org.languagetool.tokenizers.en.EnglishWordTokenizer Maven / Gradle / Ivy
/* LanguageTool, a natural language style checker
* Copyright (C) 2013 Marcin Milkowski (http://www.languagetool.org)
*
* 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA
*/
package org.languagetool.tokenizers.en;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import org.languagetool.tokenizers.WordTokenizer;
/**
* @author Marcin Milkowski
* @since 2.5
*/
public class EnglishWordTokenizer extends WordTokenizer {
public EnglishWordTokenizer() {
}
@Override
public String getTokenizingCharacters() {
return super.getTokenizingCharacters() + "–"; // n-dash
}
/**
* Tokenizes text.
* The English tokenizer differs from the standard one
* in two respects:
*
* - it does not treat the hyphen as part of the
* word if the hyphen is at the end of the word;
* - it includes n-dash as a tokenizing character,
* as it is used without a whitespace in English.
*
* @param text String of words to tokenize.
*/
@Override
public List tokenize(String text) {
List l = new ArrayList<>();
StringTokenizer st = new StringTokenizer(text, getTokenizingCharacters(), true);
while (st.hasMoreElements()) {
String token = st.nextToken();
if (token.length() > 1 && token.endsWith("-")) {
l.add(token.substring(0, token.length() - 1));
l.add("-");
} else {
l.add(token);
}
}
return joinEMailsAndUrls(l);
}
}