Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/FunctionResolver.java @ 5381:d6782d0c7472
merged.
author | Raimund Renkert <rrenkert@intevation.de> |
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date | Fri, 22 Mar 2013 11:56:37 +0100 |
parents | 8c65acf01adc |
children | ba489a16f4d8 |
rev | line source |
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Datacage: Moved templating in a better suited package.
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1 package de.intevation.flys.artifacts.datacage.templating; |
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2 |
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3 import java.util.ArrayList; |
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4 import java.util.Collection; |
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5 import java.util.List; |
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6 import java.util.Map; |
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7 |
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8 import javax.xml.namespace.QName; |
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9 |
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10 import javax.xml.xpath.XPathFunction; |
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11 import javax.xml.xpath.XPathFunctionException; |
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12 import javax.xml.xpath.XPathFunctionResolver; |
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13 |
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14 import org.apache.log4j.Logger; |
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15 |
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17 /** Resolves functions (e.g. dc:contains) in Datacage/Meta-Data system. */ | |
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18 public class FunctionResolver |
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19 implements XPathFunctionResolver |
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20 { |
4594 | 21 /** Home logger. */ |
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22 private static Logger log = Logger.getLogger(FunctionResolver.class); |
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23 |
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24 public static final String FUNCTION_NAMESPACE_URI = "dc"; |
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25 |
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26 public static final class Entry { |
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27 |
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28 String name; |
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29 XPathFunction function; |
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30 int arity; |
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31 |
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32 public Entry() { |
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33 } |
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34 |
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35 public Entry(String name, XPathFunction function, int arity) { |
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36 this.name = name; |
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37 this.function = function; |
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38 this.arity = arity; |
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39 } |
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40 } // class Entry |
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41 |
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42 public static final FunctionResolver FUNCTIONS = new FunctionResolver(); |
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43 |
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44 static { |
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45 /** Implementation of case-ignoring dc:contains. */ |
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46 FUNCTIONS.addFunction("contains", 2, new XPathFunction() { |
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47 @Override |
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48 public Object evaluate(List args) throws XPathFunctionException { |
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49 Object haystack = args.get(0); |
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50 Object needle = args.get(1); |
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51 |
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52 if (needle instanceof String) { |
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53 needle = ((String)needle).toUpperCase(); |
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54 } |
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55 |
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56 try { |
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57 if (haystack instanceof Collection) { |
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58 return Boolean.valueOf( |
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59 ((Collection)haystack).contains(needle)); |
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60 } |
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61 |
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62 if (haystack instanceof Map) { |
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63 return Boolean.valueOf( |
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64 ((Map)haystack).containsKey(needle)); |
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65 } |
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66 |
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67 if (haystack instanceof Object []) { |
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68 for (Object straw: (Object [])haystack) { |
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69 if (straw.equals(needle)) { |
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70 return Boolean.TRUE; |
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71 } |
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72 } |
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73 } |
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74 |
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75 return Boolean.FALSE; |
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76 } |
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77 catch (Exception e) { |
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78 log.error(e); |
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79 throw new XPathFunctionException(e); |
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80 } |
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81 } |
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82 }); |
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83 } |
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84 |
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85 static { |
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86 /** Implementation for getting the minimum value of location or distance |
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87 * dc:fromValue. */ |
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88 FUNCTIONS.addFunction("fromValue", 3, new XPathFunction() { |
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89 @Override |
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90 public Object evaluate(List args) throws XPathFunctionException { |
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91 Object mode = args.get(0); |
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92 Object locations = args.get(1); |
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93 Object from = args.get(2); |
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94 |
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95 if (!(mode instanceof String)){ |
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96 return -99999d; |
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97 } |
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98 |
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99 if (mode.equals("locations")) { |
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100 if (!(locations instanceof String)) { |
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101 return -99999d; |
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102 } |
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103 String loc = ((String)locations).replace(" ", ""); |
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104 String[] split = loc.split(","); |
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105 if (split.length < 1) { |
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106 return -99999d; |
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107 } |
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108 try { |
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109 double min = Double.parseDouble(split[0]); |
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110 for (int i = 1; i < split.length; ++i) { |
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111 double v = Double.parseDouble(split[i]); |
