Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/FunctionResolver.java @ 5784:efbbfe32e9fe
Fix dateFormat for Oracle by invoking dateValue on demand
Oracle does not return a date object but a oracle.sql.TIMESTAMP
object when querying a date. We now convert to a java date
by inviking the method dateValue if it is available.
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Mon, 22 Apr 2013 16:18:16 +0200 |
parents | 619da3fa7a8b |
children |
rev | line source |
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1 package de.intevation.flys.artifacts.datacage.templating; |
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2 |
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3 import java.text.SimpleDateFormat; |
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4 import java.util.ArrayList; |
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5 import java.util.Collection; |
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6 import java.util.Date; |
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7 import java.util.List; |
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8 import java.util.Map; |
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9 |
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Fix dateFormat for Oracle by invoking dateValue on demand
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10 import java.lang.reflect.InvocationTargetException; |
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11 import java.lang.reflect.Method; |
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12 |
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13 import javax.xml.namespace.QName; |
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14 |
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15 import javax.xml.xpath.XPathFunction; |
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16 import javax.xml.xpath.XPathFunctionException; |
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17 import javax.xml.xpath.XPathFunctionResolver; |
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18 |
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19 import org.apache.log4j.Logger; |
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20 |
4594 | 21 |
22 /** Resolves functions (e.g. dc:contains) in Datacage/Meta-Data system. */ | |
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23 public class FunctionResolver |
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24 implements XPathFunctionResolver |
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25 { |
4594 | 26 /** Home logger. */ |
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27 private static Logger log = Logger.getLogger(FunctionResolver.class); |
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28 |
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29 public static final String FUNCTION_NAMESPACE_URI = "dc"; |
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30 |
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31 public static final double FAR_AWAY = 99999d; |
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32 |
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33 public static final class Entry { |
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34 |
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35 String name; |
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36 XPathFunction function; |
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37 int arity; |
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38 |
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39 public Entry() { |
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40 } |
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41 |
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42 public Entry(String name, XPathFunction function, int arity) { |
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43 this.name = name; |
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44 this.function = function; |
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45 this.arity = arity; |
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46 } |
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47 } // class Entry |
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48 |
4594 | 49 /** List of functions. */ |
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50 protected List<Entry> functions; |
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51 |
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52 protected Builder.BuildHelper buildHelper; |
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53 |
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54 |
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55 public FunctionResolver() { |
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56 this(null); |
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57 } |
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58 |
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59 public FunctionResolver(Builder.BuildHelper buildHelper) { |
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60 this.buildHelper = buildHelper; |
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61 |
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62 functions = new ArrayList<Entry>(); |
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63 |
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64 addFunction("contains", 2, new XPathFunction() { |
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65 @Override |
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66 public Object evaluate(List args) throws XPathFunctionException { |
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67 return contains(args); |
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68 } |
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69 }); |
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70 |
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71 addFunction("fromValue", 3, new XPathFunction() { |
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72 @Override |
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73 public Object evaluate(List args) throws XPathFunctionException { |
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74 return fromValue(args); |
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75 } |
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76 }); |
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77 |
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78 addFunction("toValue", 3, new XPathFunction() { |
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79 @Override |
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80 public Object evaluate(List args) throws XPathFunctionException { |
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81 return toValue(args); |
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82 } |
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83 }); |
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84 |
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85 addFunction("replace", 3, new XPathFunction() { |
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86 @Override |
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87 public Object evaluate(List args) throws XPathFunctionException { |
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88 return replace(args); |
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89 } |
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90 }); |
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91 |
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92 addFunction("has-result", 0, new XPathFunction() { |
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93 @Override |
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94 public Object evaluate(List args) throws XPathFunctionException { |
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95 return FunctionResolver.this.buildHelper.hasResult(); |
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96 } |
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97 }); |
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98 |
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99 addFunction("date-format", 2, new XPathFunction() { |
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100 @Override |
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101 public Object evaluate(List args) throws XPathFunctionException { |
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102 return dateFormat(args); |
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103 } |
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104 }); |
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105 } |
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106 |
4594 | 107 /** |
108 * Create a new function. | |
109 * @param name Name of the function. | |
110 * @param arity Number of arguments for function. | |
111 * @param function the function itself. | |
112 */ | |
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113 public void addFunction(String name, int arity, XPathFunction function) { |
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114 functions.add(new Entry(name, function, arity)); |
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115 } |
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116 |
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117 @Override |
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118 public XPathFunction resolveFunction(QName functionName, int arity) { |
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119 |
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120 if (!functionName.getNamespaceURI().equals(FUNCTION_NAMESPACE_URI)) { |
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121 return null; |
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122 } |
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123 |
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124 String name = functionName.getLocalPart(); |
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125 for (Entry entry: functions) { |
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126 if (entry.arity == arity && entry.name.equals(name)) { |
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127 return entry.function; |
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128 } |
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129 } |
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130 |
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131 return null; |
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132 } |
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133 |
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134 /** Implementation of case-ignoring dc:contains. */ |
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135 public Object contains(List args) throws XPathFunctionException { |
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136 Object haystack = args.get(0); |
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137 Object needle = args.get(1); |
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138 |
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139 if (needle instanceof String && !(haystack instanceof String)) { |
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140 needle = ((String)needle).toUpperCase(); |
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141 } |
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142 |
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143 try { |
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144 if (haystack instanceof Collection) { |
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145 return Boolean.valueOf( |
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146 ((Collection)haystack).contains(needle)); |
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147 } |
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148 |
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149 if (haystack instanceof Map) { |
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150 return Boolean.valueOf( |
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151 ((Map)haystack).containsKey(needle)); |
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152 } |
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153 |
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154 if (haystack instanceof Object []) { |
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155 for (Object straw: (Object [])haystack) { |
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156 if (straw.equals(needle)) { |
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157 return Boolean.TRUE; |
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158 } |
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159 } |
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160 } |
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161 |
