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// TranslatorXliff.java
// -------------------------------------
// part of YACY
// (C) by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004
//
// This file ist contributed by Burkhard Buelte
// last major change: 2016-03-28
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package net.yacy.utils.translation;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.nio.charset.StandardCharsets;
import java.util.LinkedHashMap;
import java.util.Locale;
import java.util.Map;
import java.util.TreeMap;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.data.Translator;
import net.yacy.search.Switchboard;
/**
* Wordlist based translator
*
* Translator which can read and write translation lists from a
* <a href="http://docs.oasis-open.org/xliff/v1.2/os/xliff-core.html">XLIFF 1.2</a>
* file with phrases or single words to translate a string or a file.
*
* On loading of translation files loaded data is merged with local (modified or downloaded)
* translation data in DATA/LOCALE/
*/
public class TranslatorXliff extends Translator {
/**
* Load translationLists for one language from a Xliff File.
*
* @param translationFile the File, which contains the Lists
* @return a HashMap, which contains for each File a HashMap with
* translations.
*/
public Map<String, Map<String, String>> loadTranslationsListsFromXliff(final File xliffFile) {
final Map<String, Map<String, String>> lngLists = new TreeMap<String, Map<String, String>>(); //list of translationLists for different files.
/**
* read xliff xml file into a xliff object
* <xliff>
* <file original="filename">
* <body>
* <trans-unit>
* <source>text</source>
* <target>text</target>
* </trans-unit>
* <trans-unit>....
* </body>
* </file>
* <file>.....
* </xliff>
*/
try (FileInputStream fis = new FileInputStream(xliffFile)) { // try-with-resource to close inputstream
XMLInputFactory factory = XMLInputFactory.newInstance();
XMLStreamReader xmlreader = factory.createXMLStreamReader(fis);
Map<String, String> translationList = null; //current Translation Table (maintaining input order)
String source = null;
String target = null;
String state = null;
while (xmlreader.hasNext()) {
int eventtype = xmlreader.next();
if (eventtype == START_ELEMENT) {
String ename = xmlreader.getLocalName();
// setup for 'file' section (get or add translationlist for this file)
if (ename.equalsIgnoreCase("file")) {
String forFile = xmlreader.getAttributeValue(null, "original");
if (lngLists.containsKey(forFile)) {
translationList = lngLists.get(forFile);
} else {
translationList = new LinkedHashMap<String, String>(); //current Translation Table (maintaining input order)
lngLists.put(forFile, translationList);
}
source = null;
target = null;
} else if (ename.equalsIgnoreCase("trans-unit")) { // prepare for trans-unit
source = null;
target = null;
} else if (ename.equalsIgnoreCase("source")) { // get source text
source = xmlreader.getElementText();
} else if (ename.equalsIgnoreCase("target")) { // get target text
state = xmlreader.getAttributeValue(null, "state");
target = xmlreader.getElementText(); // TODO: in full blown xliff, target may contain sub-xml elements (but we use only text)
}
} else if (eventtype == END_ELEMENT) {
String ename = xmlreader.getLocalName();
// store source/target on finish of trans-unit
if (ename.equalsIgnoreCase("trans-unit") && translationList != null) {
if (source != null) {
if (target != null) {
if ("translated".equals(state)) {
translationList.put(source, target);
} else {
translationList.put(source, null);
}
} else {
translationList.put(source, null);
}
source = null;
}
target = null;
}
// on file end-tag make sure nothing is added (on error in xml)
if (ename.equalsIgnoreCase("file")) {
translationList = null;
}
}
}
xmlreader.close();
} catch (IOException | XMLStreamException ex) {
ConcurrentLog.warn("TRANSLATOR", "error reading " + xliffFile.getAbsolutePath() + " -> " + ex.getMessage());
}
return lngLists;
}
/**
* Maps (overrides) Translator.loadTranslationsLists to read from xliff file
* if file extension is .xlf or .xliff (otherwise load xx.lng file).
* Additionally if localy modified translation exists in DATA/LOCALE content
* is merged into given translation.
