Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/FunctionResolver.java @ 6933:468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Tue, 27 Aug 2013 19:14:12 +0200 |
parents | 00aa1bc72a65 |
children | 1dff8e71c4d6 |
rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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9 package org.dive4elements.river.artifacts.datacage.templating; |
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10 |
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11 import java.text.SimpleDateFormat; |
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12 import java.util.Collection; |
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13 import java.util.Collections; |
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14 import java.util.Date; |
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15 import java.util.List; |
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16 import java.util.Map; |
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17 import java.util.HashMap; |
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18 import java.util.Set; |
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19 |
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20 import java.lang.reflect.InvocationTargetException; |
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21 import java.lang.reflect.Method; |
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22 |
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23 import javax.xml.namespace.QName; |
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24 |
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25 import javax.xml.xpath.XPathFunction; |
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26 import javax.xml.xpath.XPathFunctionException; |
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27 import javax.xml.xpath.XPathFunctionResolver; |
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28 |
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29 import org.apache.log4j.Logger; |
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30 import org.dive4elements.artifactdatabase.transition.TransitionEngine; |
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31 import org.dive4elements.artifacts.GlobalContext; |
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32 import org.dive4elements.river.artifacts.context.RiverContext; |
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33 import org.dive4elements.river.artifacts.context.RiverContextFactory; |
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34 |
4594 | 35 |
36 /** Resolves functions (e.g. dc:contains) in Datacage/Meta-Data system. */ | |
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37 public class FunctionResolver |
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38 implements XPathFunctionResolver |
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39 { |
4594 | 40 /** Home logger. */ |
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41 private static Logger log = Logger.getLogger(FunctionResolver.class); |
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42 |
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43 public static final String FUNCTION_NAMESPACE_URI = "dc"; |
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44 |
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45 public static final double FAR_AWAY = 99999d; |
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46 |
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47 protected static final class Entry { |
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48 |
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49 Entry next; |
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50 XPathFunction function; |
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51 int arity; |
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52 |
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53 public Entry(Entry next, XPathFunction function, int arity) { |
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54 this.next = next; |
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55 this.function = function; |
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56 this.arity = arity; |
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57 } |
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58 |
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59 XPathFunction find(int arity) { |
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60 Entry current = this; |
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61 while (current != null) { |
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62 if (current.arity == arity) { |
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63 return current.function; |
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64 } |
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65 current = current.next; |
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66 } |
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67 return null; |
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68 } |
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69 } // class Entry |
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70 |
4594 | 71 /** List of functions. */ |
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72 protected Map<String, Entry> functions; |
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73 |
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74 protected Builder.BuildHelper buildHelper; |
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75 |
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76 |
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77 public FunctionResolver() { |
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78 this(null); |
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79 } |
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80 |
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81 public FunctionResolver(Builder.BuildHelper buildHelper) { |
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82 this.buildHelper = buildHelper; |
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83 |
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84 functions = new HashMap<String, Entry>(); |
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85 |
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86 addFunction("contains", 2, new XPathFunction() { |
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87 @Override |
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88 public Object evaluate(List args) throws XPathFunctionException { |
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89 return contains(args); |
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90 } |
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91 }); |
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92 |
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93 addFunction("fromValue", 3, new XPathFunction() { |
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94 @Override |
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95 public Object evaluate(List args) throws XPathFunctionException { |
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96 return fromValue(args); |
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97 } |
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98 }); |
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99 |
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100 addFunction("toValue", 3, new XPathFunction() { |
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101 @Override |
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102 public Object evaluate(List args) throws XPathFunctionException { |
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103 return toValue(args); |
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104 } |
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105 }); |
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106 |
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107 addFunction("replace", 3, new XPathFunction() { |
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108 @Override |
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109 public Object evaluate(List args) throws XPathFunctionException { |
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110 return replace(args); |
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111 } |
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112 }); |
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113 |
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114 addFunction("replace-all", 3, new XPathFunction() { |
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115 @Override |
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116 public Object evaluate(List args) throws XPathFunctionException { |
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117 return replaceAll(args); |
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118 } |
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119 }); |
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120 |
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121 addFunction("has-result", 0, new XPathFunction() { |
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122 @Override |
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123 public Object evaluate(List args) throws XPathFunctionException { |
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124 return FunctionResolver.this.buildHelper.hasResult(); |
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125 } |
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126 }); |
