1 | package eu.clarin.sru.server.fcs; |
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2 | |
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3 | import java.net.URI; |
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4 | import java.util.Collections; |
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5 | import java.util.List; |
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6 | import java.util.Map; |
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7 | |
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8 | import javax.servlet.ServletContext; |
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9 | import javax.xml.XMLConstants; |
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10 | import javax.xml.stream.XMLStreamException; |
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11 | import javax.xml.stream.XMLStreamWriter; |
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12 | |
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13 | import org.slf4j.Logger; |
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14 | import org.slf4j.LoggerFactory; |
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15 | import org.z3950.zing.cql.CQLNode; |
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16 | import org.z3950.zing.cql.CQLRelation; |
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17 | import org.z3950.zing.cql.CQLTermNode; |
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18 | import org.z3950.zing.cql.Modifier; |
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19 | |
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20 | import eu.clarin.sru.server.SRUConfigException; |
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21 | import eu.clarin.sru.server.SRUConstants; |
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22 | import eu.clarin.sru.server.SRUDiagnosticList; |
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23 | import eu.clarin.sru.server.SRUException; |
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24 | import eu.clarin.sru.server.SRUExplainResult; |
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25 | import eu.clarin.sru.server.SRURequest; |
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26 | import eu.clarin.sru.server.SRUScanResultSet; |
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27 | import eu.clarin.sru.server.SRUSearchEngine; |
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28 | import eu.clarin.sru.server.SRUServerConfig; |
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29 | import eu.clarin.sru.server.utils.SRUSearchEngineBase; |
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30 | |
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31 | |
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32 | /** |
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33 | * A base class for implementing a simple search engine to be used as a |
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34 | * CLARIN-FCS endpoint. |
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35 | * |
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36 | */ |
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37 | public abstract class SimpleEndpointSearchEngineBase extends |
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38 | SRUSearchEngineBase { |
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39 | private static final String X_FCS_ENDPOINT_DESCRIPTION = "x-fcs-endpoint-description"; |
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40 | private static final String X_CMD_RESOURCE_INFO = "x-cmd-resource-info"; |
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41 | private static final String ED_NS = "http://clarin.eu/fcs/endpoint-description"; |
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42 | private static final String ED_PREFIX = "ed"; |
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43 | private static final int ED_VERSION = 1; |
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44 | private static final String FCS_RESOURCE_INFO_NS = "http://clarin.eu/fcs/1.0/resource-info"; |
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45 | private static final String FCS_SCAN_INDEX_FCS_RESOURCE = "fcs.resource"; |
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46 | private static final String FCS_SCAN_INDEX_CQL_SERVERCHOICE = "cql.serverChoice"; |
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47 | private static final String FCS_SCAN_SUPPORTED_RELATION_CQL_1_1 = "scr"; |
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48 | private static final String FCS_SCAN_SUPPORTED_RELATION_CQL_1_2 = "="; |
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49 | private static final String FCS_SUPPORTED_RELATION_EXACT = "exact"; |
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50 | private static final Logger logger = |
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51 | LoggerFactory.getLogger(SimpleEndpointSearchEngineBase.class); |
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52 | protected EndpointDescription endpointDescription; |
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53 | |
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54 | |
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55 | /** |
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56 | * This method should not be overridden. Perform your custom initialization |
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57 | * in the {@link #doInit(ServletContext, SRUServerConfig, Map)} method |
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58 | * Instead. |
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59 | * |
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60 | * @see #doInit(ServletContext, SRUServerConfig, Map) |
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61 | */ |
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62 | @Override |
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63 | public final void init(ServletContext context, SRUServerConfig config, |
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64 | Map<String, String> params) throws SRUConfigException { |
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65 | logger.debug("initializing"); |
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66 | super.init(context, config, params); |
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67 | |
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68 | logger.debug("initializing search engine implementation"); |
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69 | doInit(context, config, params); |
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70 | |
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71 | logger.debug("initizalizing endpoint description"); |
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72 | this.endpointDescription = |
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73 | createEndpointDescription(context, config, params); |
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74 | if (this.endpointDescription == null) { |
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75 | logger.error("SimpleEndpointSearchEngineBase implementation " + |
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76 | "error: createEndpointDescription() returned null"); |
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77 | throw new SRUConfigException("createEndpointDescription() " + |
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78 | "returned no valid implementation of an EndpointDescription"); |
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79 | } |
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80 | } |
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81 | |
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82 | |
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83 | /** |
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84 | * This method should not be overridden. Perform you custom cleanup in the |
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85 | * {@link #doDestroy()} method. |
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86 | * |
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87 | * @see #doDestroy() |
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88 | */ |
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89 | @Override |
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90 | public final void destroy() { |
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91 | logger.debug("performing cleanup of endpoint description"); |
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92 | endpointDescription.destroy(); |
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93 | logger.debug("performing cleanup of search engine"); |
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94 | doDestroy(); |
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95 | super.destroy(); |
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96 | } |
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97 | |
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98 | |
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99 | @Override |
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100 | public final SRUExplainResult explain(SRUServerConfig config, |
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101 | SRURequest request, SRUDiagnosticList diagnostics) |
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102 | throws SRUException { |
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103 | |
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104 | final boolean provideEndpointDescription = |
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105 | parseBoolean(request.getExtraRequestData( |
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106 | X_FCS_ENDPOINT_DESCRIPTION)); |
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107 | |
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108 | if (provideEndpointDescription) { |
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109 | return new SRUExplainResult(diagnostics) { |
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110 | @Override |
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111 | public boolean hasExtraResponseData() { |
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112 | return provideEndpointDescription; |
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113 | } |
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114 | |
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115 | |
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116 | @Override |
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117 | public void writeExtraResponseData(XMLStreamWriter writer) |
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118 | throws XMLStreamException { |
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119 | writeEndpointDescription(writer); |
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120 | } |
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121 | }; |
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122 | } else { |
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123 | return null; |
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124 | } |
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125 | } |
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126 | |
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127 | |
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128 | /** |
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129 | * Handle a <em>scan</em> operation. This implementation provides support to |
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130 | * CLARIN FCS resource enumeration. If you want to provide custom scan |
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131 | * behavior for a different index, override the |
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132 | * {@link #doScan(SRUServerConfig, SRURequest, SRUDiagnosticList)} method. |
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133 | * |
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134 | * @see #doScan(SRUServerConfig, SRURequest, SRUDiagnosticList) |
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135 | */ |
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136 | @Override |
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137 | public final SRUScanResultSet scan(SRUServerConfig config, |
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138 | SRURequest request, SRUDiagnosticList diagnostics) |
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139 | throws SRUException { |
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140 | /* |
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141 | * Check if we got a scan on fcs.resource. If yes, handle it |
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142 | * accordingly, otherwise delegate to user-provided implementation. |
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143 | */ |
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144 | final List<ResourceInfo> result = |
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145 | translateFcsScanResource(request.getScanClause()); |
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146 | if (result != null) { |
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147 | /* |
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148 | * Make sure, we honor the maximumTerms limit, of the client |
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149 | * requests it ... |
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150 | */ |
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151 | final int maxTerms |
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152 | = ((result.size() > 0) && (request.getMaximumTerms() > 0)) |
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153 | ? Math.min(result.size(), request.getMaximumTerms()) |
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154 | : result.size(); |
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155 | |
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156 | /* |
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157 | * Shall we provide extended resource information ... ? |
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158 | */ |
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159 | final boolean provideResourceInfo = parseBoolean( |
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160 | request.getExtraRequestData(X_CMD_RESOURCE_INFO)); |
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161 | |
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162 | return new SRUScanResultSet(diagnostics) { |
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163 | private int idx = -1; |
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164 | |
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165 | @Override |
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166 | public boolean nextTerm() { |
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167 | return (result != null) && (++idx < maxTerms); |
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168 | } |
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169 | |
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170 | |
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171 | @Override |
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172 | public String getValue() { |
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173 | return result.get(idx).getPid(); |
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174 | } |
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175 | |
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176 | |
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177 | @Override |
