1 | /** |
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2 | * This software is copyright (c) 2013-2022 by |
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3 | * - Leibniz-Institut fuer Deutsche Sprache (http://www.ids-mannheim.de) |
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4 | * This is free software. You can redistribute it |
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5 | * and/or modify it under the terms described in |
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6 | * the GNU General Public License v3 of which you |
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7 | * should have received a copy. Otherwise you can download |
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8 | * it from |
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9 | * |
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10 | * http://www.gnu.org/licenses/gpl-3.0.txt |
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11 | * |
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12 | * @copyright Leibniz-Institut fuer Deutsche Sprache (http://www.ids-mannheim.de) |
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13 | * |
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14 | * @license http://www.gnu.org/licenses/gpl-3.0.txt |
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15 | * GNU General Public License v3 |
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16 | */ |
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17 | package eu.clarin.sru.server.fcs; |
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18 | |
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19 | import java.io.File; |
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20 | import java.io.InputStream; |
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21 | import java.net.URI; |
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22 | import java.util.List; |
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23 | import java.util.Map; |
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24 | import java.util.Map.Entry; |
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25 | |
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26 | import javax.servlet.ServletContext; |
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27 | import javax.xml.XMLConstants; |
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28 | import javax.xml.stream.XMLStreamException; |
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29 | import javax.xml.stream.XMLStreamWriter; |
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30 | |
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31 | import org.slf4j.Logger; |
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32 | import org.slf4j.LoggerFactory; |
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33 | import org.z3950.zing.cql.CQLNode; |
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34 | import org.z3950.zing.cql.CQLTermNode; |
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35 | |
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36 | import eu.clarin.sru.server.SRUAuthenticationInfoProvider; |
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37 | import eu.clarin.sru.server.SRUConfigException; |
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38 | import eu.clarin.sru.server.SRUConstants; |
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39 | import eu.clarin.sru.server.SRUDiagnosticList; |
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40 | import eu.clarin.sru.server.SRUException; |
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41 | import eu.clarin.sru.server.SRUExplainResult; |
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42 | import eu.clarin.sru.server.SRUQueryParserRegistry; |
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43 | import eu.clarin.sru.server.SRURequest; |
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44 | import eu.clarin.sru.server.SRUScanResultSet; |
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45 | import eu.clarin.sru.server.SRUSearchEngine; |
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46 | import eu.clarin.sru.server.SRUServer; |
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47 | import eu.clarin.sru.server.SRUServerConfig; |
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48 | import eu.clarin.sru.server.fcs.utils.AuthenticationProvider; |
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49 | import eu.clarin.sru.server.utils.SRUAuthenticationInfoProviderFactory; |
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50 | import eu.clarin.sru.server.utils.SRUSearchEngineBase; |
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51 | |
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52 | |
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53 | /** |
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54 | * A base class for implementing a simple search engine to be used as a |
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55 | * CLARIN-FCS endpoint. |
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56 | * |
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57 | */ |
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58 | public abstract class SimpleEndpointSearchEngineBase extends |
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59 | SRUSearchEngineBase implements SRUAuthenticationInfoProviderFactory { |
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60 | public static final String FCS_AUTHENTICATION_ENABLE_PARAM = |
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61 | "eu.clarin.sru.server.fcs.authentication.enable"; |
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62 | public static final String FCS_AUTHENTICATION_AUDIENCE_PARAM = |
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63 | "eu.clarin.sru.server.fcs.authentication.audience"; |
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64 | public static final String FCS_AUTHENTICATION_IGNORE_ISSUEDAT_PARAM = |
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65 | "eu.clarin.sru.server.fcs.authentication.ignoreIssuedAt"; |
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66 | public static final String FCS_AUTHENTICATION_ACCEPT_ISSUEDAT_PARAM = |
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67 | "eu.clarin.sru.server.fcs.authentication.acceptIssuedAt"; |
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68 | public static final String FCS_AUTHENTICATION_ACCEPT_EXPIRESAT_PARAM = |
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69 | "eu.clarin.sru.server.fcs.authentication.acceptExpiresAt"; |
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70 | public static final String FCS_AUTHENTICATION_ACCEPT_NOTBEFORE_PARAM = |
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71 | "eu.clarin.sru.server.fcs.authentication.acceptNotBefore"; |
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72 | public static final String FCS_AUTHENTICATION_PUBLIC_KEY_PARAM_PREFIX = |
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73 | "eu.clarin.sru.server.fcs.authentication.key."; |
