author | redestad |
Tue, 03 May 2016 15:50:54 +0200 | |
changeset 37781 | 71ed5645f17c |
parent 37593 | 824750ada3d6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.nio.fs; |
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import java.util.*; |
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import java.nio.file.*; |
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import java.nio.charset.Charset; |
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import sun.security.action.GetPropertyAction; |
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/** |
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* Utility methods |
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*/ |
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class Util { |
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private Util() { } |
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private static final Charset jnuEncoding = Charset.forName( |
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GetPropertyAction.privilegedGetProperty("sun.jnu.encoding")); |
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/** |
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* Returns {@code Charset} corresponding to the sun.jnu.encoding property |
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*/ |
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static Charset jnuEncoding() { |
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return jnuEncoding; |
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} |
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/** |
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* Encodes the given String into a sequence of bytes using the {@code Charset} |
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* specified by the sun.jnu.encoding property. |
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*/ |
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static byte[] toBytes(String s) { |
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return s.getBytes(jnuEncoding); |
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} |
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/** |
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* Constructs a new String by decoding the specified array of bytes using the |
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* {@code Charset} specified by the sun.jnu.encoding property. |
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*/ |
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static String toString(byte[] bytes) { |
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return new String(bytes, jnuEncoding); |
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} |
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/** |
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* Splits a string around the given character. The array returned by this |
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* method contains each substring that is terminated by the character. Use |
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* for simple string spilting cases when needing to avoid loading regex. |
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*/ |
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static String[] split(String s, char c) { |
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int count = 0; |
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for (int i=0; i<s.length(); i++) { |
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if (s.charAt(i) == c) |
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count++; |
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} |
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String[] result = new String[count+1]; |
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int n = 0; |
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int last = 0; |
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for (int i=0; i<s.length(); i++) { |
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if (s.charAt(i) == c) { |
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result[n++] = s.substring(last, i); |
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last = i + 1; |
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} |
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} |
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result[n] = s.substring(last, s.length()); |
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return result; |
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} |
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/** |
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* Returns a Set containing the given elements. |
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*/ |
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@SafeVarargs |
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static <E> Set<E> newSet(E... elements) { |
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HashSet<E> set = new HashSet<>(); |
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for (E e: elements) { |
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set.add(e); |
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} |
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return set; |
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} |
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* Returns a Set containing all the elements of the given Set plus |
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* the given elements. |
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*/ |
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@SafeVarargs |
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static <E> Set<E> newSet(Set<E> other, E... elements) { |
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HashSet<E> set = new HashSet<>(other); |
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for (E e: elements) { |
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set.add(e); |
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} |
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return set; |
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} |
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/** |
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* Returns {@code true} if symbolic links should be followed |
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*/ |
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static boolean followLinks(LinkOption... options) { |
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boolean followLinks = true; |
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for (LinkOption option: options) { |
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if (option == LinkOption.NOFOLLOW_LINKS) { |
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followLinks = false; |
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} else if (option == null) { |
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throw new NullPointerException(); |
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} else { |
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throw new AssertionError("Should not get here"); |
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} |
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} |
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return followLinks; |
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} |
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} |