ui/src/main/java/net/sf/taverna/t2/lang/ui/CTransferableTreePath.java

/*******************************************************************************
 * Copyright (C) 2007 The University of Manchester   
 * 
 *  Modifications to the initial code base are copyright of their
 *  respective authors, or their employers as appropriate.
 * 
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2.1 of
 *  the License, or (at your option) any later version.
 *    
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *    
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 ******************************************************************************/
package net.sf.taverna.t2.lang.ui;

import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;

import javax.swing.tree.TreePath;

/**
 * This represents a TreePath (a node in a JTree) that can be transferred
 * between a drag source and a drop target.
 */
public class CTransferableTreePath implements Transferable {
	// The type of DnD object being dragged...
	public static final DataFlavor TREEPATH_FLAVOR = new DataFlavor(
			DataFlavor.javaJVMLocalObjectMimeType, "TreePath");

	private TreePath _path;

	private DataFlavor[] _flavors = { TREEPATH_FLAVOR };

	/**
	 * Constructs a transferrable tree path object for the specified path.
	 */
	public CTransferableTreePath(TreePath path) {
		_path = path;
	}

	// Transferable interface methods...
	public DataFlavor[] getTransferDataFlavors() {
		return _flavors;
	}

	public boolean isDataFlavorSupported(DataFlavor flavor) {
		return java.util.Arrays.asList(_flavors).contains(flavor);
	}

	public synchronized Object getTransferData(DataFlavor flavor)
			throws UnsupportedFlavorException {
		if (flavor.isMimeTypeEqual(TREEPATH_FLAVOR.getMimeType())) // DataFlavor.javaJVMLocalObjectMimeType))
			return _path;
		else
			throw new UnsupportedFlavorException(flavor);
	}

}