Current File : //proc/309157/root/home/waritko/yacy/htroot/Vocabulary_p.java
/**
* Vocabulary_p
* Copyright 2012 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
* First released 07.05.2012 at http://yacy.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program in the file lgpl21.txt
* If not, see <http://www.gnu.org/licenses/>.
*/
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import net.yacy.cora.document.id.DigestURL;
import net.yacy.cora.document.id.MultiProtocolURL;
import net.yacy.cora.federate.yacy.CacheStrategy;
import net.yacy.cora.language.synonyms.SynonymLibrary;
import net.yacy.cora.lod.vocabulary.DCTerms;
import net.yacy.cora.lod.vocabulary.Tagging;
import net.yacy.cora.lod.vocabulary.Tagging.SOTuple;
import net.yacy.cora.protocol.ClientIdentification;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.cora.util.CommonPattern;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.crawler.retrieval.StreamResponse;
import net.yacy.data.TransactionManager;
import net.yacy.data.WorkTables;
import net.yacy.document.LibraryProvider;
import net.yacy.kelondro.data.meta.URIMetadataNode;
import net.yacy.kelondro.util.FileUtils;
import net.yacy.repository.Blacklist.BlacklistType;
import net.yacy.search.Switchboard;
import net.yacy.search.SwitchboardConstants;
import net.yacy.search.index.Segment;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;
/**
* Handle creation and edition of vocabularies through the Vocabulary_p.html page.
*/
public class Vocabulary_p {
/** Logger */
private final static ConcurrentLog LOG = new ConcurrentLog(Vocabulary_p.class.getSimpleName());
public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
final Switchboard sb = (Switchboard) env;
final serverObjects prop = new serverObjects();
/* Acquire a transaction token for the next POST form submission */
final String nextToken = TransactionManager.getTransactionToken(header);
prop.put(TransactionManager.TRANSACTION_TOKEN_PARAM, nextToken);
prop.put("edit_" + TransactionManager.TRANSACTION_TOKEN_PARAM, nextToken);
prop.put("create_" + TransactionManager.TRANSACTION_TOKEN_PARAM, nextToken);
Collection<Tagging> vocs = LibraryProvider.autotagging.getVocabularies();
String vocabularyName = (post == null) ? null : post.get("vocabulary", null);
String discovername = (post == null) ? null : post.get("discovername", null);
Tagging vocabulary = vocabularyName == null ? null : LibraryProvider.autotagging.getVocabulary(vocabularyName);
if (vocabulary == null) {
vocabularyName = null;
}
if (post != null) {
// create a vocabulary
if (vocabulary == null && discovername != null && discovername.length() > 0) {
/* Check the transaction is valid */
TransactionManager.checkPostTransaction(header, post);
// get details of creation
String discoverobjectspace = post.get("discoverobjectspace", "");
MultiProtocolURL discoveruri = null;
if (discoverobjectspace.length() > 0) try {discoveruri = new MultiProtocolURL(discoverobjectspace);} catch (final MalformedURLException e) {}
if (discoveruri == null) discoverobjectspace = "";
final Map<String, Tagging.SOTuple> table = new LinkedHashMap<String, Tagging.SOTuple>();
final File propFile = LibraryProvider.autotagging.getVocabularyFile(discovername);
final boolean discoverNot = post.get("discovermethod", "").equals("none");
final boolean discoverFromPath = post.get("discovermethod", "").equals("path");
final boolean discoverFromTitle = post.get("discovermethod", "").equals("title");
final boolean discoverFromTitleSplitted = post.get("discovermethod", "").equals("titlesplitted");
final boolean discoverFromAuthor = post.get("discovermethod", "").equals("author");
final boolean discoverFromCSV = post.get("discovermethod", "").equals("csv");
final String discoverFromCSVPath = post.get("discoverpath", "").replaceAll("%20", " ");
final Segment segment = sb.index;
String t;
int csvFileStatus = 0;
if (!discoverNot) {
if (discoverFromCSV) {
if(discoverFromCSVPath.isEmpty()) {
