/*
    * 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.
   */
  package org.apache.maven.plugins.shade.filter;
  
  import java.io.File;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.maven.plugins.shade.mojo.ArchiveFilter;
  import org.codehaus.plexus.util.SelectorUtils;
  
  /**
   * @author David Blevins
   */
  /**
   * @author kama
   *
   */
  public class SimpleFilter implements Filter {
  
      private Set<File> jars;
  
      private Set<String> includes;
  
      private Set<String> excludes;
  
      private boolean excludeDefaults = true;
  
      /**
       * @deprecated As of release 3.2.2, replaced by {@link #SimpleFilter(Set, ArchiveFilter)}}
       * @param jars set of {@link File}s.
       * @param includes set of includes.
       * @param excludes set of excludes.
       */
      @Deprecated
      public SimpleFilter(Set<File> jars, Set<String> includes, Set<String> excludes) {
          this(jars, includes, excludes, true);
      }
  
      /**
       * @param jars set of {@link File}s.
       * @param archiveFilter set of {@link ArchiveFilter}s.
       */
      public SimpleFilter(final Set<File> jars, final ArchiveFilter archiveFilter) {
          this(jars, archiveFilter.getIncludes(), archiveFilter.getExcludes(), archiveFilter.getExcludeDefaults());
      }
  
      /**
       * @param jars set of {@link File}s.
       * @param includes set of includes.
       * @param excludes set of excludes.
       * @param excludeDefaults whether to exclude default includes once includes are provided explicitly.
       */
      private SimpleFilter(
              final Set<File> jars,
              final Set<String> includes,
              final Set<String> excludes,
              final boolean excludeDefaults) {
          this.jars = (jars != null) ? Collections.<File>unmodifiableSet(jars) : Collections.<File>emptySet();
          this.includes = normalizePatterns(includes);
          this.excludes = normalizePatterns(excludes);
          this.excludeDefaults = excludeDefaults;
      }
  
      /** {@inheritDoc} */
      @Override
      public boolean canFilter(File jar) {
          return jars.contains(jar);
      }
  
      /** {@inheritDoc} */
      @Override
      public boolean isFiltered(String classFile) {
          String path = normalizePath(classFile);
  
          return !((!excludeDefaults || isIncluded(path)) && !isExcluded(path));
      }
  
      /**
       * @param classFile The class file.
       * @return true if included false otherwise.
       */
     public boolean isSpecificallyIncluded(String classFile) {
         if (includes == null || includes.isEmpty()) {
             return false;
         }
 
         String path = normalizePath(classFile);
 
         return isIncluded(path);
     }
 
     private boolean isIncluded(String classFile) {
         if (includes == null || includes.isEmpty()) {
             return true;
         }
 
         return matchPaths(includes, classFile);
     }
 
     private boolean isExcluded(String classFile) {
         if (excludes == null || excludes.isEmpty()) {
             return false;
         }
 
         return matchPaths(excludes, classFile);
     }
 
     private boolean matchPaths(Set<String> patterns, String classFile) {
         for (String pattern : patterns) {
 
             if (SelectorUtils.matchPath(pattern, classFile)) {
                 return true;
             }
         }
 
         return false;
     }
 
     private String normalizePath(String path) {
         return (path != null) ? path.replace(File.separatorChar == '/' ? '\\' : '/', File.separatorChar) : null;
     }
 
     private Set<String> normalizePatterns(Set<String> patterns) {
         Set<String> result = new HashSet<>();
 
         if (patterns != null) {
             for (String pattern : patterns) {
                 pattern = normalizePath(pattern);
 
                 if (pattern.endsWith(File.separator)) {
                     pattern += "**";
                 }
 
                 result.add(pattern);
             }
         }
 
         return result;
     }
 
     /** {@inheritDoc} */
     @Override
     public void finished() {}
 }