/*
* Copyright (c) 2009, 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
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*/
/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* The MIT License
*
* Copyright (c) 2004-2015 Paul R. Holser, Jr.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package jdk.internal.joptsimple.internal;
import java.util.Iterator;
import static java.lang.System.*;
import static java.util.Arrays.*;
/**
* @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>
*/
public final class Strings {
public static final String EMPTY = "";
public static final String LINE_SEPARATOR = getProperty( "line.separator" );
private Strings() {
throw new UnsupportedOperationException();
}
/**
* Gives a string consisting of the given character repeated the given number of times.
*
* @param ch the character to repeat
* @param count how many times to repeat the character
* @return the resultant string
*/
public static String repeat( char ch, int count ) {
StringBuilder buffer = new StringBuilder();
for ( int i = 0; i < count; ++i )
buffer.append( ch );
return buffer.toString();
}
/**
* Tells whether the given string is either {@code} or consists solely of whitespace characters.
*
* @param target string to check
* @return {@code true} if the target string is null or empty
*/
public static boolean isNullOrEmpty( String target ) {
return target == null || target.isEmpty();
}
/**
* Gives a string consisting of a given string prepended and appended with surrounding characters.
*
* @param target a string
* @param begin character to prepend
* @param end character to append
* @return the surrounded string
*/
public static String surround( String target, char begin, char end ) {
return begin + target + end;
}
/**
* Gives a string consisting of the elements of a given array of strings, each separated by a given separator
* string.
*
* @param pieces the strings to join
* @param separator the separator
* @return the joined string
*/
public static String join( String[] pieces, String separator ) {
return join( asList( pieces ), separator );
}
/**
* Gives a string consisting of the string representations of the elements of a given array of objects,
* each separated by a given separator string.
*
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