/*
* 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.command.impl.listing;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.ftpserver.ftplet.FileSystemView;
import org.apache.ftpserver.ftplet.FtpException;
import org.apache.ftpserver.ftplet.FtpFile;
/**
* <strong>Internal class, do not use directly.</strong>
*
* This class prints file listing.
*
* @author <a href="http://mina.apache.org">Apache MINA Project</a>
*/
public class DirectoryLister {
private String traverseFiles(final List<? extends FtpFile> files,
final FileFilter filter, final FileFormater formater) {
StringBuilder sb = new StringBuilder();
sb.append(traverseFiles(files, filter, formater, true));
sb.append(traverseFiles(files, filter, formater, false));
return sb.toString();
}
private String traverseFiles(final List<? extends FtpFile> files,
final FileFilter filter, final FileFormater formater,
boolean matchDirs) {
StringBuilder sb = new StringBuilder();
for (FtpFile file : files) {
if (file == null) {
continue;
}
if (filter == null || filter.accept(file)) {
if (file.isDirectory() == matchDirs) {
sb.append(formater.format(file));
}
}
}
return sb.toString();
}
public String listFiles(final ListArgument argument,
final FileSystemView fileSystemView, final FileFormater formater)
throws IOException {
StringBuilder sb = new StringBuilder();
// get all the file objects
List<? extends FtpFile> 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 List<? extends FtpFile> listFiles(FileSystemView fileSystemView, String file) {
List <? extends FtpFile> files = null;
try {
FtpFile virtualFile = fileSystemView.getFile(file);
if (virtualFile.isFile()) {
List<FtpFile> auxFiles = new ArrayList<FtpFile>();
auxFiles.add(virtualFile);
files = auxFiles;
} else {
files = virtualFile.listFiles();
}
} catch (FtpException ex) {
}
return files;
}
}