1 | /** |
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2 | * This software is copyright (c) 2011-2013 by |
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3 | * - 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 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; |
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18 | |
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19 | import java.io.IOException; |
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20 | import java.util.ArrayList; |
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21 | import java.util.Collections; |
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22 | import java.util.Enumeration; |
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23 | import java.util.HashMap; |
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24 | import java.util.List; |
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25 | import java.util.Map; |
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26 | |
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27 | import javax.servlet.http.HttpServletRequest; |
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28 | |
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29 | import org.slf4j.Logger; |
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30 | import org.slf4j.LoggerFactory; |
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31 | import org.z3950.zing.cql.CQLNode; |
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32 | import org.z3950.zing.cql.CQLParseException; |
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33 | import org.z3950.zing.cql.CQLParser; |
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34 | |
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35 | |
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36 | final class SRURequestImpl implements SRURequest, SRUDiagnosticList { |
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37 | private static final Logger logger = |
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38 | LoggerFactory.getLogger(SRURequest.class); |
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39 | /* general / explain related parameter names */ |
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40 | private static final String PARAM_OPERATION = "operation"; |
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41 | private static final String PARAM_VERSION = "version"; |
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42 | private static final String PARAM_STYLESHEET = "stylesheet"; |
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43 | private static final String PARAM_RENDER_BY = "renderedBy"; |
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44 | private static final String PARAM_HTTP_ACCEPT = "httpAccept"; |
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45 | private static final String PARAM_RESPONSE_TYPE = "responseType"; |
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46 | /* searchRetrieve related parameter names */ |
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47 | private static final String PARAM_QUERY = "query"; |
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48 | private static final String PARAM_QUERY_TYPE = "queryType"; |
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49 | private static final String PARAM_START_RECORD = "startRecord"; |
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50 | private static final String PARAM_MAXIMUM_RECORDS = "maximumRecords"; |
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51 | private static final String PARAM_RECORD_XML_ESCAPING = "recordXMLEscaping"; |
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52 | private static final String PARAM_RECORD_PACKING = "recordPacking"; |
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53 | private static final String PARAM_RECORD_SCHEMA = "recordSchema"; |
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54 | private static final String PARAM_RECORD_X_PATH = "recordXPath"; |
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55 | private static final String PARAM_RESULT_SET_TTL = "resultSetTTL"; |
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56 | private static final String PARAM_SORT_KEYS = "sortKeys"; |
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57 | /* scan related parameter names */ |
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58 | private static final String PARAM_SCAN_CLAUSE = "scanClause"; |
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59 | private static final String PARAM_RESPONSE_POSITION = "responsePosition"; |
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60 | private static final String PARAM_MAXIMUM_TERMS = "maximumTerms"; |
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61 | /* operations */ |
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62 | private static final String OP_EXPLAIN = "explain"; |
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63 | private static final String OP_SCAN = "scan"; |
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64 | private static final String OP_SEARCH_RETRIEVE = "searchRetrieve"; |
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65 | private static final String VERSION_1_1 = "1.1"; |
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66 | private static final String VERSION_1_2 = "1.2"; |
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67 | /* various parameter values */ |
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68 | private static final String RECORD_XML_ESCAPING_XML = "xml"; |
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69 | private static final String RECORD_XML_ESCPAING_STRING = "string"; |
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70 | private static final String RECORD_PACKING_PACKED = "packed"; |
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71 | private static final String RECORD_PACKING_UNPACKED = "unpacked"; |
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72 | private static final String RENDER_BY_CLIENT = "client"; |
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73 | private static final String RENDER_BY_SERVER = "server"; |
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74 | private static final String PARAM_EXTENSION_PREFIX = "x-"; |
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75 | private static final String X_UNLIMITED_RESULTSET = "x-unlimited-resultset"; |
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76 | private static final String X_UNLIMITED_TERMLIST = "x-unlimited-termlist"; |
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77 | private static final String X_INDENT_RESPONSE = "x-indent-response"; |
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78 | private static final int DEFAULT_START_RECORD = 1; |
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79 | private static final int DEFAULT_RESPONSE_POSITION = 1; |
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80 | private final SRUServerConfig config; |
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81 | private final SRUQueryParserRegistry queryParsers; |
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82 | private final HttpServletRequest request; |
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83 | private List<SRUDiagnostic> diagnostics; |
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84 | private SRUOperation operation; |
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85 | private SRUVersion version; |
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86 | private SRURecordXmlEscaping recordXmlEscaping; |
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87 | private SRURecordPacking recordPacking; |
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88 | private SRUQuery<?> query; |
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89 | private int startRecord = DEFAULT_START_RECORD; |
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90 | private int maximumRecords = -1; |