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127 |
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128 addFunction("group-key", 0, new XPathFunction() { |
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129 @Override |
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130 public Object evaluate(List args) throws XPathFunctionException { |
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131 return FunctionResolver.this.buildHelper.getGroupKey(); |
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132 } |
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133 }); |
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134 |
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135 addFunction("date-format", 2, new XPathFunction() { |
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136 @Override |
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137 public Object evaluate(List args) throws XPathFunctionException { |
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138 return dateFormat(args); |
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139 } |
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140 }); |
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141 |
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142 addFunction("dump-variables", 0, new XPathFunction() { |
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143 @Override |
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144 public Object evaluate(List args) throws XPathFunctionException { |
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145 return FunctionResolver.this.buildHelper.frames.dump(); |
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146 } |
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147 }); |
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148 |
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149 addFunction("get", 1, new XPathFunction() { |
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150 @Override |
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151 public Object evaluate(List args) throws XPathFunctionException { |
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152 Object o = args.get(0); |
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153 if (o instanceof String) { |
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154 return FunctionResolver.this.buildHelper.frames.getNull( |
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155 (String)o, StackFrames.NULL); |
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156 } |
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157 return StackFrames.NULL; |
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158 } |
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159 }); |
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160 |
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161 addFunction("all-state-successors", 2, new XPathFunction() { |
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162 @Override |
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163 public Object evaluate(List args) throws XPathFunctionException { |
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164 Object artifactName = args.get(0); |
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165 Object stateId = args.get(1); |
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166 |
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167 return artifactName instanceof String |
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168 && stateId instanceof String |
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169 ? allStateSuccessors((String)artifactName, (String)stateId) |
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170 : Collections.<String>emptySet(); |
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171 } |
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172 }); |
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173 } |
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174 |
4594 | 175 /** |
176 * Create a new function. | |
177 * @param name Name of the function. | |
178 * @param arity Number of arguments for function. | |
179 * @param function the function itself. | |
180 */ | |
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181 public void addFunction(String name, int arity, XPathFunction function) { |
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182 Entry entry = functions.get(name); |
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183 if (entry == null) { |
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184 entry = new Entry(null, function, arity); |
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185 functions.put(name, entry); |
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186 } |
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187 else { |
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188 Entry newEntry = new Entry(entry.next, function, arity); |
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189 entry.next = newEntry; |
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190 } |
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191 } |
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192 |
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193 @Override |
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194 public XPathFunction resolveFunction(QName functionName, int arity) { |
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195 |
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196 if (!functionName.getNamespaceURI().equals(FUNCTION_NAMESPACE_URI)) { |
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197 return null; |
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198 } |
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199 |
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200 Entry entry = functions.get(functionName.getLocalPart()); |
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201 return entry != null |
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202 ? entry.find(arity) |
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203 : null; |
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204 } |
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205 |
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206 /** Implementation of case-ignoring dc:contains. */ |
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207 public Object contains(List args) throws XPathFunctionException { |
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208 Object haystack = args.get(0); |
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209 Object needle = args.get(1); |
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210 |
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211 if (needle instanceof String && !(haystack instanceof String)) { |
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212 needle = ((String)needle).toUpperCase(); |
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213 } |
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214 |
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215 try { |
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216 if (haystack instanceof Collection) { |
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217 return Boolean.valueOf( |
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218 ((Collection)haystack).contains(needle)); |
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219 } |
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220 |
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221 if (haystack instanceof Map) { |
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222 return Boolean.valueOf( |
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223 ((Map)haystack).containsKey(needle)); |
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224 } |
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225 |
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226 if (haystack instanceof Object []) { |
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227 for (Object straw: (Object [])haystack) { |
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228 if (straw.equals(needle)) { |
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229 return Boolean.TRUE; |
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230 } |
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231 } |
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232 } |
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233 |
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234 if (haystack instanceof String && needle instanceof String) { |
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235 String h = (String)haystack; |
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236 String n = (String)needle; |
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237 return h.contains(n); |
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238 } |
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239 |
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240 return Boolean.FALSE; |
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241 } |
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242 catch (Exception e) { |
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243 log.error(e); |
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244 throw new XPathFunctionException(e); |
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245 } |
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246 } |
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247 |
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248 /** Implementation for getting the minimum value of location or distance |
