1 | package org.greenstone.gsdl3.action;
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2 |
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3 | import java.io.Serializable;
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4 | import java.util.HashMap;
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5 |
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6 | import org.apache.log4j.Logger;
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7 | import org.greenstone.gsdl3.util.GSParams;
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8 | import org.greenstone.gsdl3.util.GSPath;
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9 | import org.greenstone.gsdl3.util.GSXML;
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10 | import org.greenstone.gsdl3.util.UserContext;
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11 | import org.greenstone.gsdl3.util.XMLConverter;
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12 | import org.greenstone.util.GlobalProperties;
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13 | import org.w3c.dom.Document;
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14 | import org.w3c.dom.Element;
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15 | import org.w3c.dom.Node;
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16 | import org.w3c.dom.NodeList;
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17 |
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18 | public class PageAction extends Action
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19 | {
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20 | static Logger logger = Logger.getLogger(org.greenstone.gsdl3.action.PageAction.class.getName());
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21 |
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22 | public static final String HOME_PAGE = "home";
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23 | public static final String ABOUT_PAGE = "about";
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24 | public static final String PREFS_PAGE = "pref";
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25 | public static final String GLI4GS3_PAGE = "gli4gs3";
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26 |
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27 | public Node process(Node message_node)
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28 |
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29 | {
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30 | Element message = GSXML.nodeToElement(message_node);
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31 | Document doc = XMLConverter.newDOM();
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32 |
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33 | Element request = (Element) GSXML.getChildByTagName(message, GSXML.REQUEST_ELEM);
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34 | Element paramList = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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35 | String collection = "";
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36 | if (paramList != null)
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37 | {
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38 | HashMap<String, Serializable> params = GSXML.extractParams(paramList, false);
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39 | if (params != null && params.get(GSParams.COLLECTION) != null)
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40 | {
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41 | collection = (String) params.get(GSParams.COLLECTION);
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42 | }
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43 | }
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44 |
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45 | // the page name is the subaction
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46 | String page_name = request.getAttribute(GSXML.SUBACTION_ATT);
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47 | if (page_name.equals(""))
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48 | { // if no page specified, assume home page
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49 | page_name = HOME_PAGE;
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50 | }
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51 | Element result = doc.createElement(GSXML.MESSAGE_ELEM);
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52 | Element response;
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53 | if (page_name.equals(HOME_PAGE))
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54 | {
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55 | response = homePage(request);
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56 | //} else if (page_name.equals(ABOUT_PAGE)) {
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57 | }
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58 | else if (page_name.equals(ABOUT_PAGE) || page_name.equals(PREFS_PAGE))
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59 | {
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60 | response = aboutPage(request);
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61 | //}else if (page_name.equals(PREFS_PAGE)) {
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62 | //response = prefsPage(request);
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63 | }
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64 | else if (page_name.equals(GLI4GS3_PAGE))
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65 | {
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66 | response = gli4gs3Page(request);
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67 | }
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68 | else
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69 | { // unknown page
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70 | response = unknownPage(request);
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71 | }
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72 |
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73 | Element formatMessage = doc.createElement(GSXML.MESSAGE_ELEM);
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74 | Element formatRequest = GSXML.createBasicRequest(doc, GSXML.REQUEST_TYPE_FORMAT, collection, new UserContext(request));
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75 | formatMessage.appendChild(formatRequest);
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76 | Element formatResponseMessage = (Element) this.mr.process(formatMessage);
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77 | Element formatResponse = (Element) GSXML.getChildByTagName(formatResponseMessage, GSXML.RESPONSE_ELEM);
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78 |
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79 | Element globalFormat = (Element) GSXML.getChildByTagName(formatResponse, GSXML.FORMAT_ELEM);
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80 | if (globalFormat != null)
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81 | {
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82 | response.appendChild(response.getOwnerDocument().importNode(globalFormat, true));
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83 | }
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84 |
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85 | result.appendChild(doc.importNode(response, true));
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86 | logger.debug("page action result: " + this.converter.getPrettyString(result));
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87 |
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88 | return result;
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89 | }
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90 |
