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.client; |
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18 | |
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19 | import java.io.ByteArrayInputStream; |
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20 | import java.io.IOException; |
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21 | import java.io.InputStream; |
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22 | import java.net.URI; |
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23 | import java.net.UnknownHostException; |
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24 | import java.util.ArrayList; |
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25 | import java.util.HashMap; |
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26 | import java.util.List; |
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27 | import java.util.Map; |
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28 | import java.util.concurrent.TimeUnit; |
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29 | |
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30 | import javax.xml.stream.XMLStreamException; |
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31 | import javax.xml.stream.XMLStreamReader; |
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32 | |
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33 | import org.apache.http.HttpEntity; |
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34 | import org.apache.http.HttpResponse; |
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35 | import org.apache.http.HttpStatus; |
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36 | import org.apache.http.StatusLine; |
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37 | import org.apache.http.client.ClientProtocolException; |
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38 | import org.apache.http.client.HttpClient; |
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39 | import org.apache.http.client.methods.HttpGet; |
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40 | import org.apache.http.impl.client.DefaultHttpClient; |
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41 | import org.apache.http.params.CoreProtocolPNames; |
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42 | import org.apache.http.util.EntityUtils; |
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43 | import org.slf4j.Logger; |
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44 | import org.slf4j.LoggerFactory; |
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45 | |
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46 | |
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47 | /** |
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48 | * A simple client to perform SRU operations using callbacks. The application |
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49 | * must provide the appropriate callbacks to receive the results of the |
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50 | * operations. |
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51 | * <p> |
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52 | * This client is reusable but not thread-safe: the application may reuse a |
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53 | * client object, but it may not be concurrently shared between multiple |
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54 | * threads. |
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55 | * </p> |
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56 | * <p> |
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57 | * This class is modeled after Java's SAX-API. |
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58 | * </p> |
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59 | * |
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60 | * @see SRUExplainHandler |
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61 | * @see SRUScanHandler |
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62 | * @see SRUSearchRetrieveHandler |
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63 | * @see SRUDefaultHandlerAdapter |
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64 | */ |
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65 | public class SRUSimpleClient { |
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66 | /** default version the client will use, if not otherwise specified */ |
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67 | public static final SRUVersion DEFAULT_SRU_VERSION = SRUVersion.VERSION_1_2; |
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68 | private static final String SRU_NS = |
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69 | "http://www.loc.gov/zing/srw/"; |
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70 | private static final String SRU_DIAGNOSIC_NS = |
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71 | "http://www.loc.gov/zing/srw/diagnostic/"; |
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72 | private static final String SRU_DIAGNOSTIC_RECORD_SCHEMA = |
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73 | "info:srw/schema/1/diagnostics-v1.1"; |
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74 | private static final String VERSION_1_1 = "1.1"; |
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75 | private static final String VERSION_1_2 = "1.2"; |
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76 | private static final String RECORD_PACKING_XML = "xml"; |
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77 | private static final String RECORD_PACKING_STRING = "string"; |
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78 | private static final Logger logger = |
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79 | LoggerFactory.getLogger(SRUSimpleClient.class); |
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80 | private final SRUVersion defaultVersion; |
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81 | private boolean strictMode; |
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82 | private final Map<String, SRURecordDataParser> parsers; |
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83 | private final HttpClient httpClient; |
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84 | private final XmlStreamReaderProxy proxy = new XmlStreamReaderProxy(); |
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85 | |
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86 | |
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87 | /** |
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88 | * Constructor. This constructor will create a <em>strict</em> client and |
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89 | * use the default SRU version. |
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90 | * |
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91 | * @see #SRUSimpleClient(SRUVersion, boolean) |
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92 | * @see #DEFAULT_SRU_VERSION |
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93 | */ |
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94 | public SRUSimpleClient() { |
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95 | this(DEFAULT_SRU_VERSION, true); |
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96 | } |
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97 | |
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98 | |
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99 | /** |
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100 | * Constructor. This constructor will create a <em>strict</em> client. |
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101 | * |
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102 | * @param defaultVersion |
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103 | * the default version to use for SRU requests; may be overridden |
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104 | * by individual requests |
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105 | * @see #SRUSimpleClient(SRUVersion, boolean) |
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106 | */ |
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107 | public SRUSimpleClient(SRUVersion defaultVersion) { |
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108 | this(defaultVersion, true); |
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109 | } |
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110 | |
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111 | |
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112 | /** |
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113 | * Constructor. |
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114 | * |
