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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
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* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
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* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
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*/
package org.glassfish.jersey.message.internal;
import java.text.ParseException;
import java.util.Locale;
/**
* A language tag.
*
* @author Paul Sandoz
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public class LanguageTag {
protected String tag;
protected String primaryTag;
protected String subTags;
protected LanguageTag() {
}
public static LanguageTag valueOf(String s) throws IllegalArgumentException {
LanguageTag lt = new LanguageTag();
try {
lt.parse(s);
} catch (ParseException pe) {
throw new IllegalArgumentException(pe);
}
return lt;
}
public LanguageTag(String primaryTag, String subTags) {
if (subTags != null && subTags.length() > 0) {
this.tag = primaryTag + "-" + subTags;
} else {
this.tag = primaryTag;
}
this.primaryTag = primaryTag;
this.subTags = subTags;
}
public LanguageTag(String header) throws ParseException {
this(HttpHeaderReader.newInstance(header));
}
public LanguageTag(HttpHeaderReader reader) throws ParseException {
// Skip any white space
reader.hasNext();
tag = reader.nextToken();
if (reader.hasNext()) {
throw new ParseException("Invalid Language tag", reader.getIndex());
}
parse(tag);
}
public final boolean isCompatible(Locale tag) {
if (this.tag.equals("*")) {
return true;
}
if (subTags == null) {
return primaryTag.equalsIgnoreCase(tag.getLanguage());
} else {
return primaryTag.equalsIgnoreCase(tag.getLanguage())
&& subTags.equalsIgnoreCase(tag.getCountry());
}
}
public final Locale getAsLocale() {
return (subTags == null)
? new Locale(primaryTag)
: new Locale(primaryTag, subTags);
}
protected final void parse(String languageTag) throws ParseException {
if (!isValid(languageTag)) {
throw new ParseException("String, " + languageTag + ", is not a valid language tag", 0);
}
int index = languageTag.indexOf('-');
if (index == -1) {
primaryTag = languageTag;
subTags = null;
} else {
primaryTag = languageTag.substring(0, index);
subTags = languageTag.substring(index + 1, languageTag.length());
}
}
private boolean isValid(String tag) {
int alphaCount = 0;
for (int i = 0; i < tag.length(); i++) {
final char c = tag.charAt(i);
if (c == '-') {
if (alphaCount == 0) {
return false;
}
alphaCount = 0;
} else if (('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z')) {
alphaCount++;
if (alphaCount > 8) {
return false;
}
} else {
return false;
}
}
return (alphaCount != 0);
}
public final String getTag() {
return tag;
}
public final String getPrimaryTag() {
return primaryTag;
}
public final String getSubTags() {
return subTags;
}
@Override
public boolean equals(Object object) {
if (object == null || getClass() != object.getClass()) {
return false;
}
LanguageTag lt = (LanguageTag) object;
if (this.tag != null) {
if (!this.tag.equals(lt.getTag())) {
return false;
} else if (lt.getTag() != null) {
return false;
}
}
if (this.primaryTag != null) {
if (!this.primaryTag.equals(lt.getPrimaryTag())) {
return false;
} else if (lt.getPrimaryTag() != null) {
return false;
}
}
if (this.subTags != null) {
if (!this.subTags.equals(lt.getSubTags())) {
return false;
} else if (lt.getSubTags() != null) {
return false;
}
}
return true;
}
@Override
public int hashCode() {
int hash = 7;
hash = 47 * hash + (this.tag != null ? this.tag.hashCode() : 0);
hash = 47 * hash + (this.primaryTag != null ? this.primaryTag.hashCode() : 0);
hash = 47 * hash + (this.subTags != null ? this.subTags.hashCode() : 0);
return hash;
}
@Override
public String toString() {
return primaryTag + (subTags == null ? "" : subTags);
}
}