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Apache Commons VFS is a Virtual File System library.

There is a newer version: 2.9.0

/*
 * 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.commons.vfs2.provider.ftp;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
import org.apache.commons.vfs2.FileSystemException;

/**
 * What VFS expects from an FTP client to provide.
 */
public interface FtpClient {

    boolean isConnected() throws FileSystemException;

    void disconnect() throws IOException;

    FTPFile[] listFiles(String relPath) throws IOException;

    boolean removeDirectory(String relPath) throws IOException;

    boolean deleteFile(String relPath) throws IOException;

    boolean rename(String oldName, String newName) throws IOException;

    boolean makeDirectory(String relPath) throws IOException;

    boolean completePendingCommand() throws IOException;

    InputStream retrieveFileStream(String relPath) throws IOException;

    InputStream retrieveFileStream(String relPath, long restartOffset) throws IOException;

    OutputStream appendFileStream(String relPath) throws IOException;

    OutputStream storeFileStream(String relPath) throws IOException;

    boolean abort() throws IOException;

    String getReplyString() throws IOException;

    default int getReplyCode() throws IOException {
        return FTPReply.COMMAND_OK;
    }

}