/
FileEntryAdapterIterator.java
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/
FileEntryAdapterIterator.java
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/*
* © 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();
}
}