package org.apache.maven.shared.utils.io;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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;
  import java.util.regex.Pattern;
  
  import javax.annotation.Nonnull;
  
  /**
   * Describes a match target for SelectorUtils.
   * <p/>
   * Significantly more efficient than using strings, since re-evaluation and re-tokenizing is avoided.
   *
   * @author Kristian Rosenvold
   */
  public class MatchPattern
  {
      private final String source;
  
      private final String regexPattern;
  
      private final Pattern regexPatternRegex;
  
      private final String separator;
  
      private final String[] tokenized;
  
      private MatchPattern( @Nonnull String source, @Nonnull String separator )
      {
          regexPattern = SelectorUtils.isRegexPrefixedPattern( source ) ? source.substring(
              SelectorUtils.REGEX_HANDLER_PREFIX.length(),
              source.length() - SelectorUtils.PATTERN_HANDLER_SUFFIX.length() ) : null;
          regexPatternRegex = regexPattern != null ? Pattern.compile(  regexPattern ) : 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 );
      }
  
  
      public boolean matchPath( String str, boolean isCaseSensitive )
      {
          if ( regexPattern != null )
          {
              return regexPatternRegex.matcher( str ).matches();
          }
          else
          {
              return SelectorUtils.matchAntPathPattern( this, str, separator, isCaseSensitive );
          }
      }
  
      boolean matchPath( String str, String[] strDirs, boolean isCaseSensitive )
      {
          if ( regexPattern != null )
          {
              return regexPatternRegex.matcher( str ).matches();
          }
          else
          {
              return SelectorUtils.matchAntPathPattern( getTokenizedPathString(), strDirs, isCaseSensitive );
          }
      }
  
      public boolean matchPatternStart( @Nonnull 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 = source.replace( '\\', '/' );
 
             return SelectorUtils.matchAntPathPatternStart( this, str, File.separator, isCaseSensitive )
                 || SelectorUtils.matchAntPathPatternStart( this, altStr, "/", isCaseSensitive );
         }
     }
 
     public String[] getTokenizedPathString()
     {
         return tokenized;
     }
 
 
     public boolean startsWith( String string )
     {
         return source.startsWith( string );
     }
 
 
     static String[] tokenizePathToString( @Nonnull String path, @Nonnull 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[ret.size()] );
     }
 
     public static MatchPattern fromString( String source )
     {
         return new MatchPattern( source, File.separator );
     }
 
 }