source: main/trunk/greenstone3/src/java/org/greenstone/gsdl3/action/SystemAction.java@ 23340

Last change on this file since 23340 was 23340, checked in by sjb48, 13 years ago

I now have a button on the page that sends the format string back to the server via a new SystemAction subaction. The format string is parsed and a DOM tree generated. The system xslt will then transform the DOM tree into XML. It currently transforms templates and combo-based metadata.
  • Property svn:keywords set to Author Date Id Revision
File size: 7.2 KB
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1package org.greenstone.gsdl3.action;
2
3import org.greenstone.gsdl3.core.ModuleInterface;
4import org.greenstone.gsdl3.util.*;
5
6// XML classes
7import org.w3c.dom.Node;
8import org.w3c.dom.Element;
9import org.w3c.dom.Document;
10
11// other java stuff
12import java.io.File;
13import java.util.HashMap;
14import java.util.*;
15import java.io.StringReader;
16import org.xml.sax.InputSource;
17import javax.xml.parsers.DocumentBuilder;
18import javax.xml.parsers.DocumentBuilderFactory;
19
20import java.io.*;
21import org.xml.sax.*;
22import javax.xml.parsers.SAXParserFactory;
23import javax.xml.parsers.ParserConfigurationException;
24import javax.xml.parsers.SAXParser;
25
26import java.io.PrintWriter;
27import java.io.StringWriter;
28
29import org.apache.log4j.*;
30
31public class SystemAction extends Action {
32
33 static Logger logger = Logger.getLogger(org.greenstone.gsdl3.action.SystemAction.class.getName());
34
35 String tempVal = "";
36
37 /** process a request */
38 public Node process (Node message_node) {
39
40 Element message = this.converter.nodeToElement(message_node);
41
42 // assume only one request
43 Element request = (Element)GSXML.getChildByTagName(message, GSXML.REQUEST_ELEM);
44
45 String subaction = request.getAttribute(GSXML.SUBACTION_ATT);
46 String lang = request.getAttribute(GSXML.LANG_ATT);
47 String uid = request.getAttribute(GSXML.USER_ID_ATT);
48 // get the param list
49 Element cgi_param_list = (Element)GSXML.getChildByTagName(request, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
50 HashMap params = GSXML.extractParams(cgi_param_list, false);
51
52 Element result = this.doc.createElement(GSXML.MESSAGE_ELEM);
53
54 String coll = (String)params.get(GSParams.SYSTEM_CLUSTER);
55
56 String to = "";
57 if (coll!=null && !coll.equals("")) {
58 to = coll;
59 }
60
61 Element mr_request_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
62 Element mr_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_SYSTEM, to, lang, uid);
63 mr_request_message.appendChild(mr_request);
64
65 Element system = this.doc.createElement(GSXML.SYSTEM_ELEM);
66 mr_request.appendChild(system);
67
68 // will need to change the following if can do more than one system request at once
69 if (subaction.equals("c")) { // configure
70 system.setAttribute(GSXML.TYPE_ATT, GSXML.SYSTEM_TYPE_CONFIGURE);
71 String info = (String)params.get(GSParams.SYSTEM_SUBSET);
72 system.setAttribute(GSXML.SYSTEM_SUBSET_ATT, info);
73 }
74 else if(subaction.equals("s")) { // save format statement
75 logger.error("Initiate save");
76 String format_string = (String)params.get("data");
77 logger.error("data="+format_string);
78
79 //SamParser sam = new SamParser();
80 //String format_statement = sam.parse(input);
81 //logger.error("format string="+format_statement);
82
83 Element page_response = this.doc.createElement(GSXML.RESPONSE_ELEM);
84
85 Iterator it = params.keySet().iterator();
86 while(it.hasNext())
87 {
88 logger.error("Param: "+it.next());
89 }
90
91 //Node text = this.doc.createTextNode(format_string);
92 //page_response.appendChild(text);
93
94
95 try {
96 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
97 DocumentBuilder builder = factory.newDocumentBuilder();