*
* @param xliffFile
* @return translation map
*/
@Override
public Map<String, Map<String, String>> loadTranslationsLists(final File xliffFile) {
File locallng = getScratchFile(xliffFile);
if (xliffFile.getName().toLowerCase(Locale.ROOT).endsWith(".xlf") || xliffFile.getName().toLowerCase(Locale.ROOT).endsWith(".xliff")) {
if (locallng.exists()) {
Map<String, Map<String, String>> mergedList = loadTranslationsListsFromXliff(xliffFile);
Map<String, Map<String, String>> tmplist = loadTranslationsListsFromXliff(locallng);
return mergeTranslationLists(mergedList, tmplist);
}
return loadTranslationsListsFromXliff(xliffFile);
} else if (locallng.exists()) {
Map<String, Map<String, String>> mergedList = super.loadTranslationsLists(xliffFile);
Map<String, Map<String, String>> tmplist = super.loadTranslationsLists(locallng);
return mergeTranslationLists(mergedList, tmplist);
} else {
return super.loadTranslationsLists(xliffFile);
}
}
/**
* Merges translations, values from localTrans overwrite entries in masterTrans.
*
* @param masterTrans master translation
* @param localTrans translation to be merged to master
* @return resulting map with all entries from master and localTrans
*/
protected Map<String, Map<String, String>> mergeTranslationLists(Map<String, Map<String, String>> masterTrans, Map<String, Map<String, String>> localTrans) {
if (localTrans != null && !localTrans.isEmpty()) {
for (String transfilename : localTrans.keySet()) { // get translation filename
Map<String, String> origList = localTrans.get(transfilename);
if (masterTrans.containsKey(transfilename)) {
Map<String, String> xliffList = masterTrans.get(transfilename);
xliffList.putAll(origList);
} else {
masterTrans.put(transfilename, origList);
}
}
}
return masterTrans;
}
/**
* Saves the internal translation map as XLIFF 1.2 file
*
* @param targetLanguage the target language code, if null target is omitted
* in output file and only source text stored
* @param xliffFile name of the output XLIFF file (typically with .xlf
* extension)
* @param lng the YaCy translation for one language
*
* @return true on success
*/
public boolean saveAsXliff(final String targetLanguageCode, File xliffFile, Map<String, Map<String, String>> lng) {
final String sourceLanguage = "en"; // source language is always English
try (
/* Resources automatically closed by this try-with-resources statement */
final FileOutputStream fileOutStream = new FileOutputStream(xliffFile);
final OutputStreamWriter output = new OutputStreamWriter(fileOutStream, StandardCharsets.UTF_8.name());
) {
output.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
output.write("<xliff version='1.2' xmlns='urn:oasis:names:tc:xliff:document:1.2'> \n");
for (String afilemap : lng.keySet()) {
output.write("<file original=\"" + afilemap + "\" " // original required in xliff 1.2
+ " source-language=\"" + sourceLanguage + "\" "); // required in xliff 1.2
if (targetLanguageCode != null && !targetLanguageCode.isEmpty()) {
output.write(" target-language=\"" + targetLanguageCode + "\" "); // required in xliff 1.2
}
output.write(" datatype=\"html\">\n"); // required in xliff 1.2
output.write(" <body>\n");
Map<String, String> txtmap = lng.get(afilemap);
for (String source : txtmap.keySet()) {
String target = txtmap.get(source);
// we use hashCode of source string to get same id in different xliff files for same translation text
output.write(" <trans-unit id=\"" + Integer.toHexString(source.hashCode()) + "\" xml:space=\"preserve\" approved=\"no\"");
if (target == null || target.isEmpty()) { // omitt target text if not available
output.write(" translate=\"yes\">\n");
output.write(" <source>" + toXmlStr(source) + "</source>\n");
} else {
output.write(">\n");
output.write(" <source>" + toXmlStr(source) + "</source>\n");
output.write(" <target" + (target.equals(source) ? "" : " state='translated'") + ">" + toXmlStr(target) + "</target>\n");
}
output.write(" </trans-unit>\n");
}
output.write(" </body>\n");
output.write("</file>\n\n");
}
output.write("</xliff>\n");
} catch (Exception e) {