csvFileStatus = 1;
} else {
DigestURL csvUrl = null;
if(discoverFromCSVPath.contains("://")) {
try {
csvUrl = new DigestURL(discoverFromCSVPath);
} catch(final MalformedURLException e) {
csvFileStatus = 5;
prop.put("create_csvFileStatus_csvUrl", discoverFromCSVPath);
}
} else {
final File discoverFromCSVFile = new File(discoverFromCSVPath);
final String csvPath = discoverFromCSVFile.getAbsolutePath();
if (!discoverFromCSVFile.exists()) {
csvFileStatus = 2;
prop.put("create_csvFileStatus_csvPath", csvPath);
} else if (!discoverFromCSVFile.canRead()) {
csvFileStatus = 3;
prop.put("create_csvFileStatus_csvFile", csvPath);
} else if (discoverFromCSVFile.isDirectory()) {
csvFileStatus = 4;
prop.put("create_csvFileStatus_csvPath", csvPath);
} else {
try {
csvUrl = new DigestURL(discoverFromCSVFile);
} catch(final MalformedURLException e) {
csvFileStatus = 5;
prop.put("create_csvFileStatus_csvUrl", "file://" + discoverFromCSVFile.getAbsolutePath());
}
}
}
if(csvUrl != null) {
try {
handleDiscoverFromCSV(sb, post, table, csvUrl);
} catch(final IOException e) {
LOG.warn("Could not read CSV file at " + csvUrl, e);
csvFileStatus = 3;
prop.put("create_csvFileStatus_csvFile", csvUrl.toString());
}
}
}
} else {
Iterator<DigestURL> ui = segment.urlSelector(discoveruri, Long.MAX_VALUE, 100000);
while (ui.hasNext()) {
DigestURL u = ui.next();
String u0 = u.toNormalform(true);
t = "";
if (discoverFromPath) {
int exp = u0.lastIndexOf('.');
if (exp < 0) continue;
int slp = u0.lastIndexOf('/', exp);
if (slp < 0) continue;
t = u0.substring(slp, exp);
int p;
while ((p = t.indexOf(':')) >= 0) t = t.substring(p + 1);
while ((p = t.indexOf('=')) >= 0) t = t.substring(p + 1);
}
if (discoverFromTitle || discoverFromTitleSplitted) {
URIMetadataNode m = segment.fulltext().getMetadata(u.hash());
if (m != null) t = m.dc_title();
if (t.endsWith(".jpg") || t.endsWith(".gif")) continue;
}
if (discoverFromAuthor) {
URIMetadataNode m = segment.fulltext().getMetadata(u.hash());
if (m != null) t = m.dc_creator();
}
t = t.replaceAll("_", " ").replaceAll("\"", " ").replaceAll("'", " ").replaceAll(",", " ").replaceAll(" ", " ").trim();
if (t.isEmpty()) continue;
if (discoverFromTitleSplitted) {
String[] ts = CommonPattern.SPACES.split(t);
for (String s: ts) {
if (s.isEmpty()) continue;
if (s.endsWith(".jpg") || s.endsWith(".gif")) continue;
table.put(s, new Tagging.SOTuple(Tagging.normalizeTerm(s), u0));
}
} else if (discoverFromAuthor) {
String[] ts = CommonPattern.SEMICOLON.split(t); // author names are often separated by ';'
for (String s: ts) {
if (s.isEmpty()) continue;
int p = s.indexOf(','); // check if there is a reversed method to mention the name
if (p >= 0) s = s.substring(p + 1).trim() + " " + s.substring(0, p).trim();
table.put(s, new Tagging.SOTuple(Tagging.normalizeTerm(s), u0));
}
} else {
table.put(t, new Tagging.SOTuple(Tagging.normalizeTerm(t), u0));
}
}
}
}
prop.put("create_csvFileStatus", csvFileStatus);
if(csvFileStatus == 0) {
try {
Tagging newvoc = new Tagging(discovername, propFile, discoverobjectspace, table);
prop.put("create_vocabWriteError", false);
LibraryProvider.autotagging.addVocabulary(newvoc);
vocabularyName = discovername;
vocabulary = newvoc;
// store this call as api call
sb.tables.recordAPICall(post, "Vocabulary_p.html", WorkTables.TABLE_API_TYPE_CRAWLER, "vocabulary creation for " + discovername);
} catch(final IOException e) {
prop.put("create_vocabWriteError", true);
final String vocabPath = propFile.getAbsolutePath();
prop.put("create_vocabWriteError_vocabPath", vocabPath);
LOG.severe("Could not write vocabulary file at " + vocabPath, e);
}
}
} else if (vocabulary != null && post.containsKey("set")) {
/* Check the transaction is valid */
TransactionManager.checkPostTransaction(header, post);
try {
// check if objectspace was set
vocabulary.setObjectspace(post.get("objectspace", vocabulary.getObjectspace() == null ? "" : vocabulary.getObjectspace()));
// check if a term was added
if (post.get("add_new", "").equals("checked") && post.get("newterm", "").length() > 0) {
String objectlink = post.get("newobjectlink", "");
if (objectlink.length() > 0) try {
objectlink = new MultiProtocolURL(objectlink).toNormalform(true);
} catch (final MalformedURLException e) {}
vocabulary.put(post.get("newterm", ""), post.get("newsynonyms", ""), objectlink);
}
// check if a term was modified
for (Map.Entry<String, String> e : post.entrySet()) {
if (e.getKey().startsWith("modify_") && e.getValue().equals("checked")) {
String term = e.getKey().substring(7);
String synonyms = post.get("synonyms_" + term, "");
String objectlink = post.get("objectlink_" + term, "");
vocabulary.put(term, synonyms, objectlink);
}
}
// check if the vocabulary shall be cleared
if (post.get("clear_table", "").equals("checked") ) {
vocabulary.clear();
}
// check if the vocabulary shall be deleted
if (post.get("delete_vocabulary", "").equals("checked") ) {
LibraryProvider.autotagging.deleteVocabulary(vocabularyName);
vocabulary = null;
vocabularyName = null;
}
// check if a term shall be deleted
if (vocabulary != null && vocabulary.size() > 0) for (Map.Entry<String, String> e : post.entrySet()) {
if (e.getKey().startsWith("delete_") && e.getValue().equals("checked")) {
String term = e.getKey().substring(7);
vocabulary.delete(term);
}
}
// check the isFacet and isMatchFromLinkedData properties
if (vocabulary != null && post.containsKey("set")) {
boolean isFacet = post.getBoolean("isFacet");
vocabulary.setFacet(isFacet);
Set<String> omit = env.getConfigSet("search.result.show.vocabulary.omit");
if (isFacet) {
omit.remove(vocabularyName);
} else {
omit.add(vocabularyName);
}
env.setConfig("search.result.show.vocabulary.omit", omit);
boolean isMatchFromLinkedData = post.getBoolean("vocabularies.matchLinkedData");
vocabulary.setMatchFromLinkedData(isMatchFromLinkedData);
final Set<String> matchLinkedDataVocs = env.getConfigSet(SwitchboardConstants.VOCABULARIES_MATCH_LINKED_DATA_NAMES);
if (isMatchFromLinkedData) {
matchLinkedDataVocs.add(vocabularyName);
} else {
matchLinkedDataVocs.remove(vocabularyName);
}
env.setConfig(SwitchboardConstants.VOCABULARIES_MATCH_LINKED_DATA_NAMES, matchLinkedDataVocs);
}
} catch (final IOException e) {
ConcurrentLog.logException(e);
}
}
}
int count = 0;
for (Tagging v: vocs) {
prop.put("vocabularyset_" + count + "_name", v.getName());
prop.put("vocabularyset_" + count + "_selected", ((vocabularyName != null && vocabularyName.equals(v.getName())) || (discovername != null && discovername.equals(v.getName()))) ? 1 : 0);
count++;
}
prop.put("vocabularyset", count);
prop.put("create", vocabularyName == null ? 1 : 0);
if (vocabulary == null) {
prop.put("edit", 0);
} else {
prop.put("edit", 1);
boolean editable = vocabulary.getFile() != null && vocabulary.getFile().exists();
prop.put("edit_editable", editable ? 1 : 0);
prop.putHTML("edit_editable_file", editable ? vocabulary.getFile().getAbsolutePath() : "");
prop.putHTML("edit_name", vocabulary.getName());
prop.putXML("edit_namexml", vocabulary.getName());
prop.putHTML("edit_namespace", vocabulary.getNamespace());
prop.put("edit_isFacet", vocabulary.isFacet() ? 1 : 0);
prop.put("edit_vocabularies.matchLinkedData", vocabulary.isMatchFromLinkedData());
prop.put("edit_size", vocabulary.size());
prop.putHTML("edit_predicate", vocabulary.getPredicate());
prop.putHTML("edit_prefix", Tagging.DEFAULT_PREFIX);
prop.putHTML("edit_editable_objectspace", vocabulary.getObjectspace() == null ? "" : vocabulary.getObjectspace());
prop.putHTML("edit_editable_objectspacepredicate", DCTerms.references.getPredicate());
int c = 0;
boolean dark = false;
int osl = vocabulary.getObjectspace() == null ? 0 : vocabulary.getObjectspace().length();
Map<String, SOTuple> list = vocabulary.list();
prop.put("edit_size", list.size());
for (Map.Entry<String, SOTuple> entry: list.entrySet()) {
prop.put("edit_terms_" + c + "_editable", editable ? 1 : 0);