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178 | public int getNumberOfRecords() { |
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179 | return -1; |
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180 | } |
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181 | |
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182 | |
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183 | @Override |
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184 | public String getDisplayTerm() { |
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185 | return result.get(idx).getTitle("en"); |
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186 | } |
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187 | |
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188 | |
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189 | @Override |
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190 | public WhereInList getWhereInList() { |
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191 | return null; |
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192 | } |
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193 | |
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194 | |
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195 | @Override |
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196 | public boolean hasExtraTermData() { |
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197 | return provideResourceInfo; |
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198 | } |
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199 | |
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200 | |
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201 | @Override |
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202 | public void writeExtraTermData(XMLStreamWriter writer) |
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203 | throws XMLStreamException { |
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204 | if (provideResourceInfo) { |
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205 | writeLegacyResourceInfo(writer, result.get(idx)); |
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206 | } |
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207 | } |
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208 | }; |
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209 | } else { |
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210 | return doScan(config, request, diagnostics); |
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211 | } |
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212 | } |
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213 | |
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214 | |
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215 | protected abstract EndpointDescription createEndpointDescription( |
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216 | ServletContext context, SRUServerConfig config, |
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217 | Map<String, String> params) throws SRUConfigException; |
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218 | |
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219 | |
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220 | /** |
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221 | * Initialize the search engine. This initialization should be tailed |
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222 | * towards your environment and needs. |
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223 | * |
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224 | * @param context |
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225 | * the {@link ServletContext} for the Servlet |
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226 | * @param config |
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227 | * the {@link SRUServerConfig} object for this search engine |
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228 | * @param params |
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229 | * additional parameters gathered from the Servlet configuration |
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230 | * and Servlet context. |
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231 | * @throws SRUConfigException |
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232 | * if an error occurred |
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233 | */ |
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234 | protected abstract void doInit(ServletContext context, |
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235 | SRUServerConfig config, Map<String, String> params) |
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236 | throws SRUConfigException; |
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237 | |
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238 | |
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239 | /** |
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240 | * Destroy the search engine. Override this method for any cleanup the |
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241 | * search engine needs to perform upon termination. |
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242 | */ |
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243 | protected void doDestroy() { |
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244 | } |
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245 | |
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246 | |
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247 | /** |
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248 | * Handle a <em>explain</em> operation. The default implementation is a |
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249 | * no-op. Override this method, if you want to provide a custom behavior. |
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250 | * |
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251 | * @see SRUSearchEngine#explain(SRUServerConfig, SRURequest, |
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252 | * SRUDiagnosticList) |
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253 | */ |
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254 | protected SRUScanResultSet doScan(SRUServerConfig config, |
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255 | SRURequest request, SRUDiagnosticList diagnostics) |
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256 | throws SRUException { |
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257 | final CQLNode scanClause = request.getScanClause(); |
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258 | if (scanClause instanceof CQLTermNode) { |
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259 | final CQLTermNode root = (CQLTermNode) scanClause; |
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260 | final String index = root.getIndex(); |
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261 | throw new SRUException(SRUConstants.SRU_UNSUPPORTED_INDEX, index, |
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262 | "scan operation on index '" + index + "' is not supported"); |
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263 | } else { |
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264 | throw new SRUException(SRUConstants.SRU_QUERY_FEATURE_UNSUPPORTED, |
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265 | "Scan clause too complex."); |
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266 | } |
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267 | } |
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268 | |
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269 | |
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270 | /** |
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271 | * Convince method for parsing a string to boolean. Values <code>1</code>, |