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249 * dc:fromValue. |
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250 */ |
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251 public Object fromValue(List args) throws XPathFunctionException { |
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252 Object mode = args.get(0); |
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253 Object locations = args.get(1); |
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254 Object from = args.get(2); |
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255 |
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256 if ((mode instanceof String && mode.equals("location")) || |
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257 (locations instanceof String && !((String)locations).isEmpty())) { |
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258 if (!(locations instanceof String)) { |
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259 return -FAR_AWAY; |
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260 } |
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261 String loc = ((String)locations).replace(" ", ""); |
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262 String[] split = loc.split(","); |
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263 if (split.length < 1) { |
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264 return -FAR_AWAY; |
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265 } |
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266 try { |
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267 double min = Double.parseDouble(split[0]); |
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268 for (int i = 1; i < split.length; ++i) { |
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269 double v = Double.parseDouble(split[i]); |
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270 if (v < min) { |
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271 min = v; |
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272 } |
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273 } |
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274 return min; |
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275 } |
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276 catch (NumberFormatException nfe) { |
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277 return -FAR_AWAY; |
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278 } |
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279 } |
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280 else { |
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281 if (!(from instanceof String)) { |
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282 return -FAR_AWAY; |
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283 } |
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284 String f = (String)from; |
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285 try { |
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286 return Double.parseDouble(f); |
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287 } |
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288 catch(NumberFormatException nfe) { |
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289 return -FAR_AWAY; |
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290 } |
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291 } |
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292 } |
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293 |
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294 /** Implementation for getting the maximum value of location or distance |
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295 * dc:toValue. |
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296 */ |
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297 public Object toValue(List args) throws XPathFunctionException { |
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298 Object mode = args.get(0); |
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299 Object locations = args.get(1); |
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300 Object to = args.get(2); |
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301 |
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302 if ((mode instanceof String && mode.equals("location")) || |
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303 (locations instanceof String && !((String)locations).isEmpty())) { |
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304 if (!(locations instanceof String)) { |
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305 return FAR_AWAY; |
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306 } |
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307 try { |
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308 String loc = ((String)locations).replace(" ", ""); |
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309 String[] split = loc.split(","); |
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310 if (split.length < 1) { |
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311 return FAR_AWAY; |
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312 } |
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313 double max = Double.parseDouble(split[0]); |
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314 for (int i = 1; i < split.length; ++i) { |
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315 double v = Double.parseDouble(split[i]); |
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316 if (v > max) { |
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317 max = v; |
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318 } |
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319 } |
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320 return max; |
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321 } |
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322 catch (NumberFormatException nfe) { |
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323 return FAR_AWAY; |
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324 } |
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325 } |
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326 else { |
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327 if (!(to instanceof String)) { |
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328 return FAR_AWAY; |
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329 } |
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330 else { |
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331 String t = (String)to; |
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332 try { |
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333 return Double.parseDouble(t); |
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334 } |
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335 catch (NumberFormatException nfe) { |
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336 return FAR_AWAY; |
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337 } |
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338 } |
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339 } |
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340 } |
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341 |
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342 /** Implementation for doing a string replace |
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343 * dc:replace |
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344 */ |
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345 public Object replace(List args) throws XPathFunctionException { |
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346 Object haystack = args.get(0); |
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347 Object needle = args.get(1); |
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348 Object replacement = args.get(2); |
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349 |
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350 if (needle instanceof String |
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351 && haystack instanceof String |
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352 && replacement instanceof String) { |
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353 return ((String)haystack).replace( |
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354 (String)needle, (String)replacement); |
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355 } |
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356 return haystack; |
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357 } |
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358 |
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359 /** Implementation for doing a string replace |
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360 * dc:replace-all |
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361 */ |
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362 public Object replaceAll(List args) throws XPathFunctionException { |
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363 Object haystack = args.get(0); |
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364 Object needle = args.get(1); |
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365 Object replacement = args.get(2); |
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366 |
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367 if (needle instanceof String |
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Datacage: Added function dc:replace-all(haystack, needle, replacement) to do regular expression replacements. Mapped to Java's String haystack.replaceAll(needle, replacement).