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74 | private static final String RESOURCE_URI_PREFIX = "resource:"; |
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75 | private static final String X_FCS_ENDPOINT_DESCRIPTION = |
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76 | "x-fcs-endpoint-description"; |
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77 | private static final String ED_NS = |
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78 | "http://clarin.eu/fcs/endpoint-description"; |
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79 | private static final String ED_PREFIX = "ed"; |
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80 | private static final Logger logger = |
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81 | LoggerFactory.getLogger(SimpleEndpointSearchEngineBase.class); |
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82 | protected EndpointDescription endpointDescription; |
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83 | |
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84 | |
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85 | /** |
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86 | * This method should not be overridden. Perform your custom initialization |
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87 | * in the |
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88 | * {@link #doInit(ServletContext, SRUServerConfig, eu.clarin.sru.server.SRUQueryParserRegistry.Builder, Map)} |
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89 | * method instead. |
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90 | * |
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91 | * @see #doInit(ServletContext, SRUServerConfig, |
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92 | * eu.clarin.sru.server.SRUQueryParserRegistry.Builder, Map) |
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93 | */ |
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94 | @Override |
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95 | public final void init(ServletContext context, |
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96 | SRUServerConfig config, |
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97 | SRUQueryParserRegistry.Builder parserReqistryBuilder, |
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98 | Map<String, String> params) throws SRUConfigException { |
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99 | logger.debug("initializing"); |
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100 | super.init(context, config, parserReqistryBuilder, params); |
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101 | |
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102 | parserReqistryBuilder.register(new FCSQueryParser()); |
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103 | |
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104 | logger.debug("initializing search engine implementation"); |
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105 | doInit(context, config, parserReqistryBuilder, params); |
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106 | |
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107 | logger.debug("initizalizing endpoint description"); |
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108 | this.endpointDescription = |
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109 | createEndpointDescription(context, config, params); |
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110 | if (this.endpointDescription == null) { |
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111 | logger.error("SimpleEndpointSearchEngineBase implementation " + |
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112 | "error: createEndpointDescription() returned null"); |
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113 | throw new SRUConfigException("createEndpointDescription() " + |
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114 | "returned no valid implementation of an EndpointDescription"); |
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115 | } |
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116 | } |
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117 | |
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118 | |
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119 | /** |
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120 | * This method should not be overridden. Perform you custom cleanup in the |
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121 | * {@link #doDestroy()} method. |
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122 | * |
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123 | * @see #doDestroy() |
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124 | */ |
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125 | @Override |
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126 | public final void destroy() { |
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127 | logger.debug("performing cleanup of endpoint description"); |
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128 | endpointDescription.destroy(); |
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129 | logger.debug("performing cleanup of search engine"); |
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130 | doDestroy(); |
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131 | super.destroy(); |
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132 | } |
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133 | |
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134 | |
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135 | @Override |
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136 | public SRUAuthenticationInfoProvider createAuthenticationInfoProvider( |
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137 | ServletContext context, Map<String, String> params) |
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138 | throws SRUConfigException { |
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139 | String enableAuthentication = params.get(FCS_AUTHENTICATION_ENABLE_PARAM); |
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140 | if (enableAuthentication != null) { |
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141 | if (parseBoolean(enableAuthentication)) { |
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142 | logger.debug("enabling authentication"); |
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143 | AuthenticationProvider.Builder builder = |
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144 | AuthenticationProvider.Builder.create(); |
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145 | |
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146 | String audience = params.get(FCS_AUTHENTICATION_AUDIENCE_PARAM); |
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147 | if (audience != null) { |
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148 | String[] values = audience.split("\\s*,\\s*"); |