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91 | protected Element homePage(Element request)
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92 | {
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93 | Document doc = XMLConverter.newDOM();
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94 |
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95 |
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96 | UserContext userContext = new UserContext(request);
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97 | // first, get the message router info
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98 | Element info_message = doc.createElement(GSXML.MESSAGE_ELEM);
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99 | Element info_request = GSXML.createBasicRequest(doc, GSXML.REQUEST_TYPE_DESCRIBE, "", userContext);
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100 | //Create param list
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101 | Element param_list_element = doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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102 | info_request.appendChild(param_list_element);
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103 | //Describe params without collectionlist. Collectionlist provided by CollectionGroup service
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104 | GSXML.addParameterToList(param_list_element, GSXML.SUBSET_PARAM, GSXML.CLUSTER_ELEM + GSXML.LIST_MODIFIER);
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105 | GSXML.addParameterToList(param_list_element, GSXML.SUBSET_PARAM, GSXML.SERVICE_ELEM + GSXML.LIST_MODIFIER);
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106 | GSXML.addParameterToList(param_list_element, GSXML.SUBSET_PARAM, GSXML.SITE_ELEM + GSXML.LIST_MODIFIER);
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107 | GSXML.addParameterToList(param_list_element, GSXML.SUBSET_PARAM, GSXML.METADATA_ELEM + GSXML.LIST_MODIFIER);
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108 | GSXML.addParameterToList(param_list_element, GSXML.SUBSET_PARAM, GSXML.DISPLAY_TEXT_ELEM + GSXML.LIST_MODIFIER);
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109 | info_message.appendChild(info_request);
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110 | //Send request to message router
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111 | Element info_response_message = (Element) this.mr.process(info_message);
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112 | //Check if it is not null
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113 | if (info_response_message == null)
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114 | {
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115 | logger.error(" couldn't query the message router!");
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116 | return null;
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117 | }
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118 | //Check if it is not null
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119 | Element info_response = (Element) GSXML.getChildByTagName(info_response_message, GSXML.RESPONSE_ELEM);
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120 | if (info_response == null)
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121 | {
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122 | logger.error("couldn't query the message router!");
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123 | return null;
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124 | }
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125 |
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126 | Element resp_service_list = (Element) GSXML.getChildByTagName(info_response, GSXML.SERVICE_ELEM + GSXML.LIST_MODIFIER);
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127 |
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128 | if (resp_service_list == null) {
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129 | logger.error("No services available. Couldn't query the message router!");
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130 | return null;
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131 | }
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132 | Element groupInfoService = GSXML.getNamedElement(resp_service_list, GSXML.SERVICE_ELEM, GSXML.TYPE_ATT,
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133 | GSXML.SERVICE_TYPE_GROUPINFO);
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134 | if (groupInfoService != null) {
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135 | // Prepare request for CollectionGroup service to get current
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136 | // collections and groups list
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137 | Element group_info_message = doc.createElement(GSXML.MESSAGE_ELEM);
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138 | Element group_info_request = GSXML.createBasicRequest(doc, GSXML.TO_ATT,
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139 | groupInfoService.getAttribute(GSXML.NAME_ATT), userContext);
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140 | group_info_message.appendChild(group_info_request);
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141 | //Append group request if exists
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142 | Element paramList = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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143 | if (paramList != null) {
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144 | group_info_request.appendChild(doc.importNode(paramList, true));
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145 | }
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146 | Element group_info_response_message = (Element) this.mr.process(group_info_message);
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147 | Element group_info_response = (Element) GSXML.getChildByTagName(group_info_response_message,
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148 | GSXML.RESPONSE_ELEM);
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149 | Element collection_list = (Element) GSXML.getChildByTagName(group_info_response,
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150 | GSXML.COLLECTION_ELEM + GSXML.LIST_MODIFIER);
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151 | // Add Collection List from CollectionGroup Service to response
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152 | // from message router
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153 | info_response = (Element) doc.importNode(info_response, true);
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154 | if (collection_list != null) {
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155 | info_response.appendChild(doc.importNode(collection_list, true));
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156 | }
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157 | Element group_list = (Element) GSXML.getChildByTagName(group_info_response,
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158 | GSXML.GROUP_ELEM + GSXML.LIST_MODIFIER);
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159 | if (group_list != null) {
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160 | info_response.appendChild(doc.importNode(group_list, true));
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161 | }
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162 | Element path_list = (Element) GSXML.getChildByTagName(group_info_response,
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163 | GSXML.PATH_ELEM + GSXML.LIST_MODIFIER);
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164 | if (path_list != null) {
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165 | info_response.appendChild(doc.importNode(path_list, true));