prop.put("edit_terms_" + c + "_dark", dark ? 1 : 0); dark = !dark;
prop.putXML("edit_terms_" + c + "_label", osl > entry.getValue().getObjectlink().length() ? entry.getKey() : entry.getValue().getObjectlink().substring(osl));
prop.putHTML("edit_terms_" + c + "_term", entry.getKey());
prop.putXML("edit_terms_" + c + "_termxml", entry.getKey());
prop.putHTML("edit_terms_" + c + "_editable_term", entry.getKey());
String synonymss = entry.getValue().getSynonymsCSV();
prop.putHTML("edit_terms_" + c + "_editable_synonyms", synonymss);
if (synonymss.length() > 0) {
String[] synonymsa = entry.getValue().getSynonymsList();
for (int i = 0; i < synonymsa.length; i++) {
prop.put("edit_terms_" + c + "_synonyms_" + i + "_altLabel", synonymsa[i]);
}
prop.put("edit_terms_" + c + "_synonyms", synonymsa.length);
} else {
prop.put("edit_terms_" + c + "_synonyms", 0);
}
prop.putXML("edit_terms_" + c + "_editable_objectlink", entry.getValue().getObjectlink());
c++;
if (c > 3000) break;
}
prop.put("edit_terms", c);
}
// make charset list for import method selector
prop.putHTML("create_charset_" + 0 + "_name", "autodetect");
prop.put("create_charset_" + 0 + "_selected", 1);
int c = 1;
for (String cs: Charset.availableCharsets().keySet()) {
prop.putHTML("create_charset_" + c + "_name", cs);
prop.put("create_charset_" + c + "_selected", 0);
c++;
}
prop.put("create_charset", c);
// return rewrite properties
return prop;
}
/**
* Parse a CSV content line and extract field values. When the last field of
* this line starts with and unclosed escape character, the current line is
* appended to the escapedContent buffer.
*
* @param line
* a raw line from a CSV document. Must not be null.
* @param separatorPattern
* the field separator character compiled as a Pattern instance. Must
* not be null.
* @param escape
* escape character
* @param multiLineContent
* eventually holds content of previous lines whose last field
* includes an escaped line separator
* @return the list of field values extracted from the line, eventually empty.
*/
private static List<String> parseCSVLine(final String line, final Pattern separatorPattern, final String escape, final StringBuilder multiLineContent) {
final List<String> fields = new ArrayList<>();
String[] tokens = separatorPattern.split(line);
if (tokens.length == 0) {
tokens = new String[]{line};
}
/* Handle continuation of multi-lines field content escaped between escape char */
if(multiLineContent.length() > 0) {
int closingEscapeIndex = -1;
for(int index = 0; index < tokens.length; index++) {
if(tokens[index].endsWith(escape)) {
closingEscapeIndex = index;
break;
}
}
if(closingEscapeIndex >= 0) {
/* End of multi-line escape */
multiLineContent.append("\n").append(line);
tokens = separatorPattern.split(multiLineContent.toString());
multiLineContent.setLength(0);
if (tokens.length == 0) {
tokens = new String[]{line};
}
} else {
/* Multi-line escape continue */
multiLineContent.append("\n").append(line);
return fields;
}
}
/* Handle separator char escaped between escape char */
final StringBuilder escapedSeparatorContent = new StringBuilder();
for(final String field : tokens) {
if(escapedSeparatorContent.length() == 0) {
if(field.startsWith(escape) && !field.endsWith(escape)) {
/* Beginning of escape */
escapedSeparatorContent.append(field).append(separatorPattern.toString());
continue;
}
} else if(field.endsWith(escape)) {
/* End of field escape */
escapedSeparatorContent.append(field);
fields.add(escapedSeparatorContent.toString());
escapedSeparatorContent.setLength(0);
continue;
} else {
/* Escape continue */
escapedSeparatorContent.append(field).append(separatorPattern.toString());
continue;
}
fields.add(field);
}
if(escapedSeparatorContent.length() > 0) {
/* Handle beginning of field content with escaped line separator */
multiLineContent.setLength(0);
multiLineContent.append(line);
}
return fields;
}
/**
* Fill the vocabulary table from a CSV file.
* @param sb the main Switchbaord instance. Must not be null.
* @param post current request parameters. Must not be null.
* @param table the vocabulary table to fill. Must not be null.
* @param csvFileUrl the file URL. Must not be null.
* @throws IOException when a read/write error occurred
* @throws UnsupportedEncodingException
* @throws FileNotFoundException when the file does not exists or can not be read for some reason.
*/
protected static void handleDiscoverFromCSV(final Switchboard sb, final serverObjects post, final Map<String, Tagging.SOTuple> table,
final DigestURL csvFileUrl)
throws IOException, UnsupportedEncodingException, FileNotFoundException {
String charsetName = post.get("charset", StandardCharsets.UTF_8.name());
final String columnSeparator = post.get("columnSeparator", ";");
final String escapeChar = "\"";
final int lineStart = post.getInt("discoverLineStart", 0);
final int discovercolumnliteral = post.getInt("discovercolumnliteral", 0);
final int discovercolumnsynonyms = post.getInt("discovercolumnsynonyms", -1);
final int discovercolumnobjectlink = post.getInt("discovercolumnobjectlink", -1);
final boolean discoverenrichsynonyms = post.get("discoversynonymsmethod", "none").equals("enrichsynonyms");
final boolean discoverreadcolumn = post.get("discoversynonymsmethod", "none").equals("readcolumn");
final Pattern separatorPattern = Pattern.compile(columnSeparator);
// auto-detect charset, used code from http://jchardet.sourceforge.net/; see also: http://www-archive.mozilla.org/projects/intl/chardet.html
if (charsetName.equals("autodetect")) {
try (final StreamResponse streamResponse = sb.loader.openInputStream(
sb.loader.request(csvFileUrl, true, false), CacheStrategy.IFFRESH, BlacklistType.CRAWLER,
ClientIdentification.yacyInternetCrawlerAgent, Integer.MAX_VALUE);) {
if(streamResponse == null || streamResponse.getContentStream() == null) {
throw new IOException("Could not get CSV content at " + csvFileUrl);
}
charsetName = streamResponse.getResponse().getCharacterEncoding();
if(charsetName == null) {
/* Charset not provided in response headers : try to detect it from content */
final List<String> charsets = FileUtils.detectCharset(streamResponse.getContentStream());
charsetName = charsets.get(0);
LOG.info("detected charset: " + charsetName + " used to read " + csvFileUrl.toString());
} else {
LOG.info("detected charset: " + charsetName + " used to read " + csvFileUrl.toString());
/* Use now the open stream */
try (final InputStreamReader reader = new InputStreamReader(streamResponse.getContentStream(), charsetName);
final BufferedReader bufferedReader = new BufferedReader(reader);) {
discoverFromCSVReader(table, escapeChar, lineStart, discovercolumnliteral, discovercolumnsynonyms,
discovercolumnobjectlink, discoverenrichsynonyms, discoverreadcolumn, separatorPattern,
bufferedReader);
}
return;
}
}
}
// when autodetection of content charset has been selected, a remote resource may opened again, but has some chances to be now in cache
try(final StreamResponse streamResponse = sb.loader.openInputStream(
sb.loader.request(csvFileUrl, true, false), CacheStrategy.IFFRESH, BlacklistType.CRAWLER,
ClientIdentification.yacyInternetCrawlerAgent, Integer.MAX_VALUE);) {
if(streamResponse == null || streamResponse.getContentStream() == null) {
throw new IOException("Could not get CSV content at " + csvFileUrl);
}
try (final InputStreamReader reader = new InputStreamReader(streamResponse.getContentStream(), charsetName);
final BufferedReader bufferedReader = new BufferedReader(reader);) {
discoverFromCSVReader(table, escapeChar, lineStart, discovercolumnliteral, discovercolumnsynonyms,
discovercolumnobjectlink, discoverenrichsynonyms, discoverreadcolumn, separatorPattern,
bufferedReader);
}
}
}
/**
* Fill the vocabulary table from reader open on CSV content.
