content: /*
   * © 2017 AgNO3 Gmbh & Co. KG
   * 
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   * 
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   * 
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  package jcifs.smb;
  
  
  import java.net.MalformedURLException;
  import java.util.Iterator;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import jcifs.CIFSException;
  import jcifs.CloseableIterator;
  import jcifs.ResourceFilter;
  import jcifs.SmbConstants;
  import jcifs.SmbResource;
  
  
  class ShareEnumIterator implements CloseableIterator<SmbResource> {
  
      private static final Logger log = LoggerFactory.getLogger(ShareEnumIterator.class);
  
      private final Iterator<FileEntry> delegate;
      private final ResourceFilter filter;
      private final SmbResource parent;
      private SmbResource next;
  
  
      /**
       * @param parent
       * @param delegate
       * @param filter
       * 
       */
      public ShareEnumIterator ( SmbResource parent, Iterator<FileEntry> delegate, ResourceFilter filter ) {
          this.parent = parent;
          this.delegate = delegate;
          this.filter = filter;
          this.next = advance();
      }
  
  
      /**
       * @return next element
       */
      private SmbResource advance () {
          while ( this.delegate.hasNext() ) {
              FileEntry n = this.delegate.next();
              if ( this.filter == null ) {
                  try {
                      return adapt(n);
                  }
                  catch ( MalformedURLException e ) {
                      log.error("Failed to create child URL", e);
                      continue;
                  }
              }
              try ( SmbResource nr = adapt(n) ) {
                  if ( !this.filter.accept(nr) ) {
                      continue;
                  }
                  return nr;
              }
              catch ( CIFSException e ) {
                  log.error("Failed to apply filter", e);
                  continue;
              }
              catch ( MalformedURLException e ) {
                  log.error("Failed to create child URL", e);
                  continue;
              }
          }
          return null;
      }
  
  
      private SmbResource adapt ( FileEntry e ) throws MalformedURLException {
          return new SmbFile(this.parent, e.getName(), false, e.getType(), SmbConstants.ATTR_READONLY | SmbConstants.ATTR_DIRECTORY, 0L, 0L, 0L, 0L);
      }
  
  
      /**
       * {@inheritDoc}
       *
       * @see java.util.Iterator#hasNext()
       */
      @Override
      public boolean hasNext () {
          return this.next != null;
      }
  
  
      /**
       * {@inheritDoc}
       *
       * @see java.util.Iterator#next()
       */
      @Override
      public SmbResource next () {
          SmbResource n = this.next;
          this.next = advance();
          return n;
      }
  
  
      /**
       * {@inheritDoc}
       *
       * @see jcifs.CloseableIterator#close()
       */
      @Override
      public void close () {
          // nothing to clean up
          this.next = null;
      }
  
      @Override
      public void remove() {
          throw new UnsupportedOperationException("remove");
      }
  }