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115 | * @param defaultVersion |
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116 | * the default version to use for SRU requests; may be overridden |
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117 | * by individual requests |
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118 | * @param strictMode |
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119 | * if <code>true</code> the client will strictly adhere to the |
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120 | * SRU standard and raise fatal errors on violations, if |
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121 | * <code>false</code> it will act more forgiving and ignore |
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122 | * certain violations |
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123 | */ |
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124 | public SRUSimpleClient(SRUVersion defaultVersion, boolean strictMode) { |
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125 | this(defaultVersion, strictMode, |
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126 | new HashMap<String, SRURecordDataParser>()); |
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127 | } |
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128 | |
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129 | |
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130 | /** |
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131 | * Constructor. |
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132 | * |
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133 | * <p> |
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134 | * For internal use only. |
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135 | * </p> |
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136 | * |
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137 | * @param defaultVersion |
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138 | * the default version to use for SRU requests; may be overridden |
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139 | * by individual requests |
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140 | * @param strictMode |
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141 | * if <code>true</code> the client will strictly adhere to the |
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142 | * SRU standard and raise fatal errors on violations, if |
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143 | * <code>false</code> it will act more forgiving and ignore |
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144 | * certain violations |
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145 | * @param parsers |
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146 | * a <code>Map</code> to store record schema to record data |
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147 | * parser mappings |
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148 | */ |
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149 | SRUSimpleClient(SRUVersion defaultVersion, boolean strictMode, |
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150 | Map<String, SRURecordDataParser> parsers) { |
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151 | if (defaultVersion == null) { |
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152 | throw new NullPointerException("version == null"); |
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153 | } |
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154 | if (parsers == null) { |
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155 | throw new NullPointerException("parsers == null"); |
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156 | } |
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157 | this.defaultVersion = defaultVersion; |
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158 | this.strictMode = strictMode; |
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159 | this.parsers = parsers; |
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160 | this.httpClient = new DefaultHttpClient(); |
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161 | this.httpClient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, |
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162 | "eu.clarin.sru.client/0.0.1"); |
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163 | } |
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164 | |
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165 | |
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166 | /** |
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167 | * Get the SRU protocol conformance mode of the client. |
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168 | * |
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169 | * @return <code>true</code> if the client operation in strict mode, |
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170 | * <code>false</code> otherwise |
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171 | */ |
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172 | public boolean isStrictMode() { |
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173 | return strictMode; |
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174 | } |
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175 | |
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176 | |
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177 | /** |
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178 | * Set the SRU protocol conformance mode of the client. |
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179 | * |
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180 | * @param strictMode |
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181 | * <code>true</code> if the client should operate in strict mode, |
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182 | * <code>false</code> if the client should be more tolerant |
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183 | */ |
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184 | public void setStrictMode(boolean strictMode) { |
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185 | this.strictMode = strictMode; |
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186 | } |
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187 | |
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188 | |
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189 | /** |
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190 | * Register a record data parser. |
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191 | * |
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192 | * @param parser |
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193 | * a parser instance |
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194 | * @throws SRUClientException |
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195 | * if a parser handing the same record schema is already |
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196 | * registered |
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197 | * @throws NullPointerException |
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198 | * if any required argument is <code>null</code> |
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199 | * @throws IllegalArgumentException |
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200 | * if the supplied parser is invalid |
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201 | */ |
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202 | public void registerRecordParser(SRURecordDataParser parser) |
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203 | throws SRUClientException { |
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204 | if (parser == null) { |
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205 | throw new NullPointerException("parser == null"); |
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206 | } |
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207 | final String recordSchema = parser.getRecordSchema(); |
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208 | if (recordSchema == null) { |
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209 | throw new NullPointerException("parser.getRecordSchema() == null"); |
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210 | } |
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211 | if (recordSchema.isEmpty()) { |
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212 | throw new IllegalArgumentException( |
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213 | "parser.getRecordSchema() returns empty string"); |
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214 | } |