* @param table the vocabulary table to fill. Must not be null.
* @param escapeChar CSV escape character (standard is double quote). Must not be null.
* @param lineStart index (zero based) of the first line to parse. Previous lines are ignored.
* @param literalsColumn index (zero based) of the column to read for literals
* @param synonymsColumn index (zero based) of the column to read for synonyms. Set to -1 to ignore.
* @param discovercolumnobjectlink
* @param discoverenrichsynonyms
* @param readSynonymFromColumn when true synonym terms are read from the column at synonymsColumn index
* @param separatorPattern the field separator character compiled as a Pattern instance. Must not be null.
* @param reader an open reader on CSV content. Must not be null.
* @throws IOException when an read error occurred
*/
protected static void discoverFromCSVReader(final Map<String, Tagging.SOTuple> table, final String escapeChar,
final int lineStart, final int literalsColumn, final int synonymsColumn,
final int discovercolumnobjectlink, final boolean discoverenrichsynonyms, final boolean readSynonymFromColumn,
final Pattern separatorPattern, final BufferedReader reader) throws IOException {
String line = null;
final StringBuilder multiLineContent = new StringBuilder();
final Map<String, String> synonym2literal = new HashMap<>(); // helper map to check if there are double synonyms
int lineIndex = -1;
while ((line = reader.readLine()) != null) {
lineIndex++;
if(lineIndex < lineStart) {
continue;
}
if (line.length() == 0) {
continue;
}
final List<String> fields = parseCSVLine(line, separatorPattern, escapeChar, multiLineContent);
if (multiLineContent.length() > 0) {
continue;
}
String literal = literalsColumn < 0 || fields.size() <= literalsColumn ? null : fields.get(literalsColumn).trim();
if (literal == null) {
continue;
}
literal = normalizeLiteral(literal, escapeChar);
final String objectlink = discovercolumnobjectlink < 0 || fields.size() <= discovercolumnobjectlink ? null : fields.get(discovercolumnobjectlink).trim();
if (literal.length() > 0) {
String synonyms = "";
if (discoverenrichsynonyms) {
final Set<String> sy = SynonymLibrary.getSynonyms(literal);
if (sy != null) {
for (final String s: sy) {
synonyms += "," + s;
}
}
} else if (readSynonymFromColumn) {
synonyms = synonymsColumn < 0 || fields.size() <= synonymsColumn ? null : fields.get(synonymsColumn).trim();
synonyms = normalizeLiteral(synonyms, escapeChar);
} else {
synonyms = Tagging.normalizeTerm(literal);
}
// check double synonyms
if (synonyms.length() > 0) {
String oldliteral = synonym2literal.get(synonyms);
if (oldliteral != null && !literal.equals(oldliteral)) {
// replace old entry with combined new
table.remove(oldliteral);
String newliteral = oldliteral + "," + literal;
literal = newliteral;
}
synonym2literal.put(synonyms, literal);
}
// store term
table.put(literal, new Tagging.SOTuple(synonyms, objectlink == null ? "" : objectlink));
}
}
}
private static String normalizeLiteral(String literal, final String escapeChar) {
if (literal == null) {
return "";
}
if(literal.length() > 1 && literal.startsWith(escapeChar) && literal.endsWith(escapeChar)) {
literal = literal.replace("\"\"", "\"");
}
if (literal.length() > 0 && (literal.charAt(0) == '"' || literal.charAt(0) == '\'')) {
literal = literal.substring(1);
}
if (literal.length() > 0 && (literal.charAt(literal.length() - 1) == '"' || literal.charAt(literal.length() - 1) == '\'')) {
literal = literal.substring(0, literal.length() - 1);
}
return literal;
}
}
Mini Shell