1 /* |
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2 * Copyright (c) 1996, 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package java.awt.datatransfer; |
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27 |
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28 import java.io.*; |
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29 |
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30 |
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31 /** |
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32 * A <code>Transferable</code> which implements the capability required |
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33 * to transfer a <code>String</code>. |
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34 * |
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35 * This <code>Transferable</code> properly supports |
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36 * <code>DataFlavor.stringFlavor</code> |
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37 * and all equivalent flavors. Support for |
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38 * <code>DataFlavor.plainTextFlavor</code> |
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39 * and all equivalent flavors is <b>deprecated</b>. No other |
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40 * <code>DataFlavor</code>s are supported. |
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41 * |
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42 * @see java.awt.datatransfer.DataFlavor#stringFlavor |
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43 * @see java.awt.datatransfer.DataFlavor#plainTextFlavor |
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44 */ |
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45 public class StringSelection implements Transferable, ClipboardOwner { |
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46 |
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47 private static final int STRING = 0; |
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48 private static final int PLAIN_TEXT = 1; |
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49 |
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50 @SuppressWarnings("deprecation") |
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51 private static final DataFlavor[] flavors = { |
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52 DataFlavor.stringFlavor, |
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53 DataFlavor.plainTextFlavor // deprecated |
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54 }; |
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55 |
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56 private String data; |
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57 |
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58 /** |
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59 * Creates a <code>Transferable</code> capable of transferring |
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60 * the specified <code>String</code>. |
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61 * @param data the string to be transferred |
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62 */ |
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63 public StringSelection(String data) { |
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64 this.data = data; |
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65 } |
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66 |
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67 /** |
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68 * Returns an array of flavors in which this <code>Transferable</code> |
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69 * can provide the data. <code>DataFlavor.stringFlavor</code> |
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70 * is properly supported. |
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71 * Support for <code>DataFlavor.plainTextFlavor</code> is |
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72 * <b>deprecated</b>. |
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73 * |
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74 * @return an array of length two, whose elements are <code>DataFlavor. |
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75 * stringFlavor</code> and <code>DataFlavor.plainTextFlavor</code> |
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76 */ |
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77 public DataFlavor[] getTransferDataFlavors() { |
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78 // returning flavors itself would allow client code to modify |
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79 // our internal behavior |
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80 return flavors.clone(); |
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81 } |
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82 |
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83 /** |
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84 * Returns whether the requested flavor is supported by this |
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85 * <code>Transferable</code>. |
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86 * |
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87 * @param flavor the requested flavor for the data |
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88 * @return true if <code>flavor</code> is equal to |
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89 * <code>DataFlavor.stringFlavor</code> or |
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90 * <code>DataFlavor.plainTextFlavor</code>; false if <code>flavor</code> |
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91 * is not one of the above flavors |
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92 * @throws NullPointerException if flavor is <code>null</code> |
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93 */ |
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94 public boolean isDataFlavorSupported(DataFlavor flavor) { |
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95 // JCK Test StringSelection0003: if 'flavor' is null, throw NPE |
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96 for (int i = 0; i < flavors.length; i++) { |
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97 if (flavor.equals(flavors[i])) { |
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98 return true; |
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99 } |
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100 } |
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101 return false; |
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102 } |
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103 |
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104 /** |
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105 * Returns the <code>Transferable</code>'s data in the requested |
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106 * <code>DataFlavor</code> if possible. If the desired flavor is |
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107 * <code>DataFlavor.stringFlavor</code>, or an equivalent flavor, |
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108 * the <code>String</code> representing the selection is |
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109 * returned. If the desired flavor is |
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110 * <code>DataFlavor.plainTextFlavor</code>, |
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111 * or an equivalent flavor, a <code>Reader</code> is returned. |
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112 * <b>Note:</b> The behavior of this method for |
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113 * <code>DataFlavor.plainTextFlavor</code> |
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114 * and equivalent <code>DataFlavor</code>s is inconsistent with the |
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115 * definition of <code>DataFlavor.plainTextFlavor</code>. |
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116 * |
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117 * @param flavor the requested flavor for the data |
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118 * @return the data in the requested flavor, as outlined above |
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119 * @throws UnsupportedFlavorException if the requested data flavor is |
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120 * not equivalent to either <code>DataFlavor.stringFlavor</code> |
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121 * or <code>DataFlavor.plainTextFlavor</code> |
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122 * @throws IOException if an IOException occurs while retrieving the data. |
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123 * By default, StringSelection never throws this exception, but a |
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124 * subclass may. |
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125 * @throws NullPointerException if flavor is <code>null</code> |
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126 * @see java.io.Reader |
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127 */ |
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128 public Object getTransferData(DataFlavor flavor) |
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129 throws UnsupportedFlavorException, IOException |
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130 { |
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131 // JCK Test StringSelection0007: if 'flavor' is null, throw NPE |
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132 if (flavor.equals(flavors[STRING])) { |
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133 return (Object)data; |
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134 } else if (flavor.equals(flavors[PLAIN_TEXT])) { |
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135 return new StringReader(data == null ? "" : data); |
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136 } else { |
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137 throw new UnsupportedFlavorException(flavor); |
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138 } |
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139 } |
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140 |
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141 public void lostOwnership(Clipboard clipboard, Transferable contents) { |
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142 } |
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143 } |
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