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91 | private String recordSchemaIdentifier; |
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92 | private String stylesheet; |
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93 | private SRURenderBy renderBy; |
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94 | private String responseType; |
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95 | private String httpAccept; |
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96 | private String recordXPath; |
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97 | private int resultSetTTL = -1; |
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98 | private String sortKeys; |
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99 | private CQLNode scanClause; |
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100 | private int responsePosition = DEFAULT_RESPONSE_POSITION; |
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101 | private int maximumTerms = -1; |
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102 | |
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103 | private static enum Parameter { |
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104 | STYLESHEET, |
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105 | RENDER_BY, |
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106 | HTTP_ACCEPT, |
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107 | RESPONSE_TYPE, |
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108 | START_RECORD, |
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109 | MAXIMUM_RECORDS, |
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110 | RECORD_XML_ESCAPING, |
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111 | RECORD_PACKING, |
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112 | RECORD_SCHEMA, |
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113 | RECORD_XPATH, |
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114 | RESULT_SET_TTL, |
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115 | SORT_KEYS, |
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116 | SCAN_CLAUSE, |
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117 | RESPONSE_POSITION, |
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118 | MAXIMUM_TERMS, |
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119 | } |
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120 | |
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121 | private static final class ParameterInfo { |
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122 | private final Parameter parameter; |
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123 | private final SRUVersion min; |
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124 | private final SRUVersion max; |
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125 | private final boolean mandatory; |
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126 | |
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127 | private ParameterInfo(Parameter name, boolean mandatory, |
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128 | SRUVersion min, SRUVersion max) { |
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129 | this.parameter = name; |
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130 | this.mandatory = mandatory; |
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131 | this.min = min; |
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132 | this.max = max; |
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133 | } |
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134 | |
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135 | public Parameter getParameter() { |
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136 | return parameter; |
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137 | } |
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138 | |
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139 | public String getName(SRUVersion version) { |
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140 | switch (parameter) { |
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141 | case STYLESHEET: |
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142 | return PARAM_STYLESHEET; |
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143 | case RENDER_BY: |
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144 | return PARAM_RENDER_BY; |
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145 | case HTTP_ACCEPT: |
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146 | return PARAM_HTTP_ACCEPT; |
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147 | case RESPONSE_TYPE: |
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148 | return PARAM_RESPONSE_TYPE; |
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149 | case START_RECORD: |
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150 | return PARAM_START_RECORD; |
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151 | case MAXIMUM_RECORDS: |
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152 | return PARAM_MAXIMUM_RECORDS; |
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153 | case RECORD_XML_ESCAPING: |
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154 | /* |
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155 | * 'recordPacking' was renamed to 'recordXMLEscaping' in SRU |
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156 | * 2.0. For library API treat 'recordPacking' parameter as |
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157 | * 'recordPacking' for SRU 1.1 and SRU 1.2. |
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158 | */ |
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159 | if (version == SRUVersion.VERSION_2_0) { |
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160 | return PARAM_RECORD_XML_ESCAPING; |
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161 | } else { |
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162 | return PARAM_RECORD_PACKING; |
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163 | } |
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164 | case RECORD_PACKING: |
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165 | /* |
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166 | * 'recordPacking' only exists in SRU 2.0; the old variant is |
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167 | * handled by the case for RECORD_XML_ESCAPING |
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168 | */ |
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169 | if (version == SRUVersion.VERSION_2_0) { |
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170 | return PARAM_RECORD_PACKING; |
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171 | } else { |
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172 | return null; |
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173 | } |
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174 | case RECORD_SCHEMA: |
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175 | return PARAM_RECORD_SCHEMA; |
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176 | case RECORD_XPATH: |
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177 | return PARAM_RECORD_X_PATH; |
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178 | case RESULT_SET_TTL: |
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179 | return PARAM_RESULT_SET_TTL; |
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180 | case SORT_KEYS: |
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181 | return PARAM_SORT_KEYS; |
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182 | case SCAN_CLAUSE: |
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183 | return PARAM_SCAN_CLAUSE; |
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184 | case RESPONSE_POSITION: |
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185 | return PARAM_RESPONSE_POSITION; |
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186 | case MAXIMUM_TERMS: |
