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	/*
	* Copyright (c) 2010, 2012, 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.
	*/

	/*
	*******************************************************************************
	* Copyright (C) 2009, International Business Machines Corporation and *
	* others. All Rights Reserved. *
	*******************************************************************************
	*/
	package sun.util.locale;

	import java.util.List;
	import java.util.Map;
	import java.util.Set;

	/**
	* Collection of static utility methods for Locale support. The
	* methods which manipulate characters or strings support ASCII only.
	*/
	public final class LocaleUtils {

	private LocaleUtils() {
	}

	/**
	* Compares two ASCII Strings s1 and s2, ignoring case.
	*/
	public static boolean caseIgnoreMatch(String s1, String s2) {
	if (s1 == s2) {
	return true;
	}

	int len = s1.length();
	if (len != s2.length()) {
	return false;
	}

	for (int i = 0; i < len; i++) {
	char c1 = s1.charAt(i);
	char c2 = s2.charAt(i);
	if (c1 != c2 && toLower(c1) != toLower(c2)) {
	return false;
	}
	}
	return true;
	}

	static int caseIgnoreCompare(String s1, String s2) {
	if (s1 == s2) {
	return 0;
	}
	return toLowerString(s1).compareTo(toLowerString(s2));
	}

	static char toUpper(char c) {
	return isLower(c) ? (char)(c - 0x20) : c;
	}

	static char toLower(char c) {
	return isUpper(c) ? (char)(c + 0x20) : c;
	}

	/**
	* Converts the given ASCII String to lower-case.
	*/
	public static String toLowerString(String s) {
	int len = s.length();
	int idx = 0;
	for (; idx < len; idx++) {
	if (isUpper(s.charAt(idx))) {
	break;
	}
	}
	if (idx == len) {
	return s;
	}

	char[] buf = new char[len];
	for (int i = 0; i < len; i++) {
	char c = s.charAt(i);
	buf[i] = (i < idx) ? c : toLower(c);
	}
	return new String(buf);
	}

	static String toUpperString(String s) {
	int len = s.length();
	int idx = 0;
	for (; idx < len; idx++) {
	if (isLower(s.charAt(idx))) {
	break;
	}
	}
	if (idx == len) {
	return s;
	}

	char[] buf = new char[len];
	for (int i = 0; i < len; i++) {
	char c = s.charAt(i);
	buf[i] = (i < idx) ? c : toUpper(c);
	}
	return new String(buf);
	}

	static String toTitleString(String s) {
	int len;
	if ((len = s.length()) == 0) {
	return s;
	}
	int idx = 0;
	if (!isLower(s.charAt(idx))) {
	for (idx = 1; idx < len; idx++) {
	if (isUpper(s.charAt(idx))) {
	break;
	}
	}
	}
	if (idx == len) {
	return s;
	}

	char[] buf = new char[len];
	for (int i = 0; i < len; i++) {
	char c = s.charAt(i);
	if (i == 0 && idx == 0) {
	buf[i] = toUpper(c);
	} else if (i < idx) {
	buf[i] = c;
	} else {
	buf[i] = toLower(c);
	}
	}
	return new String(buf);
	}

	private static boolean isUpper(char c) {
	return c >= 'A' && c <= 'Z';
	}

	private static boolean isLower(char c) {
	return c >= 'a' && c <= 'z';
	}

	static boolean isAlpha(char c) {
	return (c >= 'A' && c <= 'Z') \|\| (c >= 'a' && c <= 'z');
	}

	static boolean isAlphaString(String s) {
	int len = s.length();
	for (int i = 0; i < len; i++) {
	if (!isAlpha(s.charAt(i))) {
	return false;
	}
	}
	return true;
	}

	static boolean isNumeric(char c) {
	return (c >= '0' && c <= '9');
	}

	static boolean isNumericString(String s) {
	int len = s.length();
	for (int i = 0; i < len; i++) {
	if (!isNumeric(s.charAt(i))) {
	return false;
	}
	}
	return true;
	}

	static boolean isAlphaNumeric(char c) {
	return isAlpha(c) \|\| isNumeric(c);
	}

	public static boolean isAlphaNumericString(String s) {
	int len = s.length();
	for (int i = 0; i < len; i++) {
	if (!isAlphaNumeric(s.charAt(i))) {
	return false;
	}
	}
	return true;
	}

	static boolean isEmpty(String str) {
	return str == null \|\| str.length() == 0;
	}

	static boolean isEmpty(Set<?> set) {
	return set == null \|\| set.isEmpty();
	}

	static boolean isEmpty(Map<?, ?> map) {
	return map == null \|\| map.isEmpty();
	}

	static boolean isEmpty(List<?> list) {
	return list == null \|\| list.isEmpty();
	}
	}

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