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149 | if (values != null) { |
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150 | for (String value : values) { |
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151 | logger.debug("adding audience: {}", value); |
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152 | builder.withAudience(value); |
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153 | } |
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154 | } else { |
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155 | logger.debug("adding audience: {}", audience); |
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156 | builder.withAudience(audience); |
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157 | } |
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158 | } |
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159 | |
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160 | boolean ignoreIssuedAt = parseBoolean( |
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161 | params.get(FCS_AUTHENTICATION_IGNORE_ISSUEDAT_PARAM)); |
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162 | if (ignoreIssuedAt) { |
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163 | logger.debug("will not verify 'iat' claim"); |
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164 | builder.withIgnoreIssuedAt(); |
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165 | } else { |
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166 | long issuedAtLeeway = parseLong( |
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167 | params.get(FCS_AUTHENTICATION_ACCEPT_ISSUEDAT_PARAM), -1); |
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168 | if (issuedAtLeeway > 0) { |
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169 | logger.debug("allowing {} seconds leeway for 'iat' claim", issuedAtLeeway); |
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170 | builder.withIssuedAt(issuedAtLeeway); |
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171 | } |
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172 | } |
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173 | long expiresAtLeeway = parseLong( |
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174 | params.get(FCS_AUTHENTICATION_ACCEPT_EXPIRESAT_PARAM), -1); |
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175 | if (expiresAtLeeway > 0) { |
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176 | logger.debug("allowing {} seconds leeway for 'exp' claim", expiresAtLeeway); |
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177 | builder.withExpiresAt(expiresAtLeeway); |
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178 | } |
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179 | |
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180 | long notBeforeLeeway = parseLong( |
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181 | params.get(FCS_AUTHENTICATION_ACCEPT_NOTBEFORE_PARAM), -1); |
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182 | if (notBeforeLeeway > 0) { |
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183 | logger.debug("allowing {} seconds leeway for 'nbf' claim", expiresAtLeeway); |
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184 | builder.withNotBefore(notBeforeLeeway); |
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185 | } |
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186 | |
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187 | // load keys |
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188 | for (Entry<String, String> entry : params.entrySet()) { |
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189 | if (entry.getKey().startsWith(FCS_AUTHENTICATION_PUBLIC_KEY_PARAM_PREFIX)) { |
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190 | String keyId = entry.getKey().substring(FCS_AUTHENTICATION_PUBLIC_KEY_PARAM_PREFIX.length()).trim(); |
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191 | if (keyId.isEmpty()) { |
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192 | throw new SRUConfigException("init-parameter: '" + entry.getKey() + "' is invalid: keyId is empty!"); |
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193 | } |
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194 | String keyFileName = entry.getValue(); |
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195 | logger.debug("keyId = {}, keyFile = {}", keyId, keyFileName); |
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196 | if (keyFileName.regionMatches(0, RESOURCE_URI_PREFIX, 0, RESOURCE_URI_PREFIX.length())) { |
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197 | String path = keyFileName.substring(RESOURCE_URI_PREFIX.length()); |
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198 | logger.debug("loading key '{}' from resource '{}'", keyId, keyFileName); |
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199 | InputStream in = context.getResourceAsStream(path); |
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200 | builder.withPublicKey(keyId, in); |
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201 | } else { |
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202 | logger.debug("loading key '{}' from file '{}'", keyId, keyFileName); |
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203 | builder.withPublicKey(keyId, new File(keyFileName)); |
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204 | } |
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205 | } |
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206 | } |
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207 | AuthenticationProvider authenticationProvider = builder.build(); |
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208 | if (authenticationProvider.getKeyCount() == 0) { |
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209 | logger.warn("No keys configured, all well-formed tokens will be accepted. Make sure, youn know what you are doing!"); |
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210 | } |
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211 | return authenticationProvider; |
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212 | } else { |
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213 | logger.debug("explictly disable authentication"); |
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214 | } |
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215 | } |
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216 | return null; |
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217 | } |
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218 | |
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219 | |
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220 | @Override |
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221 | public final SRUExplainResult explain(SRUServerConfig config, |
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222 | SRURequest request, SRUDiagnosticList diagnostics) |
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223 | throws SRUException { |
