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/*
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* Copyright (c) 2010, 2011, 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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/*
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*******************************************************************************
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* Copyright (C) 2009-2010, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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*******************************************************************************
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*/
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package sun.util.locale;
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import java.util.Collections;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Set;
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import java.util.SortedMap;
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import java.util.SortedSet;
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public class UnicodeLocaleExtension extends Extension {
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public static final char SINGLETON = 'u';
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private final Set<String> attributes;
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private final Map<String, String> keywords;
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public static final UnicodeLocaleExtension CA_JAPANESE
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= new UnicodeLocaleExtension("ca", "japanese");
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public static final UnicodeLocaleExtension NU_THAI
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= new UnicodeLocaleExtension("nu", "thai");
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private UnicodeLocaleExtension(String key, String value) {
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super(SINGLETON, key + "-" + value);
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attributes = Collections.emptySet();
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keywords = Collections.singletonMap(key, value);
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}
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UnicodeLocaleExtension(SortedSet<String> attributes, SortedMap<String, String> keywords) {
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super(SINGLETON);
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if (attributes != null) {
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this.attributes = attributes;
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} else {
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this.attributes = Collections.emptySet();
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}
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if (keywords != null) {
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this.keywords = keywords;
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} else {
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this.keywords = Collections.emptyMap();
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}
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if (!this.attributes.isEmpty() || !this.keywords.isEmpty()) {
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StringBuilder sb = new StringBuilder();
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for (String attribute : this.attributes) {
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sb.append(LanguageTag.SEP).append(attribute);
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}
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for (Entry<String, String> keyword : this.keywords.entrySet()) {
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String key = keyword.getKey();
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String value = keyword.getValue();
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sb.append(LanguageTag.SEP).append(key);
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if (value.length() > 0) {
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sb.append(LanguageTag.SEP).append(value);
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}
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}
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setValue(sb.substring(1)); // skip leading '-'
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}
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}
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public Set<String> getUnicodeLocaleAttributes() {
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if (attributes == Collections.EMPTY_SET) {
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return attributes;
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}
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return Collections.unmodifiableSet(attributes);
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}
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public Set<String> getUnicodeLocaleKeys() {
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if (keywords == Collections.EMPTY_MAP) {
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return Collections.emptySet();
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}
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return Collections.unmodifiableSet(keywords.keySet());
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}
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public String getUnicodeLocaleType(String unicodeLocaleKey) {
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return keywords.get(unicodeLocaleKey);
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}
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public static boolean isSingletonChar(char c) {
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return (SINGLETON == LocaleUtils.toLower(c));
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}
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public static boolean isAttribute(String s) {
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// 3*8alphanum
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int len = s.length();
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return (len >= 3) && (len <= 8) && LocaleUtils.isAlphaNumericString(s);
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}
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public static boolean isKey(String s) {
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// 2alphanum
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return (s.length() == 2) && LocaleUtils.isAlphaNumericString(s);
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}
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public static boolean isTypeSubtag(String s) {
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// 3*8alphanum
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int len = s.length();
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return (len >= 3) && (len <= 8) && LocaleUtils.isAlphaNumericString(s);
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}
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}
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