package org.codehaus.plexus.compiler.util.scan;
   
   /*
    * Copyright 2001-2005 The Apache Software 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.Collections;
  import java.util.List;
  import java.util.Set;
  
  import org.codehaus.plexus.compiler.util.scan.mapping.SourceMapping;
  import org.codehaus.plexus.util.DirectoryScanner;
  
  /**
   * @author jdcasey
   */
  public abstract class AbstractSourceInclusionScanner implements SourceInclusionScanner {
      private final List<SourceMapping> sourceMappings = new ArrayList<>();
  
      public final void addSourceMapping(SourceMapping sourceMapping) {
          sourceMappings.add(sourceMapping);
      }
  
      protected final List<SourceMapping> getSourceMappings() {
          return Collections.unmodifiableList(sourceMappings);
      }
  
      protected String[] scanForSources(File sourceDir, Set<String> sourceIncludes, Set<String> sourceExcludes) {
          DirectoryScanner ds = new DirectoryScanner();
          ds.setFollowSymlinks(true);
          ds.setBasedir(sourceDir);
  
          String[] includes;
          if (sourceIncludes.isEmpty()) {
              includes = new String[0];
          } else {
              includes = sourceIncludes.toArray(new String[0]);
          }
  
          ds.setIncludes(includes);
  
          String[] excludes;
          if (sourceExcludes.isEmpty()) {
              excludes = new String[0];
          } else {
              excludes = sourceExcludes.toArray(new String[0]);
          }
  
          ds.setExcludes(excludes);
          ds.addDefaultExcludes();
  
          ds.scan();
  
          return ds.getIncludedFiles();
      }
  }