org.sonar.duplications.token.TokenChannel Maven / Gradle / Ivy
/*
* SonarQube
* Copyright (C) 2009-2017 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program 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 3 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.duplications.token;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.sonar.channel.Channel;
import org.sonar.channel.CodeBuffer.Cursor;
import org.sonar.channel.CodeReader;
class TokenChannel extends Channel {
private final StringBuilder tmpBuilder = new StringBuilder();
private final Matcher matcher;
private String normalizationValue;
public TokenChannel(String regex) {
matcher = Pattern.compile(regex).matcher("");
}
public TokenChannel(String regex, String normalizationValue) {
this(regex);
this.normalizationValue = normalizationValue;
}
@Override
public boolean consume(CodeReader code, TokenQueue output) {
if (code.popTo(matcher, tmpBuilder) > 0) {
// see SONAR-2499
Cursor previousCursor = code.getPreviousCursor();
if (normalizationValue != null) {
output.add(new Token(normalizationValue, previousCursor.getLine(), previousCursor.getColumn()));
} else {
output.add(new Token(tmpBuilder.toString(), previousCursor.getLine(), previousCursor.getColumn()));
}
// Godin: note that other channels use method delete in order to do the same thing
tmpBuilder.setLength(0);
return true;
}
return false;
}
}