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215 | |
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216 | if (!parsers.containsKey(recordSchema)) { |
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217 | parsers.put(recordSchema, parser); |
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218 | } else { |
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219 | throw new SRUClientException( |
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220 | "record data parser already registered: " + recordSchema); |
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221 | } |
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222 | } |
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223 | |
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224 | |
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225 | /** |
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226 | * Perform a <em>explain</em> operation. |
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227 | * |
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228 | * @param request |
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229 | * an instance of a {@link SRUExplainRequest} object |
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230 | * @param handler |
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231 | * an instance of {@link SRUExplainHandler} to receive callbacks |
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232 | * when processing the result of this request |
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233 | * @throws SRUClientException |
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234 | * if an unrecoverable error occurred |
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235 | * @throws NullPointerException |
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236 | * if any required argument is <code>null</code> |
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237 | * @see SRUExplainRequest |
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238 | * @see SRUExplainHandler |
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239 | */ |
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240 | public void explain(SRUExplainRequest request, SRUExplainHandler handler) |
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241 | throws SRUClientException { |
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242 | if (request == null) { |
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243 | throw new NullPointerException("request == null"); |
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244 | } |
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245 | if (handler == null) { |
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246 | throw new NullPointerException("handler == null"); |
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247 | } |
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248 | logger.debug("explain"); |
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249 | |
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250 | final long ts_start = System.nanoTime(); |
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251 | |
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252 | // create URI and perform request |
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253 | final URI uri = request.makeURI(defaultVersion); |
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254 | HttpResponse response = executeRequest(uri); |
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255 | HttpEntity entity = response.getEntity(); |
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256 | if (entity == null) { |
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257 | throw new SRUClientException("cannot get entity"); |
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258 | } |
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259 | |
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260 | InputStream stream = null; |
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261 | SRUXMLStreamReader reader = null; |
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262 | try { |
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263 | stream = entity.getContent(); |
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264 | |
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265 | final long ts_parsing = System.nanoTime(); |
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266 | reader = createReader(stream, true); |
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267 | parseExplainResponse(reader, request, handler); |
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268 | final long ts_end = System.nanoTime(); |
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269 | |
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270 | final long millisTotal = |
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271 | TimeUnit.NANOSECONDS.toMillis(ts_end - ts_start); |
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272 | final long millisNetwork = |
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273 | TimeUnit.NANOSECONDS.toMillis(ts_parsing - ts_start); |
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274 | final long millisProcessing = |
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275 | TimeUnit.NANOSECONDS.toMillis(ts_end - ts_parsing); |
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276 | logger.debug("{} byte(s) in {} milli(s) " + |
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277 | "({} milli(s) network / {} milli(s) processing)", |
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278 | new Object[] { reader.getByteCount(), |
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279 | millisTotal, millisNetwork, millisProcessing }); |
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280 | handler.onRequestStatistics((int) reader.getByteCount(), |
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281 | millisTotal, millisNetwork, millisProcessing); |
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282 | } catch (IllegalStateException e) { |
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283 | throw new SRUClientException("error reading response", e); |
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284 | } catch (IOException e) { |
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285 | throw new SRUClientException("error reading response", e); |
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286 | } catch (XMLStreamException e) { |
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287 | throw new SRUClientException("error reading response", e); |
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288 | } finally { |
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289 | if (reader != null) { |
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290 | try { |
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291 | reader.close(); |
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292 | } catch (XMLStreamException e) { |
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293 | /* IGNORE */ |
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294 | } |
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295 | } |
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296 | if (stream != null) { |
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297 | try { |
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298 | stream.close(); |
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299 | } catch (IOException e) { |
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300 | /* IGNORE */ |
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301 | } |
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302 | } |
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303 | } |
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304 | } |
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305 | |
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306 | |
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307 | /** |
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308 | * Perform a <em>scan</em> operation. |
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309 | * |
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310 | * @param request |
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311 | * an instance of a {@link SRUScanRequest} object |
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312 | * @param handler |
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313 | * an instance of {@link SRUScanHandler} to receive callbacks |
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314 | * when processing the result of this request |
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315 | * @throws SRUClientException |
