package org.apache.maven.plugin.clean;
   
   /*
    * 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 org.apache.maven.shared.utils.io.DirectoryScanner;
  import org.apache.maven.shared.utils.io.SelectorUtils;
  
  import java.io.File;
  import java.util.Arrays;
  
  
  /**
   * Selects paths based on Ant-like glob patterns.
   * 
   * @author Benjamin Bentmann
   */
  class GlobSelector
      implements Selector
  {
  
      private final String[] includes;
  
      private final String[] excludes;
  
      private final String str;
  
      public GlobSelector( String[] includes, String[] excludes )
      {
          this( includes, excludes, false );
      }
  
      public GlobSelector( String[] includes, String[] excludes, boolean useDefaultExcludes )
      {
          this.str = "includes = " + toString( includes ) + ", excludes = " + toString( excludes );
          this.includes = normalizePatterns( includes );
          this.excludes = normalizePatterns( addDefaultExcludes( excludes, useDefaultExcludes ) );
      }
  
      private static String toString( String[] patterns )
      {
          return ( patterns == null ) ? "[]" : Arrays.asList( patterns ).toString();
      }
  
      private static String[] addDefaultExcludes( String[] excludes, boolean useDefaultExcludes )
      {
          String[] defaults = DirectoryScanner.DEFAULTEXCLUDES;
          if ( !useDefaultExcludes )
          {
              return excludes;
          }
          else if ( excludes == null || excludes.length <= 0 )
          {
              return defaults;
          }
          else
          {
              String[] patterns = new String[excludes.length + defaults.length];
              System.arraycopy( excludes, 0, patterns, 0, excludes.length );
              System.arraycopy( defaults, 0, patterns, excludes.length, defaults.length );
              return patterns;
          }
      }
  
      private static String[] normalizePatterns( String[] patterns )
      {
          String[] normalized;
  
          if ( patterns != null )
          {
              normalized = new String[patterns.length];
              for ( int i = patterns.length - 1; i >= 0; i-- )
              {
                  normalized[i] = normalizePattern( patterns[i] );
              }
          }
          else
          {
              normalized = new String[0];
          }
  
          return normalized;
      }
 
     private static String normalizePattern( String pattern )
     {
         if ( pattern == null )
         {
             return "";
         }
 
         String normalized = pattern.replace( ( File.separatorChar == '/' ) ? '\\' : '/', File.separatorChar );
 
         if ( normalized.endsWith( File.separator ) )
         {
             normalized += "**";
         }
 
         return normalized;
     }
 
     public boolean isSelected( String pathname )
     {
         return ( includes.length <= 0 || isMatched( pathname, includes ) )
             && ( excludes.length <= 0 || !isMatched( pathname, excludes ) );
     }
 
     private static boolean isMatched( String pathname, String[] patterns )
     {
         for ( String pattern : patterns )
         {
             if ( SelectorUtils.matchPath( pattern, pathname ) )
             {
                 return true;
             }
         }
         return false;
     }
 
     public boolean couldHoldSelected( String pathname )
     {
         for ( String include : includes )
         {
             if ( SelectorUtils.matchPatternStart( include, pathname ) )
             {
                 return true;
             }
         }
         return includes.length <= 0;
     }
 
     public String toString()
     {
         return str;
     }
 
 }