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224 | |
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225 | final boolean provideEndpointDescription = |
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226 | parseBoolean(request.getExtraRequestData( |
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227 | X_FCS_ENDPOINT_DESCRIPTION)); |
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228 | |
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229 | if (provideEndpointDescription) { |
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230 | return new SRUExplainResult(diagnostics) { |
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231 | @Override |
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232 | public boolean hasExtraResponseData() { |
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233 | return provideEndpointDescription; |
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234 | } |
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235 | |
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236 | |
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237 | @Override |
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238 | public void writeExtraResponseData(XMLStreamWriter writer) |
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239 | throws XMLStreamException { |
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240 | writeEndpointDescription(writer); |
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241 | } |
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242 | }; |
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243 | } else { |
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244 | return null; |
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245 | } |
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246 | } |
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247 | |
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248 | |
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249 | /** |
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250 | * Handle a <em>scan</em> operation. This implementation provides support to |
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251 | * CLARIN FCS resource enumeration. If you want to provide custom scan |
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252 | * behavior for a different index, override the |
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253 | * {@link #doScan(SRUServerConfig, SRURequest, SRUDiagnosticList)} method. |
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254 | * |
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255 | * @see #doScan(SRUServerConfig, SRURequest, SRUDiagnosticList) |
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256 | */ |
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257 | @Override |
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258 | public final SRUScanResultSet scan(SRUServerConfig config, |
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259 | SRURequest request, SRUDiagnosticList diagnostics) |
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260 | throws SRUException { |
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261 | return doScan(config, request, diagnostics); |
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262 | } |
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263 | |
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264 | |
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265 | protected abstract EndpointDescription createEndpointDescription( |
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266 | ServletContext context, SRUServerConfig config, |
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267 | Map<String, String> params) throws SRUConfigException; |
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268 | |
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269 | |
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270 | /** |
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271 | * Initialize the search engine. This initialization should be tailed |
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272 | * towards your environment and needs. |
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273 | * |
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274 | * @param context |
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275 | * the {@link ServletContext} for the Servlet |
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276 | * @param config |
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277 | * the {@link SRUServerConfig} object for this search engine |
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278 | * @param queryParsersBuilder |
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279 | * the {@link SRUQueryParserRegistry.Builder} object to be used |
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280 | * for this search engine. Use to register additional query |
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281 | * parsers with the {@link SRUServer}. |
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282 | * @param params |
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283 | * additional parameters gathered from the Servlet configuration |
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284 | * and Servlet context. |
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285 | * @throws SRUConfigException |
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286 | * if an error occurred |
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287 | */ |
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288 | protected abstract void doInit(ServletContext context, |
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289 | SRUServerConfig config, |
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290 | SRUQueryParserRegistry.Builder queryParsersBuilder, |
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291 | Map<String, String> params) throws SRUConfigException; |
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292 | |
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293 | |
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294 | /** |
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295 | * Destroy the search engine. Override this method for any cleanup the |
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296 | * search engine needs to perform upon termination. |
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297 | */ |
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298 | protected void doDestroy() { |
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299 | } |
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300 | |
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301 | |
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302 | /** |
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303 | * Handle a <em>scan</em> operation. The default implementation is a no-op. |
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304 | * Override this method, if you want to provide a custom behavior. |
