[8959] | 1 | /*
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| 2 | * AbstractGS2DocumentRetrieve.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 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation; either version 2 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program; if not, write to the Free Software
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| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 18 | */
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| 19 | package org.greenstone.gsdl3.service;
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| 20 |
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| 21 | // Greenstone classes
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[9874] | 22 | import org.greenstone.gsdl3.core.GSException;
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[8959] | 23 | import org.greenstone.gsdl3.util.GSXML;
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| 24 | import org.greenstone.gsdl3.util.GSFile;
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| 25 | import org.greenstone.gsdl3.util.OID;
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| 26 | import org.greenstone.gsdl3.util.MacroResolver;
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| 27 | import org.greenstone.gsdl3.util.GS2MacroResolver;
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| 28 | import org.greenstone.gsdl3.util.GSConstants;
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[15326] | 29 | import org.greenstone.gsdl3.util.SimpleCollectionDatabase;
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[9874] | 30 | import org.greenstone.gsdl3.util.DBInfo;
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[8959] | 31 | // XML classes
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| 32 | import org.w3c.dom.Document;
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| 33 | import org.w3c.dom.Element;
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| 34 | import org.w3c.dom.NodeList;
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| 35 |
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| 36 | // General Java classes
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| 37 | import java.io.File;
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| 38 | import java.util.StringTokenizer;
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| 39 | import java.util.Vector;
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| 40 | import java.util.Set;
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| 41 | import java.util.Iterator;
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| 42 | import java.util.ArrayList;
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| 43 |
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[13124] | 44 | import org.apache.log4j.*;
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| 45 |
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[8959] | 46 | /** Implements the generic retrieval and classifier services for GS2
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| 47 | * collections.
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| 48 | *
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[21663] | 49 | * @author Katherine Don
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| 50 | * @author Michael Dewsnip
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[8959] | 51 | */
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| 52 |
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| 53 | public abstract class AbstractGS2DocumentRetrieve
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| 54 | extends AbstractDocumentRetrieve {
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| 55 |
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[13270] | 56 | static Logger logger = Logger.getLogger(org.greenstone.gsdl3.service.AbstractGS2DocumentRetrieve.class.getName());
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[13124] | 57 |
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[9000] | 58 | // protected static final String EXTLINK_PARAM = "ext"; here or in base??
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| 59 | protected String index_stem = null;
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| 60 |
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[15326] | 61 | protected SimpleCollectionDatabase coll_db = null;
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[8959] | 62 |
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| 63 |
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| 64 | /** constructor */
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| 65 | protected AbstractGS2DocumentRetrieve()
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| 66 | {
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[15754] | 67 | this.macro_resolver = new GS2MacroResolver();
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[8959] | 68 | }
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| 69 |
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[9874] | 70 | public void cleanUp() {
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[15326] | 71 | super.cleanUp();
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| 72 | this.coll_db.closeDatabase();
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[9874] | 73 | }
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[8959] | 74 | /** configure this service */
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| 75 | public boolean configure(Element info, Element extra_info)
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| 76 | {
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[10093] | 77 | if (!super.configure(info, extra_info)){
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| 78 | return false;
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| 79 | }
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[11265] | 80 |
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[13124] | 81 | logger.info("Configuring AbstractGS2DocumentRetrieve...");
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[8959] | 82 | //this.config_info = info;
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[9000] | 83 |
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| 84 | // the index stem is either specified in the config file or is the collection name
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[10651] | 85 | Element index_stem_elem = (Element) GSXML.getChildByTagName(info, GSXML.INDEX_STEM_ELEM);
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[9000] | 86 | if (index_stem_elem != null) {
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| 87 | this.index_stem = index_stem_elem.getAttribute(GSXML.NAME_ATT);
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| 88 | }
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| 89 | if (this.index_stem == null || this.index_stem.equals("")) {
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[13124] | 90 | logger.error("AbstractGS2DocumentRetrieve.configure(): indexStem element not found, stem will default to collection name");
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[9000] | 91 | this.index_stem = this.cluster_name;
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| 92 | }
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[10651] | 93 |
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[15326] | 94 | // find out what kind of database we have
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| 95 | Element database_type_elem = (Element) GSXML.getChildByTagName(info, GSXML.DATABASE_TYPE_ELEM);
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| 96 | String database_type = null;
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| 97 | if (database_type_elem != null) {
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| 98 | database_type = database_type_elem.getAttribute(GSXML.NAME_ATT);
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| 99 | }
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| 100 | if (database_type == null || database_type.equals("")) {
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| 101 | database_type = "gdbm"; // the default
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| 102 | }
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| 103 | coll_db = new SimpleCollectionDatabase(database_type);
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[22974] | 104 | if (!coll_db.databaseOK()) {
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[15326] | 105 | logger.error("Couldn't create the collection database of type "+database_type);
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| 106 | return false;
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| 107 | }
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| 108 |
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| 109 | // Open database for querying
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| 110 | String coll_db_file = GSFile.collectionDatabaseFile(this.site_home, this.cluster_name, this.index_stem, database_type);
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| 111 | if (!this.coll_db.openDatabase(coll_db_file, SimpleCollectionDatabase.READ)) {
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| 112 | logger.error("Could not open collection database!");
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[10651] | 113 | return false;
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| 114 | }
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| 115 |
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[15770] | 116 | // we need to set the database for our GS2 macro resolver
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| 117 | GS2MacroResolver gs2_macro_resolver = (GS2MacroResolver)this.macro_resolver;
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| 118 | gs2_macro_resolver.setDB(this.coll_db);
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| 119 |
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[10093] | 120 | return true;
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[8959] | 121 | }
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| 122 |
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| 123 | /** if id ends in .fc, .pc etc, then translate it to the correct id */
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| 124 | protected String translateId(String node_id) {
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[22319] | 125 | return OID.translateOID(this.coll_db, node_id); //return this.coll_db.translateOID(node_id);
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[8959] | 126 | }
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| 127 |
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| 128 | /** if an id is not a greenstone id (an external id) then translate
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| 129 | it to a greenstone one*/
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| 130 | protected String translateExternalId(String node_id){
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[15326] | 131 | return this.coll_db.externalId2OID(node_id);
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[8959] | 132 | }
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| 133 |
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| 134 | /** returns the id of the root node of the document containing node node_id. . may be the same as node_id */
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| 135 | protected String getRootId(String node_id) {
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| 136 | return OID.getTop(node_id);
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| 137 | }
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| 138 | /** returns a list of the child ids in order, null if no children */
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| 139 | protected ArrayList getChildrenIds(String node_id) {
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[15326] | 140 | DBInfo info = this.coll_db.getInfo(node_id);
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[8959] | 141 | if (info == null) {
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| 142 | return null;
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| 143 | }
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| 144 |
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| 145 | String contains = info.getInfo("contains");
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| 146 | if (contains.equals("")) {
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| 147 | return null;
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| 148 | }
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| 149 | ArrayList children = new ArrayList();
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| 150 | StringTokenizer st = new StringTokenizer(contains, ";");
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| 151 | while (st.hasMoreTokens()) {
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| 152 | String child_id = st.nextToken().replaceAll("\"", node_id);
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| 153 | children.add(child_id);
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| 154 | }
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| 155 | return children;
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| 156 |
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| 157 | }
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| 158 | /** returns the node id of the parent node, null if no parent */
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| 159 | protected String getParentId(String node_id){
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| 160 | String parent = OID.getParent(node_id);
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| 161 | if (parent.equals(node_id)) {
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| 162 | return null;
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| 163 | }
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| 164 | return parent;
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| 165 | }
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| 166 |
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| 167 | /** get the metadata for the classifier node node_id
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| 168 | * returns a metadataList element:
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| 169 | * <metadataList><metadata name="xxx">value</metadata></metadataList>
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| 170 | */
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| 171 | // assumes only one value per metadata
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| 172 | protected Element getMetadataList(String node_id, boolean all_metadata,
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[9874] | 173 | ArrayList metadata_names)
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| 174 | throws GSException {
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[8959] | 175 | Element metadata_list = this.doc.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
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[15326] | 176 | DBInfo info = this.coll_db.getInfo(node_id);
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[8959] | 177 | if (info == null) {
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| 178 | return null;
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| 179 | }
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| 180 | String lang = "en"; // why do we need this??
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| 181 | if (all_metadata) {
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| 182 | // return everything out of the database
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| 183 | Set keys = info.getKeys();
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| 184 | Iterator it = keys.iterator();
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| 185 | while(it.hasNext()) {
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| 186 | String key = (String)it.next();
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[10334] | 187 | //String value = info.getInfo(key);
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| 188 | Vector values = info.getMultiInfo(key);
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| 189 | for(int i=0; i<values.size(); i++) {
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| 190 | GSXML.addMetadata(this.doc, metadata_list, key, this.macro_resolver.resolve((String)values.elementAt(i), lang, MacroResolver.SCOPE_META, node_id));
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| 191 | }
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[8959] | 192 | }
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| 193 |
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| 194 | } else {
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| 195 | for (int i=0; i<metadata_names.size(); i++) {
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[14035] | 196 | String meta_name = (String) metadata_names.get(i);
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[8959] | 197 | String value = getMetadata(node_id, info, meta_name, lang);
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| 198 | GSXML.addMetadata(this.doc, metadata_list, meta_name, value);
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| 199 | }
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| 200 | }
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| 201 | return metadata_list;
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| 202 | }
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| 203 |
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| 204 | /** returns the structural information asked for.
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| 205 | * info_type may be one of
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| 206 | * INFO_NUM_SIBS, INFO_NUM_CHILDREN, INFO_SIB_POS
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| 207 | */
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| 208 | protected String getStructureInfo(String doc_id, String info_type) {
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| 209 | String value="";
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| 210 | if (info_type.equals(INFO_NUM_SIBS)) {
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| 211 | String parent_id = OID.getParent(doc_id);
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| 212 | if (parent_id.equals(doc_id)) {
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| 213 | value="0";
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| 214 | } else {
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| 215 | value = String.valueOf(getNumChildren(parent_id));
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| 216 | }
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| 217 | return value;
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| 218 | }
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| 219 |
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| 220 | if (info_type.equals(INFO_NUM_CHILDREN)) {
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| 221 | return String.valueOf(getNumChildren(doc_id));
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| 222 | }
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| 223 |
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| 224 |
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| 225 | if (info_type.equals(INFO_SIB_POS)) {
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| 226 | String parent_id = OID.getParent(doc_id);
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| 227 | if (parent_id.equals(doc_id)) {
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| 228 | return "-1";
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| 229 | }
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| 230 |
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[15326] | 231 | DBInfo info = this.coll_db.getInfo(parent_id);
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[8959] | 232 | if (info==null) {
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| 233 | return "-1";
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| 234 | }
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| 235 |
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| 236 | String contains = info.getInfo("contains");
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| 237 | contains = contains.replaceAll("\"", parent_id);
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| 238 | String [] children = contains.split(";");
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| 239 | for (int i=0;i<children.length;i++) {
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| 240 | String child_id = children[i];
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| 241 | if (child_id.equals(doc_id)) {
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| 242 | return String.valueOf(i+1); // make it from 1 to length
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| 243 |
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| 244 | }
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| 245 | }
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| 246 |
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| 247 | return "-1";
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| 248 | } else {
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| 249 | return null;
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| 250 | }
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| 251 |
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| 252 | }
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| 253 |
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| 254 | protected int getNumChildren(String node_id) {
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[15326] | 255 | DBInfo info = this.coll_db.getInfo(node_id);
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[8959] | 256 | if (info == null) {
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| 257 | return 0;
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| 258 | }
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| 259 | String contains = info.getInfo("contains");
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| 260 | if (contains.equals("")) {
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| 261 | return 0;
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| 262 | }
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| 263 | String [] children = contains.split(";");
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| 264 | return children.length;
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| 265 | }
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| 266 |
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| 267 | /** returns the document type of the doc that the specified node
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| 268 | belongs to. should be one of
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| 269 | GSXML.DOC_TYPE_SIMPLE,
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| 270 | GSXML.DOC_TYPE_PAGED,
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| 271 | GSXML.DOC_TYPE_HIERARCHY
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| 272 | */
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| 273 | protected String getDocType(String node_id) {
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[15326] | 274 | DBInfo info = this.coll_db.getInfo(node_id);
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[8959] | 275 | if (info == null) {
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| 276 | return GSXML.DOC_TYPE_SIMPLE;
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| 277 | }
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| 278 | String doc_type = info.getInfo("doctype");
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| 279 | if (!doc_type.equals("")&&!doc_type.equals("doc")) {
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| 280 | return doc_type;
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| 281 | }
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| 282 |
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| 283 | String top_id = OID.getTop(node_id);
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| 284 | boolean is_top = (top_id.equals(node_id) ? true : false);
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| 285 |
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| 286 | String children = info.getInfo("contains");
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| 287 | boolean is_leaf = (children.equals("") ? true : false);
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| 288 |
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| 289 | if (is_top && is_leaf) { // a single section document
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| 290 | return GSXML.DOC_TYPE_SIMPLE;
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| 291 | }
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| 292 |
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| 293 | // now we just check the top node
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| 294 | if (!is_top) { // we need to look at the top info
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[15326] | 295 | info = this.coll_db.getInfo(top_id);
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[8959] | 296 | }
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| 297 | if (info == null) {
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| 298 | return GSXML.DOC_TYPE_HIERARCHY;
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| 299 | }
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| 300 |
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| 301 | String childtype = info.getInfo("childtype");
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| 302 | if (childtype.equals("Paged")) {
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| 303 | return GSXML.DOC_TYPE_PAGED;
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| 304 | }
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| 305 | return GSXML.DOC_TYPE_HIERARCHY;
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| 306 | }
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| 307 |
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| 308 | /** returns the content of a node
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| 309 | * should return a nodeContent element:
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| 310 | * <nodeContent>text content or other elements</nodeContent>
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| 311 | */
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[13575] | 312 | abstract protected Element getNodeContent(String doc_id, String lang) throws GSException;
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[8959] | 313 |
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| 314 | protected String getMetadata(String node_id, DBInfo info,
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| 315 | String metadata, String lang) {
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| 316 | boolean multiple = false;
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| 317 | String relation = "";
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| 318 | String separator = ", ";
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| 319 | int pos = metadata.indexOf(GSConstants.META_RELATION_SEP);
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| 320 | if (pos ==-1) {
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[14035] | 321 | Vector values = info.getMultiInfo(metadata);
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[14185] | 322 | if (values !=null){
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| 323 | // just a plain meta entry eg dc.Title
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| 324 | StringBuffer result = new StringBuffer();
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| 325 | boolean first = true;
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| 326 | for (int i=0; i<values.size(); i++) {
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| 327 | if (first) {
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| 328 | first = false;
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| 329 | } else {
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| 330 | result.append(separator);
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| 331 | }
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| 332 | result.append(this.macro_resolver.resolve((String)values.elementAt(i), lang, MacroResolver.SCOPE_META, node_id));
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| 333 | }
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| 334 | return result.toString();
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| 335 | }
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| 336 | else{
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| 337 | String result = info.getInfo(metadata);
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| 338 | return this.macro_resolver.resolve(result, lang, MacroResolver.SCOPE_META, node_id);
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| 339 | }
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[8959] | 340 | }
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[14035] | 341 |
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[8959] | 342 | String temp = metadata.substring(0, pos);
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| 343 | metadata = metadata.substring(pos+1);
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| 344 | // check for all on the front
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| 345 | if (temp.equals("all")) {
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| 346 | multiple=true;
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| 347 | pos = metadata.indexOf(GSConstants.META_RELATION_SEP);
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| 348 | if (pos ==-1) {
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| 349 | temp = "";
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| 350 | } else {
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| 351 | temp = metadata.substring(0, pos);
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| 352 | metadata = metadata.substring(pos+1);
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| 353 | }
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| 354 | }
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| 355 |
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| 356 | // now check for relational info
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[15208] | 357 | if (temp.equals("parent") || temp.equals("root") || temp.equals( "ancestors")) { // "current" "siblings" "children" "descendants"
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[8959] | 358 | relation = temp;
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| 359 | pos = metadata.indexOf(GSConstants.META_RELATION_SEP);
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| 360 | if (pos == -1) {
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| 361 | temp = "";
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| 362 | } else {
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| 363 | temp = metadata.substring(0, pos);
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| 364 | metadata = metadata.substring(pos+1);
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| 365 | }
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| 366 | }
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| 367 |
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| 368 | // now look for separator info
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| 369 | if (temp.startsWith(GSConstants.META_SEPARATOR_SEP) && temp.endsWith(GSConstants.META_SEPARATOR_SEP)) {
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| 370 | separator = temp.substring(1, temp.length()-1);
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| 371 |
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| 372 | }
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| 373 |
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| 374 | String relation_id = node_id;
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| 375 | if (relation.equals("parent") || relation.equals("ancestors")) {
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| 376 | relation_id = OID.getParent(node_id);
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| 377 | // parent or ancestor does not include self
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| 378 | if (relation_id.equals(node_id)){
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| 379 | return "";
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| 380 | }
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| 381 | } else if (relation.equals("root")) {
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| 382 | relation_id = OID.getTop(node_id);
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| 383 | }
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| 384 |
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| 385 | // now we either have a single node, or we have ancestors
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| 386 | DBInfo relation_info;
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| 387 | if (relation_id.equals(node_id)) {
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| 388 | relation_info = info;
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| 389 | } else {
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[15326] | 390 | relation_info = this.coll_db.getInfo(relation_id);
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[8959] | 391 | }
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| 392 | if (relation_info == null) {
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| 393 | return "";
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| 394 | }
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| 395 |
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| 396 | StringBuffer result = new StringBuffer();
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| 397 |
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| 398 | if (!multiple) {
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| 399 | result.append(this.macro_resolver.resolve(relation_info.getInfo(metadata), lang, MacroResolver.SCOPE_META, relation_id));
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| 400 | } else {
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| 401 | // we have multiple meta
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| 402 | Vector values = relation_info.getMultiInfo(metadata);
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[14035] | 403 | if (values != null) {
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[8959] | 404 | boolean first = true;
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| 405 | for (int i=0; i<values.size(); i++) {
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| 406 | if (first) {
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| 407 | first = false;
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| 408 | } else {
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| 409 | result.append(separator);
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| 410 | }
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| 411 | result.append(this.macro_resolver.resolve((String)values.elementAt(i), lang, MacroResolver.SCOPE_META, relation_id));
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| 412 | }
|
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| 413 | }
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[14035] | 414 | logger.info(result);
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[8959] | 415 | }
|
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| 416 | // if not ancestors, then this is all we do
|
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| 417 | if (!relation.equals("ancestors")) {
|
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| 418 | return result.toString();
|
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| 419 | }
|
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| 420 |
|
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| 421 | // now do the ancestors
|
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| 422 | String current_id = relation_id;
|
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| 423 | relation_id = OID.getParent(current_id);
|
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| 424 | while (!relation_id.equals(current_id)) {
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[15326] | 425 | relation_info = this.coll_db.getInfo(relation_id);
|
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[8959] | 426 | if (relation_info == null) return result.toString();
|
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| 427 | if (!multiple) {
|
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| 428 | result.insert(0, separator);
|
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| 429 | result.insert(0, this.macro_resolver.resolve(relation_info.getInfo(metadata), lang, MacroResolver.SCOPE_META, relation_id));
|
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| 430 | } else {
|
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| 431 | Vector values = relation_info.getMultiInfo(metadata);
|
---|
| 432 | if (values != null) {
|
---|
| 433 | for (int i=values.size()-1; i>=0; i--) {
|
---|
| 434 | result.insert(0, separator);
|
---|
| 435 | result.insert(0, this.macro_resolver.resolve((String)values.elementAt(i), lang, MacroResolver.SCOPE_META, relation_id));
|
---|
| 436 | }
|
---|
| 437 | }
|
---|
| 438 |
|
---|
| 439 | }
|
---|
| 440 | current_id = relation_id;
|
---|
| 441 | relation_id = OID.getParent(current_id);
|
---|
| 442 | }
|
---|
| 443 | return result.toString();
|
---|
| 444 | }
|
---|
| 445 |
|
---|
| 446 |
|
---|
[15326] | 447 | /** needs to get info from collection database - if the calling code gets it already it may pay to pass it in instead */
|
---|
[8959] | 448 | protected String resolveTextMacros(String doc_content, String doc_id, String lang)
|
---|
| 449 | {
|
---|
| 450 | // resolve any collection specific macros
|
---|
| 451 | doc_content = macro_resolver.resolve(doc_content, lang, MacroResolver.SCOPE_TEXT, doc_id);
|
---|
| 452 | return doc_content;
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | protected Element getInfo(String doc_id, String info_type) {
|
---|
| 456 |
|
---|
| 457 | String value="";
|
---|
| 458 | if (info_type.equals(INFO_NUM_SIBS)) {
|
---|
| 459 | String parent_id = OID.getParent(doc_id);
|
---|
| 460 | if (parent_id.equals(doc_id)) {
|
---|
| 461 | value="0";
|
---|
| 462 | } else {
|
---|
| 463 | value = String.valueOf(getNumChildren(parent_id));
|
---|
| 464 | }
|
---|
| 465 | } else if (info_type.equals(INFO_NUM_CHILDREN)) {
|
---|
| 466 | value = String.valueOf(getNumChildren(doc_id));
|
---|
| 467 | } else if (info_type.equals(INFO_SIB_POS)) {
|
---|
| 468 | String parent_id = OID.getParent(doc_id);
|
---|
| 469 | if (parent_id.equals(doc_id)) {
|
---|
| 470 | value="-1";
|
---|
| 471 | } else {
|
---|
[15326] | 472 | DBInfo info = this.coll_db.getInfo(parent_id);
|
---|
[8959] | 473 | if (info==null) {
|
---|
| 474 | value ="-1";
|
---|
| 475 | } else {
|
---|
| 476 | String contains = info.getInfo("contains");
|
---|
| 477 | contains = contains.replaceAll("\"", parent_id);
|
---|
| 478 | String [] children = contains.split(";");
|
---|
| 479 | for (int i=0;i<children.length;i++) {
|
---|
| 480 | String child_id = children[i];
|
---|
| 481 | if (child_id.equals(doc_id)) {
|
---|
| 482 | value = String.valueOf(i+1); // make it from 1 to length
|
---|
| 483 | break;
|
---|
| 484 | }
|
---|
| 485 | }
|
---|
| 486 | }
|
---|
| 487 | }
|
---|
| 488 | } else {
|
---|
| 489 | return null;
|
---|
| 490 | }
|
---|
| 491 | Element info_elem = this.doc.createElement("info");
|
---|
| 492 | info_elem.setAttribute(GSXML.NAME_ATT, info_type);
|
---|
| 493 | info_elem.setAttribute(GSXML.VALUE_ATT, value);
|
---|
| 494 | return info_elem;
|
---|
| 495 | }
|
---|
| 496 |
|
---|
[14527] | 497 | protected String getHrefOID(String href_url){
|
---|
[15326] | 498 | return this.coll_db.docnum2OID(href_url);
|
---|
[14527] | 499 | }
|
---|
| 500 |
|
---|
[8959] | 501 | }
|
---|