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316 | * if an unrecoverable error occurred |
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317 | * @throws NullPointerException |
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318 | * if any required argument is <code>null</code> |
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319 | * @see SRUScanRequest |
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320 | * @see SRUScanHandler |
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321 | */ |
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322 | public void scan(SRUScanRequest request, SRUScanHandler handler) |
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323 | throws SRUClientException { |
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324 | if (request == null) { |
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325 | throw new NullPointerException("request == null"); |
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326 | } |
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327 | if (handler == null) { |
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328 | throw new NullPointerException("handler == null"); |
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329 | } |
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330 | logger.debug("searchRetrieve: scanClause = {}", request.getScanClause()); |
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331 | |
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332 | final long ts_start = System.nanoTime(); |
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333 | |
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334 | // create URI and perform request |
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335 | final URI uri = request.makeURI(defaultVersion); |
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336 | HttpResponse response = executeRequest(uri); |
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337 | HttpEntity entity = response.getEntity(); |
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338 | if (entity == null) { |
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339 | throw new SRUClientException("cannot get entity"); |
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340 | } |
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341 | |
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342 | InputStream stream = null; |
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343 | SRUXMLStreamReader reader = null; |
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344 | try { |
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345 | stream = entity.getContent(); |
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346 | |
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347 | final long ts_parsing = System.nanoTime(); |
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348 | reader = createReader(stream, true); |
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349 | parseScanResponse(reader, request, handler); |
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350 | final long ts_end = System.nanoTime(); |
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351 | |
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352 | final long millisTotal = |
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353 | TimeUnit.NANOSECONDS.toMillis(ts_end - ts_start); |
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354 | final long millisNetwork = |
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355 | TimeUnit.NANOSECONDS.toMillis(ts_parsing - ts_start); |
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356 | final long millisProcessing = |
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357 | TimeUnit.NANOSECONDS.toMillis(ts_end - ts_parsing); |
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358 | logger.debug("{} byte(s) in {} milli(s) " + |
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359 | "({} milli(s) network / {} milli(s) processing)", |
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360 | new Object[] { reader.getByteCount(), |
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361 | millisTotal, millisNetwork, millisProcessing }); |
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362 | handler.onRequestStatistics((int) reader.getByteCount(), |
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363 | millisTotal, millisNetwork, millisProcessing); |
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364 | } catch (IllegalStateException e) { |
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365 | throw new SRUClientException("error reading response", e); |
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366 | } catch (IOException e) { |
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367 | throw new SRUClientException("error reading response", e); |
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368 | } catch (XMLStreamException e) { |
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369 | throw new SRUClientException("error reading response", e); |
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370 | } finally { |
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371 | if (reader != null) { |
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372 | try { |
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373 | reader.close(); |
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374 | } catch (XMLStreamException e) { |
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375 | /* IGNORE */ |
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376 | } |
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377 | } |
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378 | if (stream != null) { |
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379 | try { |
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380 | stream.close(); |
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381 | } catch (IOException e) { |
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382 | /* IGNORE */ |
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383 | } |
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384 | } |
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385 | } |
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386 | } |
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387 | |
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388 | |
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389 | /** |
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390 | * Perform a <em>searchRetrieve</em> operation. |
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391 | * |
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392 | * @param request |
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393 | * an instance of a {@link SRUSearchRetrieveRequest} object |
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394 | * @param handler |
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395 | * an instance of {@link SRUSearchRetrieveHandler} to receive |
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396 | * callbacks when processing the result of this request |
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397 | * @throws SRUClientException |
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398 | * if an unrecoverable error occurred |
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399 | * @throws NullPointerException |
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400 | * if any required argument is <code>null</code> |
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401 | * @see SRUSearchRetrieveRequest |
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402 | * @see SRUSearchRetrieveHandler |
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403 | */ |
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404 | public void searchRetrieve(SRUSearchRetrieveRequest request, |
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405 | SRUSearchRetrieveHandler handler) throws SRUClientException { |
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406 | if (request == null) { |
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407 | throw new NullPointerException("request == null"); |
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408 | } |
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409 | if (handler == null) { |
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410 | throw new NullPointerException("handler == null"); |
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411 | } |
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412 | logger.debug("searchRetrieve: query = {}", request.getQuery()); |
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413 | |