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305 | * |
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306 | * @param config |
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307 | * the <code>SRUEndpointConfig</code> object that contains the |
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308 | * endpoint configuration |
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309 | * @param request |
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310 | * the <code>SRURequest</code> object that contains the request |
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311 | * made to the endpoint |
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312 | * @param diagnostics |
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313 | * the <code>SRUDiagnosticList</code> object for storing |
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314 | * non-fatal diagnostics |
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315 | * @return a <code>SRUScanResultSet</code> object or <code>null</code> if |
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316 | * this operation is not supported by this search engine |
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317 | * @throws SRUException |
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318 | * if an fatal error occurred |
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319 | * @see SRUSearchEngine#scan(SRUServerConfig, SRURequest, SRUDiagnosticList) |
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320 | * @deprecated override |
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321 | * {@link #scan(SRUServerConfig, SRURequest, SRUDiagnosticList)} |
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322 | */ |
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323 | @Deprecated |
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324 | protected SRUScanResultSet doScan(SRUServerConfig config, |
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325 | SRURequest request, SRUDiagnosticList diagnostics) |
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326 | throws SRUException { |
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327 | final CQLNode scanClause = request.getScanClause(); |
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328 | if (scanClause instanceof CQLTermNode) { |
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329 | final CQLTermNode root = (CQLTermNode) scanClause; |
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330 | final String index = root.getIndex(); |
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331 | throw new SRUException(SRUConstants.SRU_UNSUPPORTED_INDEX, index, |
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332 | "scan operation on index '" + index + "' is not supported"); |
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333 | } else { |
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334 | throw new SRUException(SRUConstants.SRU_QUERY_FEATURE_UNSUPPORTED, |
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335 | "Scan clause too complex."); |
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336 | } |
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337 | } |
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338 | |
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339 | |
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340 | /** |
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341 | * Convince method for parsing a string to boolean. Values <code>1</code>, |
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342 | * <code>true</code>, <code>yes</code> yield a <em>true</em> boolean value |
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343 | * as a result, all others (including <code>null</code>) a <em>false</em> |
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344 | * boolean value. |
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345 | * |
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346 | * @param value |
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347 | * the string to parse |
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348 | * @return <code>true</code> if the supplied string was considered something |
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349 | * representing a <em>true</em> boolean value, <code>false</code> |
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350 | * otherwise |
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351 | */ |
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352 | protected static boolean parseBoolean(String value) { |
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353 | if (value != null) { |
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354 | return value.equals("1") || Boolean.parseBoolean(value); |
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355 | } |
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356 | return false; |
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357 | } |
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358 | |
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359 | |
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360 | private long parseLong(String value, long defaultValue) throws SRUConfigException { |
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361 | if (value != null) { |
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362 | try { |
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363 | return Long.parseLong(value); |
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364 | } catch (NumberFormatException e) { |
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365 | throw new SRUConfigException("invalid long value"); |
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366 | } |
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367 | } |
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368 | return defaultValue; |
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369 | } |
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370 | |
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371 | |
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372 | private void writeEndpointDescription(XMLStreamWriter writer) |
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373 | throws XMLStreamException { |
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374 | writer.setPrefix(ED_PREFIX, ED_NS); |
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375 | writer.writeStartElement(ED_NS, "EndpointDescription"); |
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376 | writer.writeNamespace(ED_PREFIX, ED_NS); |
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377 | writer.writeAttribute("version", |
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378 | Integer.toString(endpointDescription.getVersion())); |
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379 | |
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380 | // Capabilities |
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381 | writer.writeStartElement(ED_NS, "Capabilities"); |