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166 | }
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167 | // Send message to groupInfoType Services
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168 | } else {
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169 | // If no service with type SERVICE_TYPE_GROUPINFO could be provided
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170 | // request message router for all available collections
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171 | GSXML.addParameterToList(param_list_element, GSXML.SUBSET_PARAM,
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172 | GSXML.COLLECTION_ELEM + GSXML.LIST_MODIFIER);
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173 | info_response_message = (Element) this.mr.process(info_message);
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174 |
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175 | if (info_response_message == null) {
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176 | logger.error(" couldn't query the message router!");
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177 | return null;
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178 | }
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179 | info_response = (Element) GSXML.getChildByTagName(info_response_message, GSXML.RESPONSE_ELEM);
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180 | if (info_response == null) {
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181 | logger.error("couldn't query the message router!");
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182 | return null;
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183 | }
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184 | }
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185 |
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186 | // second, get the metadata for each collection - we only want specific
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187 | // elements but for now, we'll just get it all
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188 | Element collection_list = (Element) GSXML.getChildByTagName(info_response, GSXML.COLLECTION_ELEM + GSXML.LIST_MODIFIER);
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189 | //logger.debug(GSXML.xmlNodeToString(collection_list));
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190 | if (collection_list != null)
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191 | {
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192 | NodeList colls = GSXML.getChildrenByTagName(collection_list, GSXML.COLLECTION_ELEM);
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193 | if (colls.getLength() > 0)
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194 | {
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195 | sendMultipleRequests(doc, colls, null, GSXML.REQUEST_TYPE_DESCRIBE, userContext);
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196 | }
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197 | }
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198 |
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199 | // get metadata for any services
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200 | Element service_list = (Element) GSXML.getChildByTagName(info_response, GSXML.SERVICE_ELEM + GSXML.LIST_MODIFIER);
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201 | if (service_list != null)
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202 | {
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203 | NodeList services = GSXML.getChildrenByTagName(service_list, GSXML.SERVICE_ELEM);
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204 | if (services.getLength() > 0)
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205 | {
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206 | sendMultipleRequests(doc, services, null, GSXML.REQUEST_TYPE_DESCRIBE, userContext);
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207 | }
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208 | }
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209 |
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210 | // get metadata for service clusters
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211 | Element cluster_list = (Element) GSXML.getChildByTagName(info_response, GSXML.CLUSTER_ELEM + GSXML.LIST_MODIFIER);
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212 | if (cluster_list != null)
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213 | {
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214 | NodeList clusters = GSXML.getChildrenByTagName(cluster_list, GSXML.CLUSTER_ELEM);
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215 | if (clusters.getLength() > 0)
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216 | {
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217 | sendMultipleRequests(doc, clusters, null, GSXML.REQUEST_TYPE_DESCRIBE, userContext);
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218 |
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219 | }
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220 | }
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221 |
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222 | addSiteMetadata(info_response, userContext);
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223 | addInterfaceOptions(info_response);
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224 | // all the components have been merged into info_response
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225 | return info_response;
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226 |
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227 | } // homePage
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228 |
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229 | protected Element aboutPage(Element request)
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230 | {
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231 | Document doc = XMLConverter.newDOM();
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232 |
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233 | UserContext userContext = new UserContext(request);
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234 | // extract the params from the cgi-request,
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235 | Element cgi_paramList = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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236 | HashMap<String, Serializable> params = GSXML.extractParams(cgi_paramList, false);
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237 |
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238 | String coll_name = (String) params.get(GSParams.COLLECTION);
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239 | if (coll_name == null || coll_name.equals(""))
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240 | {
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241 | logger.error("about page requested with no collection or cluster specified!");
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242 | // return an empty response
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243 | Element response = doc.createElement(GSXML.RESPONSE_ELEM);
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244 | addSiteMetadata(response, userContext);
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245 | addInterfaceOptions(response);
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246 | return response;
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247 | }
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248 |
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249 | // get the collection or cluster description
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250 | Element coll_about_message = doc.createElement(GSXML.MESSAGE_ELEM);
