package org.codehaus.plexus.util;
   
   /*
    * Copyright The Codehaus Foundation.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.StringTokenizer;
  
  /**
   * <p>Describes a match target for SelectorUtils.</p>
   *
   * <p>Significantly more efficient than using strings, since re-evaluation and re-tokenizing is avoided.</p>
   *
   * @author Kristian Rosenvold
   */
  public class MatchPattern {
      private final String source;
  
      private final String regexPattern;
  
      private final String separator;
  
      private final String[] tokenized;
  
      private final char[][] tokenizedChar;
  
      private MatchPattern(String source, String separator) {
          regexPattern = SelectorUtils.isRegexPrefixedPattern(source)
                  ? source.substring(
                          SelectorUtils.REGEX_HANDLER_PREFIX.length(),
                          source.length() - SelectorUtils.PATTERN_HANDLER_SUFFIX.length())
                  : null;
          this.source = SelectorUtils.isAntPrefixedPattern(source)
                  ? source.substring(
                          SelectorUtils.ANT_HANDLER_PREFIX.length(),
                          source.length() - SelectorUtils.PATTERN_HANDLER_SUFFIX.length())
                  : source;
          this.separator = separator;
          tokenized = tokenizePathToString(this.source, separator);
          tokenizedChar = new char[tokenized.length][];
          for (int i = 0; i < tokenized.length; i++) {
              tokenizedChar[i] = tokenized[i].toCharArray();
          }
      }
  
      /**
       * Gets the source pattern for this match pattern.
       * @return the source string without Ant or Regex pattern markers.
       */
      public String getSource() {
          return regexPattern == null ? source : regexPattern;
      }
  
      public boolean matchPath(String str, boolean isCaseSensitive) {
          if (regexPattern != null) {
              return str.matches(regexPattern);
          } else {
              return SelectorUtils.matchAntPathPattern(this, str, separator, isCaseSensitive);
          }
      }
  
      boolean matchPath(String str, char[][] strDirs, boolean isCaseSensitive) {
          if (regexPattern != null) {
              return str.matches(regexPattern);
          } else {
              return SelectorUtils.matchAntPathPattern(getTokenizedPathChars(), strDirs, isCaseSensitive);
          }
      }
  
      public boolean matchPatternStart(String str, boolean isCaseSensitive) {
          if (regexPattern != null) {
              // FIXME: ICK! But we can't do partial matches for regex, so we have to reserve judgement until we have
              // a file to deal with, or we can definitely say this is an exclusion...
              return true;
          } else {
              String altStr = str.replace('\\', '/');
  
              return SelectorUtils.matchAntPathPatternStart(this, str, File.separator, isCaseSensitive)
                      || SelectorUtils.matchAntPathPatternStart(this, altStr, "/", isCaseSensitive);
          }
      }
  
      public String[] getTokenizedPathString() {
          return tokenized;
     }
 
     public char[][] getTokenizedPathChars() {
         return tokenizedChar;
     }
 
     public boolean startsWith(String string) {
         return source.startsWith(string);
     }
 
     public static String[] tokenizePathToString(String path, String separator) {
         List<String> ret = new ArrayList<String>();
         StringTokenizer st = new StringTokenizer(path, separator);
         while (st.hasMoreTokens()) {
             ret.add(st.nextToken());
         }
         return ret.toArray(new String[0]);
     }
 
     static char[][] tokenizePathToCharArray(String path, String separator) {
         String[] tokenizedName = tokenizePathToString(path, separator);
         char[][] tokenizedNameChar = new char[tokenizedName.length][];
         for (int i = 0; i < tokenizedName.length; i++) {
             tokenizedNameChar[i] = tokenizedName[i].toCharArray();
         }
         return tokenizedNameChar;
     }
 
     public static MatchPattern fromString(String source) {
         return new MatchPattern(source, File.separator);
     }
 }