downloadtransferable.java

MyDownloader 是一款使用 http 协议(RFC 1867)用于下载一个或多个文件到本地的简单易用的收费 Java 程序.使用托拽操作,你可以在一个页面内下载多个文件.在下载文件的过程当中

/*
 * Copyright 2007 JavaAtWork All rights reserved.
 * Use is subject to license terms.
 */
package com.javaatwork.mydownloader.listeners;

import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;

/**
 * A holder class for storing the files which are drag and dropped.
 * 
 * @author Johannes Postma
 */
public class DownloadTransferable implements Transferable {

	private File [] files = null;
	
	/**
	 * Creates a new DownloadTransferable.
	 * 
	 * @param files The files which are dragged and dropped.
	 */
	public DownloadTransferable(File [] files) {
		 this.files = files;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.awt.datatransfer.Transferable#getTransferDataFlavors()
	 */
	public DataFlavor[] getTransferDataFlavors() {
		DataFlavor[] df = new DataFlavor[1];
		df[0] = DataFlavor.javaFileListFlavor;
		return df;
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see java.awt.datatransfer.Transferable#isDataFlavorSupported(java.awt.datatransfer.DataFlavor)
	 */
	public boolean isDataFlavorSupported(DataFlavor flavor) {
		if (flavor == DataFlavor.javaFileListFlavor) {
			return true;
		} else {
			return false;
		}
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see java.awt.datatransfer.Transferable#getTransferData(java.awt.datatransfer.DataFlavor)
	 */
	public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
		
		return Arrays.asList(files);   
	}
}