[9886] | 1 | package org.greenstone.gsdl3.service;
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| 2 |
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| 3 | // Greenstone classes
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| 4 | import org.greenstone.gsdl3.util.*;
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| 5 |
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| 6 | //Fedora Web Services classes
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| 7 | import fedora.client.utility.AutoFinder;
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| 8 | import fedora.client.APIAStubFactory;
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| 9 | import fedora.client.Downloader;
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| 10 | import fedora.server.access.FedoraAPIA;
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| 11 | import fedora.server.types.gen.FieldSearchQuery;
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| 12 | import fedora.server.types.gen.FieldSearchResult;
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| 13 | import fedora.server.types.gen.ListSession;
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| 14 | import fedora.server.types.gen.ObjectFields;
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| 15 | import fedora.server.types.gen.Condition;
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| 16 | import fedora.server.types.gen.ComparisonOperator;
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| 17 |
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| 18 | import javax.xml.transform.stream.StreamResult;
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| 19 | import javax.xml.transform.stream.StreamSource;
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| 20 | import javax.xml.transform.Templates;
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| 21 | import javax.xml.transform.Transformer;
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| 22 | import javax.xml.transform.TransformerFactory;
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| 23 |
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| 24 | // XML classes
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| 25 | import org.w3c.dom.Element;
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| 26 | import org.w3c.dom.Document;
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| 27 | import org.w3c.dom.NodeList;
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| 28 |
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| 29 | //Java classes
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| 30 | import java.util.ArrayList;
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| 31 | import java.util.HashMap;
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| 32 | import java.util.List;
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| 33 | import java.util.Properties;
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| 34 | import java.io.File;
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| 35 | import java.io.InputStream;
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| 36 | import java.io.BufferedReader;
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| 37 | import java.io.InputStreamReader;
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| 38 | import java.io.IOException;
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| 39 | import java.net.HttpURLConnection;
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| 40 | import java.net.URLConnection;
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| 41 | import java.net.URL;
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| 42 | import java.net.Authenticator;
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| 43 | import java.net.MalformedURLException;
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| 44 | import java.lang.Object;
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| 45 |
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[20294] | 46 | import org.apache.log4j.*;
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[9886] | 47 |
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| 48 | /**
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| 49 | *
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| 50 | *
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| 51 | */
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| 52 |
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| 53 | public class FedoraSearch
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| 54 | extends AbstractSearch {
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| 55 |
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[20294] | 56 | static Logger logger = Logger.getLogger(org.greenstone.gsdl3.service.FedoraSearch.class.getName());
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[9886] | 57 | // the services on offer
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| 58 | // these strings must match what is found in the properties file
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| 59 | protected static final String FIELD_PARAM = "fields";
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| 60 |
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| 61 | //Parameters connect to Proxy Server
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| 62 | private String proxyUser = null;
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| 63 | private String proxyPassword = null;
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| 64 |
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| 65 | private int maxResult, matchNum;
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| 66 |
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| 67 | protected String fedora_server_url = null;
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| 68 |
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| 69 | public FedoraSearch()
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| 70 | {
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[28969] | 71 | QUERY_SERVICE = "TextQuery";
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[9886] | 72 | }
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| 73 |
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| 74 | //Configure FedoraSearch Service
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| 75 | public boolean configure(Element info, Element extra_info)
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| 76 | {
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| 77 | Element server_elem = (Element)GSXML.getChildByTagName(info, "fedoraServer");
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| 78 | if (server_elem == null) {
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[20294] | 79 | logger.error("no fedoraServer element found");
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[9886] | 80 | return false;
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| 81 | }
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| 82 | fedora_server_url = server_elem.getAttribute("url");
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[20294] | 83 | logger.info("Fedora Server:" + fedora_server_url);
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[9886] | 84 |
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| 85 | if (fedora_server_url.equals("")) {
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[20294] | 86 | logger.error("no url for the fedoraServer element");
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[9886] | 87 | return false;
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| 88 | }
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[28969] | 89 | Element tq_service = this.desc_doc.createElement(GSXML.SERVICE_ELEM);
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[9886] | 90 | tq_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_QUERY);
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[28969] | 91 | tq_service.setAttribute(GSXML.NAME_ATT, QUERY_SERVICE);
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[9886] | 92 | this.short_service_info.appendChild(tq_service);
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| 93 | //does_paging = true;
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| 94 |
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| 95 | // add some format info to service map if there is any
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| 96 | String path = GSPath.appendLink(GSXML.SEARCH_ELEM, GSXML.FORMAT_ELEM);
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| 97 | Element format = (Element) GSXML.getNodeByPath(extra_info, path);
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| 98 | if (format != null) {
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[28969] | 99 | this.format_info_map.put(QUERY_SERVICE, this.desc_doc.importNode(format, true));
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[9886] | 100 | }
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| 101 | return true;
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| 102 | }
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| 103 |
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| 104 | /** Process a text query - implemented by concrete subclasses */
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| 105 | protected Element processTextQuery(Element request) {
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| 106 | // Create a new (empty) result message
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[28969] | 107 | Document result_doc = XMLConverter.newDOM();
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| 108 | Element result = result_doc.createElement(GSXML.RESPONSE_ELEM);
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| 109 | result.setAttribute(GSXML.FROM_ATT, QUERY_SERVICE);
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[9886] | 110 | result.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_PROCESS);
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| 111 |
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[28969] | 112 | Element doc_node_list = result_doc.createElement(GSXML.DOC_NODE_ELEM+GSXML.LIST_MODIFIER);
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[9886] | 113 | result.appendChild(doc_node_list);
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| 114 |
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| 115 | Element param_list = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
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| 116 | if (param_list == null) {
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[20294] | 117 | logger.error("TextQuery request had no paramList.");
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[9886] | 118 | return result; // Return the empty result
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| 119 | }
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| 120 |
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| 121 | // Process the request parameters
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| 122 | HashMap params = GSXML.extractParams(param_list, false);
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| 123 |
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| 124 | // Make sure a query has been specified
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| 125 | String query = (String) params.get(QUERY_PARAM);
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| 126 | if (query == null || query.equals("")) {
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| 127 | return result; // Return the empty result
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| 128 | }
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| 129 | //Check Max number of Documents hit
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| 130 | String maxDocs = (String) params.get(MAXDOCS_PARAM);
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| 131 | String hits_per_page = (String) params.get(HITS_PER_PAGE_PARAM);
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| 132 |
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| 133 | //Check the start_page number
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| 134 | String start_page = (String) params.get(START_PAGE_PARAM);
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| 135 |
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| 136 | // tidy whitespace
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| 137 | //query = query.replaceAll("\\s+", "+");
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| 138 | matchNum = 0;
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| 139 | maxResult = 20;
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| 140 |
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| 141 | try {
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| 142 | //Search Fedora Server
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| 143 | String host = "toetoe";
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| 144 | int port = 8200;
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| 145 | String user = "fedoraAdmin";
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| 146 | String pass = "fedoraAdmin";
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| 147 |
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| 148 | AutoFinder finder=new AutoFinder(host, port, user, pass);
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| 149 |
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| 150 | String[] fieldsArray = new String[] {"pid", "label", "fType", "bDef",
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| 151 | "bMech", "cModel", "state", "ownerId", "cDate", "mDate",
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| 152 | "dcmDate", "title", "creator", "subject", "description",
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| 153 | "publisher", "contributor", "date", "type", "format",
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| 154 | "identifier", "source", "language", "relation", "coverage",
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| 155 | "rights"};
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| 156 |
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| 157 | String match_fields = join(fieldsArray, "|");
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| 158 |
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| 159 | FieldSearchQuery query_fedora=fedoraSearch(query, match_fields);
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| 160 |
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| 161 | FieldSearchResult result_fedora = finder.findObjects(fieldsArray, maxResult, query_fedora);
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| 162 |
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| 163 | while (result_fedora != null) {
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[20294] | 164 | logger.info("Search Result:" + result_fedora.getResultList().length);
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[9886] | 165 | for (int i=0; i<result_fedora.getResultList().length; i++) {
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| 166 | ObjectFields o = result_fedora.getResultList()[i];
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| 167 | matchNum++;
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| 168 | String pid = o.getPid();
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| 169 | String fedora_url = fedora_server_url +"/fedora/get/" + pid;
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| 170 | String label = o.getLabel();
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| 171 | String[] creator = o.getCreator();
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| 172 | String[] subject = o.getSubject();
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| 173 | String[] publisher = o.getPublisher();
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| 174 | String[] contributor = o.getContributor();
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| 175 | String[] title = o.getTitle();
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| 176 | String[] description = o.getDescription();
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| 177 | String[] format = o.getFormat();
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| 178 | String[] identifier = o.getIdentifier();
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| 179 | String[] source = o.getSource();
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| 180 | String[] language = o.getLanguage();
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| 181 |
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[28969] | 182 | Element doc_node = result_doc.createElement(GSXML.DOC_NODE_ELEM);
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[9886] | 183 | doc_node_list.appendChild(doc_node);
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| 184 |
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[28969] | 185 | Element metadata_list = result_doc.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
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[9886] | 186 | doc_node.appendChild(metadata_list);
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| 187 |
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| 188 | if (fedora_url != null) {
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[28966] | 189 | GSXML.addMetadata( metadata_list, "URL", fedora_url);
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[9886] | 190 | }
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| 191 | if (o.getDescription() != null) {
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[28966] | 192 | GSXML.addMetadata(metadata_list, "Description", description[0]);
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[9886] | 193 | }
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| 194 | if (title[0] != null) {
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[28966] | 195 | GSXML.addMetadata(metadata_list, "Title", title[0]);
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[9886] | 196 | }
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| 197 | }
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| 198 | ListSession sess=result_fedora.getListSession();
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| 199 | if (sess!=null) {
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| 200 | result_fedora = finder.resumeFindObjects(sess.getToken());
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| 201 | } else {
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| 202 | result_fedora = null;
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| 203 | }
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| 204 | }
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| 205 | } catch (Exception e) {
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[20294] | 206 | logger.error("ERROR: " + e.getClass().getName()
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[9886] | 207 | + ((e.getMessage()==null) ? "" : ": " + e.getMessage()));
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| 208 | }
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| 209 |
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[28969] | 210 | Element metadata_list = result_doc.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
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[9886] | 211 | result.appendChild(metadata_list);
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| 212 |
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| 213 | // Add a metadata element specifying the number of matching documents
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[20294] | 214 | //logger.info("FedoraSearch Number of Documents:" + matchNum);
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[28966] | 215 | GSXML.addMetadata(metadata_list, "numDocsMatched", ""+matchNum);
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[9886] | 216 |
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| 217 | return result;
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| 218 | }
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| 219 |
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| 220 | protected FieldSearchQuery fedoraSearch(String query_terms, String matchFields) {
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| 221 |
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| 222 | FieldSearchQuery fedora_query=new FieldSearchQuery();
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| 223 | try {
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| 224 | // check if query contains any fields name (pid, label, fType....)
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| 225 | if (query_terms.matches("^("+ matchFields+").+")){
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[20294] | 226 | logger.info("Implementing Specific Query....");
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[9886] | 227 |
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| 228 | List conditions=fedora.server.search.Condition.getConditions(query_terms);
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| 229 |
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| 230 | Condition[] cond=new Condition[conditions.size()];
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| 231 | for (int i=0; i<conditions.size(); i++) {
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| 232 | fedora.server.search.Condition c = (fedora.server.search.Condition) conditions.get(i);
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| 233 | try {
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| 234 | String operator = transOperator(c.getOperator().getAbbreviation());
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| 235 | cond[i] = new Condition();
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| 236 | cond[i].setProperty(c.getProperty());
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| 237 | cond[i].setOperator(ComparisonOperator.fromValue(operator));
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| 238 | cond[i].setValue(c.getValue());
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| 239 | } catch (Exception e){
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| 240 | e.printStackTrace();
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| 241 | }
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| 242 | }
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| 243 | fedora_query.setConditions(cond);
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| 244 | } else {
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[20294] | 245 | logger.info("Implementing Simple Query...");
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[9886] | 246 | fedora_query.setTerms(query_terms);
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| 247 | }
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| 248 | } catch (Exception e){
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| 249 | e.printStackTrace();
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| 250 | }
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| 251 | return fedora_query;
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| 252 | }
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| 253 |
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| 254 | protected void getIndexData(ArrayList index_ids, ArrayList index_names,String lang){
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| 255 | index_ids.add("kw");
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| 256 | index_ids.add("au");
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| 257 | index_ids.add("su");
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| 258 | index_ids.add("ti");
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| 259 | index_ids.add("de");
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| 260 | index_ids.add("fu");
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| 261 | index_names.add(getTextString("param."+FIELD_PARAM+".kw", lang));
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| 262 | index_names.add(getTextString("param."+FIELD_PARAM+".au", lang));
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| 263 | index_names.add(getTextString("param."+FIELD_PARAM+".su", lang));
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| 264 | index_names.add(getTextString("param."+FIELD_PARAM+".ti", lang));
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| 265 | index_names.add(getTextString("param."+FIELD_PARAM+".de", lang));
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| 266 | index_names.add(getTextString("param."+FIELD_PARAM+".fu", lang));
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| 267 | }
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| 268 |
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| 269 | protected String getDocType (String node_id){
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| 270 | return node_id;
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| 271 | }
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| 272 | protected boolean hasChildren(String node_id){
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| 273 | return false;
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| 274 | }
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| 275 |
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| 276 | protected boolean hasParent(String node_id){
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| 277 | return false;
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| 278 | }
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| 279 | private String transOperator(String operator){
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| 280 | String oper_char ="";
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| 281 | if (operator == "~") {
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| 282 | oper_char = "has";
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| 283 | } else if (operator == "=") {
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| 284 | oper_char = "eq";
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| 285 | } else if (operator == ">"){
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| 286 | oper_char = "gt";
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| 287 | } else if (operator == ">="){
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| 288 | oper_char = "ge";
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| 289 | } else if (operator == "<"){
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| 290 | oper_char = "lt";
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| 291 | } else if (operator == "<="){
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| 292 | oper_char = "le";
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| 293 | }
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| 294 | return oper_char;
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| 295 | }
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| 296 | protected String join( String[] array, String delim ) {
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| 297 | String j = "";
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| 298 | for ( int i=0; i<array.length; i++ ) {
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| 299 | if (i!=0) j += delim;
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| 300 | j += array[i];
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| 301 | }
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| 302 | return j;
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| 303 | }
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| 304 | }
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