| /* |
| * Copyright (c) 2009, 2013, 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 sun.nio.fs; |
| |
| import java.util.*; |
| import java.nio.file.*; |
| import java.nio.charset.Charset; |
| import java.security.*; |
| import sun.security.action.*; |
| |
| /** |
| * Utility methods |
| */ |
| |
| class Util { |
| private Util() { } |
| |
| private static final Charset jnuEncoding = Charset.forName( |
| AccessController.doPrivileged(new GetPropertyAction("sun.jnu.encoding"))); |
| |
| /** |
| * Returns {@code Charset} corresponding to the sun.jnu.encoding property |
| */ |
| static Charset jnuEncoding() { |
| return jnuEncoding; |
| } |
| |
| /** |
| * Encodes the given String into a sequence of bytes using the {@code Charset} |
| * specified by the sun.jnu.encoding property. |
| */ |
| static byte[] toBytes(String s) { |
| return s.getBytes(jnuEncoding); |
| } |
| |
| /** |
| * Constructs a new String by decoding the specified array of bytes using the |
| * {@code Charset} specified by the sun.jnu.encoding property. |
| */ |
| static String toString(byte[] bytes) { |
| return new String(bytes, jnuEncoding); |
| } |
| |
| |
| /** |
| * Splits a string around the given character. The array returned by this |
| * method contains each substring that is terminated by the character. Use |
| * for simple string spilting cases when needing to avoid loading regex. |
| */ |
| static String[] split(String s, char c) { |
| int count = 0; |
| for (int i=0; i<s.length(); i++) { |
| if (s.charAt(i) == c) |
| count++; |
| } |
| String[] result = new String[count+1]; |
| int n = 0; |
| int last = 0; |
| for (int i=0; i<s.length(); i++) { |
| if (s.charAt(i) == c) { |
| result[n++] = s.substring(last, i); |
| last = i + 1; |
| } |
| } |
| result[n] = s.substring(last, s.length()); |
| return result; |
| } |
| |
| /** |
| * Returns a Set containing the given elements. |
| */ |
| @SafeVarargs |
| static <E> Set<E> newSet(E... elements) { |
| HashSet<E> set = new HashSet<>(); |
| for (E e: elements) { |
| set.add(e); |
| } |
| return set; |
| } |
| |
| /** |
| * Returns a Set containing all the elements of the given Set plus |
| * the given elements. |
| */ |
| @SafeVarargs |
| static <E> Set<E> newSet(Set<E> other, E... elements) { |
| HashSet<E> set = new HashSet<>(other); |
| for (E e: elements) { |
| set.add(e); |
| } |
| return set; |
| } |
| |
| /** |
| * Returns {@code true} if symbolic links should be followed |
| */ |
| static boolean followLinks(LinkOption... options) { |
| boolean followLinks = true; |
| for (LinkOption option: options) { |
| if (option == LinkOption.NOFOLLOW_LINKS) { |
| followLinks = false; |
| } else if (option == null) { |
| throw new NullPointerException(); |
| } else { |
| throw new AssertionError("Should not get here"); |
| } |
| } |
| return followLinks; |
| } |
| } |