/*
* Copyright (c) 2009, 2011, 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.*;
/**
* Utility methods
*/
class Util {
private Util() { }
/**
* 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;
}
}