1 | package org.greenstone.gatherer.collection;
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2 | /**
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3 | *#########################################################################
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4 | *
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5 | * A component of the Gatherer application, part of the Greenstone digital
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6 | * library suite from the New Zealand Digital Library Project at the
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7 | * University of Waikato, New Zealand.
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8 | *
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9 | * <BR><BR>
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10 | *
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11 | * Author: John Thompson, Greenstone Digital Library, University of Waikato
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12 | *
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13 | * <BR><BR>
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14 | *
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15 | * Copyright (C) 1999 New Zealand Digital Library Project
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16 | *
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17 | * <BR><BR>
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18 | *
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19 | * This program is free software; you can redistribute it and/or modify
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20 | * it under the terms of the GNU General Public License as published by
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21 | * the Free Software Foundation; either version 2 of the License, or
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22 | * (at your option) any later version.
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23 | *
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24 | * <BR><BR>
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25 | *
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26 | * This program is distributed in the hope that it will be useful,
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27 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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28 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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29 | * GNU General Public License for more details.
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30 | *
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31 | * <BR><BR>
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32 | *
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33 | * You should have received a copy of the GNU General Public License
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34 | * along with this program; if not, write to the Free Software
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35 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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36 | *########################################################################
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37 | */
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38 | import java.awt.*;
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39 | import java.awt.event.*;
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40 | import java.io.*;
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41 | import javax.swing.*;
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42 | import javax.swing.event.*;
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43 | import org.greenstone.gatherer.Gatherer;
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44 | import org.greenstone.gatherer.collection.Collection;
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45 | import org.greenstone.gatherer.util.ArrayTools;
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46 | import org.greenstone.gatherer.util.Utility;
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47 | /** This class provides the functionality to delete current collections from the GSDLHOME/collect/ directory. The user chooses the collection from a list, where each entry also displays details about itself, confirms the delete of a collection by checking a checkbox then presses the ok button to actually delete the collection.
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48 | * @author John Thompson, Greenstone Digital Library, University of Waikato
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49 | * @version 2.3
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50 | */
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51 | public class DeleteCollectionPrompt
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52 | extends JDialog {
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53 | /** The currently selected collection for deletion. */
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54 | private Collection collection = null;
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55 | /** The model behind the list. */
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56 | private DefaultListModel list_model = null;
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57 | /** A reference to ourself so any inner-classes get dispose of us. */
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58 | private DeleteCollectionPrompt prompt = null;
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59 | /** The close button, which exits the prompt without deleting anything. */
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60 | private JButton close_button = null;
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61 | /** The ok button which causes the selected collection to be deleted. */
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62 | private JButton ok_button = null;
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63 | /** The confirmation check box. */
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64 | private JCheckBox confirmation = null;
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65 | /** The label above details. */
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66 | private JLabel details_label = null;
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67 | /** The label above the list. */
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68 | private JLabel list_label = null;
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69 | /** The list of available collections. */
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70 | private JList list = null;
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71 | /** The text area used to display details about the collection selected. */
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72 | private JTextArea details = null;
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73 | /** A string array used to pass arguments to the phrase retrieval method. */
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74 | private String args[] = null;
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75 | /** The size of the delete prompt screen. */
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76 | public static final Dimension SIZE = new Dimension(500, 500);
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77 | /** Constructor.
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78 | * @see org.greenstone.gatherer.collection.DeleteCollectionPrompt.CloseButtonListener
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79 | * @see org.greenstone.gatherer.collection.DeleteCollectionPrompt.CollectionListListener
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80 | * @see org.greenstone.gatherer.collection.DeleteCollectionPrompt.ConfirmationCheckBoxListener
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81 | * @see org.greenstone.gatherer.collection.DeleteCollectionPrompt.OKButtonListener
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82 | */
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83 | public DeleteCollectionPrompt() {
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84 | super();
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85 | this.close_button = new JButton(get("General.Close", null));
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86 | this.confirmation = new JCheckBox(get("Confirm_Delete", null));
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87 | this.details = new JTextArea();
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88 | this.details_label = new JLabel(get("Collection_Details", null));
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89 | this.list = new JList();
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90 | this.list_label = new JLabel(get("Collection_List", null));
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91 | this.list_model = new DefaultListModel();
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92 | this.ok_button = new JButton(get("General.OK", null));
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93 | this.prompt = this;
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94 | this.setModal(true);
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95 | this.setSize(SIZE);
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96 | this.setTitle(get("Title", null));
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97 | close_button.addActionListener(new CloseButtonListener());
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98 | confirmation.addActionListener(new ConfirmationCheckBoxListener());
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99 | confirmation.setEnabled(false);
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100 | confirmation.setSelected(false);
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101 | details.setFont(Gatherer.config.getFont("general.tooltip_font", false));
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102 | details.setText(get("No_Collection", null));
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103 | list.addListSelectionListener(new CollectionListListener());
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104 | list.clearSelection();