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414 | final long ts_start = System.nanoTime(); |
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415 | |
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416 | // create URI and perform request |
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417 | final URI uri = request.makeURI(defaultVersion); |
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418 | HttpResponse response = executeRequest(uri); |
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419 | HttpEntity entity = response.getEntity(); |
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420 | if (entity == null) { |
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421 | throw new SRUClientException("cannot get entity"); |
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422 | } |
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423 | |
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424 | InputStream stream = null; |
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425 | SRUXMLStreamReader reader = null; |
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426 | try { |
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427 | stream = entity.getContent(); |
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428 | |
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429 | final long ts_parsing = System.nanoTime(); |
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430 | reader = createReader(stream, true); |
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431 | parseSearchRetrieveResponse(reader, request, handler); |
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432 | final long ts_end = System.nanoTime(); |
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433 | |
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434 | final long millisTotal = |
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435 | TimeUnit.NANOSECONDS.toMillis(ts_end - ts_start); |
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436 | final long millisNetwork = |
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437 | TimeUnit.NANOSECONDS.toMillis(ts_parsing - ts_start); |
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438 | final long millisProcessing = |
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439 | TimeUnit.NANOSECONDS.toMillis(ts_end - ts_parsing); |
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440 | logger.debug("{} byte(s) in {} milli(s) " + |
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441 | "({} milli(s) network / {} milli(s) processing)", |
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442 | new Object[] { reader.getByteCount(), |
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443 | millisTotal, millisNetwork, millisProcessing }); |
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444 | handler.onRequestStatistics((int) reader.getByteCount(), |
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445 | millisTotal, millisNetwork, millisProcessing); |
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446 | } catch (IllegalStateException e) { |
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447 | throw new SRUClientException("error reading response", e); |
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448 | } catch (IOException e) { |
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449 | throw new SRUClientException("error reading response", e); |
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450 | } catch (XMLStreamException e) { |
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451 | throw new SRUClientException("error reading response", e); |
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452 | } finally { |
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453 | if (reader != null) { |
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454 | try { |
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455 | reader.close(); |
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456 | } catch (XMLStreamException e) { |
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457 | /* IGNORE */ |
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458 | } |
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459 | } |
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460 | if (stream != null) { |
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461 | try { |
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462 | stream.close(); |
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463 | } catch (IOException e) { |
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464 | /* IGNORE */ |
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465 | } |
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466 | } |
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467 | } |
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468 | } |
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469 | |
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470 | |
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471 | private HttpResponse executeRequest(URI uri) throws SRUClientException { |
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472 | HttpGet request = null; |
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473 | HttpResponse response = null; |
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474 | try { |
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475 | logger.debug("performing HTTP request: {}", uri.toString()); |
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476 | try { |
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477 | request = new HttpGet(uri); |
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478 | response = httpClient.execute(request); |
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479 | StatusLine status = response.getStatusLine(); |
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480 | if (status.getStatusCode() != HttpStatus.SC_OK) { |
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481 | if (status.getStatusCode() == HttpStatus.SC_NOT_FOUND) { |
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482 | throw new SRUClientException("not found: " + uri); |
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483 | } else { |
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484 | throw new SRUClientException("unexpected status: " + |
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485 | status.getStatusCode()); |
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486 | } |
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487 | } |
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488 | return response; |
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489 | } catch (ClientProtocolException e) { |
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490 | throw new SRUClientException("client protocol exception", e); |
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491 | } catch (UnknownHostException e) { |
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492 | throw new SRUClientException( |
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493 | "unknown host: " + uri.getHost(), e); |
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494 | } catch (IOException e) { |
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495 | String msg = null; |
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496 | if ((e.getMessage() != null) && !e.getMessage().isEmpty()) { |
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497 | msg = e.getMessage(); |
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498 | } |
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499 | throw new SRUClientException(msg != null |
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500 | ? msg |
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501 | : "input/output error", e); |
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502 | } |
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503 | } catch (SRUClientException e) { |
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504 | /* |
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505 | * if an error occurred, make sure we are freeing up the resources |
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506 | * we've used |
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507 | */ |
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508 | if (response != null) { |
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509 | try { |
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510 | EntityUtils.consume(response.getEntity()); |
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511 | } catch (IOException ex) { |
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512 | /* IGNORE */ |
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513 | } |
