/**
    * Copyright 2011-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.
   */
  package org.kuali.maven.plugins.externals;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.codehaus.plexus.util.DirectoryScanner;
  
  /**
   * This class provides a simple method for scanning a directory for files that match include/exclude patterns
   */
  public class SimpleScanner extends DirectoryScanner {
  	private static final String FS = System.getProperty("file.separator");
  
  	public SimpleScanner() {
  		this(null, getArray(null), getArray(null));
  	}
  
  	public SimpleScanner(File baseDir, String include, String exclude) {
  		this(baseDir, getArray(include), getArray(exclude));
  	}
  
  	public SimpleScanner(File baseDir, String[] includes, String[] excludes) {
  		super();
  		setBasedir(baseDir);
  		setIncludes(includes);
  		setExcludes(excludes);
  	}
  
  	protected static final String[] getArray(String s) {
  		if (s == null) {
  			return null;
  		} else {
  			return new String[] { s };
  		}
  	}
  
  	/**
  	 * This method returns files that match an include pattern but do not match an exclude pattern
  	 */
  	public List<File> getFiles() {
  		scan();
  		String[] includedFiles = getIncludedFiles();
  		List<File> files = new ArrayList<File>();
  		for (String includedFile : includedFiles) {
  			String filename = getBasedir().getAbsolutePath() + FS + includedFile;
  			File file = new File(filename);
  			files.add(file);
  		}
  		return files;
  	}
  }