return false;
}
return true;
}
/**
* Helper to write translation entries for one file
*
* @param filename relative path file name
* @param textlist the translation list for filename
* @param output output file
* @throws IOException
*/
private void writeFileSection(final String filename, final Map<String, String> textlist, OutputStreamWriter output) throws IOException {
if (!filename.isEmpty()) {
output.write("#File: " + filename + "\n"
+ "#---------------------------\n");
for (String source : textlist.keySet()) {
String target = textlist.get(source);
if (target != null && !target.isEmpty()) { // omitt target text if not available
if (source.equals(target)) {
output.write("#" + source + "==" + target + "\n"); // no translation needed (mark #)
} else {
output.write(source + "==" + target + "\n");
}
} else {
output.write("#" + source + "==" + source + "\n"); // no translation available (mark #)
}
}
output.write("#-----------------------------\n\n");
}
}
/**
* Saves the internal translation map as XLIFF 1.2 file
*
* @param targetLanguage the target language code, if null target is omitted
* in output file and only source text stored
* @param xliffFile name of the output XLIFF file (typically with .xlf
* extension)
* @param lng the YaCy translation for one language
*
* @return true on success
*/
public boolean saveAsLngFile(final String targetLanguageCode, File lngFile, Map<String, Map<String, String>> lng) {
try (
/* Resources automatically closed by this try-with-resources statement */
final FileOutputStream fileOutStream = new FileOutputStream(lngFile);
final OutputStreamWriter output = new OutputStreamWriter(fileOutStream, StandardCharsets.UTF_8.name());
) {
output.write("# " + (targetLanguageCode == null ? "master" : targetLanguageCode) + ".lng\n");
output.write("# -----------------------\n");
output.write("# This is a part of YaCy, a peer-to-peer based web search engine\n\n");
output.write("# Each translation list starts with #File: relative/path/to/file\n");
output.write("# followed by the translations OriginalText==TranslatedText (in one line)\n");
output.write("# Comment lines or not translated lines start with #\n\n");
// special handling of "ConfigLanguage_p.html" to list on top of all other
// because of some important identifier
Map<String, String> txtmap = lng.get("ConfigLanguage_p.html");
if (txtmap != null) writeFileSection("ConfigLanguage_p.html", txtmap, output);
for (String afilemap : lng.keySet()) {
txtmap = lng.get(afilemap);
if (!"ConfigLanguage_p.html".equals(afilemap)) {
writeFileSection(afilemap, txtmap, output);
}
}
output.write("# EOF");
} catch (Exception e) {
return false;
}
return true;
}
/**
* Helper to make valid xml content text as text may contain html markup
* (the reverse on read is done automatically)
* @param html input string
* @return xml string
*/
private String toXmlStr(String s) {
int control = s.indexOf("&");
while (control >= 0) {
s = s.substring(0, control) + "&" + s.substring(control + 1);
if (control < s.length()) {
control++;
}
control = s.indexOf("&", control);
}
control = s.indexOf("<");
while (control >= 0) {
s = s.substring(0, control) + "<" + s.substring(control + 1);
if (control < s.length()) {
control++;
}
control = s.indexOf("<", control);
}
control = s.indexOf(">");
while (control >= 0) {
s = s.substring(0, control) + ">" + s.substring(control + 1);
if (control < s.length()) {
control++;
}
control = s.indexOf(">", control);
}
return s;
}
/**
* Get the path to a work/scratch file in the DATA/LOCALE directory with the
* same name as given in the langPath
*
* @param langFile the path with filename to the language file
* @return a path to DATA/LOCALE/langFile.filename()
*/
public File getScratchFile(final File langFile) {
if (Switchboard.getSwitchboard() != null) { // for debug and testing were switchboard is null
File f = Switchboard.getSwitchboard().getDataPath("locale.translated_html", "DATA/LOCALE");
return new File(f.getParentFile(), langFile.getName());
}
return langFile;
}
}
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