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251 |
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252 | Element coll_about_request = GSXML.createBasicRequest(doc, GSXML.REQUEST_TYPE_DESCRIBE, coll_name, userContext);
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253 | coll_about_message.appendChild(coll_about_request);
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254 | Element coll_about_response = (Element) this.mr.process(coll_about_message);
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255 |
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256 | // add collection type attribute to paramList
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257 | String col_type = "";
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258 | NodeList collect_elem = coll_about_response.getElementsByTagName(GSXML.COLLECTION_ELEM);
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259 | if (collect_elem.getLength() != 0)
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260 | {
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261 | for (int i = 0; i < collect_elem.getLength(); i++)
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262 | {
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263 | Element e = (Element) collect_elem.item(i);
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264 | col_type = e.getAttribute(GSXML.TYPE_ATT);
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265 | }
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266 | }
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267 | else
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268 | {
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269 | logger.error(GSXML.COLLECTION_ELEM + " element is null");
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270 | }
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271 |
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272 | // adding a ct param to paramlist. only needed for gs2 interface, not default
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273 | NodeList paramList_list = request.getElementsByTagName(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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274 | if (paramList_list.getLength() != 0)
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275 | {
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276 | for (int i = 0; i < paramList_list.getLength(); i++)
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277 | {
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278 | Element e = (Element) paramList_list.item(i);
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279 | Element ct = GSXML.createParameter(request.getOwnerDocument(), GSParams.COLLECTION_TYPE, col_type.equalsIgnoreCase("mg") ? "0" : "1");
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280 | e.appendChild(ct);
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281 | }
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282 | }
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283 | else
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284 | {
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285 | logger.info("paramList is null!!");
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286 | }
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287 |
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288 | if (coll_about_response == null)
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289 | {
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290 | return null;
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291 | }
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292 |
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293 | // second, get the info for each service - we only want display items
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294 | // but for now, we'll just get it all
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295 | NodeList services = coll_about_response.getElementsByTagName(GSXML.SERVICE_ELEM);
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296 | if (services.getLength() > 0)
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297 | {
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298 | sendMultipleRequests(doc, services, coll_name, GSXML.REQUEST_TYPE_DESCRIBE, userContext);
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299 | }
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300 |
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301 | Element response = (Element) GSXML.getChildByTagName(coll_about_response, GSXML.RESPONSE_ELEM);
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302 | //add the site metadata
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303 | addSiteMetadata(response, userContext);
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304 | addInterfaceOptions(response);
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305 | return response;
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306 | }
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307 |
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308 | //protected Element prefsPage(Element request) {
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309 |
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310 | // return null;
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311 | //}
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312 |
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313 | /** if we dont know the page type, use this method */
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314 | protected Element unknownPage(Element request)
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315 | {
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316 | Document doc = XMLConverter.newDOM();
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317 |
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318 | UserContext userContext = new UserContext(request);
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319 | String page_name = request.getAttribute(GSXML.SUBACTION_ATT);
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320 |
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321 | // extract the params from the cgi-request,
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322 | Element cgi_paramList = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
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323 | HashMap<String, Serializable> params = GSXML.extractParams(cgi_paramList, false);
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324 |
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325 | String coll_name = (String) params.get(GSParams.COLLECTION);
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326 | if (coll_name == null || coll_name.equals(""))
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327 | {
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328 | // just return an empty response
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329 | Element response = doc.createElement(GSXML.RESPONSE_ELEM);
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330 | addSiteMetadata(response, userContext);
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331 | addInterfaceOptions(response);
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332 | return response;
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333 | }
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334 |
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335 | // else get the coll description - actually this is the same as for the about page - should we merge these two methods??
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336 |
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337 | // if there is a service specified should we get the service description instead??
