01: /*
02: * Beryl - A web platform based on XML, XSLT and Java
03: * This file is part of the Beryl XML GUI
04: *
05: * Copyright (C) 2004 Wenzel Jakob <wazlaf@tigris.org>
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU Lesser General Public
09: * License as published by the Free Software Foundation; either
10: * version 2.1 of the License, or (at your option) any later version.
11:
12: * This program is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15: * Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public
18: * License along with this program; if not, write to the Free Software
19: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-3107 USA
20: */
21:
22: package org.beryl.gui;
23:
24: import java.awt.datatransfer.DataFlavor;
25: import java.awt.datatransfer.Transferable;
26: import java.awt.datatransfer.UnsupportedFlavorException;
27: import java.io.IOException;
28: import java.util.HashMap;
29: import java.util.Iterator;
30:
31: /**
32: * Comfortable transferable subclass for easy drag & drop
33: */
34: public class SimpleTransferable implements Transferable {
35: private HashMap data = null;
36:
37: public SimpleTransferable() {
38: data = new HashMap();
39: }
40:
41: /**
42: * Add data of a given mime type
43: */
44: public void addData(String mimeType, Object transferableData)
45: throws GUIException {
46: try {
47: data.put(new DataFlavor(mimeType), transferableData);
48: } catch (Exception e) {
49: throw new GUIException("Error while creating data flavor",
50: e);
51: }
52: }
53:
54: /**
55: * Retrieve data of a given mime type
56: */
57: public Object getData(String mimeType) throws GUIException {
58: try {
59: return data.get(new DataFlavor(mimeType));
60: } catch (Exception e) {
61: throw new GUIException("Error while creating data flavor",
62: e);
63: }
64: }
65:
66: /* Transferable implementation */
67: public Object getTransferData(DataFlavor flavor)
68: throws UnsupportedFlavorException, IOException {
69: return data.get(flavor);
70: }
71:
72: public DataFlavor[] getTransferDataFlavors() {
73: DataFlavor flavors[] = new DataFlavor[data.size()];
74: int counter = 0;
75:
76: for (Iterator i = data.keySet().iterator(); i.hasNext();) {
77: flavors[counter++] = (DataFlavor) i.next();
78: }
79: return flavors;
80: }
81:
82: public boolean isDataFlavorSupported(DataFlavor flavor) {
83: return data.containsKey(flavor);
84: }
85: }
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