001 /* 002 * Sonar, open source software quality management tool. 003 * Copyright (C) 2008-2011 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 */ 020 021 package org.sonar.squid.recognizer; 022 023 public abstract class Detector { 024 025 public final double probability; 026 027 public Detector(double probability) { 028 if (probability < 0 || probability > 1) { 029 throw new IllegalArgumentException("probability should be between [0 .. 1]"); 030 } 031 this.probability = probability; 032 } 033 034 public abstract int scan(String line); 035 036 public final double recognition(String line) { 037 int matchers = scan(line); 038 if (matchers == 0) { 039 return 0; 040 } 041 return 1 - Math.pow(1 - probability, scan(line)); 042 } 043 }