001/*
002 * SonarQube
003 * Copyright (C) 2009-2017 SonarSource SA
004 * mailto:info AT sonarsource DOT com
005 *
006 * This program is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * This program is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public License
017 * along with this program; if not, write to the Free Software Foundation,
018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
019 */
020package org.sonar.api.batch.fs.internal.charhandler;
021
022public class LineOffsetCounter extends CharHandler {
023  private long currentOriginalOffset = 0;
024  private IntArrayList originalLineOffsets = new IntArrayList();
025  private long lastValidOffset = 0;
026
027  public LineOffsetCounter() {
028    originalLineOffsets.add(0);
029  }
030
031  @Override
032  public void handleAll(char c) {
033    currentOriginalOffset++;
034  }
035
036  @Override
037  public void newLine() {
038    if (currentOriginalOffset > Integer.MAX_VALUE) {
039      throw new IllegalStateException("File is too big: " + currentOriginalOffset);
040    }
041    originalLineOffsets.add((int) currentOriginalOffset);
042  }
043
044  @Override
045  public void eof() {
046    lastValidOffset = currentOriginalOffset;
047  }
048
049  public int[] getOriginalLineOffsets() {
050    return originalLineOffsets.trimAndGet();
051  }
052
053  public int getLastValidOffset() {
054    if (lastValidOffset > Integer.MAX_VALUE) {
055      throw new IllegalStateException("File is too big: " + lastValidOffset);
056    }
057    return (int) lastValidOffset;
058  }
059
060}