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187 | return PARAM_MAXIMUM_TERMS; |
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188 | default: |
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189 | throw new InternalError(); |
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190 | } // switch |
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191 | } |
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192 | |
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193 | public boolean getMandatory() { |
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194 | return mandatory; |
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195 | } |
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196 | |
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197 | public boolean isForVersion(SRUVersion version) { |
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198 | return (min.getVersionNumber() <= version.getVersionNumber()) && |
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199 | (version.getVersionNumber() <= max.getVersionNumber()); |
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200 | } |
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201 | } // class ParameterInfo |
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202 | |
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203 | private static final ParameterInfo[] PARAMETER_SET_EXPLAIN = { |
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204 | new ParameterInfo(Parameter.STYLESHEET, false, |
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205 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_1_2), |
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206 | new ParameterInfo(Parameter.RECORD_XML_ESCAPING, false, |
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207 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_1_2) |
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208 | }; |
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209 | private static final ParameterInfo[] PARAMETER_SET_SCAN = { |
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210 | new ParameterInfo(Parameter.STYLESHEET, false, |
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211 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0), |
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212 | new ParameterInfo(Parameter.HTTP_ACCEPT, false, |
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213 | SRUVersion.VERSION_2_0, SRUVersion.VERSION_2_0), |
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214 | new ParameterInfo(Parameter.SCAN_CLAUSE, true, |
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215 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0), |
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216 | new ParameterInfo(Parameter.RESPONSE_POSITION, false, |
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217 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0), |
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218 | new ParameterInfo(Parameter.MAXIMUM_TERMS, false, |
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219 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0) |
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220 | }; |
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221 | private static final ParameterInfo[] PARAMETER_SET_SEARCH_RETRIEVE = { |
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222 | new ParameterInfo(Parameter.STYLESHEET, false, |
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223 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_1_2), |
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224 | new ParameterInfo(Parameter.HTTP_ACCEPT, false, |
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225 | SRUVersion.VERSION_2_0, SRUVersion.VERSION_2_0), |
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226 | new ParameterInfo(Parameter.RENDER_BY, false, |
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227 | SRUVersion.VERSION_2_0, SRUVersion.VERSION_2_0), |
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228 | new ParameterInfo(Parameter.RESPONSE_TYPE, false, |
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229 | SRUVersion.VERSION_2_0, SRUVersion.VERSION_2_0), |
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230 | new ParameterInfo(Parameter.START_RECORD, false, |
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231 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0), |
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232 | new ParameterInfo(Parameter.MAXIMUM_RECORDS, false, |
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233 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0), |
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234 | new ParameterInfo(Parameter.RECORD_XML_ESCAPING, false, |
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235 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0), |
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236 | new ParameterInfo(Parameter.RECORD_PACKING, false, |
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237 | SRUVersion.VERSION_2_0, SRUVersion.VERSION_2_0), |
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238 | new ParameterInfo(Parameter.RECORD_SCHEMA, false, |
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239 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0), |
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240 | new ParameterInfo(Parameter.RESULT_SET_TTL, false, |
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241 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0), |
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242 | new ParameterInfo(Parameter.RECORD_XPATH, false, |
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243 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_1_2), |
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244 | new ParameterInfo(Parameter.SORT_KEYS, false, |
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245 | SRUVersion.VERSION_1_1, SRUVersion.VERSION_2_0), |
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246 | }; |
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247 | |
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248 | |
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249 | SRURequestImpl(SRUServerConfig config, |
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250 | SRUQueryParserRegistry queryParsers, |
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251 | HttpServletRequest request) { |
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252 | this.config = config; |
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253 | this.queryParsers = queryParsers; |
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254 | this.request = request; |
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255 | } |
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256 | |
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257 | |
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258 | /** |
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259 | * Validate incoming request parameters. |
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260 | * |
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261 | * @return <code>true</code> if successful, <code>false</code> if something |
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262 | * went wrong |
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263 | */ |
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264 | boolean checkParameters() { |
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265 | final SRUVersion minVersion = config.getMinVersion(); |
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266 | final SRUVersion maxVersion = config.getMaxVersion(); |
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267 | |
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268 | /* |
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269 | * generally assume, we will also allow processing of SRU 1.1 or 1.2 |