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272 | * <code>true</code>, <code>yes</code> yield a <em>true</em> boolean value |
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273 | * as a result, all others (including <code>null</code>) a <em>false</em> |
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274 | * boolean value. |
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275 | * |
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276 | * @param value |
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277 | * the string to parse |
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278 | * @return <code>true</code> if the supplied string was considered something |
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279 | * representing a <em>true</em> boolean value, <code>false</code> |
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280 | * otherwise |
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281 | */ |
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282 | protected static boolean parseBoolean(String value) { |
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283 | if (value != null) { |
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284 | return value.equals("1") || Boolean.parseBoolean(value); |
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285 | } |
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286 | return false; |
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287 | } |
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288 | |
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289 | |
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290 | private List<ResourceInfo> translateFcsScanResource(CQLNode scanClause) |
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291 | throws SRUException { |
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292 | if (scanClause instanceof CQLTermNode) { |
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293 | final CQLTermNode root = (CQLTermNode) scanClause; |
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294 | logger.debug("index = '{}', relation = '{}', term = '{}'", |
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295 | new Object[] { root.getIndex(), |
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296 | root.getRelation().getBase(), root.getTerm() }); |
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297 | |
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298 | String index = root.getIndex(); |
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299 | if (FCS_SCAN_INDEX_CQL_SERVERCHOICE.equals(index) && |
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300 | FCS_SCAN_INDEX_FCS_RESOURCE.equals(root.getTerm())) { |
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301 | throw new SRUException(SRUConstants.SRU_UNSUPPORTED_INDEX, |
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302 | "scan operation with 'scanClause' with value " + |
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303 | "'fcs.resource' is deprecated within CLARIN-FCS"); |
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304 | } |
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305 | if (!(FCS_SCAN_INDEX_FCS_RESOURCE.equals(index))) { |
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306 | logger.debug("got scan operation on index '{}', bailing ...", |
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307 | index); |
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308 | return null; |
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309 | } |
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310 | |
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311 | logger.warn("scan on 'fcs.resource' for endpoint resource " + |
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312 | "enumeration is deprecated."); |
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313 | |
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314 | // only allow "=" relation without any modifiers |
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315 | final CQLRelation relationNode = root.getRelation(); |
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316 | String relation = relationNode.getBase(); |
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317 | if (!(FCS_SCAN_SUPPORTED_RELATION_CQL_1_1.equals(relation) || |
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318 | FCS_SCAN_SUPPORTED_RELATION_CQL_1_2.equals(relation) || |
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319 | FCS_SUPPORTED_RELATION_EXACT.equals(relation))) { |
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320 | throw new SRUException(SRUConstants.SRU_UNSUPPORTED_RELATION, |
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321 | relationNode.getBase(), "Relation \"" + |
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322 | relationNode.getBase() + |
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323 | "\" is not supported in scan operation."); |
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324 | } |
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325 | final List<Modifier> modifiers = relationNode.getModifiers(); |
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326 | if ((modifiers != null) && !modifiers.isEmpty()) { |
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327 | Modifier modifier = modifiers.get(0); |
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328 | throw new SRUException( |
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329 | SRUConstants.SRU_UNSUPPORTED_RELATION_MODIFIER, |
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330 | modifier.getValue(), "Relation modifier \"" + |
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331 | modifier.getValue() + |
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332 | "\" is not supported in scan operation."); |
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333 | } |
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334 | |
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335 | final String term = root.getTerm(); |
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336 | if ((term == null) || term.isEmpty()) { |
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337 | throw new SRUException(SRUConstants.SRU_EMPTY_TERM_UNSUPPORTED, |
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338 | "An empty term is not supported in scan operation."); |
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339 | } |
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340 | |
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341 | /* |
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342 | * generate result: currently we only have a flat hierarchy, so |
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343 | * return an empty result on any attempt to do a recursive scan ... |
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344 | */ |
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345 | List<ResourceInfo> results = null; |
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346 | if ((FCS_SCAN_INDEX_CQL_SERVERCHOICE.equals(index) && |
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347 | FCS_SCAN_INDEX_FCS_RESOURCE.equals(term)) || |
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348 | (FCS_SCAN_INDEX_FCS_RESOURCE.equals(index))) { |
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349 | results = endpointDescription.getResourceList(term); |
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350 | } |
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351 | if ((results == null) || results.isEmpty()) { |
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352 | return Collections.emptyList(); |
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353 | } else { |
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354 | return results; |
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355 | } |
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356 | } else { |
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357 | throw new SRUException(SRUConstants.SRU_QUERY_FEATURE_UNSUPPORTED, |
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358 | "Scan clause too complex."); |
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359 | } |
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360 | } |
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361 | |
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362 | |
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363 | private void writeEndpointDescription(XMLStreamWriter writer) |
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364 | throws XMLStreamException { |
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365 | writer.setPrefix(ED_PREFIX, ED_NS); |
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366 | writer.writeStartElement(ED_NS, "EndpointDescription"); |
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367 | writer.writeNamespace(ED_PREFIX, ED_NS); |
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368 | writer.writeAttribute("version", Integer.toString(ED_VERSION)); |
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369 | |
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370 | // capabilities |
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371 | writer.writeStartElement(ED_NS, "Capabilities"); |
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372 | for (URI capability : endpointDescription.getCapabilities()) { |
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373 | writer.writeStartElement(ED_NS, "Capability"); |
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374 | writer.writeCharacters(capability.toString()); |
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375 | writer.writeEndElement(); // "Capability" element |
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376 | } |
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377 | writer.writeEndElement(); // "Capabilities" element |
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378 | |
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379 | // supported data views |
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380 | writer.writeStartElement(ED_NS, "SupportedDataViews"); |
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381 | for (DataView dataView : endpointDescription.getSupportedDataViews()) { |
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382 | writer.writeStartElement(ED_NS, "SupportedDataView"); |
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383 | writer.writeAttribute("id", dataView.getIdentifier()); |
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384 | String s; |
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385 | switch (dataView.getDeliveryPolicy()) { |
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386 | case SEND_BY_DEFAULT: |
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387 | s = "send-by-default"; |
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388 | break; |
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389 | case NEED_TO_REQUEST: |
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390 | s = "need-to-request"; |
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391 | break; |
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392 | default: |
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393 | throw new XMLStreamException( |
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394 | "invalid value for payload delivery policy: " + |
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395 | dataView.getDeliveryPolicy()); |
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396 | } // switch |
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397 | writer.writeAttribute("delivery-policy", s); |
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398 | writer.writeCharacters(dataView.getMimeType()); |
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399 | writer.writeEndElement(); // "SupportedDataView" element |
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400 | } |
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401 | writer.writeEndElement(); // "SupportedDataViews" element |
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402 | |
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403 | try { |
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404 | // resources |
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405 | List<ResourceInfo> resources = |
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406 | endpointDescription.getResourceList( |
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407 | EndpointDescription.PID_ROOT); |
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408 | writeResourceInfos(writer, resources); |
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409 | } catch (SRUException e) { |
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410 | throw new XMLStreamException("error retriving top-level resources", |
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411 | e); |
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412 | } |
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413 | writer.writeEndElement(); // "EndpointDescription" element |
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414 | } |
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415 | |
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416 | |
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417 | private void writeResourceInfos(XMLStreamWriter writer, |
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418 | List<ResourceInfo> resources) throws XMLStreamException { |
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419 | if (resources == null) { |
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420 | throw new NullPointerException("resources == null"); |
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421 | } |
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422 | if (!resources.isEmpty()) { |
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423 | writer.writeStartElement(ED_NS, "Resources"); |
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424 | |
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425 | for (ResourceInfo resource : resources) { |
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426 | writer.writeStartElement(ED_NS, "Resource"); |
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427 | writer.writeAttribute("pid", resource.getPid()); |
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428 | |
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429 | // title |
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430 | final Map<String, String> title = resource.getTitle(); |
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431 | for (Map.Entry<String, String> i : title.entrySet()) { |
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432 | writer.setPrefix(XMLConstants.XML_NS_PREFIX, |
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433 | XMLConstants.XML_NS_URI); |
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434 | writer.writeStartElement(ED_NS, "Title"); |
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435 | writer.writeAttribute(XMLConstants.XML_NS_URI, "lang", i.getKey()); |
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436 | writer.writeCharacters(i.getValue()); |
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437 | writer.writeEndElement(); // "title" element |
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438 | } |
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439 | |
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440 | // description |
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441 | final Map<String, String> description = resource.getDescription(); |
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442 | if (description != null) { |
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443 | for (Map.Entry<String, String> i : description.entrySet()) { |
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444 | writer.writeStartElement(ED_NS, "Description"); |
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445 | writer.writeAttribute(XMLConstants.XML_NS_URI, "lang", |
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446 | i.getKey()); |
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447 | writer.writeCharacters(i.getValue()); |
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448 | writer.writeEndElement(); // "Description" element |
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449 | } |
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450 | } |
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451 | |
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452 | // landing page |
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453 | final String landingPageURI = resource.getLandingPageURI(); |
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454 | if (landingPageURI != null) { |
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455 | writer.writeStartElement(ED_NS, "LandingPageURI"); |
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456 | writer.writeCharacters(landingPageURI); |
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457 | writer.writeEndElement(); // "LandingPageURI" element |
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458 | } |
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459 | |
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460 | // languages |
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461 | final List<String> languages = resource.getLanguages(); |
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462 | writer.writeStartElement(ED_NS, "Languages"); |
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463 | for (String i : languages) { |
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464 | writer.writeStartElement(ED_NS, "Language"); |
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465 | writer.writeCharacters(i); |
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466 | writer.writeEndElement(); // "Language" element |
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467 | |
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468 | } |
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469 | writer.writeEndElement(); // "Languages" element |
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470 | |
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471 | // available data views |
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472 | StringBuilder sb = new StringBuilder(); |
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473 | for (DataView dataview : resource.getAvailableDataViews()) { |
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474 | if (sb.length() > 0) { |
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475 | sb.append(" "); |
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476 | } |
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477 | sb.append(dataview.getIdentifier()); |
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478 | } |
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479 | writer.writeEmptyElement(ED_NS, "AvailableDataViews"); |
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480 | writer.writeAttribute("ref", sb.toString()); |
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481 | |
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482 | // child resources |
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483 | List<ResourceInfo> subs = resource.getSubResources(); |
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484 | if ((subs != null) && !subs.isEmpty()) { |
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485 | writeResourceInfos(writer, subs); |
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486 | } |
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487 | |
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488 | writer.writeEndElement(); // "Resource" element |
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489 | } |
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490 | writer.writeEndElement(); // "Resources" element |
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491 | } |
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492 | } |
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493 | |
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494 | |
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495 | private void writeLegacyResourceInfo(XMLStreamWriter writer, |
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496 | ResourceInfo resourceInfo) throws XMLStreamException { |
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497 | writer.setDefaultNamespace(FCS_RESOURCE_INFO_NS); |
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498 | writer.writeStartElement(FCS_RESOURCE_INFO_NS, "ResourceInfo"); |
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499 | writer.writeDefaultNamespace(FCS_RESOURCE_INFO_NS); |
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500 | |
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501 | // title |
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502 | final Map<String, String> title = resourceInfo.getTitle(); |
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503 | for (Map.Entry<String, String> i : title.entrySet()) { |
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504 | writer.setPrefix(XMLConstants.XML_NS_PREFIX, |
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505 | XMLConstants.XML_NS_URI); |
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506 | writer.writeStartElement(FCS_RESOURCE_INFO_NS, "Title"); |
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507 | writer.writeAttribute(XMLConstants.XML_NS_URI, "lang", i.getKey()); |
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508 | writer.writeCharacters(i.getValue()); |
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509 | writer.writeEndElement(); // "title" element |
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510 | } |
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511 | |
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512 | // description |
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513 | final Map<String, String> description = resourceInfo.getDescription(); |
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514 | if (description != null) { |
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515 | for (Map.Entry<String, String> i : description.entrySet()) { |
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516 | writer.writeStartElement(FCS_RESOURCE_INFO_NS, "Description"); |
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517 | writer.writeAttribute(XMLConstants.XML_NS_URI, "lang", |
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518 | i.getKey()); |
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519 | writer.writeCharacters(i.getValue()); |
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520 | writer.writeEndElement(); // "Description" element |
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521 | } |
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522 | } |
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523 | |
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524 | // landing page |
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525 | final String landingPageURI = resourceInfo.getLandingPageURI(); |
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526 | if (landingPageURI != null) { |
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527 | writer.writeStartElement(FCS_RESOURCE_INFO_NS, "LandingPageURI"); |
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528 | writer.writeCharacters(landingPageURI); |
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529 | writer.writeEndElement(); // "LandingPageURI" element |
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530 | } |
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531 | |
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532 | // languages |
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533 | final List<String> languages = resourceInfo.getLanguages(); |
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534 | writer.writeStartElement(FCS_RESOURCE_INFO_NS, "Languages"); |
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535 | for (String i : languages) { |
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536 | writer.writeStartElement(FCS_RESOURCE_INFO_NS, "Language"); |
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537 | writer.writeCharacters(i); |
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538 | writer.writeEndElement(); // "Language" element |
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539 | |
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540 | } |
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541 | writer.writeEndElement(); // "Languages" element |
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542 | writer.writeEndElement(); // "ResourceInfo" element |
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543 | } |
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544 | |
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545 | |
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546 | // final boolean defaultNS = ((prefix == null) || prefix.isEmpty()); |
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547 | // if (writeNS) { |
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548 | // if (defaultNS) { |
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549 | // writer.setDefaultNamespace(FCS_RESOURCE_INFO_NS); |
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550 | // } else { |
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551 | // writer.setPrefix(prefix, FCS_RESOURCE_INFO_NS); |
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552 | // } |
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553 | // } |
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554 | // writer.writeStartElement(FCS_RESOURCE_INFO_NS, "ResourceInfo"); |
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555 | // if (writeNS) { |
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556 | // if (defaultNS) { |
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557 | // writer.writeDefaultNamespace(FCS_RESOURCE_INFO_NS); |
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558 | // } else { |
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559 | // writer.writeNamespace(prefix, FCS_RESOURCE_INFO_NS); |
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560 | // } |
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561 | // } ) |
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562 | //} |
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563 | |
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564 | // public static void XwriteResourceInfo(XMLStreamWriter writer, String prefix, |
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565 | // ResourceInfo resourceInfo) throws XMLStreamException { |
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566 | // doWriteResourceInfo(writer, prefix, resourceInfo, true, false); |
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567 | // } |
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568 | // |
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569 | // |
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570 | // private static void XdoWriteResourceInfo(XMLStreamWriter writer, |
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571 | // String prefix, ResourceInfo resourceInfo, boolean writeNS, |
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572 | // boolean recursive) throws XMLStreamException { |
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573 | // |
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574 | // if (writer == null) { |
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575 | // throw new NullPointerException("writer == null"); |
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576 | // } |
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577 | // if (resourceInfo == null) { |
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578 | // throw new NullPointerException("resourceInfo == null"); |
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579 | // } |
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580 | // |
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581 | // final boolean defaultNS = ((prefix == null) || prefix.isEmpty()); |
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582 | // if (writeNS) { |
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583 | // if (defaultNS) { |
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584 | // writer.setDefaultNamespace(FCS_RESOURCE_INFO_NS); |
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585 | // } else { |
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586 | // writer.setPrefix(prefix, FCS_RESOURCE_INFO_NS); |
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587 | // } |
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588 | // } |
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589 | // writer.writeStartElement(FCS_RESOURCE_INFO_NS, "Resource"); |
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590 | // if (writeNS) { |
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591 | // if (defaultNS) { |
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592 | // writer.writeDefaultNamespace(FCS_RESOURCE_INFO_NS); |
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593 | // } else { |
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594 | // writer.writeNamespace(prefix, FCS_RESOURCE_INFO_NS); |
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595 | // } |
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596 | // } |
---|
597 | // if (recursive) { |
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598 | // /* |
---|
599 | // * HACK: only output @pid for recursive (= explain) requests. |
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600 | // * This should be revisited, if we decide to go for the explain |
---|
601 | // * style enumeration of resources. |
---|
602 | // */ |
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603 | // writer.writeAttribute("pid", resourceInfo.getPid()); |
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604 | // } |
---|
605 | // if (resourceInfo.hasSubResources()) { |
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606 | // writer.writeAttribute("hasSubResources", "true"); |
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607 | // } |
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608 | // |
---|
609 | // |
---|
610 | // if (recursive && resourceInfo.hasSubResources()) { |
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611 | // writer.writeStartElement(FCS_RESOURCE_INFO_NS, |
---|
612 | // "ResourceInfoCollection"); |
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613 | // for (ResourceInfo r : resourceInfo.getSubResources()) { |
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614 | // doWriteResourceInfo(writer, prefix, r, writeNS, recursive); |
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615 | // } |
---|
616 | // writer.writeEndElement(); // "ResourceCollection" element |
---|
617 | // } |
---|
618 | // writer.writeEndElement(); // "ResourceInfo" element |
---|
619 | // } |
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620 | |
---|
621 | } // class SimpleEndpointSearchEngineBase |
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