cn.sh.zyh.ftpserver.impl.representation.AsciiRepresentation.java Source code

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Here is the source code for cn.sh.zyh.ftpserver.impl.representation.AsciiRepresentation.java

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///////////////////////////////////////////////////////////////////
// Copyright:2009 by RICOH COMPANY, LTD. All Rights Reserved
///////////////////////////////////////////////////////////////////
/*
 * Copyright 2005 XJFTP Team (http://xjftp.sourceforge.net/)
 * 
 * Licensed 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 cn.sh.zyh.ftpserver.impl.representation;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

import org.apache.commons.net.io.FromNetASCIIInputStream;
import org.apache.commons.net.io.ToNetASCIIOutputStream;

/**
 * This class converts data streams to and from ASCII representation.
 * 
 * New lines are represented as "\r\n".
 * <p>
 * Copyright &copy; 2005 <a href="http://xjftp.sourceforge.net/">XJFTP Team</a>.
 * All rights reserved. Use is subject to <a
 * href="http://xjftp.sourceforge.net/LICENSE.TXT">licence terms</a> (<a
 * href="http://www.apache.org/licenses/LICENSE-2.0.html">Apache License v2.0</a>)<br/>
 * <p>
 * Last modified: $Date: 2005/01/21 00:03:31 $, by $Author: mmcnamee $
 * <p>
 * 
 * @author Mark McNamee (<a
 *         href="mailto:mmcnamee@users.sourceforge.net">mmcnamee at
 *         users.sourceforge.net</a>)
 * @version $Revision: 1.2 $
 */
public class AsciiRepresentation extends Representation {

    /** The instance. */
    private static Representation instance = new AsciiRepresentation();

    /**
     * The Constructor.
     */
    private AsciiRepresentation() {
    }

    /**
     * Gets the instance.
     * 
     * @return the instance
     */
    public static Representation getInstance() {
        return instance;
    }

    /**
     * Gets the input stream of special socket.
     * 
     * @param socket
     *            the socket
     * 
     * @return the input stream
     * 
     * @throws IOException
     *             the IO exception
     * @see cn.sh.zyh.ftpserver.impl.representation.Representation#getInputStream(java.net.Socket)
     */
    public InputStream getInputStream(final Socket socket) throws IOException {
        return new FromNetASCIIInputStream(socket.getInputStream());
    }

    /**
     * Gets the output of special stream.
     * 
     * @param socket
     *            the socket
     * 
     * @return the output stream
     * 
     * @throws IOException
     *             the IO exception
     * @see cn.sh.zyh.ftpserver.impl.representation.Representation#getOutputStream(java.net.Socket)
     */
    public OutputStream getOutputStream(final Socket socket) throws IOException {
        return new ToNetASCIIOutputStream(socket.getOutputStream());
    }

    /**
     * Gets the name of current transfer type.
     * 
     * @return "ASCII"
     * @see cn.sh.zyh.ftpserver.impl.representation.Representation#getName()
     */
    public String getName() {
        return "ASCII";
    }

    /**
     * The size of special file.
     * 
     * @param file
     *            the file
     * 
     * @return the size of file
     * @throws IOException
     *             the IO exception
     * @see cn.sh.zyh.ftpserver.impl.representation.Representation#sizeOf(java.io.File)
     */
    public long sizeOf(final File file) throws IOException {
        final InputStream in = new FileInputStream(file);
        long size = 0;
        try {
            int c;
            while ((c = in.read()) != -1) {
                // skip \r, only count the \n in the \r\n's!
                // this might not work on MAC!!
                if (c != '\r') {
                    size++;
                }
            }
        } finally {
            in.close();
        }
        return size;
    }
}