package org.apache.maven.plugin.surefire.util;
   
   /*
    * 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.Collections;
  import java.util.List;
  import org.apache.commons.lang3.StringUtils;
  import org.apache.maven.surefire.util.DefaultScanResult;
  
  /**
   * Scans directories looking for tests.
   *
   * @author Karl M. Davis
   * @author Kristian Rosenvold
   */
  public class DirectoryScanner
  {
  
      private static final String FS = System.getProperty( "file.separator" );
  
      private static final String JAVA_SOURCE_FILE_EXTENSION = ".java";
  
      private static final String JAVA_CLASS_FILE_EXTENSION = ".class";
  
      private final File basedir;
  
      private final List<String> includes;
  
      private final List<String> excludes;
  
      private final List<String> specificTests;
  
      public DirectoryScanner( File basedir, List<String> includes, List<String> excludes, List<String> specificTests )
      {
          this.basedir = basedir;
          this.includes = includes;
          this.excludes = excludes;
          this.specificTests = specificTests;
      }
  
      public DefaultScanResult scan()
      {
          String[] specific = specificTests == null ? new String[0] : processIncludesExcludes( specificTests );
          SpecificFileFilter specificTestFilter = new SpecificFileFilter( specific );
  
          List<String> result = new ArrayList<String>();
          if ( basedir.exists() )
          {
              org.apache.maven.shared.utils.io.DirectoryScanner scanner =
                  new org.apache.maven.shared.utils.io.DirectoryScanner();
  
              scanner.setBasedir( basedir );
  
              if ( includes != null )
              {
                  scanner.setIncludes( processIncludesExcludes( includes ) );
              }
  
              if ( excludes != null )
              {
                  scanner.setExcludes( processIncludesExcludes( excludes ) );
              }
  
              scanner.scan();
              for ( String test : scanner.getIncludedFiles() )
              {
                  if ( specificTestFilter.accept( stripBaseDir( basedir.getAbsolutePath(), test ) ) )
                  {
                      result.add( convertToJavaClassName( test ) );
                  }
              }
          }
          return new DefaultScanResult( result );
      }
  
      private String convertToJavaClassName( String test )
      {
          return StringUtils.removeEnd( test, ".class" ).replace( FS, "." );
      }
  
     private String stripBaseDir( String basedir, String test )
     {
         return StringUtils.removeStart( test, basedir );
     }
 
     private static String[] processIncludesExcludes( List<String> list )
     {
         List<String> newList = new ArrayList<String>();
         for ( Object aList : list )
         {
             String include = (String) aList;
             String[] includes = include.split( "," );
             Collections.addAll( newList, includes );
         }
 
         String[] incs = new String[newList.size()];
 
         for ( int i = 0; i < incs.length; i++ )
         {
             String inc = newList.get( i );
             if ( inc.endsWith( JAVA_SOURCE_FILE_EXTENSION ) )
             {
                 inc = StringUtils.removeEnd( inc, JAVA_SOURCE_FILE_EXTENSION ) + JAVA_CLASS_FILE_EXTENSION;
             }
             incs[i] = inc;
 
         }
         return incs;
     }
 }