98 //String input = "<html><head><title></title></head><body>" + format_string + "</body></html>";
99 String input = format_string;
100 InputSource is = new InputSource( new StringReader( input ) );
101 Document d = builder.parse( is );
102 Element e = d.getDocumentElement();
103
104 page_response.appendChild(this.doc.importNode(e, true));
105 }
106 catch( Exception ex ) {
107 logger.error("There was an exception "+ex);
108
109 StringWriter sw = new StringWriter();
110 PrintWriter pw = new PrintWriter(sw, true);
111 ex.printStackTrace(pw);
112 pw.flush();
113 sw.flush();
114 logger.error(sw.toString());
115 }
116
117
118 //Element child = this.doc.createElement("div"); //format_string);
119 //Node text = this.doc.createTextNode(format_string); //"<h1>Hi there and greetings!</h1>");
120 //child.innerHTML = "<h1>Hi there and greetings!</h1>";
121 //child.setNodeValue(format_string);
122 //child.appendChild(text);
123 result.appendChild(page_response);
124 return result;
125 } else {
126 String name = (String)params.get(GSParams.SYSTEM_MODULE_NAME);
127 String type = (String)params.get(GSParams.SYSTEM_MODULE_TYPE);
128
129 system.setAttribute(GSXML.SYSTEM_MODULE_NAME_ATT, name);
130 system.setAttribute(GSXML.SYSTEM_MODULE_TYPE_ATT, type);
131
132 if (subaction.equals("d")) { // delete
133 system.setAttribute(GSXML.TYPE_ATT, GSXML.SYSTEM_TYPE_DEACTIVATE);
134
135 } else if (subaction.equals("a")) { // add
136 system.setAttribute(GSXML.TYPE_ATT, GSXML.SYSTEM_TYPE_ACTIVATE);
137 } else {
138 // create the default response
139 // for now just have an error
140 logger.error("bad subaction type");
141 Element page_response = this.doc.createElement(GSXML.RESPONSE_ELEM);
142 result.appendChild(page_response);
143
144 return result;
145 }
146 }
147
148 Node response_message = this.mr.process(mr_request_message);
149
150 result.appendChild(GSXML.duplicateWithNewName(this.doc, (Element)GSXML.getChildByTagName(response_message, GSXML.RESPONSE_ELEM), GSXML.RESPONSE_ELEM, true));
151 return result;
152
153 }
154
155 /*
156 public void parse (String message) {
157 //get a factory
158 SAXParserFactory spf = SAXParserFactory.newInstance();
159 try {
160
161 //get a new instance of parser
162 SAXParser sp = spf.newSAXParser();
163 InputSource is = new InputSource( new StringReader( message ) );
164 //parse the file and also register this class for call backs
165 sp.parse(is, new SamParser());
166
167 }catch(SAXException se) {
168 se.printStackTrace();
169 }catch(ParserConfigurationException pce) {
170 pce.printStackTrace();
171 }catch (IOException ie) {
172 ie.printStackTrace();
173 }
174 }
175 */
176
177 //Event Handlers
178/* public void startElement(String uri, String localName, String qName,
179 Attributes attributes) throws SAXException {
180 //reset
181 logger.error("Start Element: "+qName);
182 //if(qName.equalsIgnoreCase("Template")) {
183 //create a new instance of employee
184 //tempEmp = new Employee();
185 //tempEmp.setType(attributes.getValue("type"));
186
187 //}
188 }
189
190
191 public void characters(char[] ch, int start, int length) throws SAXException {
192 tempVal = new String(ch,start,length);
193 }
194
195 public void endElement(String uri, String localName,
196 String qName) throws SAXException {
197
198 logger.error("Characters: "+tempVal);
199 logger.error("End Element: "+qName);
200 /*
201 if(qName.equalsIgnoreCase("Employee")) {
202 //add it to the list
203 myEmpls.add(tempEmp);
204
205 }else if (qName.equalsIgnoreCase("Name")) {
206 tempEmp.setName(tempVal);
207 }else if (qName.equalsIgnoreCase("Id")) {
208 tempEmp.setId(Integer.parseInt(tempVal));
209 }else if (qName.equalsIgnoreCase("Age")) {
210 tempEmp.setAge(Integer.parseInt(tempVal));
211 } */
212
213 //}
214
215}
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