1 /* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved. 2 * 3 * This program and the accompanying materials are made available under 4 * the terms of the Common Public License v1.0 which accompanies this distribution, 5 * and is available at http://www.eclipse.org/legal/cpl-v10.html 6 * 7 * $Id: IInclExclFilter.java,v 1.1.1.1 2004/05/09 16:57:33 vlad_r Exp $ 8 */ 9 package com.vladium.emma.filter; 10 11 import java.util.ArrayList; 12 import java.util.Iterator; 13 import java.util.List; 14 import java.util.StringTokenizer; 15 16 import com.vladium.util.WCMatcher; 17 18 // ---------------------------------------------------------------------------- 19 /** 20 * @author Vlad Roubtsov, 2003 21 */ 22 public 23 interface IInclExclFilter 24 { 25 // public: ................................................................ 26 27 // TODO: move this into util pkg 28 29 char INCLUSION_PREFIX = '+'; 30 String INCLUSION_PREFIX_STRING = "+"; 31 char EXCLUSION_PREFIX = '-'; 32 String EXCLUSION_PREFIX_STRING = "-"; 33 34 boolean included (final String s); 35 36 abstract class Factory 37 { 38 public static IInclExclFilter create (final String specs1, final String separators, final String [] specs2) 39 { 40 if ((specs1 == null) || (specs1.trim ().length () == 0)) 41 return create (specs2); 42 else 43 { 44 final List /* String */ _specs = new ArrayList (); 45 46 if (specs2 != null) 47 { 48 for (int s = 0; s < specs2.length; ++ s) 49 { 50 _specs.add (specs2 [s]); 51 } 52 } 53 54 for (StringTokenizer tokenizer = new StringTokenizer (specs1, separators); 55 tokenizer.hasMoreTokens (); ) 56 { 57 _specs.add (tokenizer.nextToken ()); 58 } 59 60 final String [] specs = new String [_specs.size ()]; 61 _specs.toArray (specs); 62 63 return create (specs); 64 } 65 } 66 67 public static IInclExclFilter create (final String [] specs) 68 { 69 if ((specs == null) || (specs.length == 0)) 70 return new WCInclExclFilter ((String []) null, (String []) null); 71 72 final List inclusions = new ArrayList (); 73 final List exclusions = new ArrayList (); 74 75 for (int i = 0, iLimit = specs.length; i < iLimit; ++ i) 76 { 77 final String spec = specs [i]; 78 79 if (spec.length () > 0) 80 { 81 if (spec.charAt (0) == EXCLUSION_PREFIX) 82 exclusions.add (spec.substring (1)); 83 else 84 { 85 // [inclusion prefix is optional] 86 87 if (spec.charAt (0) == INCLUSION_PREFIX) 88 inclusions.add (spec.substring (1)); 89 else 90 inclusions.add (spec); 91 } 92 } 93 } 94 95 return new WCInclExclFilter (inclusions, exclusions); 96 } 97 98 public static IInclExclFilter create (final String [] inclusions, 99 final String [] exclusions) 100 { 101 return new WCInclExclFilter (inclusions, exclusions); 102 } 103 104 public static IInclExclFilter create (final List /* String */ inclusions, 105 final List /* String */ exclusions) 106 { 107 return new WCInclExclFilter (inclusions, exclusions); 108 } 109 110 private static final class WCInclExclFilter implements IInclExclFilter 111 { 112 public boolean included (final String s) 113 { 114 if (s == null) return false; 115 116 final char [] chars = s.toCharArray (); 117 118 // included set is (inclusions - exclusions), where null inclusions 119 // mean 'everything' and null exclusions mean 'nothing': 120 121 final WCMatcher [] inclusions = m_inclusions; 122 final WCMatcher [] exclusions = m_exclusions; 123 124 if (inclusions != null) 125 { 126 boolean included = false; 127 128 for (int i = 0, iLimit = inclusions.length; i < iLimit; ++ i) 129 { 130 if (inclusions [i].matches (chars)) 131 { 132 included = true; 133 break; 134 } 135 } 136 137 if (! included) return false; 138 } 139 140 if (exclusions != null) 141 { 142 for (int x = 0, xLimit = exclusions.length; x < xLimit; ++ x) 143 { 144 if (exclusions [x].matches (chars)) return false; 145 } 146 } 147 148 return true; 149 } 150 151 152 WCInclExclFilter (final String [] inclusions, 153 final String [] exclusions) 154 { 155 if ((inclusions == null) || (inclusions.length == 0)) 156 m_inclusions = null; 157 else 158 { 159 m_inclusions = new WCMatcher [inclusions.length]; 160 161 for (int i = 0; i < inclusions.length; ++ i) 162 { 163 m_inclusions [i] = WCMatcher.compile (inclusions [i]); 164 } 165 } 166 167 if ((exclusions == null) || (exclusions.length == 0)) 168 m_exclusions = null; 169 else 170 { 171 m_exclusions = new WCMatcher [exclusions.length]; 172 173 for (int i = 0; i < exclusions.length; ++ i) 174 { 175 m_exclusions [i] = WCMatcher.compile (exclusions [i]); 176 } 177 } 178 } 179 180 WCInclExclFilter (final List /* String */ inclusions, 181 final List /* String */ exclusions) 182 { 183 if ((inclusions == null) || inclusions.isEmpty ()) 184 m_inclusions = null; 185 else 186 { 187 m_inclusions = new WCMatcher [inclusions.size ()]; 188 189 int ii = 0; 190 for (Iterator i = inclusions.iterator (); i.hasNext (); ++ ii) 191 { 192 final String pattern = (String) i.next (); 193 194 m_inclusions [ii] = WCMatcher.compile (pattern); 195 } 196 } 197 198 if ((exclusions == null) || exclusions.isEmpty ()) 199 m_exclusions = null; 200 else 201 { 202 m_exclusions = new WCMatcher [exclusions.size ()]; 203 204 int ii = 0; 205 for (Iterator i = exclusions.iterator (); i.hasNext (); ++ ii) 206 { 207 final String pattern = (String) i.next (); 208 209 m_exclusions [ii] = WCMatcher.compile (pattern); 210 } 211 } 212 } 213 214 215 private final WCMatcher [] m_inclusions, m_exclusions; 216 217 } // end of nested class 218 219 } // end of nested class 220 221 } // end of interface 222 // ----------------------------------------------------------------------------