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514 | } |
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515 | if (request != null) { |
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516 | request.abort(); |
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517 | } |
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518 | throw e; |
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519 | } |
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520 | } |
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521 | |
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522 | |
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523 | private void parseExplainResponse(final SRUXMLStreamReader reader, |
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524 | final SRUAbstractRequest request, final SRUExplainHandler handler) |
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525 | throws SRUClientException { |
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526 | logger.debug("parsing 'explain' response"); |
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527 | try { |
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528 | // explainResponse |
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529 | reader.readStart(SRU_NS, "explainResponse", true); |
---|
530 | |
---|
531 | // explainResponse/version |
---|
532 | SRUVersion version = parseVersion(reader); |
---|
533 | logger.debug("version = {}, requested = {}", |
---|
534 | version, request.getVersionPerformed()); |
---|
535 | |
---|
536 | // explainResponse/record |
---|
537 | reader.readStart(SRU_NS, "record", true); |
---|
538 | |
---|
539 | String schema = reader.readContent(SRU_NS, "recordSchema", true); |
---|
540 | |
---|
541 | SRURecordPacking packing = parseRecordPacking(reader, strictMode); |
---|
542 | |
---|
543 | logger.debug("schema = {}, packing = {}", schema, packing); |
---|
544 | |
---|
545 | // explainResponse/record/recordData |
---|
546 | reader.readStart(SRU_NS, "recordData", true); |
---|
547 | reader.readEnd(SRU_NS, "recordData", true); |
---|
548 | |
---|
549 | // explainResponse/record/recordPosition |
---|
550 | if (reader.readStart(SRU_NS, "recordPosition", false)) { |
---|
551 | reader.readEnd(SRU_NS, "recordPosition", true); |
---|
552 | } |
---|
553 | |
---|
554 | // explainResponse/record/extraRecordData |
---|
555 | if (reader.readStart(SRU_NS, "extraRecordData", false)) { |
---|
556 | reader.readEnd(SRU_NS, "extraRecordData", true); |
---|
557 | } |
---|
558 | |
---|
559 | reader.readEnd(SRU_NS, "record"); |
---|
560 | |
---|
561 | // explainResponse/echoedExplainRequest |
---|
562 | if (reader.readStart(SRU_NS, "echoedExplainRequest", false)) { |
---|
563 | reader.readEnd(SRU_NS, "echoedExplainRequest", true); |
---|
564 | } |
---|
565 | |
---|
566 | /* |
---|
567 | * common error: echoedExplainRequest in default namespace |
---|
568 | */ |
---|
569 | if (reader.readStart("", "echoedExplainRequest", false)) { |
---|
570 | logger.error("Element 'echoedExplainRequest' must be in SRU namespace, but endpoint put it into default namespace"); |
---|
571 | if (strictMode) { |
---|
572 | throw new SRUClientException("Element 'echoedExplainRequest' must be in SRU namespace, but endpoint put it into default namespace"); |
---|
573 | } |
---|
574 | reader.readEnd("", "echoedExplainRequest", true); |
---|
575 | } |
---|
576 | |
---|
577 | // explainResponse/diagnostics |
---|
578 | final List<SRUDiagnostic> diagnostics = parseDiagnostics(reader); |
---|
579 | if (diagnostics != null) { |
---|
580 | handler.onDiagnostics(diagnostics); |
---|
581 | } |
---|
582 | |
---|
583 | // explainResponse/extraResponseData |
---|
584 | if (reader.readStart(SRU_NS, "extraResponseData", false)) { |
---|
585 | reader.consumeWhitespace(); |
---|
586 | proxy.reset(reader); |
---|
587 | try { |
---|
588 | handler.onExtraResponseData(proxy); |
---|
589 | } catch (XMLStreamException e) { |
---|
590 | throw new SRUClientException("handler triggered " |
---|
591 | + "error while parsing 'extraResponseData'", e); |
---|
592 | } |
---|
593 | reader.consumeWhitespace(); |
---|
594 | reader.readEnd(SRU_NS, "extraResponseData", true); |
---|
595 | } |
---|
596 | |
---|
597 | reader.readEnd(SRU_NS, "explainResponse"); |
---|
598 | } catch (XMLStreamException e) { |
---|
599 | throw new SRUClientException(e.getMessage(), e); |
---|
600 | } |
---|
601 | } |
---|
602 | |
---|
603 | |
---|
604 | private void parseScanResponse(final SRUXMLStreamReader reader, |
---|
605 | final SRUScanRequest request, final SRUScanHandler handler) |
---|
606 | throws SRUClientException { |
---|
607 | try { |
---|
608 | /* |
---|
609 | * if the endpoint cannot determine the operation, it should create |
---|
610 | * a explain response. |
---|
611 | */ |
---|
612 | if (reader.peekStart(SRU_NS, "explainResponse")) { |
---|
613 | parseExplainResponse(reader, request, new SRUExplainHandler() { |
---|
614 | @Override |
---|
615 | public void onRequestStatistics(int bytes, long millisTotal, |
---|
616 | long millisNetwork, long millisParsing) { |
---|
617 | } |
---|
618 | |
---|
619 | |
---|
620 | @Override |
---|
621 | public void onExtraResponseData(XMLStreamReader reader) |
---|
622 | throws XMLStreamException, SRUClientException { |
---|
623 | } |
---|
624 | |
---|
625 | |
---|
626 | @Override |
---|
627 | public void onDiagnostics(List<SRUDiagnostic> diagnostics) |
---|
628 | throws SRUClientException { |
---|
629 | handler.onDiagnostics(diagnostics); |
---|
630 | } |
---|
631 | }); |
---|
632 | } else { |
---|
633 | logger.debug("parsing 'scanResponse' response"); |
---|
634 | |
---|
635 | // scanResponse |
---|
636 | reader.readStart(SRU_NS, "scanResponse", true); |
---|
637 | |
---|
638 | // scanResponse/version |
---|
639 | SRUVersion version = parseVersion(reader); |
---|
640 | logger.debug("version = {}, requested = {}", version, |
---|
641 | request.getVersionPerformed()); |
---|
642 | |
---|
643 | // scanResponse/terms |
---|
644 | if (reader.readStart(SRU_NS, "terms", false)) { |
---|
645 | boolean first = true; |
---|
646 | while (reader.readStart(SRU_NS, "term", first)) { |
---|
647 | if (first) { |
---|
648 | first = false; |
---|
649 | handler.onStartTerms(); |
---|
650 | } |
---|
651 | |
---|
652 | // scanResponse/terms/value |
---|
653 | String value = reader |
---|
654 | .readContent(SRU_NS, "value", true); |
---|
655 | |
---|
656 | // scanResponse/terms/numberOfRecords |
---|
657 | int numberOfRecords = reader.readContent(SRU_NS, |
---|
658 | "numberOfRecords", false, -1); |
---|
659 | |
---|
660 | // scanResponse/terms/displayTerm |
---|
661 | String displayTerm = reader.readContent(SRU_NS, |
---|
662 | "displayTerm", false); |
---|
663 | |
---|
664 | // scanResponse/terms/whereInList |
---|
665 | String s = reader.readContent(SRU_NS, |
---|
666 | "whereInList", false); |
---|
667 | SRUWhereInList whereInList = null; |
---|
668 | if (s != null) { |
---|
669 | if ("first".equals(s)) { |
---|
670 | whereInList = SRUWhereInList.FIRST; |
---|
671 | } else if ("last".equals(s)) { |
---|
672 | whereInList = SRUWhereInList.LAST; |
---|
673 | } else if ("only".equals(s)) { |
---|
674 | whereInList = SRUWhereInList.ONLY; |
---|
675 | } else if ("inner".equals(s)) { |
---|
676 | whereInList = SRUWhereInList.INNER; |
---|
677 | } else { |
---|
678 | throw new SRUClientException( |
---|
679 | "invalid value for 'whereInList': " + s); |
---|
680 | } |
---|
681 | } |
---|
682 | logger.debug("value = {}, numberOfRecords = {}, " |
---|
683 | + "displayTerm = {}, whereInList = {}", |
---|
684 | new Object[] { value, numberOfRecords, |
---|
685 | displayTerm, whereInList }); |
---|
686 | handler.onTerm(value, numberOfRecords, displayTerm, |
---|
687 | whereInList); |
---|
688 | |
---|
689 | // scanResponse/terms/extraTermData |
---|
690 | if (reader.readStart(SRU_NS, "extraTermData", first)) { |
---|
691 | reader.consumeWhitespace(); |
---|
692 | proxy.reset(reader); |
---|
693 | try { |
---|
694 | handler.onExtraTermData(value, proxy); |
---|
695 | } catch (XMLStreamException e) { |
---|
696 | throw new SRUClientException("handler " |
---|
697 | + "triggered error while parsing " |
---|
698 | + "'extraTermData'", e); |
---|
699 | } |
---|
700 | reader.consumeWhitespace(); |
---|
701 | reader.readEnd(SRU_NS, "extraTermData", true); |
---|
702 | } |
---|
703 | reader.readEnd(SRU_NS, "term", true); |
---|
704 | |
---|
705 | } // while |
---|
706 | reader.readEnd(SRU_NS, "terms"); |
---|
707 | handler.onFinishTerms(); |
---|
708 | } |
---|
709 | |
---|
710 | // scanResponse/echoedScanRequest |
---|
711 | if (reader.readStart(SRU_NS, "echoedScanRequest", false)) { |
---|
712 | reader.readEnd(SRU_NS, "echoedScanRequest", true); |
---|
713 | } |
---|
714 | |
---|
715 | /* |
---|
716 | * common error: echoedScanRequest in default namespace |
