001/* 002 * Sonar, open source software quality management tool. 003 * Copyright (C) 2008-2012 SonarSource 004 * mailto:contact AT sonarsource DOT com 005 * 006 * Sonar 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 * Sonar 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 017 * License along with Sonar; if not, write to the Free Software 018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02 019 */ 020package org.sonar.plugins.core.timemachine.tracking; 021 022import com.google.common.collect.Lists; 023 024import java.util.List; 025 026/** 027 * Text is a {@link Sequence} of lines. 028 */ 029public class StringText implements Sequence { 030 031 final String content; 032 033 /** 034 * Map of line number to starting position within {@link #content}. 035 */ 036 final List<Integer> lines; 037 038 public StringText(String str) { 039 this.content = str; 040 this.lines = lineMap(content, 0, content.length()); 041 } 042 043 public int length() { 044 return lines.size() - 2; 045 } 046 047 private static List<Integer> lineMap(String buf, int ptr, int end) { 048 List<Integer> lines = Lists.newArrayList(); 049 lines.add(Integer.MIN_VALUE); 050 for (; ptr < end; ptr = nextLF(buf, ptr)) { 051 lines.add(ptr); 052 } 053 lines.add(end); 054 return lines; 055 } 056 057 private static int nextLF(String b, int ptr) { 058 return next(b, ptr, '\n'); 059 } 060 061 private static int next(final String b, int ptr, final char chrA) { 062 final int sz = b.length(); 063 while (ptr < sz) { 064 if (b.charAt(ptr++) == chrA) { 065 return ptr; 066 } 067 } 068 return ptr; 069 } 070 071}