/*
    * 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.commons.vfs2.provider.jar;
  
  import java.io.IOException;
  import java.security.cert.Certificate;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.jar.Attributes;
  import java.util.jar.JarEntry;
  import java.util.jar.JarFile;
  import java.util.jar.Manifest;
  import java.util.zip.ZipEntry;
  
  import org.apache.commons.vfs2.FileSystemException;
  import org.apache.commons.vfs2.provider.AbstractFileName;
  import org.apache.commons.vfs2.provider.zip.ZipFileObject;
  
  /**
   * A file in a Jar file system.
   */
  public class JarFileObject extends ZipFileObject {
  
      private final JarFileSystem fs;
  
      private Attributes attributes;
  
      protected JarFileObject(final AbstractFileName name, final ZipEntry entry, final JarFileSystem fs,
              final boolean zipExists) throws FileSystemException {
          super(name, entry, fs, zipExists);
          if (entry != null) {
  			// For Java 9 and up: Force the certificates to be read and cached now. This avoids an
  			// IllegalStateException in java.util.jar.JarFile.isMultiRelease() when it tries
  			// to read the certificates and the file is closed.
          	((JarEntry) entry).getCertificates();
          }
          this.fs = fs;
  
          try {
              getAttributes(); // early get the attributes as the zip file might be closed
          } catch (final IOException e) {
              throw new FileSystemException(e);
          }
      }
  
      /**
       * Returns the Jar manifest.
       */
      Manifest getManifest() throws IOException {
          if (fs.getZipFile() == null) {
              return null;
          }
  
          return ((JarFile) fs.getZipFile()).getManifest();
      }
  
      /**
       * Returns the attributes of this file.
       */
      Attributes getAttributes() throws IOException {
          if (attributes == null) {
              if (entry == null) {
                  attributes = new Attributes(1);
              } else {
                  attributes = ((JarEntry) entry).getAttributes();
                  if (attributes == null) {
                      attributes = new Attributes(1);
                  }
              }
          }
  
          return attributes;
      }
  
      /**
       * Returns the value of an attribute.
       */
      @Override
      protected Map<String, Object> doGetAttributes() throws Exception {
          final Map<String, Object> attrs = new HashMap<>();
  
          // Add the file system's attributes first
          final JarFileSystem../../../../../org/apache/commons/vfs2/provider/jar/JarFileSystem.html#JarFileSystem">JarFileSystem fs = (JarFileSystem) getFileSystem();
          addAll(fs.getAttributes(), attrs);
 
         // Add this file's attributes
         addAll(getAttributes(), attrs);
 
         return attrs;
     }
 
     /**
      * Adds the source attributes to the destination map.
      */
     private void addAll(final Attributes src, final Map<String, Object> dest) {
         for (final Entry<Object, Object> entry : src.entrySet()) {
             // final String name = entry.getKey().toString().toLowerCase();
             final String name = entry.getKey().toString();
             dest.put(name, entry.getValue());
         }
     }
 
     /**
      * Return the certificates of this JarEntry.
      */
     @Override
     protected Certificate[] doGetCertificates() {
         if (entry == null) {
             return null;
         }
 
         return ((JarEntry) entry).getCertificates();
     }
 }