---|
717 | */ |
---|
718 | if (reader.readStart("", "echoedScanRequest", false)) { |
---|
719 | logger.error("Element 'echoedScanRequest' must be in SRU namespace, but endpoint put it into default namespace"); |
---|
720 | if (strictMode) { |
---|
721 | throw new SRUClientException("Element 'echoedScanRequest' must be in SRU namespace, but endpoint put it into default namespace"); |
---|
722 | } |
---|
723 | reader.readEnd("", "echoedScanRequest", true); |
---|
724 | } |
---|
725 | |
---|
726 | // scanResponse/diagnostics |
---|
727 | final List<SRUDiagnostic> diagnostics = parseDiagnostics(reader); |
---|
728 | if (diagnostics != null) { |
---|
729 | handler.onDiagnostics(diagnostics); |
---|
730 | } |
---|
731 | |
---|
732 | // scanResponse/extraResponseData |
---|
733 | if (reader.readStart(SRU_NS, "extraResponseData", false)) { |
---|
734 | reader.consumeWhitespace(); |
---|
735 | proxy.reset(reader); |
---|
736 | try { |
---|
737 | handler.onExtraResponseData(proxy); |
---|
738 | } catch (XMLStreamException e) { |
---|
739 | throw new SRUClientException("handler triggered " |
---|
740 | + "error while parsing 'extraResponseData'", e); |
---|
741 | } |
---|
742 | reader.consumeWhitespace(); |
---|
743 | reader.readEnd(SRU_NS, "extraResponseData", true); |
---|
744 | } |
---|
745 | |
---|
746 | reader.readEnd(SRU_NS, "scanResponse"); |
---|
747 | } |
---|
748 | } catch (XMLStreamException e) { |
---|
749 | throw new SRUClientException(e.getMessage(), e); |
---|
750 | } |
---|
751 | } |
---|
752 | |
---|
753 | |
---|
754 | private void parseSearchRetrieveResponse(final SRUXMLStreamReader reader, |
---|
755 | final SRUSearchRetrieveRequest request, |
---|
756 | final SRUSearchRetrieveHandler handler) throws SRUClientException { |
---|
757 | try { |
---|
758 | /* |
---|
759 | * if the endpoint cannot determine the operation, it should create |
---|
760 | * a explain response. |
---|
761 | */ |
---|
762 | if (reader.peekStart(SRU_NS, "explainResponse")) { |
---|
763 | parseExplainResponse(reader, request, new SRUExplainHandler() { |
---|
764 | @Override |
---|
765 | public void onRequestStatistics(int bytes, long millisTotal, |
---|
766 | long millisNetwork, long millisParsing) { |
---|
767 | } |
---|
768 | |
---|
769 | |
---|
770 | @Override |
---|
771 | public void onExtraResponseData(XMLStreamReader reader) |
---|
772 | throws XMLStreamException, SRUClientException { |
---|
773 | } |
---|
774 | |
---|
775 | |
---|
776 | @Override |
---|
777 | public void onDiagnostics(List<SRUDiagnostic> diagnostics) |
---|
778 | throws SRUClientException { |
---|
779 | handler.onDiagnostics(diagnostics); |
---|
780 | } |
---|
781 | }); |
---|
782 | } else { |
---|
783 | logger.debug("parsing 'serarchRetrieve' response"); |
---|
784 | |
---|
785 | // searchRetrieveResponse |
---|
786 | reader.readStart(SRU_NS, "searchRetrieveResponse", true); |
---|
787 | |
---|
788 | // searchRetrieveResponse/version |
---|
789 | SRUVersion version = parseVersion(reader); |
---|
790 | logger.debug("version = {}, requested = {}", version, |
---|
791 | request.getVersionPerformed()); |
---|
792 | |
---|
793 | // searchRetrieveResponse/numberOfRecords |
---|
794 | int numberOfRecords = reader.readContent(SRU_NS, |
---|
795 | "numberOfRecords", true, -1); |
---|
796 | |
---|
797 | // searchRetrieveResponse/resultSetId |
---|
798 | String resultSetId = reader.readContent(SRU_NS, |
---|
799 | "resultSetId", false); |
---|
800 | |
---|
801 | // searchRetrieveResponse/resultSetIdleTime |
---|
802 | int resultSetIdleTime = reader.readContent(SRU_NS, |
---|
803 | "resultSetIdleTime", false, -1); |
---|
804 | |
---|
805 | logger.debug("numberOfRecords = {}, resultSetId = {}, " |
---|
806 | + "resultSetIdleTime = {}", new Object[] { |
---|
807 | numberOfRecords, resultSetId, resultSetIdleTime }); |
---|
808 | |
---|
809 | // searchRetrieveResponse/results |
---|
810 | if (numberOfRecords > 0) { |
---|
811 | reader.readStart(SRU_NS, "records", true); |
---|
812 | |
---|
813 | // searchRetrieveResponse/records/record |
---|
814 | boolean first = true; |
---|
815 | while (reader.readStart(SRU_NS, "record", first)) { |
---|
816 | if (first) { |
---|
817 | first = false; |
---|
818 | handler.onStartRecords(numberOfRecords, |
---|
819 | resultSetId, resultSetIdleTime); |
---|
820 | } |
---|
821 | |
---|
822 | String schema = reader.readContent(SRU_NS, |
---|
823 | "recordSchema", true); |
---|
824 | |
---|
825 | SRURecordPacking packing = |
---|
826 | parseRecordPacking(reader, strictMode); |
---|
827 | |
---|
828 | logger.debug("schema = {}, packing = {}, " + |
---|
829 | "requested packing = {}", |
---|
830 | new Object[] { schema, packing, |
---|
831 | request.getRecordPacking() }); |
---|
832 | |
---|
833 | if ((request.getRecordPacking() != null) && |
---|
834 | (packing != request.getRecordPacking())) { |
---|
835 | final SRURecordPacking p = |
---|
836 | request.getRecordPacking(); |
---|
837 | logger.error("requested '{}' record packing, but " + |
---|
838 | "server responded with '{}' record packing", |
---|
839 | p.getStringValue(), |
---|
840 | packing.getStringValue()); |
---|
841 | if (strictMode) { |
---|
842 | throw new SRUClientException("requested '" + |
---|
843 | p.getStringValue() + |
---|
844 | "' record packing, but server " + |
---|
845 | "responded with '" + |
---|
846 | packing.getStringValue() + |
---|
847 | "' record packing"); |
---|
848 | } |
---|
849 | } |
---|
850 | |
---|
851 | // searchRetrieveResponse/record/recordData |
---|
852 | reader.readStart(SRU_NS, "recordData", true); |
---|
853 | reader.consumeWhitespace(); |
---|
854 | |
---|
855 | SRURecordData recordData = null; |
---|
856 | SRUDiagnostic surrogate = null; |
---|
857 | SRUXMLStreamReader recordReader = null; |
---|
858 | |
---|
859 | if (packing == SRURecordPacking.STRING) { |
---|
860 | /* |
---|
861 | * read content into temporary buffer and then use |
---|
862 | * a new XML reader to parse record data |
---|
863 | */ |
---|
864 | final String data = reader.readString(true); |
---|
865 | InputStream in = |
---|
866 | new ByteArrayInputStream(data.getBytes()); |
---|
867 | // FIXME: namespace context? |
---|
868 | recordReader = createReader(in, false); |
---|
869 | } else { |
---|
870 | recordReader = reader; |
---|
871 | } |
---|
872 | |
---|
873 | if (SRU_DIAGNOSTIC_RECORD_SCHEMA.equals(schema)) { |
---|
874 | surrogate = parseDiagnostic(recordReader, true); |
---|
875 | } else { |
---|
876 | SRURecordDataParser parser = findParser(schema); |
---|
877 | if (parser != null) { |
---|
878 | try { |
---|
879 | proxy.reset(recordReader); |
---|
880 | recordData = parser.parse(proxy); |
---|
881 | } catch (XMLStreamException e) { |
---|
882 | throw new SRUClientException( |
---|
883 | "error parsing record", e); |
---|
884 | } |
---|
885 | if (recordData == null) { |
---|
886 | logger.debug("parser did not parse " + |
---|
887 | "record correctly and returned " + |
---|
888 | "null."); |
---|
889 | surrogate = new SRUDiagnostic( |
---|
890 | SRUClientDiagnostics.DIAG_RECORD_PARSER_NULL, |
---|
891 | null, "Record parser for schema '" + |
---|
892 | schema + "' did nor " + |
---|
893 | "parse record correctly " + |
---|
894 | "and errornously " + |
---|
895 | "returned null."); |
---|
896 | } |
---|
897 | } else { |
---|
898 | /* |
---|
899 | * no record parser found, inject a |
---|
900 | * surrogate diagnostic |
---|
901 | */ |
---|
902 | logger.debug("no record data parser found " + |
---|
903 | "for schema '{}'", schema); |
---|
904 | surrogate = new SRUDiagnostic( |
---|
905 | SRUClientDiagnostics.DIAG_NO_RECORD_PARSER, |
---|
906 | schema, |
---|
907 | "No record data parser for schema '" + |
---|
908 | schema + "' found."); |
---|
909 | } |
---|
910 | } |
---|
911 | |
---|
912 | if (packing == SRURecordPacking.STRING) { |
---|
913 | recordReader.closeCompletly(); |
---|
914 | } |
---|
915 | |
---|
916 | reader.consumeWhitespace(); |
---|
917 | reader.readEnd(SRU_NS, "recordData", true); |
---|
918 | |
---|
919 | String identifier = null; |
---|
920 | if (version == SRUVersion.VERSION_1_2) { |
---|
921 | identifier = reader.readContent(SRU_NS, |
---|
922 | "recordIdentifier", false); |
---|
923 | } |
---|
924 | |
---|
925 | int position = reader.readContent(SRU_NS, |
---|
926 | "recordPosition", false, -1); |
---|
927 | |
---|
928 | logger.debug("recordIdentifier = {}, recordPosition = {}", |
---|
929 | identifier, position); |
---|
930 | |
---|
931 | // notify handler |
---|
932 | if (surrogate != null) { |
---|
933 | handler.onSurrogateRecord(identifier, |
---|
934 | position, surrogate); |
---|
935 | } else { |
---|
936 | if (recordData != null) { |
---|
937 | handler.onRecord(identifier, |
---|
938 | position, recordData); |
---|
939 | } |
---|
940 | } |
---|
941 | |
---|
