/**
    * Copyright 2011-2012 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 com.dhptech.maven.stripbom;
  
  import static java.util.Arrays.asList;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.codehaus.plexus.util.DirectoryScanner;
  
  /**
   * Logic for recursively scanning a base directory for files that match include/exclude patterns
   */
  public final class SimpleScanner {
  
      private final File basedir;
      private final String[] included;
      private final String[] excluded;
  
      private DirectoryScanner scanner;
  
      public SimpleScanner(File basedir, String[] included, String[] excluded, boolean useDefaultExcludes) {
          this.basedir = basedir;
          this.included = buildInclusions(included);
          this.excluded = buildExclusions(useDefaultExcludes, excluded);
      }
  
      public String[] getSelectedFiles() {
          scanIfNeeded();
          return scanner.getIncludedFiles();
      }
  
      public File getBasedir() {
          return basedir;
      }
  
      public String[] getIncluded() {
          return included;
      }
  
      public String[] getExcluded() {
          return excluded;
      }
  
      protected synchronized void scanIfNeeded() {
          if (scanner == null) {
              scanner = new DirectoryScanner();
              scanner.setBasedir(basedir);
              scanner.setIncludes(included);
              scanner.setExcludes(excluded);
              scanner.scan();
          }
      }
  
      protected static String[] buildExclusions(boolean useDefaultExcludes, String... excludes) {
          List<String> exclusions = new ArrayList<String>();
          if (useDefaultExcludes) {
              exclusions.addAll(asList(DEFAULT_EXCLUDES));
          }
          if (excludes != null && excludes.length > 0) {
              exclusions.addAll(asList(excludes));
          }
          return exclusions.toArray(new String[exclusions.size()]);
      }
  
      protected static String[] buildInclusions(String... includes) {
          return includes != null && includes.length > 0 ? includes : DEFAULT_INCLUDE;
      }
  
      static final String[] DEFAULT_INCLUDE = new String[] { "**" };
  
      static final String[] DEFAULT_EXCLUDES = {
              // Miscellaneous typical temporary files
              "**/*~", "**/#*#", "**/.#*",
              "**/%*%",
              "**/._*",
              "**/.repository/**",
  
              // CVS
              "**/CVS",
              "**/CVS/**",
              "**/.cvsignore",
  
              // RCS
             "**/RCS",
             "**/RCS/**",
 
             // SCCS
             "**/SCCS",
             "**/SCCS/**",
 
             // Visual SourceSafe
             "**/vssver.scc",
 
             // Subversion
             "**/.svn",
             "**/.svn/**",
 
             // Arch
             "**/.arch-ids",
             "**/.arch-ids/**",
 
             // Bazaar
             "**/.bzr",
             "**/.bzr/**",
 
             // SurroundSCM
             "**/.MySCMServerInfo",
 
             // Mac
             "**/.DS_Store",
 
             // Serena Dimensions Version 10
             "**/.metadata",
             "**/.metadata/**",
 
             // Mercurial
             "**/.hg",
             "**/.hg/**",
 
             // git
             "**/.git",
             "**/.git/**",
 
             // BitKeeper
             "**/BitKeeper", "**/BitKeeper/**", "**/ChangeSet",
             "**/ChangeSet/**",
 
             // darcs
             "**/_darcs", "**/_darcs/**", "**/.darcsrepo", "**/.darcsrepo/**", "**/-darcs-backup*",
             "**/.darcs-temp-mail",
 
             // maven project's temporary files
             "**/target/**", "**/test-output/**", "**/release.properties", "**/dependency-reduced-pom.xml",
 
             // code coverage tools
             "**/cobertura.ser", "**/.clover/**",
 
             // eclipse project files
             "**/.classpath", "**/.project", "**/.settings/**",
 
             // IDEA project files
             "**/*.iml", "**/*.ipr", "**/*.iws",
 
             // descriptors
             "**/MANIFEST.MF",
 
             // binary files - images
             "**/*.jpg", "**/*.png", "**/*.gif", "**/*.ico", "**/*.bmp", "**/*.tiff", "**/*.tif", "**/*.cr2",
             "**/*.xcf",
 
             // binary files - programs
             "**/*.class", "**/*.exe",
 
             // checksum files
             "**/*.md5", "**/*.sha1",
 
             // binary files - archives
             "**/*.jar", "**/*.war", "**/*.zip", "**/*.rar", "**/*.tar", "**/*.tar.gz", "**/*.tar.bz2", "**/*.gz",
 
             // binary files - documents
             "**/*.xls",
 
             // ServiceLoader files
             "**/META-INF/services/**" };
 
 }