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382 | for (URI capability : endpointDescription.getCapabilities()) { |
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383 | writer.writeStartElement(ED_NS, "Capability"); |
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384 | writer.writeCharacters(capability.toString()); |
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385 | writer.writeEndElement(); // "Capability" element |
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386 | } |
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387 | writer.writeEndElement(); // "Capabilities" element |
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388 | |
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389 | // SupportedDataViews |
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390 | writer.writeStartElement(ED_NS, "SupportedDataViews"); |
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391 | for (DataView dataView : endpointDescription.getSupportedDataViews()) { |
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392 | writer.writeStartElement(ED_NS, "SupportedDataView"); |
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393 | writer.writeAttribute("id", dataView.getIdentifier()); |
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394 | String s; |
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395 | switch (dataView.getDeliveryPolicy()) { |
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396 | case SEND_BY_DEFAULT: |
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397 | s = "send-by-default"; |
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398 | break; |
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399 | case NEED_TO_REQUEST: |
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400 | s = "need-to-request"; |
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401 | break; |
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402 | default: |
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403 | throw new XMLStreamException( |
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404 | "invalid value for payload delivery policy: " + |
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405 | dataView.getDeliveryPolicy()); |
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406 | } // switch |
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407 | writer.writeAttribute("delivery-policy", s); |
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408 | writer.writeCharacters(dataView.getMimeType()); |
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409 | writer.writeEndElement(); // "SupportedDataView" element |
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410 | } |
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411 | writer.writeEndElement(); // "SupportedDataViews" element |
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412 | |
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413 | if (endpointDescription.isVersion(EndpointDescription.VERSION_2)) { |
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414 | // SupportedLayers |
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415 | final List<Layer> layers = endpointDescription.getSupportedLayers(); |
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416 | if (layers != null) { |
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417 | writer.writeStartElement(ED_NS, "SupportedLayers"); |
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418 | for (Layer layer : layers) { |
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419 | writer.writeStartElement(ED_NS, "SupportedLayer"); |
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420 | writer.writeAttribute("id", layer.getId()); |
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421 | writer.writeAttribute("result-id", |
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422 | layer.getResultId().toString()); |
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423 | if (layer.getContentEncoding() == |
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424 | Layer.ContentEncoding.EMPTY) { |
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425 | writer.writeAttribute("type", "empty"); |
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426 | } |
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427 | if (layer.getQualifier() != null) { |
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428 | writer.writeAttribute("qualifier", |
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429 | layer.getQualifier()); |
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430 | } |
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431 | if (layer.getAltValueInfo() != null) { |
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432 | writer.writeAttribute("alt-value-info", |
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433 | layer.getAltValueInfo()); |
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434 | if (layer.getAltValueInfoURI() != null) { |
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435 | writer.writeAttribute("alt-value-info-uri", |
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436 | layer.getAltValueInfoURI().toString()); |
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437 | } |
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438 | } |
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439 | writer.writeCharacters(layer.getType()); |
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440 | writer.writeEndElement(); // "SupportedLayer" element |
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441 | } |
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442 | writer.writeEndElement(); // "SupportedLayers" element |
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443 | } |
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444 | } |
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445 | |
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446 | // Resources |
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447 | try { |
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448 | List<ResourceInfo> resources = |
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449 | endpointDescription.getResourceList( |
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450 | EndpointDescription.PID_ROOT); |
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451 | writeResourceInfos(writer, resources); |
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452 | } catch (SRUException e) { |
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453 | throw new XMLStreamException( |
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454 | "error retriving top-level resources", e); |
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455 | } |
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456 | writer.writeEndElement(); // "EndpointDescription" element |
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457 | } |
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458 | |
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459 | |