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368 && haystack instanceof String |
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Datacage: Added function dc:replace-all(haystack, needle, replacement) to do regular expression replacements. Mapped to Java's String haystack.replaceAll(needle, replacement).
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369 && replacement instanceof String) { |
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Datacage: Added function dc:replace-all(haystack, needle, replacement) to do regular expression replacements. Mapped to Java's String haystack.replaceAll(needle, replacement).
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370 return ((String)haystack).replaceAll( |
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Datacage: Added function dc:replace-all(haystack, needle, replacement) to do regular expression replacements. Mapped to Java's String haystack.replaceAll(needle, replacement).
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371 (String)needle, (String)replacement); |
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372 } |
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Datacage: Added function dc:replace-all(haystack, needle, replacement) to do regular expression replacements. Mapped to Java's String haystack.replaceAll(needle, replacement).
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373 return haystack; |
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374 } |
5608
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Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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375 |
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376 public Object dateFormat(List args) throws XPathFunctionException { |
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377 Object pattern = args.get(0); |
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378 Object date = args.get(1); |
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379 |
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Fix dateFormat for Oracle by invoking dateValue on demand
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|
380 try { |
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Fix dateFormat for Oracle by invoking dateValue on demand
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|
381 // Oracle does not return a date object but an oracle.sql.TIMESTAMP |
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382 Method meth = date.getClass().getMethod("dateValue", new Class[] {}); |
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383 date = meth.invoke(date, new Object [] {}); |
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384 } catch (IllegalArgumentException e) { |
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385 } catch (IllegalAccessException e) { |
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386 } catch (InvocationTargetException e) { |
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387 } catch (NoSuchMethodException e) { |
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388 } |
5608
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389 if (pattern instanceof String && date instanceof Date) { |
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Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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390 try { |
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Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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391 // TODO: Take locale into account. |
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Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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392 return new SimpleDateFormat((String)pattern).format((Date)date); |
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Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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393 } |
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Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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394 catch (IllegalArgumentException iae) { |
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Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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395 throw new XPathFunctionException(iae); |
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Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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|
396 } |
62513c9183ba
Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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|
397 } |
62513c9183ba
Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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398 return ""; |
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Datacage: Added dc:date-format to function resolver. Args: dc:date-format(pattern, date)
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|
399 } |
6933
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
6448
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400 |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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401 public Set<String> allStateSuccessors(String artifactName, String stateId) { |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
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402 GlobalContext gc = RiverContextFactory.getGlobalContext(); |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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403 if (gc == null) { |
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Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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404 return Collections.<String>emptySet(); |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
6448
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405 } |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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406 Object o = gc.get(RiverContext.TRANSITION_ENGINE_KEY); |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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407 if (o instanceof TransitionEngine) { |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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408 TransitionEngine te = (TransitionEngine)o; |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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409 return te.allRecursiveSuccessorStateIds(artifactName, stateId); |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
6448
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410 } |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
6448
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411 return Collections.<String>emptySet(); |
468d9ebda4ce
Datacage: Add dc:all-state-successors() to enable predicates like dc:contains(dc:all-state-successors($artifact-name, $current-state-id), 'state.winfo.calculation_mode') which recursively collects all successor state ids an check for containment.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
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412 } |
998
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Datacage: Moved templating in a better suited package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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413 } |
b81626b10cb7
Datacage: Moved templating in a better suited package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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414 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |