svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.plugin / org.gvsig.app / org.gvsig.app.mainplugin / src / main / java / org / gvsig / app / project / ProjectSymbolTable.java @ 43999
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1 | 43987 | jjdelcerro | package org.gvsig.app.project; |
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2 | |||
3 | import java.io.File; |
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4 | import java.io.FileInputStream; |
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5 | import java.util.HashMap; |
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6 | 43997 | jjdelcerro | import java.util.Iterator; |
7 | 43987 | jjdelcerro | import java.util.Map; |
8 | import java.util.Properties; |
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9 | import org.apache.commons.io.IOUtils; |
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10 | import org.apache.commons.lang3.Range; |
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11 | 43997 | jjdelcerro | import org.cresques.cts.IProjection; |
12 | import org.gvsig.app.project.documents.Document; |
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13 | 43987 | jjdelcerro | import org.gvsig.app.project.documents.view.ViewDocument; |
14 | import org.gvsig.app.project.documents.view.ViewManager; |
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15 | import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
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16 | import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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17 | import org.gvsig.expressionevaluator.Interpreter; |
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18 | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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19 | import org.gvsig.expressionevaluator.spi.AbstractSymbolTable; |
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20 | 43997 | jjdelcerro | import org.gvsig.fmap.crs.CRSFactory; |
21 | 43987 | jjdelcerro | import org.gvsig.fmap.dal.feature.Feature; |
22 | import org.gvsig.fmap.dal.feature.FeatureQuery; |
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23 | import org.gvsig.fmap.dal.feature.FeatureSelection; |
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24 | import org.gvsig.fmap.dal.feature.FeatureSet; |
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25 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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26 | 43997 | jjdelcerro | import org.gvsig.fmap.geom.Geometry; |
27 | import org.gvsig.fmap.mapcontext.MapContext; |
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28 | 43987 | jjdelcerro | import org.gvsig.fmap.mapcontext.layers.FLayer; |
29 | import org.gvsig.fmap.mapcontext.layers.vectorial.FLyrVect; |
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30 | 43997 | jjdelcerro | import org.gvsig.fmap.mapcontrol.AreaAndPerimeterCalculator; |
31 | 43987 | jjdelcerro | |
32 | /**
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33 | *
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34 | * @author jjdelcerro
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35 | */
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36 | @SuppressWarnings("UseSpecificCatch") |
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37 | public class ProjectSymbolTable extends AbstractSymbolTable { |
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38 | |||
39 | private abstract class CachedValue<T> { |
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40 | |||
41 | T value = null;
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42 | long lastAccess = 0; |
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43 | |||
44 | protected abstract void reload(); |
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45 | |||
46 | public boolean isExpired() { |
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47 | long now = System.currentTimeMillis(); |
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48 | return now - lastAccess > 3000; |
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49 | } |
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50 | |||
51 | public T get() {
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52 | if (isExpired()) {
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53 | reload(); |
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54 | } |
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55 | lastAccess = System.currentTimeMillis();
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56 | return value;
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57 | } |
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58 | } |
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59 | |||
60 | private class ProjectValue extends CachedValue<Project> { |
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61 | |||
62 | @Override
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63 | protected void reload() { |
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64 | value = ProjectManager.getInstance().getCurrentProject(); |
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65 | } |
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66 | |||
67 | } |
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68 | |||
69 | private class PropertiesValue extends CachedValue<Map<File, Properties>> { |
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70 | |||
71 | @Override
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72 | protected void reload() { |
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73 | value = new HashMap<>(); |
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74 | } |
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75 | } |
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76 | |||
77 | private class CurrentProjectFunction extends AbstractFunction { |
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78 | |||
79 | public CurrentProjectFunction() {
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80 | super(
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81 | "Project",
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82 | "project",
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83 | Range.is(0),
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84 | "Access to the current project loaded in gvSIG desktop.\n",
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85 | "project()",
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86 | null,
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87 | "Project"
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88 | ); |
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89 | } |
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90 | |||
91 | @Override
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92 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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93 | return currentProject.get();
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94 | } |
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95 | |||
96 | } |
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97 | |||
98 | private class FirstSelectedFeatureFunction extends AbstractFunction { |
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99 | |||
100 | public FirstSelectedFeatureFunction() {
|
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101 | super(
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102 | "Project",
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103 | "firstSelectedFeature",
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104 | Range.between(3, 4), |
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105 | "Access to the first selected feature of the layer, and "
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106 | + "return the value of the attribute.",
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107 | "firstSelectedFeature({{view}}, layer, attribute, defaulValue)",
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108 | new String[]{ |
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109 | "view - String value with the name of a view",
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110 | "layer - String value with the name of a layer in the indicated view",
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111 | "attribute - String value with the name of the attribute in the indicated layer",
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112 | "defaultValue - Optional. Value to use if the indicated "
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113 | + "attribute can not be accessed. For example, if the "
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114 | + "view or layer does not exist, or it does not have "
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115 | + "selected elements."
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116 | }, |
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117 | "Object"
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118 | ); |
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119 | } |
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120 | |||
121 | @Override
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122 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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123 | Object defaultValue = null; |
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124 | String viewName = getStr(args, 0); |
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125 | String layerName = getStr(args, 1); |
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126 | String attrName = getStr(args, 2); |
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127 | if (args.length == 4) { |
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128 | defaultValue = getObject(args, 3);
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129 | } |
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130 | try {
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131 | Project project = currentProject.get(); |
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132 | ViewDocument view = (ViewDocument) project.getDocument(viewName, ViewManager.TYPENAME); |
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133 | if (view == null) { |
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134 | return defaultValue;
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135 | } |
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136 | FLayer layer = view.getLayer(layerName); |
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137 | if (!(layer instanceof FLyrVect)) { |
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138 | return defaultValue;
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139 | } |
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140 | FeatureSelection selection = ((FLyrVect) layer).getFeatureStore().getFeatureSelection(); |
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141 | if (selection == null || selection.isEmpty()) { |
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142 | return defaultValue;
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143 | } |
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144 | Feature feature = selection.first(); |
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145 | if (feature == null) { |
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146 | return defaultValue;
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147 | } |
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148 | return feature.get(attrName);
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149 | } catch (Exception ex) { |
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150 | return defaultValue;
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151 | } |
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152 | } |
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153 | |||
154 | } |
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155 | |||
156 | private class FirstFeatureFunction extends AbstractFunction { |
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157 | |||
158 | public FirstFeatureFunction() {
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159 | super(
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160 | "Project",
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161 | "firstFeature",
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162 | Range.between(3, 6), |
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163 | "Access to the first feature of the layer, and "
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164 | + "return the value of the attribute.",
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165 | "firstFeature({{view}}, layer, attribute, filter, order, defaulValue)",
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166 | new String[]{ |
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167 | "view - String value with the name of a view",
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168 | "layer - String value with the name of a layer in the indicated view",
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169 | "attribute - String value with the name of the attribute in the indicated layer",
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170 | "filter - Optional. String value with a filter expression",
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171 | "order - Optional. String value with the order. must be a string with the names of separate fields with commas",
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172 | "defaultValue - Optional. Value to use if the indicated "
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173 | + "attribute can not be accessed. For example, if the "
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174 | + "view or layer does not exist."
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175 | }, |
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176 | "Object"
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177 | ); |
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178 | } |
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179 | |||
180 | @Override
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181 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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182 | Object defaultValue = null; |
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183 | String filter = null; |
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184 | String order = null; |
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185 | String viewName = getStr(args, 0); |
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186 | String layerName = getStr(args, 1); |
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187 | String attrName = getStr(args, 2); |
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188 | 43997 | jjdelcerro | switch (args.length) {
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189 | 43987 | jjdelcerro | case 4: |
190 | filter = getStr(args, 3);
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191 | break;
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192 | case 5: |
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193 | filter = getStr(args, 3);
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194 | order = getStr(args, 4);
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195 | break;
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196 | case 6: |
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197 | filter = getStr(args, 3);
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198 | order = getStr(args, 4);
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199 | defaultValue = getObject(args, 6);
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200 | break;
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201 | } |
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202 | try {
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203 | Project project = currentProject.get(); |
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204 | ViewDocument view = (ViewDocument) project.getDocument(viewName, ViewManager.TYPENAME); |
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205 | if (view == null) { |
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206 | return defaultValue;
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207 | } |
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208 | FLayer layer = view.getLayer(layerName); |
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209 | if (!(layer instanceof FLyrVect)) { |
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210 | return defaultValue;
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211 | } |
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212 | FeatureStore store = ((FLyrVect) layer).getFeatureStore(); |
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213 | FeatureSet set; |
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214 | 43997 | jjdelcerro | if (filter == null && order == null) { |
215 | 43987 | jjdelcerro | set = store.getFeatureSet(); |
216 | } else {
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217 | FeatureQuery query = store.createFeatureQuery(); |
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218 | 43997 | jjdelcerro | if (filter != null) { |
219 | 43987 | jjdelcerro | query.addFilter(filter); |
220 | } |
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221 | 43997 | jjdelcerro | if (order != null) { |
222 | 43987 | jjdelcerro | query.getOrder().add(order); |
223 | } |
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224 | set = store.getFeatureSet(query); |
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225 | } |
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226 | Feature feature = set.first(); |
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227 | if (feature == null) { |
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228 | return defaultValue;
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229 | } |