942 | if (reader.readStart(SRU_NS, "extraRecordData", false)) { |
---|
943 | reader.consumeWhitespace(); |
---|
944 | proxy.reset(reader); |
---|
945 | try { |
---|
946 | handler.onExtraRecordData(identifier, |
---|
947 | position, proxy); |
---|
948 | } catch (XMLStreamException e) { |
---|
949 | throw new SRUClientException("handler " |
---|
950 | + "triggered error while parsing " |
---|
951 | + "'extraRecordData'", e); |
---|
952 | } |
---|
953 | reader.consumeWhitespace(); |
---|
954 | reader.readEnd(SRU_NS, "extraRecordData", true); |
---|
955 | } |
---|
956 | |
---|
957 | reader.readEnd(SRU_NS, "record"); |
---|
958 | } // while |
---|
959 | reader.readEnd(SRU_NS, "records"); |
---|
960 | } else { |
---|
961 | /* |
---|
962 | * provide a better error format, if |
---|
963 | */ |
---|
964 | if (reader.readStart(SRU_NS, "records", false)) { |
---|
965 | int bad = 0; |
---|
966 | while (reader.readStart(SRU_NS, "record", false)) { |
---|
967 | bad++; |
---|
968 | reader.readEnd(SRU_NS, "record", true); |
---|
969 | } |
---|
970 | reader.readEnd(SRU_NS, "records", true); |
---|
971 | if (bad == 0) { |
---|
972 | logger.error("endpoint declared 0 results, but " + |
---|
973 | "response contained an empty 'records' " + |
---|
974 | "element"); |
---|
975 | if (strictMode) { |
---|
976 | throw new SRUClientException( |
---|
977 | "endpoint declared 0 results, but " + |
---|
978 | "response contained an empty " + |
---|
979 | "'records' element (behavior " + |
---|
980 | "violates SRU specification)"); |
---|
981 | } |
---|
982 | } else { |
---|
983 | logger.error("endpoint declared 0 results, but " + |
---|
984 | "response contained an " + bad + |
---|
985 | " record(s)"); |
---|
986 | if (strictMode) { |
---|
987 | throw new SRUClientException( |
---|
988 | "endpoint declared 0 results, " + |
---|
989 | "but response containted " + bad + |
---|
990 | " records (behavior may violate " + |
---|
991 | "SRU specification)"); |
---|
992 | } |
---|
993 | } |
---|
994 | } |
---|
995 | } |
---|
996 | |
---|
997 | int nextRecordPosition = reader.readContent(SRU_NS, |
---|
998 | "nextRecordPosition", false, -1); |
---|
999 | logger.debug("nextRecordPosition = {}", nextRecordPosition); |
---|
1000 | handler.onFinishRecords(nextRecordPosition); |
---|
1001 | |
---|
1002 | // searchRetrieveResponse/echoedSearchRetrieveResponse |
---|
1003 | if (reader.readStart(SRU_NS, |
---|
1004 | "echoedSearchRetrieveRequest", false)) { |
---|
1005 | reader.readEnd(SRU_NS, "echoedSearchRetrieveRequest", true); |
---|
1006 | } |
---|
1007 | |
---|
1008 | /* |
---|
1009 | * common error: echoedSearchRetrieveRequest in |
---|
1010 | * default namespace |
---|
1011 | */ |
---|
1012 | if (reader.readStart("", "echoedSearchRetrieveRequest", false)) { |
---|
1013 | logger.error("Element 'echoedSearchRetrieveRequest' " + |
---|
1014 | "must be in SRU namespace, but endpoint put it " + |
---|
1015 | "into default namespace"); |
---|
1016 | if (strictMode) { |
---|
1017 | throw new SRUClientException( |
---|
1018 | "Element 'echoedSearchRetrieveRequest' must " + |
---|
1019 | "be in SRU namespace, but endpoint put it " + |
---|
1020 | "into default namespace"); |
---|
1021 | } |
---|
1022 | reader.readEnd("", "echoedSearchRetrieveRequest", true); |
---|
1023 | } |
---|
1024 | |
---|
1025 | // searchRetrieveResponse/diagnostics |
---|
1026 | final List<SRUDiagnostic> diagnostics = parseDiagnostics(reader); |
---|
1027 | if (diagnostics != null) { |
---|
1028 | handler.onDiagnostics(diagnostics); |
---|
1029 | } |
---|
1030 | |
---|
1031 | // explainResponse/extraResponseData |
---|
1032 | if (reader.readStart(SRU_NS, "extraResponseData", false)) { |
---|
1033 | reader.consumeWhitespace(); |
---|
1034 | proxy.reset(reader); |
---|
1035 | try { |
---|
1036 | handler.onExtraResponseData(proxy); |
---|
1037 | } catch (XMLStreamException e) { |
---|
1038 | throw new SRUClientException("handler triggered " |
---|
1039 | + "error while parsing 'extraResponseData'", e); |
---|
1040 | } |
---|
1041 | reader.consumeWhitespace(); |
---|
1042 | reader.readEnd(SRU_NS, "extraResponseData", true); |
---|
1043 | } |
---|
1044 | |
---|
1045 | reader.readEnd(SRU_NS, "searchRetrieveResponse"); |
---|
1046 | } |
---|
1047 | } catch (XMLStreamException e) { |
---|
1048 | throw new SRUClientException(e.getMessage(), e); |
---|
1049 | } |
---|
1050 | } |
---|
1051 | |
---|
1052 | |
---|
1053 | private static SRUVersion parseVersion(SRUXMLStreamReader reader) |
---|
1054 | throws XMLStreamException, SRUClientException { |
---|
1055 | final String v = reader.readContent(SRU_NS, "version", true); |
---|
1056 | if (VERSION_1_1.equals(v)) { |
---|
1057 | return SRUVersion.VERSION_1_1; |
---|
1058 | } else if (VERSION_1_2.equals(v)) { |
---|
1059 | return SRUVersion.VERSION_1_2; |
---|
1060 | } else { |
---|
1061 | throw new SRUClientException("invalid value '" + v + |
---|
1062 | "' for version (valid values are: '" + VERSION_1_1 + |
---|
1063 | "' and '" + VERSION_1_2 + "')"); |
---|
1064 | } |
---|
1065 | } |
---|
1066 | |
---|
1067 | |
---|
1068 | private static List<SRUDiagnostic> parseDiagnostics( |
---|
1069 | SRUXMLStreamReader reader) throws XMLStreamException, |
---|
1070 | SRUClientException { |
---|
1071 | if (reader.readStart(SRU_NS, "diagnostics", false)) { |
---|
1072 | List<SRUDiagnostic> diagnostics = null; |
---|
1073 | |
---|
1074 | SRUDiagnostic diagnostic = null; |
---|
1075 | while ((diagnostic = parseDiagnostic(reader, |
---|
1076 | (diagnostics == null))) != null) { |
---|
1077 | if (diagnostics == null) { |
---|
1078 | diagnostics = new ArrayList<SRUDiagnostic>(); |
---|
1079 | } |
---|
1080 | diagnostics.add(diagnostic); |
---|
1081 | } // while |
---|
1082 | reader.readEnd(SRU_NS, "diagnostics"); |
---|
1083 | return diagnostics; |
---|
1084 | } else { |
---|
1085 | return null; |
---|
1086 | } |
---|
1087 | } |
---|
1088 | |
---|
1089 | |
---|
1090 | private static SRUDiagnostic parseDiagnostic(SRUXMLStreamReader reader, |
---|
1091 | boolean required) throws XMLStreamException, SRUClientException { |
---|
1092 | if (reader.readStart(SRU_DIAGNOSIC_NS, "diagnostic", required)) { |
---|
1093 | |
---|
1094 | // diagnostic/uri |
---|
1095 | String uri = reader.readContent(SRU_DIAGNOSIC_NS, "uri", true); |
---|
1096 | |
---|
1097 | // diagnostic/details |
---|
1098 | String details = |
---|
1099 | reader.readContent(SRU_DIAGNOSIC_NS, "details", false); |
---|
1100 | |
---|
1101 | // diagnostic/message |
---|
1102 | String message = |
---|
1103 | reader.readContent(SRU_DIAGNOSIC_NS, "message", false); |
---|
1104 | |
---|
1105 | reader.readEnd(SRU_DIAGNOSIC_NS, "diagnostic"); |
---|
1106 | |
---|
1107 | logger.debug("diagostic: uri={}, detail={}, message={}", |
---|
1108 | new Object[] { uri, details, message }); |
---|
1109 | return new SRUDiagnostic(uri, details, message); |
---|
1110 | } else { |
---|
1111 | return null; |
---|
1112 | } |
---|
1113 | } |
---|
1114 | |
---|
1115 | |
---|
1116 | private static SRURecordPacking parseRecordPacking( |
---|
1117 | SRUXMLStreamReader reader, boolean strictMode) |
---|
1118 | throws XMLStreamException, SRUClientException { |
---|
1119 | final String v = reader.readContent(SRU_NS, "recordPacking", true); |
---|
1120 | |
---|
1121 | if (RECORD_PACKING_XML.equals(v)) { |
---|
1122 | return SRURecordPacking.XML; |
---|
1123 | } else if (RECORD_PACKING_STRING.equals(v)) { |
---|
1124 | return SRURecordPacking.STRING; |
---|
1125 | } else if (!strictMode && RECORD_PACKING_XML.equalsIgnoreCase(v)) { |
---|
1126 | logger.error("invalid value '{}' for record packing, should be '{}'", |
---|
1127 | v, RECORD_PACKING_XML); |
---|
1128 | return SRURecordPacking.XML; |
---|
1129 | } else if (!strictMode && RECORD_PACKING_STRING.equalsIgnoreCase(v)) { |
---|
1130 | logger.error("invalid value '{}' for record packing, should be '{}'", |
---|
1131 | v, RECORD_PACKING_STRING); |
---|
1132 | return SRURecordPacking.STRING; |
---|
1133 | |
---|
1134 | } else { |
---|
1135 | throw new SRUClientException("invalid value '" + v + |
---|
1136 | "' for record packing (valid values are: '" + |
---|
1137 | RECORD_PACKING_XML + "' and '" + RECORD_PACKING_STRING + |
---|
1138 | "')"); |
---|
1139 | } |
---|
1140 | } |
---|
1141 | |
---|
1142 | |
---|
1143 | private SRURecordDataParser findParser(String schema) { |
---|
1144 | SRURecordDataParser parser = parsers.get(schema); |
---|
1145 | if (parser == null) { |
---|
1146 | parser = parsers.get(SRUClientConstants.RECORD_DATA_PARSER_SCHEMA_ANY); |
---|
1147 | } |
---|
1148 | return parser; |
---|
1149 | } |
---|
1150 | |
---|
1151 | |
---|
1152 | private SRUXMLStreamReader createReader(InputStream in, boolean wrap) |
---|
1153 | throws XMLStreamException { |
---|
1154 | return new SRUXMLStreamReader(in, wrap); |
---|
1155 | } |
---|
1156 | |
---|
1157 | } // class SRUSimpleClient |
---|