taverna-ui/src/main/java/org/apache/taverna/lang/ui/CTransferableTreePath.java

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/

package org.apache.taverna.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);
	}

}