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230 | return feature.get(attrName);
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231 | } catch (Exception ex) { |
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232 | return defaultValue;
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233 | } |
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234 | } |
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235 | |||
236 | } |
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237 | |||
238 | private class ViewFunction extends AbstractFunction { |
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239 | |||
240 | public ViewFunction() {
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241 | super(
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242 | "Project",
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243 | "view",
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244 | Range.is(1),
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245 | "Access to the indicated view",
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246 | "view({{viewName}})",
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247 | new String[]{ |
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248 | "view - String value with the name of a view"
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249 | }, |
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250 | "DocumentView"
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251 | ); |
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252 | } |
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253 | |||
254 | @Override
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255 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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256 | String viewName = getStr(args, 0); |
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257 | Project project = currentProject.get(); |
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258 | ViewDocument view = (ViewDocument) project.getDocument(viewName, ViewManager.TYPENAME); |
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259 | return view;
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260 | } |
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261 | |||
262 | } |
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263 | |||
264 | 43997 | jjdelcerro | private class AreaFunction extends AbstractFunction { |
265 | |||
266 | public AreaFunction() {
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267 | super(
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268 | "Project",
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269 | "Area",
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270 | 43999 | jjdelcerro | Range.between(2,3), |
271 | 43997 | jjdelcerro | "Calculate the area of the geometry in the indicated units",
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272 | 43999 | jjdelcerro | "Area({{geometry}}, \"m\")",
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273 | 43997 | jjdelcerro | new String[]{ |
274 | "geometry - Geometry",
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275 | 43999 | jjdelcerro | "Projection - Optional. Projection of the geometry or a string with the projection name",
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276 | 43997 | jjdelcerro | "units - String value with the name the units to use"
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277 | }, |
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278 | "Double"
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279 | ); |
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280 | } |
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281 | |||
282 | @Override
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283 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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284 | 43999 | jjdelcerro | int units = 0; |
285 | IProjection proj = null;
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286 | 43997 | jjdelcerro | Geometry geom = getGeom(args, 0);
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287 | 43999 | jjdelcerro | switch( args.length ) {
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288 | case 2: |
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289 | units = getUnits(args, 1);
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290 | break;
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291 | case 3: |
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292 | proj = getProjection(args, 1);
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293 | units = getUnits(args, 2);
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294 | break;
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295 | } |
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296 | 43997 | jjdelcerro | if (proj == null) { |
297 | proj = geom.getProjection(); |
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298 | } |
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299 | AreaAndPerimeterCalculator calculator = new AreaAndPerimeterCalculator();
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300 | double area = calculator.area(geom, proj, units);
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301 | return area;
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302 | } |
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303 | } |
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304 | |||
305 | private class PerimeterFunction extends AbstractFunction { |
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306 | |||
307 | public PerimeterFunction() {
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308 | super(
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309 | "Project",
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310 | "Perimeter",
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311 | 43999 | jjdelcerro | Range.between(2,3), |
312 | 43997 | jjdelcerro | "Calculate the perimeter of the geometry in the indicated units",
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313 | 43999 | jjdelcerro | "Perimeter({{geometry}}, \"m\")",
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314 | 43997 | jjdelcerro | new String[]{ |
315 | "geometry - Geometry",
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316 | 43999 | jjdelcerro | "Projection - Optional. Projection of the geometry or a string with the projection name",
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317 | 43997 | jjdelcerro | "units - String value with the name the units to use"
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318 | }, |
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319 | "Double"
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320 | ); |
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321 | } |
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322 | |||
323 | @Override
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324 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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325 | 43999 | jjdelcerro | int units = 0; |
326 | IProjection proj = null;
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327 | 43997 | jjdelcerro | Geometry geom = getGeom(args, 0);
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328 | 43999 | jjdelcerro | switch( args.length ) {
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329 | case 2: |
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330 | units = getUnits(args, 1);
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331 | break;
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332 | case 3: |
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333 | proj = getProjection(args, 1);
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334 | units = getUnits(args, 2);
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335 | break;
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336 | } |
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337 | 43997 | jjdelcerro | if (proj == null) { |
338 | proj = geom.getProjection(); |
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339 | } |
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340 | AreaAndPerimeterCalculator calculator = new AreaAndPerimeterCalculator();
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341 | double area = calculator.perimeter(geom, proj, units);
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342 | return area;
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343 | } |
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344 | } |
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345 | |||
346 | 43987 | jjdelcerro | private class PropertyFunction extends AbstractFunction { |
347 | |||
348 | public PropertyFunction() {
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349 | super(
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350 | "Project",
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351 | "property",
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352 | Range.between(2, 3), |
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353 | "Access to a property value in a properties file. If the"