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112 if (v < min) { |
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113 min = v; |
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114 } |
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115 } |
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116 return min; |
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117 } |
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118 catch (NumberFormatException nfe) { |
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119 return -99999d; |
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120 } |
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121 } |
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122 else if (mode.equals("distance")) { |
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123 if (!(from instanceof String)) { |
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124 return -99999d; |
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125 } |
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126 String f = (String)from; |
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127 try { |
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128 return Double.parseDouble(f); |
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129 } |
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130 catch(NumberFormatException nfe) { |
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131 return -99999d; |
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132 } |
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133 } |
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134 else { |
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135 return -99999d; |
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136 } |
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137 } |
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138 }); |
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139 } |
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140 |
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141 static { |
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142 /** Implementation for getting the maximum value of location or distance |
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143 * dc:toValue. */ |
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144 FUNCTIONS.addFunction("toValue", 3, new XPathFunction() { |
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145 @Override |
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146 public Object evaluate(List args) throws XPathFunctionException { |
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147 Object mode = args.get(0); |
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148 Object locations = args.get(1); |
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149 Object to = args.get(2); |
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150 |
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151 if (!(mode instanceof String)){ |
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152 return 99999d; |
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153 } |
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154 |
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155 if (mode.equals("locations")) { |
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156 if (!(locations instanceof String)) { |
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157 return 99999d; |
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158 } |
4926
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159 try { |
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160 String loc = ((String)locations).replace(" ", ""); |
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161 String[] split = loc.split(","); |
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162 if (split.length < 1) { |
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163 return 99999d; |
4926
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164 } |
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165 double max = Double.parseDouble(split[0]); |
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166 for (int i = 1; i < split.length; ++i) { |
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167 double v = Double.parseDouble(split[i]); |
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168 if (v > max) { |
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169 max = v; |
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170 } |
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171 } |
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172 return max; |
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173 } |
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174 catch (NumberFormatException nfe) { |
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175 return 99999d; |
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176 } |
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177 } |
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178 else if (mode.equals("distance")) { |
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179 if (!(to instanceof String)) { |
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180 return 99999d; |
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181 } |
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182 else { |
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183 String t = (String)to; |
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184 try { |
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185 return Double.parseDouble(t); |
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186 } |
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187 catch(NumberFormatException nfe) { |
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188 return 99999d; |
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189 } |
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190 } |
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191 } |
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192 else { |
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193 return 99999d; |
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194 } |
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195 } |
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196 }); |
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197 } |
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198 |
4594 | 199 /** List of functions. */ |
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200 protected List<Entry> functions; |
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201 |
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202 public FunctionResolver() { |
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203 functions = new ArrayList<Entry>(); |
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204 } |
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205 |
4594 | 206 /** |
207 * Create a new function. | |
208 * @param name Name of the function. | |
209 * @param arity Number of arguments for function. | |
210 * @param function the function itself. | |
211 */ | |
998
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212 public void addFunction(String name, int arity, XPathFunction function) { |
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213 functions.add(new Entry(name, function, arity)); |
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214 } |
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215 |
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216 @Override |
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217 public XPathFunction resolveFunction(QName functionName, int arity) { |
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218 |
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219 if (!functionName.getNamespaceURI().equals(FUNCTION_NAMESPACE_URI)) { |
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220 return null; |
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221 } |
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222 |
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223 String name = functionName.getLocalPart(); |
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224 for (Entry entry: functions) { |
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225 if (entry.arity == arity && entry.name.equals(name)) { |
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226 return entry.function; |
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227 } |
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228 } |
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229 |
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230 return null; |
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231 } |
b81626b10cb7
Datacage: Moved templating in a better suited package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
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232 } |
b81626b10cb7
Datacage: Moved templating in a better suited package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
233 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |