beamaction.java

用jxse开发的一个p2p通讯软件 有聊天 文件共享 视频3大功能

/*
 *  Copyright (c) 2001 Sun Microsystems, Inc.  All rights
 *  reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in
 *  the documentation and/or other materials provided with the
 *  distribution.
 *
 *  3. The end-user documentation included with the redistribution,
 *  if any, must include the following acknowledgment:
 *  "This product includes software developed by the
 *  Sun Microsystems, Inc. for Project JXTA."
 *  Alternately, this acknowledgment may appear in the software itself,
 *  if and wherever such third-party acknowledgments normally appear.
 *
 *  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
 *  must not be used to endorse or promote products derived from this
 *  software without prior written permission. For written
 *  permission, please contact Project JXTA at http://www.jxta.org.
 *
 *  5. Products derived from this software may not be called "JXTA",
 *  nor may "JXTA" appear in their name, without prior written
 *  permission of Sun.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 *  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 *  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *  ====================================================================
 *
 *  This software consists of voluntary contributions made by many
 *  individuals on behalf of Project JXTA.  For more
 *  information on Project JXTA, please see
 *  <http://www.jxta.org/>.
 *
 *  This license is based on the BSD license adopted by the Apache Foundation.
 *
 *  $Id: BeamAction.java,v 1.3 2007/01/26 21:54:27 bondolo Exp $
 */

package net.jxta.myjxta.misc.beam;

import net.jxta.myjxta.View;
import net.jxta.myjxta.dialog.Dialog;
import net.jxta.myjxta.dialog.DialogManager;
import net.jxta.myjxta.util.Group;
import net.jxta.myjxta.util.objectmodel.GroupNode;
import net.jxta.myjxta.util.objectmodel.ShareNode;
import net.jxta.share.ContentAdvertisement;
import net.jxta.share.client.GetContentRequest;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.io.File;
import java.io.IOException;

/**
 * @author james todd [gonzo at jxta dot org]
 * @version $Id: BeamAction.java,v 1.3 2007/01/26 21:54:27 bondolo Exp $
 */

public class BeamAction
        extends AbstractAction {

    private static final String PREFIX = "NetBeams";

    private View view = null;

    class Fetcher
            extends GetContentRequest {

        private Group g = null;
        private File f = null;

        public Fetcher(Group g, ContentAdvertisement ca, File f) {
            super(g.getPeerGroup(), ca, f);

            this.g = g;
            this.f = f;
        }

        public void notifyDone() {
            displayDialog(this.g, this.f);
        }
    }

    public BeamAction(String name, View view) {
        super(name);

        this.view = view;
    }

    public void actionPerformed(ActionEvent ae) {
        ShareNode sn = (ShareNode) this.view.getJxtaNode(ShareNode.class);
        Group g = sn != null ? ((GroupNode) (sn.getParent())).getGroup() : null;

        if (sn != null &&
                g != null) {
            ContentAdvertisement sca = sn.getShare().getContentAdvertisement();
            File f = getFile(sca.getName());

            if (f != null) {
                new Fetcher(g, sca, f);
            }
        }
    }

    private File getFile(String n) {
        File f = null;

        try {
            f = File.createTempFile(PREFIX, n);
        } catch (IOException ioe) {
        }

        if (f != null) {
            f.deleteOnExit();
        }

        return f;
    }

    private void displayDialog(Group g, File b) {
        if (b != null) {
            Dialog d = DialogManager.getDialog(BeamDialog.class, g,
                    this.view.getControl());

            ((BeamDialog) d).setBeam(b);

            this.view.getControl().addDialog(d);
        }
    }
}