/*
* 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.ftpserver.listing;
import java.io.IOException;
import org.apache.ftpserver.ftplet.FileObject;
import org.apache.ftpserver.ftplet.FileSystemView;
import org.apache.ftpserver.ftplet.FtpException;
/**
* This class prints file listing.
*
* @author The Apache MINA Project (dev@mina.apache.org)
* @version $Rev: 686637 $, $Date: 2008-08-17 21:52:42 +0200 (Sun, 17 Aug 2008) $
*/
public class DirectoryLister {
private String traverseFiles(final FileObject[] files,
final FileFilter filter, final FileFormater formater) {
StringBuffer sb = new StringBuffer();
sb.append(traverseFiles(files, filter, formater, true));
sb.append(traverseFiles(files, filter, formater, false));
return sb.toString();
}
private String traverseFiles(final FileObject[] files,
final FileFilter filter, final FileFormater formater,
boolean matchDirs) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < files.length; i++) {
if (files[i] == null) {
continue;
}
if (filter == null || filter.accept(files[i])) {
if (files[i].isDirectory() == matchDirs) {
sb.append(formater.format(files[i]));
}
}
}
return sb.toString();
}
public String listFiles(final ListArgument argument,
final FileSystemView fileSystemView, final FileFormater formater)
throws IOException {
StringBuffer sb = new StringBuffer();
// get all the file objects
FileObject[] files = listFiles(fileSystemView, argument.getFile());
if (files != null) {
FileFilter filter = null;
if ((argument.hasOption('a'))) {
filter = new VisibleFileFilter();
}
if (argument.getPattern() != null) {
filter = new RegexFileFilter(argument.getPattern(), filter);
}
sb.append(traverseFiles(files, filter, formater));
}
return sb.toString();
}
/**
* Get the file list. Files will be listed in alphabetlical order.
*/
private FileObject[] listFiles(FileSystemView fileSystemView, String file) {
FileObject[] files = null;
try {
FileObject virtualFile = fileSystemView.getFileObject(file);
if (virtualFile.isFile()) {
files = new FileObject[] { virtualFile };
} else {
files = virtualFile.listFiles();
}
} catch (FtpException ex) {
}
return files;
}
}