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  * Conditions Of Use
  * This software was developed by employees of the National Institute of
  * Standards and Technology (NIST), an agency of the Federal Government.
  * Pursuant to title 15 Untied States Code Section 105, works of NIST
  * employees are not subject to copyright protection in the United States
  * and are considered to be in the public domain.  As a result, a formal
  * license is not needed to use the software.
 * This software is provided by NIST as a service and is expressly
 * AND DATA ACCURACY.  NIST does not warrant or make any representations
 * regarding the use of the software or the results thereof, including but
 * not limited to the correctness, accuracy, reliability or usefulness of
 * the software.
 * Permission to use this software is contingent upon your acceptance
 * of the terms of this agreement
 * .
Product of NIST/ITL Advanced Networking Technologies Division (ANTD). * /
 package gov.nist.javax.sip.header;
ContentLanguage header
Fielding, et al.            Standards Track                   [Page 118] 
RFC 2616                        HTTP/1.1                       June 1999

  14.12 Content-Language

   The Content-Language entity-header field describes the natural
   language(s) of the intended audience for the enclosed entity. Note
   that this might not be equivalent to all the languages used within
   the entity-body.

       Content-Language  = "Content-Language" ":" 1#language-tag

   Language tags are defined in section 3.10. The primary purpose of
   Content-Language is to allow a user to identify and differentiate
   entities according to the user's own preferred language. Thus, if the
   body content is intended only for a Danish-literate audience, the
   appropriate field is

       Content-Language: da

   If no Content-Language is specified, the default is that the content
   is intended for all language audiences. This might mean that the
   sender does not consider it to be specific to any natural language,
   or that the sender does not know for which language it is intended.

   Multiple languages MAY be listed for content that is intended for
   multiple audiences. For example, a rendition of the "Treaty of
   Waitangi," presented simultaneously in the original Maori and English
   versions, would call for

       Content-Language: mi, en

   However, just because multiple languages are present within an entity
   does not mean that it is intended for multiple linguistic audiences.
   An example would be a beginner's language primer, such as "A First
   Lesson in Latin," which is clearly intended to be used by an
   English-literate audience. In this case, the Content-Language would
   properly only include "en".

   Content-Language MAY be applied to any media type -- it is not
   limited to textual documents.

M. Ranganathan
1.2 $Revision: 1.8 $ $Date: 2009/07/17 18:57:29 $
 public class ContentLanguage
     extends SIPHeader
     implements javax.sip.header.ContentLanguageHeader {

Comment for serialVersionUID
     private static final long serialVersionUID = -5195728427134181070L;
languageTag field.
     protected Locale locale;
     public ContentLanguage() {

Default constructor.

languageTag String to set
    public ContentLanguage(String languageTag) {
        this.setLanguageTaglanguageTag );

Canonical encoding of the value of the header.

encoded body of header.
    public String encodeBody() {
        return this.getLanguageTag();

get the languageTag field.

    public String getLanguageTag() {
        // JvB: Need to take sub-tags into account
        if ( "".equals(.getCountry())) {
            return .getLanguage();
        } else {
            return .getLanguage() + '-' + .getCountry();

set the languageTag field

languageTag -- language tag to set.
    public void setLanguageTag(String languageTag) {
        final int slash = languageTag.indexOf('-');
        if (slash>=0) {
            this. = new Locale(languageTag.substring(0,slash), languageTag.substring(slash+1) );
        } else {
            this. = new Locale(languageTag);

Gets the language value of the ContentLanguageHeader.

the Locale value of this ContentLanguageHeader
    public Locale getContentLanguage() {
        return ;

Sets the language parameter of this ContentLanguageHeader.

language - the new Locale value of the language of ContentLanguageHeader
    public void setContentLanguage(Locale language) {
        this. = language;
    public Object clone() {
        ContentLanguage retval = (ContentLanguagesuper.clone();
        if (this. != null)
            retval.locale = (Localethis..clone();
        return retval;
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