files.java

来自「本程序实现了一个新闻发布系统」· Java 代码 · 共 72 行

package com.jspsmart.upload;
import java.io.IOException;
import java.util.*;

public class Files
{

    private SmartUpload m_parent;
    private Hashtable m_files;
    private int m_counter;

Files()
{
    m_files = new Hashtable();
    m_counter = 0;
}


protected void addFile(File newFile)
{
    if (newFile == null)
    {
        throw new IllegalArgumentException("newFile cannot be null.");
    }
    else
    {
        m_files.put(new Integer(m_counter), newFile);
        m_counter++;
        return;
    }
}


public Collection getCollection()
{
    return m_files.values();
}


public int getCount()
{
    return m_counter;
}


public Enumeration getEnumeration()
{
    return m_files.elements();
}


public File getFile(int index)
{
    if (index < 0)
        throw new IllegalArgumentException("File's index cannot be a negative value (1210).");
    File retval = (File) m_files.get(new Integer(index));
    if (retval == null)
        throw new IllegalArgumentException("Files' name is invalid or does not exist (1205).");
    else
        return retval;
}


public long getSize() throws IOException
{
    long tmp = 0L;
    for (int i = 0; i < m_counter; i++)
        tmp += getFile(i).getSize();

    return tmp;
}
}