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105 | list.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
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106 | list.setModel(list_model);
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107 | ok_button.addActionListener(new OKButtonListener());
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108 | ok_button.setEnabled(false);
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109 | scanForCollections();
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110 | }
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111 | /** Destructor. */
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112 | public void destroy() {
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113 | close_button = null;
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114 | confirmation = null;
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115 | details = null;
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116 | details_label = null;
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117 | list_model.clear();
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118 | list_model = null;
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119 | list = null;
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120 | ok_button = null;
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121 | prompt = null;
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122 | }
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123 | /** This method causes the modal prompt to be displayed. */
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124 | public void display() {
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125 | // Central pane
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126 | JPanel list_pane = new JPanel(new BorderLayout());
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127 | list_pane.add(list_label, BorderLayout.NORTH);
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128 | list_pane.add(new JScrollPane(list), BorderLayout.CENTER);
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129 | list_pane.setBorder(BorderFactory.createEmptyBorder(0, 0, 5, 0));
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130 |
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131 | JPanel details_pane = new JPanel(new BorderLayout());
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132 | details_pane.add(details_label, BorderLayout.NORTH);
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133 | details_pane.add(new JScrollPane(details), BorderLayout.CENTER);
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134 | details_pane.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
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135 |
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136 | JPanel central_pane = new JPanel(new GridLayout(2, 1));
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137 | central_pane.add(list_pane);
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138 | central_pane.add(details_pane);
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139 | central_pane.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
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140 |
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141 | // Lower pane
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142 | JPanel confirmation_pane = new JPanel(new BorderLayout());
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143 | confirmation_pane.add(confirmation, BorderLayout.CENTER);
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144 | confirmation_pane.setBorder(BorderFactory.createEmptyBorder(0,0,5,0));
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145 |
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146 | JPanel button_pane = new JPanel(new GridLayout(1, 2));
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147 | button_pane.add(ok_button);
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148 | button_pane.add(close_button);
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149 | button_pane.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
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150 |
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151 | JPanel lower_pane = new JPanel(new BorderLayout());
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152 | lower_pane.add(confirmation_pane, BorderLayout.NORTH);
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153 | lower_pane.add(button_pane, BorderLayout.SOUTH);
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154 | lower_pane.setBorder(BorderFactory.createEmptyBorder(0, 5, 5, 5));
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155 |
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156 | // Final.
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157 | JPanel content_pane = (JPanel)this.getContentPane();
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158 | content_pane.setLayout(new BorderLayout());
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159 | content_pane.add(central_pane, BorderLayout.CENTER);
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160 | content_pane.add(lower_pane, BorderLayout.SOUTH);
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161 |
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162 | // Center and display.
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163 | Dimension screen_size = Gatherer.config.screen_size;
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164 | this.setLocation((screen_size.width - SIZE.width) / 2, (screen_size.height - SIZE.height) / 2);
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165 | this.show();
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166 | }
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167 | /** Shows a delete complete prompt.
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168 | * @param success A <strong>boolean</strong> indicating if the collection was successfully deleted.
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169 | * @see org.greenstone.gatherer.collection.Collection
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170 | */
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171 | public void resultPrompt(boolean success) {
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172 | args = new String[1];
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173 | args[0] = collection.getName();
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174 | if(success) {
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175 | JOptionPane.showMessageDialog(prompt,get("Successful_Delete", args),get("Successful_Title", null),JOptionPane.INFORMATION_MESSAGE);
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176 | }
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177 | else {
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178 | JOptionPane.showMessageDialog(prompt,get("Failed_Delete", args),get("Failed_Title", null),JOptionPane.WARNING_MESSAGE);
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179 | }
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180 | }
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181 | /** Retrieves a phrase from the <strong>Dictionary</strong> in <strong>Gatherer</strong>.
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182 | * @param key A <strong>String</strong> used to match against a specific phrase in the dictionary.
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183 | * @see org.greenstone.gatherer.Dictionary
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184 | * @see org.greenstone.gatherer.Gatherer
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185 | */
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186 | private String get(String key, String args[]) {
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187 | if(key.indexOf(".") == -1) {
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188 | key = "DeleteCollectionPrompt." + key;
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189 | }
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190 | return Gatherer.dictionary.get(key, args);
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191 | }
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192 | /** Attempts to load the given collection. Currently uses simple
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193 | * serialization of the collection class.
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194 | * @param location The path to the serialized collection.
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195 | */
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196 | public Collection loadCollection(File file) {
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197 | Collection col = null;
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198 | try {
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199 | FileInputStream fis = new FileInputStream(file);
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200 | BufferedInputStream bin = new BufferedInputStream(fis);
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201 | ObjectInputStream input = new ObjectInputStream(bin);
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202 | col = (Collection) input.readObject();
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203 | input.close();
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204 | input = null;
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205 | bin.close();
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206 | bin = null;
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207 | fis.close();
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208 | fis = null;
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209 | }
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210 | catch (Exception error) {
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211 | error.printStackTrace();
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212 | }
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213 | return col;
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214 | }
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215 | /** Method to scan the collect directory retrieving and reloading each collection it finds, while building the list of known collections.
