1 | /**
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2 | *#########################################################################
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3 | *
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4 | * A component of the Gatherer application, part of the Greenstone digital
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5 | * library suite from the New Zealand Digital Library Project at the
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6 | * University of Waikato, New Zealand.
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7 | *
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8 | * <BR><BR>
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9 | *
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10 | * Author: John Thompson, Greenstone Digital Library, University of Waikato
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11 | *
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12 | * <BR><BR>
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13 | *
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14 | * Copyright (C) 1999 New Zealand Digital Library Project
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15 | *
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16 | * <BR><BR>
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17 | *
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18 | * This program is free software; you can redistribute it and/or modify
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19 | * it under the terms of the GNU General Public License as published by
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20 | * the Free Software Foundation; either version 2 of the License, or
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21 | * (at your option) any later version.
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22 | *
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23 | * <BR><BR>
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24 | *
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25 | * This program is distributed in the hope that it will be useful,
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26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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28 | * GNU General Public License for more details.
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29 | *
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30 | * <BR><BR>
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31 | *
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32 | * You should have received a copy of the GNU General Public License
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33 | * along with this program; if not, write to the Free Software
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34 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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35 | *########################################################################
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36 | */
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37 | package org.greenstone.gatherer.util;
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38 |
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39 | import java.io.*;
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40 | import java.lang.*;
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41 | import java.net.*;
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42 | import java.util.*;
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43 |
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44 | /**
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45 | * Extends the standard URL class to include several new data elements and
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46 | * the ability to take a string and parse a valid url.
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47 | */
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48 | public class GURL
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49 | implements Serializable {
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50 |
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51 | private Integer type;
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52 |
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53 | private URL url;
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54 |
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55 | private String file;
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56 | private String host;
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57 | private String path;
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58 | private String protocol;
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59 | private String title = "empty";
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60 |
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61 | /** This Vector maintains a record of the url links from within
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62 | * this resource, and their type (EXTERNAL vs INTERNAL). Internal
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63 | * links can be 'hidden' from the user if desired, or a user can
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64 | * opt to have all internal links automatically moved into a
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65 | * collection if the page that depends upon them is moved. <BR>
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66 | * Each entry in the vector is of the form.
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67 | * links[i] = String url
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68 | * links[i+1] = int type
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69 | */
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70 | private Vector links;
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71 |
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72 | /* Static Integer identifiers for ease of use. */
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73 | static final public Integer INTERNAL = new Integer(0);
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74 | static final public Integer EXTERNAL = new Integer(1);
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75 |
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76 | public GURL(String url_str) {
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77 | this(url_str, GURL.EXTERNAL);
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78 | }
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79 |
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80 | public GURL(URL url) {
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81 | this(url, GURL.EXTERNAL);
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82 | }
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83 |
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84 | public GURL(URL url, Integer type) {
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85 | this.type = type;
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86 | this.url = url;
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87 | }
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88 |
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89 | public GURL(String url_str, Integer type) {
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90 | this.type = type;
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91 |
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92 | try {
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93 | if(!url_str.startsWith("file:") && url_str.indexOf("://") == -1) {
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94 | url_str = "http://" + url_str;
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95 | }
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96 | url = new URL(url_str);
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97 | }
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98 | catch (MalformedURLException e) {
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99 | // Fix it
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100 | }
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101 | }
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102 |
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103 | public void addLink(String url) {
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104 | addLink(url, GURL.EXTERNAL);
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105 | }
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106 |
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107 | public void addLink(String url, Integer type) {
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108 | if(links == null) {
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109 | links = new Vector();
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110 | }
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111 | links.add(url);
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112 | links.add(type);
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113 | }
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114 |
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115 | /** Used by tree renderer to display name. So we'll only return the
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116 | * filename.
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117 | */
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118 | public String getFile() {
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119 | return parseFile(url.getFile());
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120 | }
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121 |
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122 | public String getHost() {
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123 | return url.getHost();
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124 | }
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125 |
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126 | public String getPath() {
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127 | return getHost() + parsePath(url.getFile());
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128 | }
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129 |
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130 | public int getPort() {
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131 | return url.getPort();
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132 | }
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133 |
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134 | public String getProtocol() {
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135 | String protocol = url.getProtocol();
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136 | if(protocol.equals("file")) {
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137 | return protocol + ":";
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138 | }
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139 | return protocol + "://";
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140 | }
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141 |
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142 | public URL getURL() {
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143 | return url;
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144 | }
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145 |
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146 | public String toString() {
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147 | return url.toString();
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148 | }
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149 |
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150 | public boolean valid() {
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151 | return (url != null);
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152 | }
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153 |
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154 | private String parseFile(String raw) {
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155 | if(raw != null && !raw.equals("")) {
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156 | // Remove everything upto and including the last '/'
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157 | if(raw.indexOf("/") != -1) {
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158 | return raw.substring(raw.lastIndexOf("/") + 1);
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159 | }
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160 | }
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161 | return raw;
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162 | }
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163 |
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164 | private String parsePath(String raw) {
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165 | if(raw != null && !raw.equals("")) {
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166 | // Remove everything after the last "/"
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167 | if(raw.indexOf("/") != -1) {
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168 | return raw.substring(0, raw.lastIndexOf("/"));
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169 | }
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170 | }
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171 | return raw;
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172 | }
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173 | }
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