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270 | */ |
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271 | boolean processSruOld = true; |
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272 | |
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273 | /* |
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274 | * Heuristic to detect SRU version and operation ... |
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275 | */ |
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276 | SRUOperation operation = null; |
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277 | SRUVersion version = null; |
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278 | if (maxVersion.compareTo(SRUVersion.VERSION_2_0) >= 0) { |
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279 | if (getParameter(PARAM_VERSION, false, false) == null) { |
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280 | /* |
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281 | * Ok, we're committed to SRU 2.0 now, so don't allow processing |
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282 | * of SRU 1.1 and 1.2 ... |
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283 | */ |
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284 | processSruOld = false; |
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285 | |
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286 | logger.debug("handling request as SRU 2.0, because no '{}' " + |
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287 | "parameter was found in the request", PARAM_VERSION); |
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288 | if ((getParameter(PARAM_QUERY, false, false) != null) || |
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289 | (getParameter(PARAM_QUERY_TYPE, false, false) != null)) { |
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290 | logger.debug("found parameter '{}' or '{}' therefore " + |
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291 | "assuming '{}' operation", |
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292 | PARAM_QUERY, PARAM_QUERY_TYPE, |
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293 | SRUOperation.SEARCH_RETRIEVE); |
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294 | operation = SRUOperation.SEARCH_RETRIEVE; |
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295 | } else if (getParameter(PARAM_SCAN_CLAUSE, false, false) != null) { |
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296 | logger.debug("found parameter '{}' therefore " + |
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297 | "assuming '{}' operation", |
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298 | PARAM_SCAN_CLAUSE, SRUOperation.SCAN); |
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299 | operation = SRUOperation.SCAN; |
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300 | } else { |
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301 | logger.debug("no special parameter found therefore " + |
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302 | "assuming '{}' operation", |
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303 | SRUOperation.EXPLAIN); |
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304 | operation = SRUOperation.EXPLAIN; |
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305 | } |
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306 | |
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307 | /* record version ... */ |
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308 | version = SRUVersion.VERSION_2_0; |
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309 | |
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310 | /* do pedantic check for 'operation' parameter */ |
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311 | final String op = getParameter(PARAM_OPERATION, false, false); |
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312 | if (op != null) { |
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313 | /* |
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314 | * XXX: if operation is searchRetrive and the 'operation' |
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315 | * parameter is also searchRetrieve, should the server just |
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316 | * ignore it? |
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317 | */ |
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318 | if (!(operation == SRUOperation.SEARCH_RETRIEVE) && |
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319 | op.equals(OP_SEARCH_RETRIEVE)) { |
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320 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_PARAMETER, |
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321 | PARAM_OPERATION, "Parameter \"" + |
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322 | PARAM_OPERATION + |
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323 | "\" is not valid for SRU version 2.0"); |
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324 | } |
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325 | } |
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326 | } else { |
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327 | logger.debug("handling request as legacy SRU, because found " + |
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328 | "parameter '{}' in request", PARAM_VERSION); |
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329 | } |
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330 | } |
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331 | |
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332 | if (processSruOld) { |
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333 | // parse mandatory operation parameter |
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334 | final String op = getParameter(PARAM_OPERATION, false, false); |
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335 | if (op != null) { |
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336 | if (!op.isEmpty()) { |
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337 | if (op.equals(OP_EXPLAIN)) { |
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338 | operation = SRUOperation.EXPLAIN; |
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339 | } else if (op.equals(OP_SCAN)) { |
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340 | operation = SRUOperation.SCAN; |
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341 | } else if (op.equals(OP_SEARCH_RETRIEVE)) { |
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342 | operation = SRUOperation.SEARCH_RETRIEVE; |
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343 | } else { |
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344 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_OPERATION, |
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345 | null, "Operation \"" + op + "\" is not supported."); |
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346 | } |
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347 | } else { |
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348 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_OPERATION, |
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349 | null, "An empty parameter \"" + |
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350 | PARAM_OPERATION + |
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351 | "\" is not supported."); |
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352 | } |
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353 | |
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354 | // parse and check version |
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355 | version = parseAndCheckVersionParameter(operation); |
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356 | } else { |
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357 | /* |
