[24395] | 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 | return GSXML.DOC_TYPE_HIERARCHY;
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| 131 |
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| 132 | }
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| 133 |
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| 134 | /** returns true if the node has child nodes */
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| 135 | public boolean hasChildren(String node_id){
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| 136 | DBInfo info = this.coll_db.getInfo(node_id);
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| 137 | if (info == null) {
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| 138 | return false;
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| 139 | }
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| 140 | String contains = info.getInfo("contains");
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| 141 | if (contains.equals("")) {
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| 142 | return false;
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| 143 | }
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| 144 | return true;
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| 145 | }
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| 146 |
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| 147 | /** returns true if the node has a parent */
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| 148 | public boolean hasParent(String node_id){
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| 149 | String parent = OID.getParent(node_id);
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| 150 | if (parent.equals(node_id)) {
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| 151 | return false;
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| 152 | }
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| 153 | return true;
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| 154 | }
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| 155 |
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| 156 | /** convert indexer internal id to Greenstone oid */
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| 157 | public String internalNum2OID(long docnum)
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| 158 | {
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| 159 | return this.coll_db.docnum2OID(docnum);
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| 160 | }
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| 161 |
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| 162 | public String internalNum2OID(String docnum)
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| 163 | {
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| 164 | return this.coll_db.docnum2OID(docnum);
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| 165 | }
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| 166 |
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| 167 | }
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| 168 |
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| 169 |
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