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162 if (haystack instanceof String && needle instanceof String) { |
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163 String h = (String)haystack; |
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164 String n = (String)needle; |
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165 return h.contains(n); |
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166 } |
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167 |
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168 return Boolean.FALSE; |
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169 } |
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170 catch (Exception e) { |
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171 log.error(e); |
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172 throw new XPathFunctionException(e); |
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173 } |
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174 } |
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175 |
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176 /** Implementation for getting the minimum value of location or distance |
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177 * dc:fromValue. |
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178 */ |
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179 public Object fromValue(List args) throws XPathFunctionException { |
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180 Object mode = args.get(0); |
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181 Object locations = args.get(1); |
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182 Object from = args.get(2); |
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183 |
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184 if (!(mode instanceof String)){ |
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185 return -FAR_AWAY; |
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186 } |
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187 |
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188 if (mode.equals("locations")) { |
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189 if (!(locations instanceof String)) { |
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190 return -FAR_AWAY; |
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191 } |
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192 String loc = ((String)locations).replace(" ", ""); |
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193 String[] split = loc.split(","); |
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194 if (split.length < 1) { |
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195 return -FAR_AWAY; |
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196 } |
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197 try { |
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198 double min = Double.parseDouble(split[0]); |
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199 for (int i = 1; i < split.length; ++i) { |
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200 double v = Double.parseDouble(split[i]); |
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201 if (v < min) { |
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202 min = v; |
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203 } |
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204 } |
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205 return min; |
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206 } |
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207 catch (NumberFormatException nfe) { |
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208 return -FAR_AWAY; |
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209 } |
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210 } |
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211 else if (mode.equals("distance")) { |
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212 if (!(from instanceof String)) { |
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213 return -FAR_AWAY; |
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214 } |
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215 String f = (String)from; |
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216 try { |
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217 return Double.parseDouble(f); |
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218 } |
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219 catch(NumberFormatException nfe) { |
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220 return -FAR_AWAY; |
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221 } |
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222 } |
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223 else { |
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224 return -FAR_AWAY; |
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225 } |
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226 } |
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227 |
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228 /** Implementation for getting the maximum value of location or distance |
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229 * dc:toValue. |
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230 */ |
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231 public Object toValue(List args) throws XPathFunctionException { |
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232 Object mode = args.get(0); |
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233 Object locations = args.get(1); |
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234 Object to = args.get(2); |
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235 |
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236 if (!(mode instanceof String)){ |
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237 return FAR_AWAY; |
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238 } |
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239 |
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240 if (mode.equals("locations")) { |
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241 if (!(locations instanceof String)) { |
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242 return FAR_AWAY; |
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243 } |
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244 try { |
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245 String loc = ((String)locations).replace(" ", ""); |
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246 String[] split = loc.split(","); |
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247 if (split.length < 1) { |
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248 return FAR_AWAY; |
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249 } |
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250 double max = Double.parseDouble(split[0]); |
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251 for (int i = 1; i < split.length; ++i) { |
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252 double v = Double.parseDouble(split[i]); |
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253 if (v > max) { |
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254 max = v; |
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255 } |
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256 } |
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257 return max; |
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258 } |
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259 catch (NumberFormatException nfe) { |
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260 return FAR_AWAY; |
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261 } |
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262 } |
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263 else if (mode.equals("distance")) { |
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264 if (!(to instanceof String)) { |
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265 return FAR_AWAY; |
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266 } |
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267 else { |
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268 String t = (String)to; |
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269 try { |
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270 return Double.parseDouble(t); |
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271 } |
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272 catch(NumberFormatException nfe) { |
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273 return FAR_AWAY; |
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274 } |
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275 } |
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276 } |
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277 else { |
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278 return FAR_AWAY; |
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279 } |
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280 } |
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281 |
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282 /** Implementation for doing a string replace |
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283 * dc:replace |
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284 */ |
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285 public Object replace(List args) throws XPathFunctionException { |
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286 Object haystack = args.get(0); |
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287 Object needle = args.get(1); |
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288 Object replacement = args.get(2); |
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289 |
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290 if (needle instanceof String && |
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291 haystack instanceof String && |
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292 replacement instanceof String) { |
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293 return ((String)haystack).replace( |
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294 (String)needle, (String)replacement); |
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295 } else { |
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296 return haystack; |
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297 } |
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298 } |
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299 |
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300 public Object dateFormat(List args) throws XPathFunctionException { |
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301 Object pattern = args.get(0); |
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302 Object date = args.get(1); |
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303 |
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304 try { |
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305 // Oracle does not return a date object but an oracle.sql.TIMESTAMP |
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306 Method meth = date.getClass().getMethod("dateValue", new Class[] {}); |
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307 date = meth.invoke(date, new Object [] {}); |
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308 } catch (IllegalArgumentException e) { |
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309 } catch (IllegalAccessException e) { |
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310 } catch (InvocationTargetException e) { |
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311 } catch (NoSuchMethodException e) { |
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312 } |
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313 if (pattern instanceof String && date instanceof Date) { |
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314 try { |
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315 // TODO: Take locale into account. |
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316 return new SimpleDateFormat((String)pattern).format((Date)date); |
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317 } |
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318 catch (IllegalArgumentException iae) { |
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319 throw new XPathFunctionException(iae); |
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320 } |
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321 } |
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322 return ""; |
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323 } |
998
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324 } |
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325 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |