1 | /*
|
---|
2 | * GS2Browse.java
|
---|
3 | * Copyright (C) 2002 New Zealand Digital Library, http://www.nzdl.org
|
---|
4 | *
|
---|
5 | * This program is free software; you can redistribute it and/or modify
|
---|
6 | * it under the terms of the GNU General Public License as published by
|
---|
7 | * the Free Software Foundation; either version 2 of the License, or
|
---|
8 | * (at your option) any later version.
|
---|
9 | *
|
---|
10 | * This program is distributed in the hope that it will be useful,
|
---|
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
13 | * GNU General Public License for more details.
|
---|
14 | *
|
---|
15 | * You should have received a copy of the GNU General Public License
|
---|
16 | * along with this program; if not, write to the Free Software
|
---|
17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
---|
18 | */
|
---|
19 | package org.greenstone.gsdl3.service;
|
---|
20 |
|
---|
21 | import org.greenstone.gdbm.*;
|
---|
22 | import org.greenstone.gsdl3.util.*;
|
---|
23 |
|
---|
24 | import org.w3c.dom.Document;
|
---|
25 | import org.w3c.dom.Node;
|
---|
26 | import org.w3c.dom.Text;
|
---|
27 | import org.w3c.dom.Element;
|
---|
28 | import org.w3c.dom.NodeList;
|
---|
29 | /**
|
---|
30 | * A ServicesImpl class for GSDL2-style Classifiers
|
---|
31 | *
|
---|
32 | * @author <a href="mailto:[email protected]">Katherine Don</a>
|
---|
33 | * @version $Revision: 3649 $
|
---|
34 | */
|
---|
35 | public class GS2Browse
|
---|
36 | extends ServiceRack {
|
---|
37 |
|
---|
38 | // the services on offer
|
---|
39 | private static final String CLASSIFIER_SERVICE = "ClassifierBrowse";
|
---|
40 |
|
---|
41 | /** gdbm wrapper */
|
---|
42 | private GDBMWrapper gdbm_src_=null;
|
---|
43 |
|
---|
44 | public GS2Browse() {
|
---|
45 | gdbm_src_ = new GDBMWrapper();
|
---|
46 |
|
---|
47 | }
|
---|
48 |
|
---|
49 | /** creates a display element containing all the text strings needed to display the service page, in the language specified */
|
---|
50 | protected Element createServiceDisplay(String service, String lang) {
|
---|
51 | Element display = doc_.createElement(GSXML.DISPLAY_ELEM);
|
---|
52 | display.appendChild(GSXML.createTextElement(doc_, GSXML.DISPLAY_NAME_ELEM, getTextString(service+".name", lang)));
|
---|
53 | display.appendChild(GSXML.createTextElement(doc_, GSXML.DISPLAY_SUBMIT_ELEM, getTextString(service+".submit", lang)));
|
---|
54 |
|
---|
55 | Element param;
|
---|
56 |
|
---|
57 | return display;
|
---|
58 |
|
---|
59 | }
|
---|
60 |
|
---|
61 | /** processes the request */
|
---|
62 | protected Element processClassifierBrowse(Element request) {
|
---|
63 |
|
---|
64 | // the response element
|
---|
65 | Element result = doc_.createElement(GSXML.RESPONSE_ELEM);
|
---|
66 | String from = GSPath.appendLink(cluster_name_, CLASSIFIER_SERVICE);
|
---|
67 | result.setAttribute(GSXML.FROM_ATT, from);
|
---|
68 | result.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_QUERY);
|
---|
69 | Element result_content = doc_.createElement(GSXML.CONTENT_ELEM);
|
---|
70 | result.appendChild(result_content);
|
---|
71 |
|
---|
72 | // get the classifier name out of request content - assume only one for now
|
---|
73 | String path = GSXML.CONTENT_ELEM;
|
---|
74 | path = GSPath.appendLink(path, GSXML.DOCUMENT_ELEM+GSXML.LIST_MODIFIER);
|
---|
75 | path = GSPath.appendLink(path, GSXML.DOCUMENT_ELEM);
|
---|
76 |
|
---|
77 | Element elem = (Element)GSXML.getNodeByPath(request, path);
|
---|
78 | String elem_name = elem.getAttribute(GSXML.NAME_ATT);
|
---|
79 |
|
---|
80 | if (OID.needsTranslating(elem_name)) {
|
---|
81 | elem_name = gdbm_src_.translateOID(elem_name);
|
---|
82 | }
|
---|
83 | // get the info from gdbm db
|
---|
84 | DBInfo info = gdbm_src_.getInfo(elem_name);
|
---|
85 |
|
---|
86 | // build up the XML
|
---|
87 | Element classifier = doc_.createElement(GSXML.CLASSIFIER_ELEM);
|
---|
88 |
|
---|
89 | String classifier_name = OID.getTop(elem_name);
|
---|
90 | classifier.setAttribute(GSXML.NAME_ATT, classifier_name);
|
---|
91 | result_content.appendChild(classifier);
|
---|
92 | DBInfo top_info;
|
---|
93 |
|
---|
94 | if (elem_name.equals(classifier_name)) {
|
---|
95 | top_info = info;
|
---|
96 | } else {
|
---|
97 | top_info = gdbm_src_.getInfo(classifier_name);
|
---|
98 | }
|
---|
99 |
|
---|
100 | // a substitute template - should be read from config file
|
---|
101 | //String extra = "<stylesheet xmlns:xsl='http://www.w3.org/1999/XSL/Transform'><xsl:template match='document' priority='3'><xsl:param name='collName'>coll-name</xsl:param><xsl:variable name='library' select='ancestor::page/config/library_name'/><td><a href='{$library}?a=r&c={$collName}&r={@name}'><img src='interfaces/default/images/book.gif' width='18' height='11' border='0'/></a></td><td>***</td><td><xsl:value-of select='metadataList/metadata[@name=\"Title\"]'/></td></xsl:template></stylesheet>";
|
---|
102 | //Element extra_doc = converter_.getDOM(extra).getDocumentElement();
|
---|
103 | //result.appendChild(doc_.importNode(extra_doc, true));
|
---|
104 |
|
---|
105 | // get the classifier attributes
|
---|
106 | String type = top_info.getInfo("childtype");
|
---|
107 | if (type.equals("VList")) {
|
---|
108 |
|
---|
109 | classifier.setAttribute("type", "vertical");
|
---|
110 | classifier.setAttribute("interleave", "true");
|
---|
111 | classifier.setAttribute("link", "icon");
|
---|
112 | }
|
---|
113 | else if (type.equals("HList")){
|
---|
114 | classifier.setAttribute("type", "horizontal");
|
---|
115 | classifier.setAttribute("interleave", "false");
|
---|
116 | classifier.setAttribute("link", "name");
|
---|
117 | } else {
|
---|
118 | System.out.println("unknown type!!! check this");
|
---|
119 | classifier.setAttribute("type", "vertical");
|
---|
120 | classifier.setAttribute("interleave", "true");
|
---|
121 | classifier.setAttribute("link", "icon");
|
---|
122 | }
|
---|
123 |
|
---|
124 | Element this_node;
|
---|
125 | if (elem_name.equals(classifier_name)) {
|
---|
126 | this_node = classifier;
|
---|
127 | } else { // have to build up the parents
|
---|
128 | // the current node
|
---|
129 | this_node = doc_.createElement("node");
|
---|
130 | this_node.setAttribute("name", elem_name);
|
---|
131 | type = info.getInfo("childtype");
|
---|
132 | if (type.equals("VList")) {
|
---|
133 | this_node.setAttribute("type", "vertical");
|
---|
134 | } else {
|
---|
135 | this_node.setAttribute("type", "horzizontal");
|
---|
136 | }
|
---|
137 | String title = info.getInfo("Title");
|
---|
138 | Element meta_list = doc_.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
|
---|
139 | GSXML.addMetadata(doc_, meta_list, "Title", title);
|
---|
140 | this_node.appendChild(meta_list);
|
---|
141 |
|
---|
142 | // the parents
|
---|
143 | String middle_name = OID.getParent(elem_name);
|
---|
144 | Element middle_node = this_node;
|
---|
145 | while (!middle_name.equals(classifier_name)) {
|
---|
146 | // add in a new node
|
---|
147 | Element temp_node = doc_.createElement("node");
|
---|
148 | temp_node.setAttribute("name", middle_name);
|
---|
149 |
|
---|
150 | DBInfo i = gdbm_src_.getInfo(middle_name);
|
---|
151 | type = i.getInfo("childtype");
|
---|
152 | if (type.equals("VList")) {
|
---|
153 | temp_node.setAttribute("type", "vertical");
|
---|
154 | } else {
|
---|
155 | temp_node.setAttribute("type", "horzizontal");
|
---|
156 | }
|
---|
157 | title = i.getInfo("Title");
|
---|
158 | meta_list = doc_.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
|
---|
159 | GSXML.addMetadata(doc_, meta_list, "Title", title);
|
---|
160 | temp_node.appendChild(meta_list);
|
---|
161 |
|
---|
162 | // link into the tree
|
---|
163 | temp_node.appendChild(middle_node);
|
---|
164 | middle_node = temp_node;
|
---|
165 | middle_name = OID.getParent(middle_name);
|
---|
166 | }
|
---|
167 | classifier.appendChild(middle_node);
|
---|
168 | }
|
---|
169 | // get the child nodes
|
---|
170 | String contains = info.getInfo("contains");
|
---|
171 | // replace the " with parent name
|
---|
172 | contains = OID.translateParent(contains, elem_name);
|
---|
173 | String [] children = contains.split(";");
|
---|
174 | for (int i=0; i<children.length; i++) {
|
---|
175 | String child = children[i];
|
---|
176 | DBInfo child_info = gdbm_src_.getInfo(child);
|
---|
177 | String title = child_info.getInfo("Title");
|
---|
178 | Element node;
|
---|
179 | // should have a type here, not rely on HASH ids
|
---|
180 | if (child.startsWith("HASH")) {
|
---|
181 | // a document
|
---|
182 | node = doc_.createElement(GSXML.DOCUMENT_ELEM);
|
---|
183 | } else { // a node in the classification
|
---|
184 | node = doc_.createElement("node");
|
---|
185 |
|
---|
186 | }
|
---|
187 |
|
---|
188 | node.setAttribute(GSXML.NAME_ATT, child);
|
---|
189 | Element meta_list = doc_.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
|
---|
190 | GSXML.addMetadata(doc_, meta_list, "Title", title);
|
---|
191 | node.appendChild(meta_list);
|
---|
192 | this_node.appendChild(node);
|
---|
193 |
|
---|
194 | }
|
---|
195 |
|
---|
196 | return result;
|
---|
197 |
|
---|
198 | }
|
---|
199 |
|
---|
200 |
|
---|
201 | /** configure this service */
|
---|
202 | public boolean configure(Element info) {
|
---|
203 |
|
---|
204 | System.out.println("configuring GS2Browse");
|
---|
205 |
|
---|
206 | Element e = null;
|
---|
207 | // these entries should reflect the build config file - some services may not be available depending on how the colleciton was built.
|
---|
208 | // set up short_service_info_ - for now just has name and type
|
---|
209 | e = doc_.createElement(GSXML.SERVICE_ELEM);
|
---|
210 | e.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_QUERY);
|
---|
211 | e.setAttribute(GSXML.NAME_ATT, CLASSIFIER_SERVICE);
|
---|
212 | short_service_info_.appendChild(e);
|
---|
213 |
|
---|
214 | // set up service_info_map_ - for now, just has the same elements as above
|
---|
215 | // should have full details about each service incl params lists etc.
|
---|
216 | e = doc_.createElement(GSXML.SERVICE_ELEM);
|
---|
217 | e.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_QUERY);
|
---|
218 | e.setAttribute(GSXML.NAME_ATT, CLASSIFIER_SERVICE);
|
---|
219 |
|
---|
220 | // get the classifier list out of the service info
|
---|
221 | Node classList = GSXML.getChildByTagName(info, GSXML.CLASSIFIER_ELEM+GSXML.LIST_MODIFIER);
|
---|
222 | e.appendChild(doc_.importNode(classList, true));
|
---|
223 |
|
---|
224 | service_info_map_.put(CLASSIFIER_SERVICE, e);
|
---|
225 |
|
---|
226 | if (gdbm_src_.openDatabase(GSFile.GDBMDatabaseFile(site_home_, cluster_name_), GDBMWrapper.READER)) {
|
---|
227 | return true;
|
---|
228 | }
|
---|
229 | else {
|
---|
230 | System.err.println("couldn't open gdbm database!");
|
---|
231 | return false;
|
---|
232 | }
|
---|
233 |
|
---|
234 | }
|
---|
235 |
|
---|
236 |
|
---|
237 | }
|
---|
238 |
|
---|
239 |
|
---|