smartfiles.java

大象购物系统

package com.comm.upload;

import java.io.*;
import java.util.*;

public class SmartFiles {
    //private SmartUpload m_parent;
    private Hashtable m_files;
    private int m_counter;

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

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

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

    public int getCount() {
        return m_counter;
    }

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

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

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