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358 | * absent parameter should be interpreted as "explain" |
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359 | */ |
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360 | operation = SRUOperation.EXPLAIN; |
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361 | |
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362 | // parse and check version |
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363 | version = parseAndCheckVersionParameter(operation); |
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364 | } |
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365 | } |
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366 | |
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367 | |
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368 | /* |
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369 | * sanity check |
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370 | */ |
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371 | if ((version != null) && (operation != null)) { |
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372 | logger.debug("min = {}, min? = {}, max = {}, max? = {}, version = {}", |
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373 | minVersion, |
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374 | version.compareTo(minVersion), |
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375 | maxVersion, |
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376 | version.compareTo(maxVersion), |
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377 | version); |
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378 | if ((version.compareTo(minVersion) >= 0) && |
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379 | (version.compareTo(maxVersion) <= 0)) { |
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380 | /* |
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381 | * FIXME: re-factor to make this nicer ... |
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382 | */ |
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383 | this.version = version; |
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384 | this.operation = operation; |
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385 | return checkParameters2(); |
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386 | } else { |
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387 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_VERSION, |
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388 | maxVersion.getVersionString(), |
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389 | "Version \"" + version.getVersionString() + |
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390 | "\" is not supported by this endpoint."); |
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391 | } |
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392 | } |
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393 | logger.debug("bailed"); |
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394 | return false; |
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395 | } |
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396 | |
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397 | |
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398 | private boolean checkParameters2() { |
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399 | if (diagnostics == null) { |
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400 | // check mandatory/optional parameters for operation |
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401 | ParameterInfo[] parameter_set; |
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402 | switch (operation) { |
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403 | case EXPLAIN: |
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404 | parameter_set = PARAMETER_SET_EXPLAIN; |
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405 | break; |
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406 | case SCAN: |
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407 | parameter_set = PARAMETER_SET_SCAN; |
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408 | break; |
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409 | case SEARCH_RETRIEVE: |
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410 | parameter_set = PARAMETER_SET_SEARCH_RETRIEVE; |
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411 | break; |
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412 | default: |
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413 | /* actually cannot happen */ |
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414 | addDiagnostic(SRUConstants.SRU_GENERAL_SYSTEM_ERROR, null, |
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415 | "internal error (invalid operation)"); |
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416 | return false; |
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417 | } |
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418 | |
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419 | /* |
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420 | * keep list of all submitted parameters (except "operation" and |
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421 | * "version"), so we can later warn if an unsupported parameter |
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422 | * was sent (= not all parameters were consumed). |
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423 | */ |
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424 | List<String> parameterNames = getParameterNames(); |
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425 | |
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426 | // check parameters ... |
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427 | for (ParameterInfo parameter : parameter_set) { |
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428 | final String name = parameter.getName(version); |
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429 | if (name == null) { |
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430 | /* |
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431 | * this parameter is not supported in the SRU version that |
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432 | * was used for the request |
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433 | */ |
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434 | continue; |
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435 | } |
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436 | final String value = getParameter(name, true, true); |
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437 | if (value != null) { |
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438 | // remove supported parameter from list |
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439 | parameterNames.remove(name); |
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440 | |
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441 | /* |
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442 | * if parameter is not supported in this version, skip |
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443 | * it and create add an diagnostic. |
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444 | */ |
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445 | if (!parameter.isForVersion(version)) { |
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446 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_PARAMETER, |
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447 | name, |
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448 | "Version " + version.getVersionString() + |
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449 | " does not support parameter \"" + |
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450 | name + "\"."); |
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451 | continue; |
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452 | } |
