001package org.hl7.fhir.r4.utils;
002
003/*
004  Copyright (c) 2011+, HL7, Inc.
005  All rights reserved.
006  
007  Redistribution and use in source and binary forms, with or without modification, 
008  are permitted provided that the following conditions are met:
009    
010   * Redistributions of source code must retain the above copyright notice, this 
011     list of conditions and the following disclaimer.
012   * Redistributions in binary form must reproduce the above copyright notice, 
013     this list of conditions and the following disclaimer in the documentation 
014     and/or other materials provided with the distribution.
015   * Neither the name of HL7 nor the names of its contributors may be used to 
016     endorse or promote products derived from this software without specific 
017     prior written permission.
018  
019  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
020  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
021  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
022  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
023  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
024  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
025  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
026  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
027  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
028  POSSIBILITY OF SUCH DAMAGE.
029  
030 */
031
032import java.io.FileNotFoundException;
033import java.io.IOException;
034import java.util.HashMap;
035import java.util.Map;
036
037import javax.xml.parsers.DocumentBuilder;
038import javax.xml.parsers.DocumentBuilderFactory;
039import javax.xml.parsers.ParserConfigurationException;
040
041import org.hl7.fhir.utilities.filesystem.CSFileInputStream;
042import org.hl7.fhir.utilities.xml.XMLUtil;
043import org.w3c.dom.Document;
044import org.w3c.dom.Element;
045import org.xml.sax.SAXException;
046
047public class Translations {
048
049  private String[] lang;
050  private Map<String, Element> messages = new HashMap<String, Element>();
051
052  /**
053   * Set a default language to use
054   * 
055   * @param lang
056   */
057  public void setLang(String lang) {
058    this.lang = lang.split("[.;]");
059  }
060
061  /**
062   * Load from the XML translations file maintained by the FHIR project
063   * 
064   * @param filename
065   * @throws IOException
066   * @throws SAXException
067   * @throws FileNotFoundException
068   * @throws ParserConfigurationException
069   * @throws Exception
070   */
071  public void load(String filename)
072      throws FileNotFoundException, SAXException, IOException, ParserConfigurationException {
073    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
074    DocumentBuilder builder = factory.newDocumentBuilder();
075    loadMessages(builder.parse(new CSFileInputStream(filename)));
076  }
077
078  private void loadMessages(Document doc) {
079    // TODO Auto-generated method stub
080    Element element = XMLUtil.getFirstChild(doc.getDocumentElement());
081    while (element != null) {
082      messages.put(element.getAttribute("id"), element);
083      element = XMLUtil.getNextSibling(element);
084    }
085  }
086
087  public boolean hasTranslation(String id) {
088    return messages.containsKey(id);
089  }
090
091  /**
092   * use configured language
093   * 
094   * @param id         - the id of the message to retrieve
095   * @param defaultMsg - string to use if the message is not defined or a language
096   *                   match is not found (if null, then will default to english)
097   * @return the message
098   */
099  public String getMessage(String id, String defaultMsg) {
100    return getMessage(id, lang, defaultMsg);
101  }
102
103  /**
104   * return the message in a specified language
105   * 
106   * @param id         - the id of the message to retrieve
107   * @param lang       - a language string from a browser
108   * @param defaultMsg - string to use if the message is not defined or a language
109   *                   match is not found (if null, then will default to the
110   *                   english message)
111   * @return the message
112   */
113  public String getMessage(String id, String lang, String defaultMsg) {
114    return getMessage(id, lang.split("[.;]"), defaultMsg);
115  }
116
117  private String getMessage(String id, String[] lang, String defaultMsg) {
118    Element msg = messages.get(id);
119    if (msg == null)
120      return defaultMsg;
121    for (String l : lang) {
122      String res = getByLang(msg, l);
123      if (res != null)
124        return res;
125    }
126    if (defaultMsg == null) {
127      String res = getByLang(msg, "en");
128      if (res != null)
129        return res;
130    }
131    return defaultMsg;
132  }
133
134  private String getByLang(Element msg, String lang) {
135    Element c = XMLUtil.getFirstChild(msg);
136    while (c != null) {
137      if (c.getAttribute("lang").equals(lang))
138        return c.getTextContent();
139      c = XMLUtil.getNextSibling(c);
140    }
141    return null;
142  }
143
144  // http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
145  public String getLangDesc(String s) {
146    if (s.equals("en"))
147      return "English";
148    if (s.equals("nl"))
149      return "Nederlands (Dutch)";
150    if (s.equals("de"))
151      return "Deutsch (German)";
152    if (s.equals("ru"))
153      return "\u0440\u0443\u0301\u0441\u0441\u043a\u0438\u0439 (Russian)";
154    return "\"" + s + "\"";
155  }
156
157}