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 org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import jcifs.CIFSException;
  import jcifs.CloseableIterator;
  import jcifs.ResourceFilter;
  import jcifs.SmbResource;
  
  
  abstract class FileEntryAdapterIterator implements CloseableIterator<SmbResource> {
  
      private static final Logger log = LoggerFactory.getLogger(FileEntryAdapterIterator.class);
  
      private final CloseableIterator<FileEntry> delegate;
      private final ResourceFilter filter;
      private final SmbResource parent;
      private SmbResource next;
  
  
      /**
       * @param parent
       * @param delegate
       * @param filter
       * 
       */
      public FileEntryAdapterIterator ( SmbResource parent, CloseableIterator<FileEntry> delegate, ResourceFilter filter ) {
          this.parent = parent;
          this.delegate = delegate;
          this.filter = filter;
          this.next = advance();
      }
  
  
      /**
       * @return the parent
       */
      protected final SmbResource getParent () {
          return this.parent;
      }
  
  
      /**
       * @return
       * 
       */
      private SmbResource advance () {
          while ( this.delegate.hasNext() ) {
              FileEntry fe = this.delegate.next();
              if ( this.filter == null ) {
                  try {
                      return adapt(fe);
                  }
                  catch ( MalformedURLException e ) {
                      log.error("Failed to create child URL", e);
                      continue;
                  }
              }
  
              try ( SmbResource r = adapt(fe) ) {
                  if ( this.filter.accept(r) ) {
                      return r;
                  }
              }
              catch ( MalformedURLException e ) {
                  log.error("Failed to create child URL", e);
                  continue;
              }
              catch ( CIFSException e ) {
                  log.error("Filter failed", e);
                  continue;
              }
          }
          return null;
      }
  
  
      protected abstract SmbResource adapt ( FileEntry e ) throws MalformedURLException;
  
  
      /**
       * {@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}
       * 
       * @throws CIFSException
       *
       * @see java.lang.AutoCloseable#close()
       */
      @Override
      public void close () throws CIFSException {
          this.delegate.close();
      }
  
      @Override
      public void remove() {
          this.delegate.remove();
      }
  }