1 | /*
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2 | * SimpleDocumentDatabase.java
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3 | * Copyright (C) 2002 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.util;
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19 |
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20 | // Greenstone classes
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21 | import org.greenstone.gsdl3.util.OID;
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22 | import org.greenstone.gsdl3.util.DBInfo;
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23 | import org.greenstone.gsdl3.util.GSXML;
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24 | import org.greenstone.gsdl3.util.SimpleCollectionDatabase;
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25 | import org.greenstone.gsdl3.util.GSFile;
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26 |
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27 | // XML classes
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28 | import org.w3c.dom.Document;
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29 | import org.w3c.dom.Element;
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30 | import org.w3c.dom.NodeList;
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31 |
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32 | // java
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33 | import java.util.Vector;
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34 | import java.util.ArrayList;
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35 | import java.util.HashMap;
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36 | import java.util.Map;
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37 | import java.util.Set;
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38 | import java.util.Iterator;
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39 | import java.io.File;
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40 |
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41 | import org.apache.log4j.*;
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42 |
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43 | public class SimpleDocumentDatabase extends AbstractSimpleDocument
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44 | {
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45 | // collection database
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46 | protected SimpleCollectionDatabase coll_db = null;
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47 |
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48 | static Logger logger = Logger.getLogger(org.greenstone.gsdl3.util.SimpleDocumentDatabase.class.getName());
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49 |
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50 |
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51 | /** constructor */
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52 | public SimpleDocumentDatabase(Document doc,
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53 | String database_type, String site_home,
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54 | String cluster_name, String index_stem)
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55 | {
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56 | super(doc);
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57 |
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58 | coll_db = new SimpleCollectionDatabase(database_type);
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59 | if (!coll_db.databaseOK()) {
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60 | logger.error("Couldn't create the collection database of type "+database_type);
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61 | }
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62 |
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63 | // Open database for querying
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64 | String coll_db_file = GSFile.collectionDatabaseFile(site_home, cluster_name, index_stem, database_type);
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65 | if (!this.coll_db.openDatabase(coll_db_file, SimpleCollectionDatabase.READ)) {
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66 | logger.error("Could not open collection database!");
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67 | coll_db = null;
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68 | }
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69 | }
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70 |
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71 | public boolean isValid()
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72 | {
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73 | return (coll_db != null);
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74 | }
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75 |
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76 | public void cleanUp() {
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77 | this.coll_db.closeDatabase();
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78 | }
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79 |
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80 |
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81 | public DBInfo getInfo(String main_key) {
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82 | if (this.coll_db==null) {
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83 | // Most likely cause is that this installation of Greenstone3 has not
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84 | // been compiled with support for this database type
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85 | return null;
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86 | }
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87 |
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88 | return coll_db.getInfo(main_key);
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89 | }
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90 |
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91 |
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92 | /** returns the document type of the doc that the specified node
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93 | belongs to. should be one of
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94 | GSXML.DOC_TYPE_SIMPLE,
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95 | GSXML.DOC_TYPE_PAGED,
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96 | GSXML.DOC_TYPE_HIERARCHY
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97 | */
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98 | public String getDocType(String node_id){
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99 | DBInfo info = this.coll_db.getInfo(node_id);
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100 | if (info == null) {
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101 | return GSXML.DOC_TYPE_SIMPLE;
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102 | }
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103 | String doc_type = info.getInfo("doctype");
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104 | if (!doc_type.equals("")&&!doc_type.equals("doc")) {
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105 | return doc_type;
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106 | }
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107 |
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108 | String top_id = OID.getTop(node_id);
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109 | boolean is_top = (top_id.equals(node_id) ? true : false);
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110 |
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111 | String children = info.getInfo("contains");
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112 | boolean is_leaf = (children.equals("") ? true : false);
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113 |
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114 | if (is_top && is_leaf) { // a single section document
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115 | return GSXML.DOC_TYPE_SIMPLE;
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116 | }
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117 |
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118 | // now we just check the top node
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119 | if (!is_top) { // we need to look at the top info
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120 | info = this.coll_db.getInfo(top_id);
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121 | }
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122 | if (info == null) {
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123 | return GSXML.DOC_TYPE_HIERARCHY;
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124 | }
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125 |
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126 | String childtype = info.getInfo("childtype");
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127 | if (childtype.equals("Paged")) {
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128 | return GSXML.DOC_TYPE_PAGED;
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129 | }
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130 | if (childtype.equals("PagedHierarchy"))
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131 | {
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132 | return GSXML.DOC_TYPE_PAGED_HIERARCHY;
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133 | }
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134 | return GSXML.DOC_TYPE_HIERARCHY;
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135 |
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136 | }
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137 |
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138 | /** returns true if the node has child nodes */
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139 | public boolean hasChildren(String node_id){
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140 | DBInfo info = this.coll_db.getInfo(node_id);
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141 | if (info == null) {
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142 | return false;
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143 | }
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144 | String contains = info.getInfo("contains");
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145 | if (contains.equals("")) {
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146 | return false;
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147 | }
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148 | return true;
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149 | }
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150 |
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151 | /** returns true if the node has a parent */
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152 | public boolean hasParent(String node_id){
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153 | String parent = OID.getParent(node_id);
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154 | if (parent.equals(node_id)) {
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155 | return false;
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156 | }
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157 | return true;
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158 | }
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159 |
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160 | /** convert indexer internal id to Greenstone oid */
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161 | public String internalNum2OID(long docnum)
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162 | {
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163 | return this.coll_db.docnum2OID(docnum);
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164 | }
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165 |
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166 | public String internalNum2OID(String docnum)
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167 | {
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168 | return this.coll_db.docnum2OID(docnum);
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169 | }
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170 |
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171 | }
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172 |
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173 |
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