/* * 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<TokenQueue> { 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; } }