/*
    * 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.ejb.utils;
  
  import java.io.File;
  import java.util.Enumeration;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  import java.util.jar.JarEntry;
  import java.util.jar.JarFile;
  
  /**
   * Jar Content Checker
   */
  public class JarContentChecker {
      private static final Boolean FOUND = Boolean.TRUE;
  
      private static final Boolean NOT_FOUND = Boolean.FALSE;
  
      private Map<File, Boolean> fileMap;
  
      private Map<File, Boolean> directoryMap;
  
      public JarContentChecker() {
          fileMap = new HashMap<>();
          directoryMap = new HashMap<>();
      }
  
      public void addDirectory(File dir) {
          directoryMap.put(dir, NOT_FOUND);
      }
  
      public void addFile(File file) {
          fileMap.put(file, NOT_FOUND);
      }
  
      /**
       * checks whether the jar file contains the files for this checker,
       * files with the same file name but with different data will not
       * be considered.
       *
       * @param jarFile the Jar file
       * @return boolean
       */
      public boolean isOK(JarFile jarFile) {
          boolean bRetVal;
          Enumeration<JarEntry> zipentries = jarFile.entries();
          JarEntry entry;
          File entryFile;
  
          resetList();
  
          while (zipentries.hasMoreElements()) {
              entry = zipentries.nextElement();
              entryFile = new File(entry.getName());
  
              if (entry.isDirectory()) {
                  // cross out all files found in the jar file
                  // found files with incorrect content will not
                  // be counted
                  if (directoryMap.containsKey(entryFile)) {
                      directoryMap.put(entryFile, FOUND);
                  }
              } else if (fileMap.containsKey(entryFile)) {
                  fileMap.put(entryFile, FOUND);
              }
          }
  
          bRetVal = checkFinalResult();
  
          return bRetVal;
      }
  
      private boolean checkFinalResult() {
          boolean bRetVal = true;
  
          Iterator<File> keys = fileMap.keySet().iterator();
  
          while (keys.hasNext() && bRetVal) {
              if (fileMap.get(keys.next()).equals(NOT_FOUND)) {
                  bRetVal = false;
              }
         }
 
         keys = directoryMap.keySet().iterator();
 
         while (keys.hasNext() && bRetVal) {
             if (directoryMap.get(keys.next()).equals(NOT_FOUND)) {
                 bRetVal = false;
             }
         }
 
         return bRetVal;
     }
 
     private void resetList() {
         Iterator<File> keys = fileMap.keySet().iterator();
 
         while (keys.hasNext()) {
             fileMap.put(keys.next(), NOT_FOUND);
         }
 
         keys = directoryMap.keySet().iterator();
 
         while (keys.hasNext()) {
             directoryMap.put(keys.next(), NOT_FOUND);
         }
     }
 }