1 | /*
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2 | * GS3MGPPSearch.java
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3 | * Copyright (C) 2005 New Zealand Digital Library, http://www.nzdl.org
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4 | *
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5 | * This program is free software; you can redistribute it and/or modify
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6 | * the Free Software Foundation; either version 2 of the License, or
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7 | * (at your option) any later version.
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8 | *
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9 | * This program is distributed in the hope that it will be useful,
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 | * GNU General Public License for more details.
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13 | *
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14 | * You should have received a copy of the GNU General Public License
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15 | * along with this program; if not, write to the Free Software
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16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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17 | */
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18 | package org.greenstone.gsdl3.service;
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19 |
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20 | // Greenstone classes
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21 | import org.greenstone.mg.*;
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22 | import org.greenstone.gsdl3.util.GSXML;
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23 | import org.greenstone.gsdl3.util.GS3OID;
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24 | import org.greenstone.gsdl3.util.SQLQuery;
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25 |
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26 | // XML classes
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27 | import org.w3c.dom.Document;
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28 | import org.w3c.dom.Element;
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29 | import org.w3c.dom.NodeList;
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30 |
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31 | // java classes
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32 | import java.io.File;
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33 |
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34 |
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35 | /**
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36 | *
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37 | * @author <a href="mailto:[email protected]">Katherine Don</a>
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38 | */
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39 |
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40 | public class GS3MGPPSearch
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41 | extends AbstractMGPPSearch
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42 | {
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43 | protected SQLQuery database = null;
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44 | /** the base index prefix */
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45 | protected String base_index_prefix = null;
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46 |
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47 |
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48 | /** constructor */
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49 | public GS3MGPPSearch()
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50 | {
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51 | this.database = new SQLQuery();
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52 | }
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53 |
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54 | public void cleanUp() {
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55 | super.cleanUp();
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56 | this.database.closeConnection();
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57 | }
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58 |
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59 | /** configure this service */
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60 | public boolean configure(Element info, Element extra_info)
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61 | {
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62 |
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63 | // get the base prefix
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64 | Element def = (Element) GSXML.getChildByTagName(info, "baseIndexPrefix");
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65 | if (def != null) {
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66 | this.base_index_prefix = def.getAttribute(GSXML.NAME_ATT);
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67 | }
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68 | if (this.base_index_prefix == null || this.base_index_prefix.equals("")) {
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69 | System.err.println("Error: base index prefix not specified!");
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70 | return false;
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71 | }
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72 | String site_name = this.site_home.substring(this.site_home.lastIndexOf(File.separator)+1);
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73 | if (site_name.equals("")) {
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74 | System.err.println("GS3Search Error: Cannot extract the site name from site home: "+this.site_home);
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75 | return false;
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76 | }
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77 | if (!database.setDatabase(site_name+"_"+this.cluster_name)) {
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78 | System.err.println("GS3Search Error: Could not open SQL database!");
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79 | return false;
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80 | }
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81 |
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82 | return super.configure(info, extra_info);
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83 | }
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84 | /** returns the document type of the doc that the specified node
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85 | belongs to. should be one of
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86 | GSXML.DOC_TYPE_SIMPLE,
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87 | GSXML.DOC_TYPE_PAGED,
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88 | GSXML.DOC_TYPE_HIERARCHY
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89 | */
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90 | protected String getDocType(String node_id){
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91 | boolean hierarchical = false;
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92 | if (!GS3OID.isDocTop(node_id) || database.isHierarchicalDocument(node_id) ) {
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93 | hierarchical = true;
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94 | }
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95 | // what about paged???
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96 | if (!hierarchical) {
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97 | // a simple document
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98 | return GSXML.DOC_TYPE_SIMPLE;
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99 | } else {
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100 | // a hierarchical doc
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101 | return GSXML.DOC_TYPE_HIERARCHY;
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102 | }
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103 | // don't have paged yet.
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104 |
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105 | }
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106 |
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107 | /** returns true if the node has child nodes */
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108 | protected boolean hasChildren(String node_id){
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109 | return database.documentHasChildren(node_id);
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110 | }
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111 |
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112 | /** returns true if the node has a parent */
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113 | protected boolean hasParent(String node_id){
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114 | String parent = GS3OID.getParent(node_id);
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115 | if (parent.equals(node_id)) {
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116 | return false;
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117 | }
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118 | return true;
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119 | }
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120 |
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121 | /** convert MGPP internal id to Greenstone oid */
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122 | protected String MGPPNum2OID(long docnum)
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123 | {
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124 | String mg_id = this.base_index_prefix+"."+docnum;
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125 | String doc_id = database.MGNum2OID(mg_id);
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126 | // hack !!!
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127 | if (doc_id.endsWith("-All")) {
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128 | // get rid of the All bit
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129 | doc_id = doc_id.substring(0,doc_id.length()-4);
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130 | //doc_id=doc_id.replaceAll("All","1");
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131 | }
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132 | return doc_id;
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133 |
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134 | }
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135 |
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136 | }
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137 |
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138 |
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