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/* LanguageTool, a natural language style checker
* Copyright (C) 2010 Marcin Miłkowski (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 de.danielnaber.languagetool.rules.bitext;
import java.io.IOException;
import de.danielnaber.languagetool.AnalyzedSentence;
import de.danielnaber.languagetool.AnalyzedTokenReadings;
import de.danielnaber.languagetool.rules.RuleMatch;
/**
* Checks if the translation has a really different length than the source
* (smaller than 30% or longer by 250%).
*
* @author Marcin Miłkowski
*
*/
public class DifferentLengthRule extends BitextRule {
static final String MSG = "Source and target translation lengths are very different!";
@Override
public String getDescription() {
return "Check if translation length is similar to source length";
}
@Override
public String getId() {
return "TRANSLATION_LENGTH";
}
public String getMessage() {
return MSG;
}
/**
* This method makes no sense for bitext, return null??
*/
@Override
public RuleMatch[] match(AnalyzedSentence text) throws IOException {
// TODO Auto-generated method stub
return null;
}
@Override
public RuleMatch[] match(AnalyzedSentence sourceText,
AnalyzedSentence targetText) throws IOException {
if (isLengthDifferent(
getPureText(sourceText), getPureText(targetText))) {
final RuleMatch[] rm = new RuleMatch[1];
final AnalyzedTokenReadings[] tokens = targetText.getTokens();
final int len = tokens[tokens.length - 1].getStartPos() + tokens[tokens.length - 1].getToken().length();
rm[0] = new RuleMatch(this, 1, len,
MSG);
return rm;
}
return new RuleMatch[0];
}
static boolean isLengthDifferent(final String src, final String trg) {
final double skew = (((double) src.length() / (double) trg.length()) * 100.00);
return (skew > 250 || skew < 30);
}
private static String getPureText(AnalyzedSentence text) {
final StringBuilder sb = new StringBuilder();
for (AnalyzedTokenReadings token : text.getTokens()) {
sb.append(token.getToken());
}
return sb.toString();
}
public void reset() {
}
}
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