[11014] | 1 | /*
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| 2 | * CrossCollectionSearch.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 | import org.greenstone.gsdl3.util.GSXML;
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| 22 | import org.greenstone.gsdl3.util.GSPath;
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[24993] | 23 | import org.greenstone.gsdl3.util.UserContext;
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[11014] | 24 |
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| 25 | import org.w3c.dom.Element;
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[16688] | 26 | import org.w3c.dom.Node;
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[11014] | 27 | import org.w3c.dom.NodeList;
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| 28 |
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| 29 | import java.util.ArrayList;
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| 30 | import java.util.Map;
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| 31 | import java.util.Iterator;
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| 32 | import java.util.Set;
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| 33 | import java.util.HashMap;
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| 34 |
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[13124] | 35 | import org.apache.log4j.*;
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[11014] | 36 |
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| 37 | /**
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[24979] | 38 | *
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[11014] | 39 | * @author <a href="mailto:[email protected]">Katherine Don</a>
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| 40 | */
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| 41 |
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[24979] | 42 | public class CrossCollectionSearch extends ServiceRack
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| 43 | {
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[11014] | 44 |
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[24979] | 45 | static Logger logger = Logger.getLogger(org.greenstone.gsdl3.service.CrossCollectionSearch.class.getName());
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| 46 | protected static final String QUERY_PARAM = "query";
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| 47 | protected static final String COLLECTION_PARAM = "collection";
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[11014] | 48 |
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[24979] | 49 | // the services on offer - these proxy the actual collection ones
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| 50 | protected static final String TEXT_QUERY_SERVICE = "TextQuery";
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| 51 | protected static final String ADV_QUERY_SERVICE = "AdvTextQuery";
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| 52 | protected static final String DOCUMENT_METADATA_RETRIEVE_SERVICE = "DocumentMetadataRetrieve";
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[11014] | 53 |
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[24979] | 54 | protected String[] coll_ids_list = null;
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| 55 | protected String[] coll_ids_list_no_all = null;
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| 56 | protected String[] coll_names_list = null;
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[11014] | 57 |
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[24979] | 58 | /** constructor */
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| 59 | public CrossCollectionSearch()
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| 60 | {
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| 61 | }
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[11014] | 62 |
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[24979] | 63 | public boolean configure(Element info, Element extra_info)
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| 64 | {
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| 65 | // any parameters? colls to include??
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| 66 | logger.info("Configuring CrossCollectionSearch...");
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| 67 | // query service
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| 68 | Element ccs_service = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 69 | ccs_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_QUERY);
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| 70 | ccs_service.setAttribute(GSXML.NAME_ATT, TEXT_QUERY_SERVICE);
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| 71 | this.short_service_info.appendChild(ccs_service);
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[11014] | 72 |
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[24979] | 73 | // metadata service
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| 74 | Element dmr_service = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 75 | dmr_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_RETRIEVE);
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| 76 | dmr_service.setAttribute(GSXML.NAME_ATT, DOCUMENT_METADATA_RETRIEVE_SERVICE);
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| 77 | this.short_service_info.appendChild(dmr_service);
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| 78 |
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| 79 | // get any format info
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| 80 | Element format_info = (Element) GSXML.getChildByTagName(info, GSXML.FORMAT_ELEM);
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| 81 | if (format_info != null)
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| 82 | {
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| 83 | this.format_info_map.put(TEXT_QUERY_SERVICE, this.doc.importNode(format_info, true));
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| 84 | }
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| 85 | else
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| 86 | {
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| 87 | // add in a default format statement
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| 88 | String format_string = "<format xmlns:gsf='http://www.greenstone.org/greenstone3/schema/ConfigFormat' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'><gsf:template match='documentNode'><td><a><xsl:attribute name='href'>?a=d&c=<xsl:value-of select='@collection'/>&d=<xsl:value-of select='@nodeID'/><xsl:if test=\"@nodeType='leaf'\">&sib=1</xsl:if>&dt=<xsl:value-of select='@docType'/>&p.a=q&p.s=" + TEXT_QUERY_SERVICE + "&p.c=";
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| 89 | if (this.cluster_name != null)
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| 90 | {
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| 91 | format_string += this.cluster_name;
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| 92 | }
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| 93 | format_string += "</xsl:attribute><gsf:icon/></a></td><td><gsf:metadata name='Title'/> (<xsl:value-of select='@collection'/>) </td></gsf:template></format>";
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| 94 | this.format_info_map.put(TEXT_QUERY_SERVICE, this.doc.importNode(this.converter.getDOM(format_string).getDocumentElement(), true));
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| 95 | }
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| 96 | return true;
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[11014] | 97 | }
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| 98 |
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[24979] | 99 | protected Element getServiceDescription(String service, String lang, String subset)
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| 100 | {
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| 101 | if (service.equals(TEXT_QUERY_SERVICE))
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| 102 | {
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[11014] | 103 |
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[24979] | 104 | Element ccs_service = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 105 | ccs_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_QUERY);
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| 106 | ccs_service.setAttribute(GSXML.NAME_ATT, TEXT_QUERY_SERVICE);
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| 107 |
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| 108 | // display info
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| 109 | if (subset == null || subset.equals(GSXML.DISPLAY_TEXT_ELEM + GSXML.LIST_MODIFIER))
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| 110 | {
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| 111 | ccs_service.appendChild(GSXML.createDisplayTextElement(this.doc, GSXML.DISPLAY_TEXT_NAME, getTextString(TEXT_QUERY_SERVICE + ".name", lang)));
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| 112 | ccs_service.appendChild(GSXML.createDisplayTextElement(this.doc, GSXML.DISPLAY_TEXT_SUBMIT, getTextString(TEXT_QUERY_SERVICE + ".submit", lang)));
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| 113 | ccs_service.appendChild(GSXML.createDisplayTextElement(this.doc, GSXML.DISPLAY_TEXT_DESCRIPTION, getTextString(TEXT_QUERY_SERVICE + ".description", lang)));
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| 114 | }
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| 115 | // param info
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| 116 | if (subset == null || subset.equals(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER))
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| 117 | {
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| 118 | Element param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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| 119 | // collection list
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| 120 | if (coll_ids_list == null)
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| 121 | {
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| 122 | initCollectionList();
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| 123 | }
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| 124 | Element param = GSXML.createParameterDescription(this.doc, COLLECTION_PARAM, getTextString("param." + COLLECTION_PARAM, lang), GSXML.PARAM_TYPE_ENUM_MULTI, "all", coll_ids_list, coll_names_list);
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| 125 | param_list.appendChild(param);
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| 126 | // query param
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| 127 | param = GSXML.createParameterDescription(this.doc, QUERY_PARAM, getTextString("param." + QUERY_PARAM, lang), GSXML.PARAM_TYPE_STRING, null, null, null);
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| 128 | param_list.appendChild(param);
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| 129 | ccs_service.appendChild(param_list);
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| 130 | }
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| 131 |
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| 132 | logger.debug("service description=" + this.converter.getPrettyString(ccs_service));
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| 133 | return ccs_service;
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[11014] | 134 | }
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[24979] | 135 | // these ones are probably never called, but put them here just in case
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| 136 | Element service_elem = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 137 | service_elem.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_RETRIEVE);
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| 138 | service_elem.setAttribute(GSXML.NAME_ATT, service);
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| 139 | return service_elem;
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| 140 |
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[11014] | 141 | }
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| 142 |
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[24979] | 143 | protected Element processTextQuery(Element request)
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| 144 | {
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| 145 | // Create a new (empty) result message
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| 146 | Element result = this.doc.createElement(GSXML.RESPONSE_ELEM);
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| 147 | result.setAttribute(GSXML.FROM_ATT, TEXT_QUERY_SERVICE);
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| 148 | result.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_PROCESS);
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[11014] | 149 |
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[24993] | 150 | UserContext userContext = new UserContext(request);
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| 151 |
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[24979] | 152 | // Get the parameters of the request
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| 153 | Element param_list = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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| 154 | if (param_list == null)
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| 155 | {
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| 156 | logger.error("TextQuery request had no paramList.");
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| 157 | return result; // Return the empty result
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| 158 | }
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[11014] | 159 |
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[24979] | 160 | // get the collection list
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| 161 | String[] colls_list = coll_ids_list_no_all;
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| 162 | Element coll_param = GSXML.getNamedElement(param_list, GSXML.PARAM_ELEM, GSXML.NAME_ATT, COLLECTION_PARAM);
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| 163 | if (coll_param != null)
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| 164 | {
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| 165 | String coll_list = GSXML.getValue(coll_param);
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| 166 | if (!coll_list.equals("all") && !coll_list.equals(""))
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| 167 | {
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| 168 | colls_list = coll_list.split(",");
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| 169 | }
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| 170 | }
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[11014] | 171 |
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[24979] | 172 | Element query_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
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| 173 | // we are sending the same request to each collection - build up the to
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| 174 | // attribute for the request
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| 175 | StringBuffer to_att = new StringBuffer();
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| 176 | for (int i = 0; i < colls_list.length; i++)
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| 177 | {
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| 178 | if (i > 0)
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| 179 | {
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| 180 | to_att.append(",");
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| 181 | }
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| 182 | to_att.append(GSPath.appendLink(colls_list[i], "TextQuery"));
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[11014] | 183 |
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[24979] | 184 | }
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| 185 | // send the query to all colls
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[24993] | 186 | Element query_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PROCESS, to_att.toString(), userContext);
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[24979] | 187 | query_message.appendChild(query_request);
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| 188 | // should we add params individually?
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| 189 | Element new_param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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| 190 | query_request.appendChild(new_param_list);
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| 191 | new_param_list.appendChild(this.doc.importNode(GSXML.getNamedElement(param_list, GSXML.PARAM_ELEM, GSXML.NAME_ATT, QUERY_PARAM), true));
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| 192 | Element query_result = (Element) this.router.process(query_message);
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[11014] | 193 |
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[24979] | 194 | // gather up the data from each response
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| 195 | int numDocsMatched = 0;
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| 196 | int numDocsReturned = 0;
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[11014] | 197 |
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[24979] | 198 | //term info??
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[11014] | 199 |
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[24979] | 200 | NodeList metadata = query_result.getElementsByTagName(GSXML.METADATA_ELEM);
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| 201 | for (int j = 0; j < metadata.getLength(); j++)
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| 202 | {
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| 203 | Element meta = (Element) metadata.item(j);
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| 204 | if (meta.getAttribute(GSXML.NAME_ATT).equals("numDocsReturned"))
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| 205 | {
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| 206 | numDocsReturned += Integer.parseInt(GSXML.getValue(meta));
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| 207 | }
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| 208 | else if (meta.getAttribute(GSXML.NAME_ATT).equals("numDocsMatched"))
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| 209 | {
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| 210 | numDocsMatched += Integer.parseInt(GSXML.getValue(meta));
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| 211 | }
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[11014] | 212 | }
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| 213 |
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[24979] | 214 | Element metadata_list = this.doc.createElement(GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER);
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| 215 | result.appendChild(metadata_list);
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| 216 | GSXML.addMetadata(this.doc, metadata_list, "numDocsReturned", "" + numDocsReturned);
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| 217 | //GSXML.addMetadata(this.doc, metadata_list, "numDocsMatched", ""+numDocsMatched);
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[11014] | 218 |
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[24979] | 219 | Element doc_node_list = this.doc.createElement(GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
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| 220 | result.appendChild(doc_node_list);
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[11014] | 221 |
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[24979] | 222 | NodeList responses = query_result.getElementsByTagName(GSXML.RESPONSE_ELEM);
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[13978] | 223 |
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[24979] | 224 | for (int k = 0; k < responses.getLength(); k++)
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| 225 | {
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| 226 | String coll_name = GSPath.removeLastLink(((Element) responses.item(k)).getAttribute(GSXML.FROM_ATT));
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| 227 | NodeList nodes = ((Element) responses.item(k)).getElementsByTagName(GSXML.DOC_NODE_ELEM);
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| 228 | if (nodes == null || nodes.getLength() == 0)
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| 229 | continue;
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| 230 | Element last_node = null;
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| 231 | Element this_node = null;
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| 232 | for (int n = 0; n < nodes.getLength(); n++)
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| 233 | {
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| 234 | this_node = (Element) nodes.item(n);
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| 235 | this_node.setAttribute("collection", coll_name);
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| 236 | if (k == 0)
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| 237 | {
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[13978] | 238 |
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[24979] | 239 | doc_node_list.appendChild(this.doc.importNode(this_node, true));
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| 240 | }
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| 241 | else
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| 242 | {
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| 243 | if (last_node == null)
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| 244 | {
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| 245 | last_node = (Element) GSXML.getChildByTagName(doc_node_list, GSXML.DOC_NODE_ELEM);
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| 246 | }
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| 247 | last_node = GSXML.insertIntoOrderedList(doc_node_list, GSXML.DOC_NODE_ELEM, last_node, this_node, "rank", true);
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| 248 | }
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[13978] | 249 |
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[24979] | 250 | }
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| 251 | }
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| 252 | return result;
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[11014] | 253 | }
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[13978] | 254 |
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[24979] | 255 | // protected Element processAdvTextQuery(Element request)
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| 256 | // {
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[13978] | 257 |
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[24979] | 258 | // }
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| 259 | protected boolean initCollectionList()
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| 260 | {
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[24993] | 261 | UserContext userContext = new UserContext();
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| 262 | userContext.setLanguage("en");
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| 263 | userContext.setUserID("");
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| 264 |
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[24979] | 265 | // first, get the message router info
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| 266 | Element coll_list_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
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[24993] | 267 | Element coll_list_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, "", userContext); // uid
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[24979] | 268 | coll_list_message.appendChild(coll_list_request);
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| 269 | logger.debug("coll list request = " + this.converter.getPrettyString(coll_list_request));
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| 270 | Element coll_list_response = (Element) this.router.process(coll_list_message);
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| 271 | if (coll_list_response == null)
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| 272 | {
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| 273 | logger.error("couldn't query the message router!");
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| 274 | return false;
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| 275 | }
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| 276 | logger.debug("coll list response = " + this.converter.getPrettyString(coll_list_response));
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| 277 | // second, get some info from each collection. we want the coll name
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| 278 | // and whether its got a text query service
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[13978] | 279 |
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[24979] | 280 | NodeList colls = coll_list_response.getElementsByTagName(GSXML.COLLECTION_ELEM);
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| 281 | // we will send all the requests in a single message
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| 282 | Element metadata_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
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| 283 | for (int i = 0; i < colls.getLength(); i++)
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| 284 | {
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| 285 | Element c = (Element) colls.item(i);
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| 286 | String name = c.getAttribute(GSXML.NAME_ATT);
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[24993] | 287 | Element metadata_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, name, userContext);
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[24979] | 288 | metadata_message.appendChild(metadata_request);
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| 289 | }
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| 290 | logger.debug("metadata request = " + this.converter.getPrettyString(metadata_message));
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| 291 | Element metadata_response = (Element) this.router.process(metadata_message);
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| 292 | logger.debug("metadata response = " + this.converter.getPrettyString(metadata_response));
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| 293 | NodeList coll_responses = metadata_response.getElementsByTagName(GSXML.RESPONSE_ELEM);
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| 294 | ArrayList valid_colls = new ArrayList();
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| 295 | ArrayList valid_coll_names = new ArrayList();
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| 296 | for (int i = 0; i < coll_responses.getLength(); i++)
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| 297 | {
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| 298 | Element response = (Element) coll_responses.item(i);
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| 299 | Element coll = (Element) GSXML.getChildByTagName(response, GSXML.COLLECTION_ELEM);
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| 300 | Element service_list = (Element) GSXML.getChildByTagName(coll, GSXML.SERVICE_ELEM + GSXML.LIST_MODIFIER);
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| 301 | if (service_list == null)
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| 302 | continue;
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| 303 | Element query_service = GSXML.getNamedElement(service_list, GSXML.SERVICE_ELEM, GSXML.NAME_ATT, TEXT_QUERY_SERVICE); // should be AbstractTextSearch.TEXT_QUERY_SERVICE
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| 304 | if (query_service == null)
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| 305 | continue;
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| 306 | // use the name of the response in case we are talking to a remote collection, not the name of the collection.
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| 307 | String coll_id = response.getAttribute(GSXML.FROM_ATT);
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| 308 | String coll_name = coll_id + ": " + GSXML.getDisplayText(coll, GSXML.DISPLAY_TEXT_NAME, "en", "en"); // just use english for now until we do some caching or something
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| 309 | valid_colls.add(coll_id);
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| 310 | valid_coll_names.add(coll_name);
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| 311 | }
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| 312 |
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| 313 | if (valid_colls.size() == 0)
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| 314 | {
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| 315 | return false;
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| 316 | }
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| 317 | // ids no all has the list without 'all' option.
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| 318 | this.coll_ids_list_no_all = new String[1];
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| 319 | this.coll_ids_list_no_all = (String[]) valid_colls.toArray(coll_ids_list_no_all);
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| 320 |
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| 321 | valid_colls.add(0, "all");
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| 322 | valid_coll_names.add(0, getTextString("param." + COLLECTION_PARAM + ".all", "en"));
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| 323 | this.coll_ids_list = new String[1];
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| 324 | this.coll_names_list = new String[1];
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| 325 | this.coll_ids_list = (String[]) valid_colls.toArray(coll_ids_list);
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| 326 | this.coll_names_list = (String[]) valid_coll_names.toArray(coll_names_list);
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| 327 | return true;
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[11014] | 328 | }
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| 329 |
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[24979] | 330 | protected Element processDocumentMetadataRetrieve(Element request)
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| 331 | {
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| 332 | // Create a new (empty) result message
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| 333 | Element result = this.doc.createElement(GSXML.RESPONSE_ELEM);
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| 334 | result.setAttribute(GSXML.FROM_ATT, DOCUMENT_METADATA_RETRIEVE_SERVICE);
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| 335 | result.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_PROCESS);
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| 336 |
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[24993] | 337 | UserContext userContext = new UserContext(request);
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[24979] | 338 | // Get the parameters of the request
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| 339 | Element param_list = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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| 340 | if (param_list == null)
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| 341 | {
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| 342 | logger.error("DocumentMetadataRetrieve request had no paramList.");
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| 343 | return result; // Return the empty result
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| 344 | }
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| 345 |
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| 346 | NodeList query_doc_list = request.getElementsByTagName(GSXML.DOC_NODE_ELEM);
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| 347 | if (query_doc_list.getLength() == 0)
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| 348 | {
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| 349 | logger.error("DocumentMetadataRetrieve request had no documentNodes.");
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| 350 | return result; // Return the empty result
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| 351 | }
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| 352 |
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| 353 | // the resulting doc node list
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| 354 | Element result_node_list = this.doc.createElement(GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
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| 355 | result.appendChild(result_node_list);
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| 356 |
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| 357 | // get all the metadata params
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| 358 | Element new_param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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| 359 | Element param = GSXML.createParameter(this.doc, "metadata", "Title");
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| 360 | new_param_list.appendChild(param);
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| 361 |
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| 362 | // organise the nodes into collection lists
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| 363 | HashMap coll_map = new HashMap();
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| 364 |
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| 365 | for (int i = 0; i < query_doc_list.getLength(); i++)
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| 366 | {
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| 367 | Element doc_node = (Element) query_doc_list.item(i);
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| 368 | String coll_name = doc_node.getAttribute("collection");
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| 369 | Element coll_items = (Element) coll_map.get(coll_name);
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| 370 | if (coll_items == null)
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| 371 | {
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| 372 | coll_items = this.doc.createElement(GSXML.DOC_NODE_ELEM + GSXML.LIST_MODIFIER);
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| 373 | coll_map.put(coll_name, coll_items);
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| 374 | }
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| 375 | coll_items.appendChild(this.doc.importNode(doc_node, true));
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| 376 | }
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| 377 |
|
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| 378 | // create teh individual requests
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| 379 | Element meta_request_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
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| 380 | Set mapping_set = coll_map.entrySet();
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| 381 | Iterator iter = mapping_set.iterator();
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| 382 |
|
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| 383 | while (iter.hasNext())
|
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| 384 | {
|
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| 385 | Map.Entry e = (Map.Entry) iter.next();
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| 386 | String cname = (String) e.getKey();
|
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| 387 | Element doc_nodes = (Element) e.getValue();
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[24993] | 388 | Element meta_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PROCESS, GSPath.appendLink(cname, DOCUMENT_METADATA_RETRIEVE_SERVICE), userContext);
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[24979] | 389 | meta_request.appendChild(doc_nodes);
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| 390 | meta_request.appendChild(new_param_list.cloneNode(true));
|
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| 391 | meta_request_message.appendChild(meta_request);
|
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| 392 |
|
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| 393 | }
|
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| 394 |
|
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| 395 | Node meta_result_node = this.router.process(meta_request_message);
|
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| 396 | Element meta_result = this.converter.nodeToElement(meta_result_node);
|
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| 397 |
|
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| 398 | // now need to put the doc nodes back in the right order
|
---|
| 399 | // go through the original list again. keep an element pointer to
|
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| 400 | // the next element in each collections list
|
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| 401 | NodeList meta_responses = meta_result.getElementsByTagName(GSXML.RESPONSE_ELEM);
|
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| 402 | for (int i = 0; i < meta_responses.getLength(); i++)
|
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| 403 | {
|
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| 404 | String collname = GSPath.removeLastLink(((Element) meta_responses.item(i)).getAttribute(GSXML.FROM_ATT));
|
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| 405 | Element first_elem = (Element) GSXML.getNodeByPath(meta_responses.item(i), "documentNodeList/documentNode");
|
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| 406 | coll_map.put(collname, first_elem);
|
---|
| 407 | }
|
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| 408 |
|
---|
| 409 | for (int i = 0; i < query_doc_list.getLength(); i++)
|
---|
| 410 | {
|
---|
| 411 | Element doc_node = (Element) query_doc_list.item(i);
|
---|
| 412 | Element new_node = (Element) this.doc.importNode(doc_node, false);
|
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| 413 | result_node_list.appendChild(new_node);
|
---|
| 414 | String coll_name = doc_node.getAttribute("collection");
|
---|
| 415 |
|
---|
| 416 | Element meta_elem = (Element) coll_map.get(coll_name);
|
---|
| 417 | GSXML.mergeMetadataLists(new_node, meta_elem);
|
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| 418 | coll_map.put(coll_name, meta_elem.getNextSibling());
|
---|
| 419 | }
|
---|
| 420 | return result;
|
---|
[11014] | 421 | }
|
---|
| 422 | }
|
---|