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453 | |
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454 | // validate and parse parameters ... |
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455 | switch (parameter.getParameter()) { |
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456 | case RECORD_XML_ESCAPING: |
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457 | if (value.equals(RECORD_XML_ESCAPING_XML)) { |
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458 | recordXmlEscaping = SRURecordXmlEscaping.XML; |
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459 | } else if (value.equals(RECORD_XML_ESCPAING_STRING)) { |
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460 | recordXmlEscaping = SRURecordXmlEscaping.STRING; |
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461 | } else { |
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462 | addDiagnostic( |
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463 | SRUConstants.SRU_UNSUPPORTED_XML_ESCAPING_VALUE, |
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464 | null, "Record XML escaping \"" + value + |
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465 | "\" is not supported."); |
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466 | } |
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467 | break; |
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468 | case RECORD_PACKING: |
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469 | if (value.equals(RECORD_PACKING_PACKED)) { |
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470 | recordPacking = SRURecordPacking.PACKED; |
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471 | } else if (value.equals(RECORD_PACKING_UNPACKED)) { |
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472 | recordPacking = SRURecordPacking.UNPACKED; |
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473 | } else { |
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474 | addDiagnostic( |
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475 | SRUConstants.SRU_UNSUPPORTED_PARAMETER_VALUE, |
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476 | null, "Record packing \"" + value + |
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477 | "\" is not supported."); |
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478 | } |
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479 | break; |
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480 | case START_RECORD: |
---|
481 | startRecord = parseNumberedParameter(name, value, 1); |
---|
482 | break; |
---|
483 | case MAXIMUM_RECORDS: |
---|
484 | maximumRecords = parseNumberedParameter(name, value, 0); |
---|
485 | break; |
---|
486 | case RECORD_SCHEMA: |
---|
487 | /* |
---|
488 | * The parameter recordSchema may contain either schema |
---|
489 | * identifier or the short name. If available, set to |
---|
490 | * appropriate schema identifier in the request object. |
---|
491 | */ |
---|
492 | SRUServerConfig.SchemaInfo schemaInfo = |
---|
493 | config.findSchemaInfo(value); |
---|
494 | if (schemaInfo != null) { |
---|
495 | recordSchemaIdentifier = schemaInfo.getIdentifier(); |
---|
496 | } else { |
---|
497 | /* |
---|
498 | * SRU servers are supposed to raise a non-surrogate |
---|
499 | * (fatal) diagnostic in case the record schema is |
---|
500 | * not known to the server. |
---|
501 | */ |
---|
502 | addDiagnostic( |
---|
503 | SRUConstants.SRU_UNKNOWN_SCHEMA_FOR_RETRIEVAL, |
---|
504 | value, "Record schema \"" + value + |
---|
505 | "\" is not supported for retrieval."); |
---|
506 | } |
---|
507 | break; |
---|
508 | case RECORD_XPATH: |
---|
509 | recordXPath = value; |
---|
510 | break; |
---|
511 | case RESULT_SET_TTL: |
---|
512 | resultSetTTL = parseNumberedParameter(name, value, 0); |
---|
513 | break; |
---|
514 | case SORT_KEYS: |
---|
515 | sortKeys = value; |
---|
516 | break; |
---|
517 | case SCAN_CLAUSE: |
---|
518 | scanClause = parseScanQueryParameter(name, value); |
---|
519 | break; |
---|
520 | case RESPONSE_POSITION: |
---|
521 | responsePosition = parseNumberedParameter( |
---|
522 | name, value, 0); |
---|
523 | break; |
---|
524 | case MAXIMUM_TERMS: |
---|
525 | maximumTerms = parseNumberedParameter(name, value, 0); |
---|
526 | break; |
---|
527 | case STYLESHEET: |
---|
528 | stylesheet = value; |
---|
529 | break; |
---|
530 | case RENDER_BY: |
---|
531 | if (value.equals(RENDER_BY_CLIENT)) { |
---|
532 | renderBy = SRURenderBy.CLIENT; |
---|
533 | } else if (value.equals(RENDER_BY_SERVER)) { |
---|
534 | renderBy = SRURenderBy.SERVER; |
---|
535 | } else { |
---|
536 | addDiagnostic( |
---|
537 | SRUConstants.SRU_UNSUPPORTED_PARAMETER_VALUE, |
---|
538 | null, |
---|
539 | "Value \"" + value + "\" for parameter '" + |
---|
540 | name + "' is not supported."); |
---|
541 | } |
---|
542 | break; |
---|
543 | case RESPONSE_TYPE: |
---|
544 | /* |
---|
545 | * FIXME: check parameter validity?! |
---|
546 | */ |
---|
547 | responseType = value; |
---|
548 | break; |
---|
549 | case HTTP_ACCEPT: |
---|
550 | /* |
---|
551 | * FIXME: check parameter validity?! |
---|
552 | */ |
---|
553 | httpAccept = value; |
---|
554 | break; |
---|
555 | } // switch |
---|
556 | } else { |
---|
557 | if (parameter.getMandatory()) { |
---|
558 | addDiagnostic( |
---|
559 | SRUConstants.SRU_MANDATORY_PARAMETER_NOT_SUPPLIED, |
---|
560 | name, "Mandatory parameter \"" + name + |
---|
561 | "\" was not supplied."); |
---|
562 | } |
---|
563 | } |
---|
564 | } // for |
---|
565 | |
---|
566 | /* |
---|
567 | * handle query and queryType |
---|
568 | */ |
---|
569 | if (operation == SRUOperation.SEARCH_RETRIEVE) { |
---|
570 | /* |
---|
571 | * determine queryType |
---|
572 | */ |
---|
573 | String queryType = null; |
---|
574 | if (version == SRUVersion.VERSION_2_0) { |
---|
575 | parameterNames.remove(PARAM_QUERY_TYPE); |
---|
576 | String value = getParameter(PARAM_QUERY_TYPE, true, true); |
---|
577 | if (value == null) { |
---|
578 | queryType = SRUConstants.SRU_QUERY_TYPE_CQL; |
---|
579 | } else { |
---|
580 | boolean badCharacters = false; |
---|
581 | for (int i = 0; i < value.length(); i++) { |
---|
582 | final char ch = value.charAt(i); |
---|
583 | if (!((ch >= 'a' && ch <= 'z') || |
---|
584 | (ch >= 'A' && ch <= 'Z') || |
---|
585 | (ch >= '0' && ch <= '9') || |
---|
586 | ((i > 0) && ((ch == '-') || ch == '_')))) { |
---|
587 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_PARAMETER_VALUE, |
---|
588 | PARAM_QUERY_TYPE, "Value contains illegal characters."); |
---|
589 | badCharacters = true; |
---|
590 | break; |
---|
591 | } |
---|
592 | } |
---|
593 | if (!badCharacters) { |
---|
594 | queryType = value; |
---|
595 | } |
---|
596 | } |
---|
597 | } else { |
---|
598 | // SRU 1.1 and SRU 1.2 only support CQL |
---|
599 | queryType = SRUConstants.SRU_QUERY_TYPE_CQL; |
---|
600 | } |
---|
601 | |
---|
602 | |
---|
603 | if (queryType != null) { |
---|
604 | logger.debug("looking for query parser for query type '{}'", |
---|
605 | queryType); |
---|
606 | final SRUQueryParser<?> queryParser = |
---|
607 | queryParsers.findQueryParser(queryType); |
---|
608 | if (queryParser != null) { |
---|
609 | if (queryParser.supportsVersion(version)) { |
---|
610 | /* |
---|
611 | * gather query parameters (as required by |
---|
612 | * QueryParser implementation |
---|
613 | */ |
---|
614 | final Map<String, String> queryParameters = |
---|
615 | new HashMap<String, String>(); |
---|
616 | List<String> missingParameter = null; |
---|
617 | for (String name : queryParser.getQueryParameterNames()) { |
---|
618 | parameterNames.remove(name); |
---|
619 | final String value = |
---|
620 | getParameter(name, true, false); |
---|
621 | if (value != null) { |
---|
622 | queryParameters.put(name, value); |
---|
623 | } else { |
---|
624 | if (missingParameter == null) { |
---|
625 | missingParameter = new ArrayList<String>(); |
---|
626 | } |
---|
627 | missingParameter.add(name); |
---|
628 | } |
---|
629 | } |
---|
630 | |
---|