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460 | private void writeResourceInfos(XMLStreamWriter writer, |
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461 | List<ResourceInfo> resources) throws XMLStreamException { |
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462 | if (resources == null) { |
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463 | throw new NullPointerException("resources == null"); |
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464 | } |
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465 | if (!resources.isEmpty()) { |
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466 | writer.writeStartElement(ED_NS, "Resources"); |
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467 | |
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468 | for (ResourceInfo resource : resources) { |
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469 | writer.writeStartElement(ED_NS, "Resource"); |
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470 | writer.writeAttribute("pid", resource.getPid()); |
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471 | |
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472 | // title |
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473 | final Map<String, String> title = resource.getTitle(); |
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474 | for (Map.Entry<String, String> i : title.entrySet()) { |
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475 | writer.setPrefix(XMLConstants.XML_NS_PREFIX, |
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476 | XMLConstants.XML_NS_URI); |
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477 | writer.writeStartElement(ED_NS, "Title"); |
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478 | writer.writeAttribute(XMLConstants.XML_NS_URI, "lang", i.getKey()); |
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479 | writer.writeCharacters(i.getValue()); |
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480 | writer.writeEndElement(); // "title" element |
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481 | } |
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482 | |
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483 | // description |
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484 | final Map<String, String> description = resource.getDescription(); |
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485 | if (description != null) { |
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486 | for (Map.Entry<String, String> i : description.entrySet()) { |
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487 | writer.writeStartElement(ED_NS, "Description"); |
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488 | writer.writeAttribute(XMLConstants.XML_NS_URI, "lang", |
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489 | i.getKey()); |
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490 | writer.writeCharacters(i.getValue()); |
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491 | writer.writeEndElement(); // "Description" element |
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492 | } |
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493 | } |
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494 | |
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495 | // landing page |
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496 | final String landingPageURI = resource.getLandingPageURI(); |
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497 | if (landingPageURI != null) { |
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498 | writer.writeStartElement(ED_NS, "LandingPageURI"); |
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499 | writer.writeCharacters(landingPageURI); |
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500 | writer.writeEndElement(); // "LandingPageURI" element |
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501 | } |
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502 | |
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503 | // languages |
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504 | final List<String> languages = resource.getLanguages(); |
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505 | writer.writeStartElement(ED_NS, "Languages"); |
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506 | for (String i : languages) { |
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507 | writer.writeStartElement(ED_NS, "Language"); |
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508 | writer.writeCharacters(i); |
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509 | writer.writeEndElement(); // "Language" element |
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510 | |
---|
511 | } |
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512 | writer.writeEndElement(); // "Languages" element |
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513 | |
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514 | // available data views |
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515 | StringBuilder sb = new StringBuilder(); |
---|
516 | for (DataView dataview : resource.getAvailableDataViews()) { |
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517 | if (sb.length() > 0) { |
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518 | sb.append(" "); |
---|
519 | } |
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520 | sb.append(dataview.getIdentifier()); |
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521 | } |
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522 | writer.writeEmptyElement(ED_NS, "AvailableDataViews"); |
---|
523 | writer.writeAttribute("ref", sb.toString()); |
---|
524 | |
---|
525 | if (endpointDescription.isVersion( |
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526 | EndpointDescription.VERSION_2)) { |
---|
527 | final List<Layer> layers = resource.getAvailableLayers(); |
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528 | if (layers != null) { |
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529 | sb = new StringBuilder(); |
---|
530 | for (Layer layer : resource.getAvailableLayers()) { |
---|
531 | if (sb.length() > 0) { |
---|
532 | sb.append(" "); |
---|
533 | } |
---|
534 | sb.append(layer.getId()); |
---|
535 | } |
---|
536 | writer.writeEmptyElement(ED_NS, "AvailableLayers"); |
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537 | writer.writeAttribute("ref", sb.toString()); |
---|
538 | } |
---|
539 | } |
---|
540 | |
---|
541 | // child resources |
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542 | List<ResourceInfo> subs = resource.getSubResources(); |
---|
543 | if ((subs != null) && !subs.isEmpty()) { |
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544 | writeResourceInfos(writer, subs); |
---|
545 | } |
---|
546 | |
---|
547 | writer.writeEndElement(); // "Resource" element |
---|
548 | } |
---|
549 | writer.writeEndElement(); // "Resources" element |
---|
550 | } |
---|
551 | } |
---|
552 | |
---|
553 | } // class SimpleEndpointSearchEngineBase |
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