
-         * Returns the set of module names for which hashes are recorded.
-         */
-        public Set<String> names() {
-            return nameToHash.keySet();
-        }
-
-        /**
-         * Retruns the hash string for the given module name, {@code null}
-         * if there is no hash recorded for the module.
-         */
-        public String hashFor(String dn) {
-            return nameToHash.get(dn);
-        }
-    }
-
-
-    /**
-     * Computes the hash for the given file with the given message digest
-     * algorithm. Returns the results a base64-encoded String.
-     *
-     * @throws UncheckedIOException if an I/O error occurs
-     * @throws RuntimeException if the algorithm is not available
-     */
-    public static String generate(Path file, String algorithm) {
-        try {
-            MessageDigest md = MessageDigest.getInstance(algorithm);
-
-            // Ideally we would just mmap the file but this consumes too much
-            // memory when jlink is running concurrently on very large jmods
-            try (FileChannel fc = FileChannel.open(file)) {
-                ByteBuffer bb = ByteBuffer.allocate(32*1024);
-                int nread;
-                while ((nread = fc.read(bb)) > 0) {
-                    bb.flip();
-                    md.update(bb);
-                    assert bb.remaining() == 0;
-                    bb.clear();
-                }
-            }
-
-            byte[] bytes = md.digest();
-            return Base64.getEncoder().encodeToString(bytes);
-        } catch (NoSuchAlgorithmException e) {
-            throw new RuntimeException(e);
-        } catch (IOException ioe) {
-            throw new UncheckedIOException(ioe);
-        }
-    }
-
-    /**
-     * Computes the hash for every entry in the given map, returning a
-     * {@code DependencyHashes} to encapsulate the result. The map key is
-     * the entry name, typically the module name. The map value is the file
-     * path to the entry (module artifact).
-     *
-     * @return DependencyHashes encapsulate the hashes
-     */
-    public static DependencyHashes generate(Map<String, Path> map, String algorithm) {
-        Map<String, String> nameToHash = new HashMap<>();
-        for (Map.Entry<String, Path> entry: map.entrySet()) {
-            String name = entry.getKey();
-            Path path = entry.getValue();
-            nameToHash.put(name, generate(path, algorithm));
-        }
-        return new DependencyHashes(algorithm, nameToHash);
-    }
-}