631 | if (missingParameter == null) { |
---|
632 | logger.debug("parsing query with parser for " + |
---|
633 | "type '{}' and parameters {}", |
---|
634 | queryParser.getQueryType(), |
---|
635 | queryParameters); |
---|
636 | query = queryParser.parseQuery(version, |
---|
637 | queryParameters, this); |
---|
638 | } else { |
---|
639 | logger.debug("parameters {} missing, cannot " + |
---|
640 | "parse query", missingParameter); |
---|
641 | for (String name : missingParameter) { |
---|
642 | addDiagnostic(SRUConstants.SRU_MANDATORY_PARAMETER_NOT_SUPPLIED, |
---|
643 | name, |
---|
644 | "Mandatory parameter '" + name + |
---|
645 | "' is missing or empty. " + |
---|
646 | "Required to perform query " + |
---|
647 | "of query type '" + |
---|
648 | queryType + "'."); |
---|
649 | } |
---|
650 | } |
---|
651 | } else { |
---|
652 | logger.debug("query parser for query type '{}' " + |
---|
653 | "is not supported by SRU version {}", |
---|
654 | queryType, version); |
---|
655 | addDiagnostic(SRUConstants.SRU_CANNOT_PROCESS_QUERY_REASON_UNKNOWN, null, |
---|
656 | "Query parser for query type '" + |
---|
657 | queryType + "' is nut supported " + |
---|
658 | "by SRU version '" + |
---|
659 | version.getVersionString() + "'."); |
---|
660 | } |
---|
661 | } else { |
---|
662 | logger.debug("no parser for query type '{}' found", queryType); |
---|
663 | addDiagnostic(SRUConstants.SRU_CANNOT_PROCESS_QUERY_REASON_UNKNOWN, null, |
---|
664 | "Cannot find query parser for query type '" + queryType + "'."); |
---|
665 | } |
---|
666 | } else { |
---|
667 | logger.debug("cannot determine query type"); |
---|
668 | addDiagnostic(SRUConstants.SRU_CANNOT_PROCESS_QUERY_REASON_UNKNOWN, null, |
---|
669 | "Cannot determine query type."); |
---|
670 | } |
---|
671 | } |
---|
672 | |
---|
673 | |
---|
674 | /* |
---|
675 | * check if any parameters where not consumed and |
---|
676 | * add appropriate warnings |
---|
677 | */ |
---|
678 | if (!parameterNames.isEmpty()) { |
---|
679 | for (String name : parameterNames) { |
---|
680 | // skip extraRequestData (aka extensions) |
---|
681 | if (!name.startsWith(PARAM_EXTENSION_PREFIX)) { |
---|
682 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_PARAMETER, |
---|
683 | name, "Parameter \"" + name + "\" is not " + |
---|
684 | "supported for this operation."); |
---|
685 | } |
---|
686 | } |
---|
687 | } |
---|
688 | } |
---|
689 | |
---|
690 | /* |
---|
691 | * diagnostics == null -> consider as success |
---|
692 | * FIXME: this should ne done nicer! |
---|
693 | */ |
---|
694 | return (diagnostics == null); |
---|
695 | } |
---|
696 | |
---|
697 | |
---|
698 | List<SRUDiagnostic> getDiagnostics() { |
---|
699 | return diagnostics; |
---|
700 | } |
---|
701 | |
---|
702 | |
---|
703 | SRUVersion getRawVersion() { |
---|
704 | return version; |
---|
705 | } |
---|
706 | |
---|
707 | |
---|
708 | SRURecordXmlEscaping getRawRecordPacking() { |
---|
709 | return recordXmlEscaping; |
---|
710 | } |
---|
711 | |
---|
712 | |
---|
713 | String getRawRecordSchemaIdentifier() { |
---|
714 | return getParameter(PARAM_RECORD_SCHEMA, true, false); |
---|
715 | } |
---|
716 | |
---|
717 | |
---|
718 | String getRawQuery() { |
---|
719 | return getParameter(PARAM_QUERY, true, false); |
---|
720 | } |
---|
721 | |
---|
722 | |
---|
723 | int getRawMaximumRecords() { |
---|
724 | return maximumRecords; |
---|
725 | } |
---|
726 | |
---|
727 | |
---|
728 | String getRawScanClause() { |
---|
729 | return getParameter(PARAM_SCAN_CLAUSE, true, false); |
---|
730 | } |
---|
731 | |
---|
732 | |
---|
733 | String getRawHttpAccept() { |
---|
734 | return getParameter(PARAM_HTTP_ACCEPT, true, false); |
---|
735 | } |
---|
736 | |
---|
737 | |
---|
738 | int getIndentResponse() { |
---|
739 | if (config.allowOverrideIndentResponse()) { |
---|
740 | String s = getExtraRequestData(X_INDENT_RESPONSE); |
---|
741 | if (s != null) { |
---|
742 | try { |
---|
743 | int x = Integer.parseInt(s); |
---|
744 | if ((x > -2) && (x < 9)) { |
---|
745 | return x; |
---|
746 | } |
---|
747 | } catch (NumberFormatException e) { |
---|
748 | /* IGNORE */ |
---|
749 | } |
---|
750 | } |
---|
751 | } |
---|
752 | return config.getIndentResponse(); |
---|
753 | } |
---|
754 | |
---|
755 | |
---|
756 | @Override |
---|
757 | public SRUOperation getOperation() { |
---|
758 | return operation; |
---|
759 | } |
---|
760 | |
---|
761 | |
---|
762 | @Override |
---|
763 | public SRUVersion getVersion() { |
---|
764 | return (version != null) ? version : config.getDefaultVersion(); |
---|
765 | } |
---|
766 | |
---|
767 | |
---|
768 | @Override |
---|
769 | public boolean isVersion(SRUVersion version) { |
---|
770 | if (version == null) { |
---|
771 | throw new NullPointerException("version == null"); |
---|
772 | } |
---|
773 | return getVersion().equals(version); |
---|
774 | } |
---|
775 | |
---|
776 | |
---|
777 | @Override |
---|
778 | public boolean isVersion(SRUVersion min, SRUVersion max) { |
---|
779 | if (min == null) { |
---|
780 | throw new NullPointerException("min == null"); |
---|
781 | } |
---|
782 | if (max == null) { |
---|
783 | throw new NullPointerException("max == null"); |
---|
784 | } |
---|
785 | if (min.getVersionNumber() > max.getVersionNumber()) { |
---|
786 | throw new IllegalArgumentException("min > max"); |
---|
787 | } |
---|
788 | final SRUVersion v = getVersion(); |
---|
789 | return (min.getVersionNumber() >= v.getVersionNumber()) && |
---|
790 | (v.getVersionNumber() <= max.getVersionNumber()); |
---|
791 | } |
---|
792 | |
---|
793 | |
---|
794 | @Override |
---|
795 | public SRURecordXmlEscaping getRecordXmlEscaping() { |
---|
796 | return (recordXmlEscaping != null) |
---|
797 | ? recordXmlEscaping |
---|
798 | : config.getDefaultRecordXmlEscaping(); |
---|
799 | } |
---|
800 | |
---|
801 | |
---|
802 | @Override |
---|
803 | public SRURecordPacking getRecordPacking() { |
---|
804 | return (recordPacking != null) |
---|
805 | ? recordPacking |
---|
806 | : config.getDefaultRecordPacking(); |
---|
807 | } |
---|
808 | |
---|
809 | |
---|
810 | @Override |
---|
811 | public SRUQuery<?> getQuery() { |
---|
812 | return query; |
---|
813 | } |
---|
814 | |
---|
815 | |
---|
816 | @Override |
---|
817 | public <T extends SRUQuery<?>> T getQuery(Class<T> type) { |
---|
818 | if (type == null) { |
---|
819 | throw new ClassCastException("type == null"); |
---|
820 | } |
---|
821 | // cast() is null-safe |
---|
822 | return type.cast(query); |
---|
823 | } |
---|
824 | |
---|
825 | |
---|
826 | @Override |
---|
827 | public boolean isQueryType(String queryType) { |
---|
828 | if ((queryType != null) && (query != null)) { |
---|
829 | return query.getQueryType().equals(queryType); |
---|
830 | } |
---|
831 | return false; |
---|
832 | } |
---|
833 | |
---|
834 | |
---|
835 | @Override |
---|
836 | public String getQueryType() { |
---|
837 | if (query != null) { |
---|
838 | return query.getQueryType(); |
---|
839 | } |
---|
840 | return null; |
---|
841 | } |
---|
842 | |
---|
843 | |
---|
844 | @Override |
---|
845 | public int getStartRecord() { |
---|
846 | return startRecord; |
---|
847 | } |
---|
848 | |
---|
849 | |
---|
850 | @Override |
---|
851 | public int getMaximumRecords() { |
---|
852 | if (config.allowOverrideMaximumRecords() && |
---|
853 | (getExtraRequestData(X_UNLIMITED_RESULTSET) != null)) { |
---|
854 | return -1; |
---|
855 | } |
---|
856 | if (maximumRecords == -1) { |
---|
857 | return config.getNumberOfRecords(); |
---|
858 | } else { |
---|
859 | if (maximumRecords > config.getMaximumRecords()) { |
---|
860 | return config.getMaximumRecords(); |
---|
861 | } else { |
---|
862 | return maximumRecords; |
---|
863 | } |
---|
864 | } |
---|
865 | } |
---|
866 | |
---|
867 | |
---|
868 | @Override |
---|
869 | public String getRecordSchemaIdentifier() { |
---|
870 | return recordSchemaIdentifier; |
---|
871 | } |
---|
872 | |
---|
873 | |
---|
874 | @Override |
---|
875 | public String getRecordXPath() { |
---|
876 | return recordXPath; |
---|
877 | } |
---|