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216 | * @see org.greenstone.gatherer.Configuration
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217 | * @see org.greenstone.gatherer.Gatherer
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218 | * @see org.greenstone.gatherer.util.ArrayTools
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219 | * @see org.greenstone.gatherer.util.Utility
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220 | */
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221 | private void scanForCollections() {
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222 | // Start at the collect dir.
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223 | String collect_directory_name = Utility.getCollectionDir(Gatherer.config.gsdl_path);
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224 | File collect_directory = new File(collect_directory_name);
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225 | if(collect_directory.exists()) {
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226 | // Now for each child directory see if it contains a .col file and
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227 | // if so try to load it..
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228 | File collections[] = collect_directory.listFiles();
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229 | ArrayTools.sort(collections);
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230 | for(int i = 0; collections != null && i < collections.length; i++) {
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231 | File children[] = collections[i].listFiles();
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232 | for(int j = 0; children != null && j < children.length; j++) {
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233 | if(children[j].getAbsolutePath().endsWith(".col")) {
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234 | Collection col = loadCollection(children[j]);
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235 | // If we've actually loaded
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236 | if(col != null) {
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237 | list_model.addElement(col);
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238 | }
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239 | }
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240 | }
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241 | }
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242 | }
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243 | // Otherwise the collect directory doesn't actually exist, so there ain't much we can do.
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244 | }
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245 | /** A button listener implementation, which listens for actions on the close button and disposes of the dialog when detected. */
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246 | private class CloseButtonListener
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247 | implements ActionListener {
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248 | /** Any implementation of ActionListener must include this method so we can be informed when the button is actioned.
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249 | * @param event An <strong>ActionEvent</strong> containing all the relevant information garnered from the event itself.
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250 | */
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251 | public void actionPerformed(ActionEvent event) {
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252 | prompt.dispose();
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253 | }
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254 | }
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255 | /** This private class listens for selection events in from the list and then displays the appropriate details for that collection.
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256 | */
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257 | private class CollectionListListener
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258 | implements ListSelectionListener {
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259 | /** Any implementation of ListSelectionListener must include this method so we can be informed when the list selection changes.
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260 | * @param event A <strong>ListSelectionEvent</strong> containing all the relevant information garnered from the event itself.
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261 | */
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262 | public void valueChanged(ListSelectionEvent event) {
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263 | if(!list.isSelectionEmpty()) {
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264 | confirmation.setEnabled(true);
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265 | collection = (Collection) list.getSelectedValue();
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266 | args = new String[4];
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267 | args[0] = collection.getTitle();
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268 | args[1] = collection.getName();
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269 | args[2] = collection.getEmail();
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270 | args[3] = collection.getDescription();
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271 | details.setText(get("Details", args));
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272 | }
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273 | else {
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274 | confirmation.setEnabled(false);
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275 | details.setText(get("No_Collection", null));
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276 | }
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277 | }
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278 | }
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279 | /** A check box listener so we can tell if the users selected confirm. */
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280 | private class ConfirmationCheckBoxListener
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281 | implements ActionListener {
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282 | /** Any implementation of ActionListener must include this method so we can be informed when the button is actioned.
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283 | * @param event An <strong>ActionEvent</strong> containing all the relevant information garnered from the event itself.
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284 | */
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285 | public void actionPerformed(ActionEvent event) {
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286 | if(confirmation.isSelected()) {
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287 | ok_button.setEnabled(true);
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288 | }
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289 | else {
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290 | ok_button.setEnabled(false);
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291 | }
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292 | }
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293 | }
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294 | /** The OK button listener implementation. */
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295 | private class OKButtonListener
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296 | implements ActionListener {
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297 | /** Any implementation of ActionListener must include this method so we can be informed when the button is actioned.
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298 | * @param event An <strong>ActionEvent</strong> containing all the relevant information garnered from the event itself.
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299 | * @see org.greenstone.gatherer.Configuration
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300 | * @see org.greenstone.gatherer.Gatherer
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301 | * @see org.greenstone.gatherer.util.Utility
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302 | */
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303 | public void actionPerformed(ActionEvent event) {
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304 | // Delete the selected collection.
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305 | File delete_me = new File(Utility.getCollectionDir(Gatherer.config.gsdl_path) + collection.getName() + File.separator);
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306 | if(Utility.delete(delete_me)) {
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307 | resultPrompt(true);
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308 | list_model.removeElement(collection);
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309 | details.setText(get("No_Collection", null));
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310 | confirmation.setEnabled(false);
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311 | confirmation.setSelected(false);
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312 | ok_button.setEnabled(false);
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313 | collection = null;
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314 | }
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315 | else {
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316 | resultPrompt(false);
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317 | }
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318 | }
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319 | }
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320 | }
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321 |
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322 |
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