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338 | // get the collection or cluster description
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339 | Element coll_about_message = doc.createElement(GSXML.MESSAGE_ELEM);
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340 |
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341 | Element coll_about_request = GSXML.createBasicRequest(doc, GSXML.REQUEST_TYPE_DESCRIBE, coll_name, userContext);
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342 | coll_about_message.appendChild(coll_about_request);
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343 |
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344 | Element coll_about_response = (Element) this.mr.process(coll_about_message);
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345 |
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346 | Element response = (Element) GSXML.getChildByTagName(coll_about_response, GSXML.RESPONSE_ELEM);
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347 |
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348 | //add the site metadata
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349 | addSiteMetadata(response, userContext);
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350 | addInterfaceOptions(response);
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351 |
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352 | return response;
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353 |
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354 | }
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355 |
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356 | protected boolean sendMultipleRequests(Document doc, NodeList items, String path_prefix, String request_type, UserContext userContext)
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357 | {
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358 | // we will send all the requests in a single message
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359 | Element message = doc.createElement(GSXML.MESSAGE_ELEM);
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360 | for (int i = 0; i < items.getLength(); i++)
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361 | {
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362 | Element c = (Element) items.item(i);
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363 | String path = c.getAttribute(GSXML.NAME_ATT);
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364 | if (path_prefix != null)
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365 | {
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366 | path = GSPath.appendLink(path_prefix, path);
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367 | }
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368 | Element request = GSXML.createBasicRequest(doc, request_type, path, userContext);
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369 | message.appendChild(request);
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370 | }
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371 |
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372 | Element response_message = (Element) this.mr.process(message);
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373 |
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374 | NodeList responses = response_message.getElementsByTagName(GSXML.RESPONSE_ELEM);
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375 | // check that have same number of responses as requests
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376 | if (items.getLength() != responses.getLength())
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377 | {
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378 | logger.error("didn't get a response for each request - somethings gone wrong!");
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379 | return false;
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380 | }
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381 |
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382 | for (int i = 0; i < items.getLength(); i++)
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383 | {
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384 | Element c1 = (Element) items.item(i);
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385 | Element c2 = (Element) GSXML.getChildByTagName((Element) responses.item(i), c1.getTagName());
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386 | if (c1 != null && c2 != null && c1.getAttribute(GSXML.NAME_ATT).endsWith(c2.getAttribute(GSXML.NAME_ATT)))
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387 | {
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388 | //add the new data into the original element
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389 | GSXML.mergeElements(c1, c2);
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390 | }
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391 | else
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392 | {
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393 | logger.debug(" response does not correspond to request!");
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394 | }
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395 |
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396 | }
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397 |
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398 | return true;
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399 |
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400 | }
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401 |
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402 | protected Element gli4gs3Page(Element request)
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403 | {
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404 | Document doc = XMLConverter.newDOM();
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405 |
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406 | String lang = request.getAttribute(GSXML.LANG_ATT);
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407 | String uid = request.getAttribute(GSXML.USER_ID_ATT);
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408 |
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409 | Element page_response = doc.createElement(GSXML.RESPONSE_ELEM);
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410 |
|
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411 | Element applet_elem = doc.createElement("Applet");
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412 | page_response.appendChild(applet_elem);
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413 | applet_elem.setAttribute("ARCHIVE", "SignedGatherer.jar");
|
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414 | applet_elem.setAttribute("CODE", "org.greenstone.gatherer.GathererApplet");
|
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415 | applet_elem.setAttribute("CODEBASE", "applet");
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416 | applet_elem.setAttribute("HEIGHT", "50");
|
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417 | applet_elem.setAttribute("WIDTH", "380");
|
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418 | Element gwcgi_param_elem = doc.createElement("PARAM");
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419 | gwcgi_param_elem.setAttribute("name", "gwcgi");
|
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420 | String library_name = GlobalProperties.getGSDL3WebAddress();
|
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421 | gwcgi_param_elem.setAttribute("value", library_name);
|
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422 | applet_elem.appendChild(gwcgi_param_elem);
|
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423 |
|
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424 | Element gsdl3_param_elem = doc.createElement("PARAM");
|
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425 | gsdl3_param_elem.setAttribute("name", "gsdl3");
|
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426 | gsdl3_param_elem.setAttribute("value", "true");
|
---|
427 | applet_elem.appendChild(gsdl3_param_elem);
|
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428 |
|
---|
429 | return page_response;
|
---|
430 | }
|
---|
431 | }
|
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