878 | |
---|
879 | |
---|
880 | @Override |
---|
881 | public int getResultSetTTL() { |
---|
882 | return resultSetTTL; |
---|
883 | } |
---|
884 | |
---|
885 | |
---|
886 | @Override |
---|
887 | public String getSortKeys() { |
---|
888 | return sortKeys; |
---|
889 | } |
---|
890 | |
---|
891 | |
---|
892 | @Override |
---|
893 | public CQLNode getScanClause() { |
---|
894 | return scanClause; |
---|
895 | } |
---|
896 | |
---|
897 | |
---|
898 | @Override |
---|
899 | public int getResponsePosition() { |
---|
900 | return responsePosition; |
---|
901 | } |
---|
902 | |
---|
903 | |
---|
904 | @Override |
---|
905 | public int getMaximumTerms() { |
---|
906 | if (config.allowOverrideMaximumTerms() && |
---|
907 | (getExtraRequestData(X_UNLIMITED_TERMLIST) != null)) { |
---|
908 | return -1; |
---|
909 | } |
---|
910 | if (maximumTerms == -1) { |
---|
911 | return config.getNumberOfTerms(); |
---|
912 | } else { |
---|
913 | if (maximumTerms > config.getMaximumTerms()) { |
---|
914 | return config.getMaximumTerms(); |
---|
915 | } else { |
---|
916 | return maximumTerms; |
---|
917 | } |
---|
918 | } |
---|
919 | } |
---|
920 | |
---|
921 | |
---|
922 | @Override |
---|
923 | public String getStylesheet() { |
---|
924 | return stylesheet; |
---|
925 | } |
---|
926 | |
---|
927 | |
---|
928 | @Override |
---|
929 | public SRURenderBy getRenderBy() { |
---|
930 | return renderBy; |
---|
931 | } |
---|
932 | |
---|
933 | |
---|
934 | @Override |
---|
935 | public String getResponeType() { |
---|
936 | return responseType; |
---|
937 | } |
---|
938 | |
---|
939 | |
---|
940 | @Override |
---|
941 | public String getHttpAccept() { |
---|
942 | if (httpAccept != null) { |
---|
943 | return httpAccept; |
---|
944 | } else { |
---|
945 | return request.getHeader("ACCEPT"); |
---|
946 | } |
---|
947 | } |
---|
948 | |
---|
949 | |
---|
950 | @Override |
---|
951 | public String getProtocolScheme() { |
---|
952 | return request.isSecure() ? "https://" : "http://"; |
---|
953 | } |
---|
954 | |
---|
955 | |
---|
956 | @Override |
---|
957 | public List<String> getExtraRequestDataNames() { |
---|
958 | List<String> result = null; |
---|
959 | for (Enumeration<?> i = request.getParameterNames(); i.hasMoreElements(); ) { |
---|
960 | String name = (String) i.nextElement(); |
---|
961 | if (name.startsWith(PARAM_EXTENSION_PREFIX)) { |
---|
962 | if (result == null) { |
---|
963 | result = new ArrayList<String>(); |
---|
964 | } |
---|
965 | result.add(name); |
---|
966 | } |
---|
967 | } |
---|
968 | |
---|
969 | if (result != null) { |
---|
970 | return result; |
---|
971 | } else { |
---|
972 | return Collections.emptyList(); |
---|
973 | } |
---|
974 | } |
---|
975 | |
---|
976 | |
---|
977 | @Override |
---|
978 | public String getExtraRequestData(String name) { |
---|
979 | if (name == null) { |
---|
980 | throw new NullPointerException("name == null"); |
---|
981 | } |
---|
982 | if (!name.startsWith(PARAM_EXTENSION_PREFIX)) { |
---|
983 | throw new IllegalArgumentException( |
---|
984 | "name must start with \"" + PARAM_EXTENSION_PREFIX + "\""); |
---|
985 | } |
---|
986 | return request.getParameter(name); |
---|
987 | } |
---|
988 | |
---|
989 | |
---|
990 | @Override |
---|
991 | public HttpServletRequest getServletRequest() { |
---|
992 | return request; |
---|
993 | } |
---|
994 | |
---|
995 | |
---|
996 | @Override |
---|
997 | public void addDiagnostic(String uri, String details, String message) { |
---|
998 | final SRUDiagnostic diagnostic = |
---|
999 | new SRUDiagnostic(uri, details, message); |
---|
1000 | if (diagnostics == null) { |
---|
1001 | diagnostics = new ArrayList<SRUDiagnostic>(); |
---|
1002 | } |
---|
1003 | diagnostics.add(diagnostic); |
---|
1004 | } |
---|
1005 | |
---|
1006 | |
---|
1007 | private List<String> getParameterNames() { |
---|
1008 | List<String> list = new ArrayList<String>(); |
---|
1009 | for (Enumeration<?> i = request.getParameterNames(); |
---|
1010 | i.hasMoreElements();) { |
---|
1011 | String name = (String) i.nextElement(); |
---|
1012 | if (!(name.equals(PARAM_OPERATION) || name.equals(PARAM_VERSION))) { |
---|
1013 | list.add(name); |
---|
1014 | } |
---|
1015 | } |
---|
1016 | return list; |
---|
1017 | } |
---|
1018 | |
---|
1019 | |
---|
1020 | private String getParameter(String name, boolean nullify, |
---|
1021 | boolean diagnosticIfEmpty) { |
---|
1022 | String s = request.getParameter(name); |
---|
1023 | if (s != null) { |
---|
1024 | s = s.trim(); |
---|
1025 | if (nullify && s.isEmpty()) { |
---|
1026 | s = null; |
---|
1027 | if (diagnosticIfEmpty) { |
---|
1028 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_PARAMETER_VALUE, |
---|
1029 | name, "An empty parameter \"" + name + |
---|
1030 | "\" is not supported."); |
---|
1031 | } |
---|
1032 | } |
---|
1033 | } |
---|
1034 | return s; |
---|
1035 | } |
---|
1036 | |
---|
1037 | |
---|
1038 | private SRUVersion parseAndCheckVersionParameter(SRUOperation operation) { |
---|
1039 | final String v = getParameter(PARAM_VERSION, true, true); |
---|
1040 | if (v != null) { |
---|
1041 | SRUVersion version = null; |
---|
1042 | if (v.equals(VERSION_1_1)) { |
---|
1043 | version = SRUVersion.VERSION_1_1; |
---|
1044 | } else if (v.equals(VERSION_1_2)) { |
---|
1045 | version = SRUVersion.VERSION_1_2; |
---|
1046 | } else { |
---|
1047 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_VERSION, |
---|
1048 | VERSION_1_2, "Version \"" + v + |
---|
1049 | "\" is not supported"); |
---|
1050 | } |
---|
1051 | return version; |
---|
1052 | } else { |
---|
1053 | /* |
---|
1054 | * except for "explain" operation, complain if "version" |
---|
1055 | * parameter was not supplied. |
---|
1056 | */ |
---|
1057 | if (operation != SRUOperation.EXPLAIN) { |
---|
1058 | addDiagnostic( |
---|
1059 | SRUConstants.SRU_MANDATORY_PARAMETER_NOT_SUPPLIED, |
---|
1060 | PARAM_VERSION, "Mandatory parameter \"" + |
---|
1061 | PARAM_VERSION + "\" was not supplied."); |
---|
1062 | } |
---|
1063 | |
---|
1064 | /* |
---|
1065 | * this is an explain operation, assume default version |
---|
1066 | */ |
---|
1067 | return config.getDefaultVersion(); |
---|
1068 | } |
---|
1069 | } |
---|
1070 | |
---|
1071 | |
---|
1072 | private int parseNumberedParameter(String param, String value, |
---|
1073 | int minValue) { |
---|
1074 | int result = -1; |
---|
1075 | |
---|
1076 | if (value != null) { |
---|
1077 | try { |
---|
1078 | result = Integer.parseInt(value); |
---|
1079 | if (result < minValue) { |
---|
1080 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_PARAMETER_VALUE, |
---|
1081 | param, "Value is less than " + minValue + "."); |
---|
1082 | } |
---|
1083 | } catch (NumberFormatException e) { |
---|
1084 | addDiagnostic(SRUConstants.SRU_UNSUPPORTED_PARAMETER_VALUE, |
---|
1085 | param, "Invalid number format."); |
---|
1086 | } |
---|
1087 | } |
---|
1088 | return result; |
---|
1089 | } |
---|
1090 | |
---|
1091 | |
---|
1092 | private CQLNode parseScanQueryParameter(String param, String value) { |
---|
1093 | CQLNode result = null; |
---|
1094 | |
---|
1095 | /* |
---|
1096 | * XXX: maybe query length against limit and return |
---|
1097 | * "Too many characters in query" error? |
---|
1098 | */ |
---|
1099 | try { |
---|
1100 | int compat = -1; |
---|
1101 | switch (version) { |
---|
1102 | case VERSION_1_1: |
---|
1103 | compat = CQLParser.V1POINT1; |
---|
1104 | break; |
---|
1105 | case VERSION_1_2: |
---|
1106 | /* FALL-THROUGH */ |
---|
1107 | case VERSION_2_0: |
---|
1108 | compat = CQLParser.V1POINT2; |
---|
1109 | } |
---|
1110 | result = new CQLParser(compat).parse(value); |
---|
1111 | } catch (CQLParseException e) { |
---|
1112 | addDiagnostic(SRUConstants.SRU_QUERY_SYNTAX_ERROR, |
---|
1113 | null, "error parsing query"); |
---|
1114 | } catch (IOException e) { |
---|
1115 | addDiagnostic(SRUConstants.SRU_QUERY_SYNTAX_ERROR, |
---|
1116 | null, "error parsing query"); |
---|
1117 | } |
---|
1118 | return result; |
---|
1119 | } |
---|
1120 | |
---|
1121 | } // class SRURequestImpl |
---|