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354 | + "indicated filename is not absolute, access it relative"
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355 | + "to the project.",
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356 | "property({{filename}}, name, defaultValue)",
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357 | new String[]{ |
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358 | "filename - String value with the name of the properties file",
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359 | "name - String value with the name of the property to retrieve from the file",
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360 | "defaultValue - Optional. Default value if can't access the file or the property",},
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361 | "String"
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362 | ); |
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363 | } |
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364 | |||
365 | @Override
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366 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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367 | String filename = getStr(args, 0); |
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368 | String name = getStr(args, 1); |
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369 | String defaultValue = null; |
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370 | if (args.length == 3) { |
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371 | defaultValue = getStr(args, 2);
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372 | } |
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373 | |||
374 | File file = new File(filename); |
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375 | if (!file.isAbsolute()) {
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376 | Project project = currentProject.get(); |
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377 | if (project.getFile() == null) { |
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378 | return defaultValue;
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379 | } |
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380 | file = new File(project.getFile().getParent(), filename); |
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381 | } |
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382 | Map<File, Properties> x = propertiesFiles.get(); |
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383 | Properties properties = x.get(file);
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384 | if (properties == null) { |
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385 | properties = new Properties(); |
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386 | FileInputStream in = null; |
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387 | try {
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388 | in = new FileInputStream(file); |
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389 | properties.load(in); |
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390 | } catch (Exception ex) { |
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391 | return defaultValue;
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392 | } finally {
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393 | IOUtils.closeQuietly(in); |
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394 | } |
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395 | x.put(file, properties); |
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396 | } |
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397 | String value = properties.getProperty(name, defaultValue);
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398 | return value;
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399 | } |
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400 | |||
401 | } |
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402 | |||
403 | ProjectValue currentProject = new ProjectValue();
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404 | PropertiesValue propertiesFiles = new PropertiesValue();
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405 | |||
406 | @SuppressWarnings("OverridableMethodCallInConstructor") |
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407 | public ProjectSymbolTable() {
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408 | super("Project"); |
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409 | this.addFunction(new CurrentProjectFunction()); |
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410 | this.addFunction(new FirstSelectedFeatureFunction()); |
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411 | this.addFunction(new FirstFeatureFunction()); |
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412 | this.addFunction(new ViewFunction()); |
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413 | this.addFunction(new PropertyFunction()); |
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414 | 43997 | jjdelcerro | this.addFunction(new AreaFunction()); |
415 | this.addFunction(new PerimeterFunction()); |
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416 | 43987 | jjdelcerro | } |
417 | |||
418 | 43997 | jjdelcerro | private MapContext getMapContext(Feature feature) {
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419 | FeatureStore store = feature.getStore(); |
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420 | Project project = ProjectManager.getInstance().getCurrentProject(); |
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421 | project.getDocuments(ViewManager.TYPENAME); |
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422 | for (Document document : project.getDocuments(ViewManager.TYPENAME)) { |
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423 | ViewDocument view = (ViewDocument) document; |
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424 | MapContext mapContext = view.getMapContext(); |
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425 | FLayer layer = getLayer(mapContext, store); |
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426 | if (layer != null) { |
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427 | return mapContext;
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428 | } |
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429 | } |
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430 | return null; |
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431 | } |
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432 | |||
433 | private FLayer getLayer(MapContext mapContext, FeatureStore store) {
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434 | Iterator<FLayer> it = mapContext.deepiterator();
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435 | while (it.hasNext()) {
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436 | FLayer layer = it.next(); |
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437 | if (layer instanceof FLyrVect) { |
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438 | FeatureStore layer_store = ((FLyrVect) layer).getFeatureStore(); |
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439 | if (layer_store == store) {
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440 | return layer;
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441 | } |
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442 | } |
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443 | } |
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444 | return null; |
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445 | } |
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446 | |||
447 | private IProjection getProjection(Object[] args, int i) { |
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448 | Object value = args[i];
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449 | if (value == null) { |
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450 | return null; |
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451 | } |
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452 | if (value instanceof IProjection) { |
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453 | return (IProjection) value;
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454 | } |
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455 | String code = value.toString();
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456 | return CRSFactory.getCRS(code);
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457 | } |
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458 | |||
459 | private int getUnits(Object[] args, int i) { |
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460 | Object value = args[i];
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461 | if (value == null) { |
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462 | throw new IllegalArgumentException("Illegal unit value 'null'"); |
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463 | } |
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464 | if (value instanceof Number) { |
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465 | return ((Number) value).intValue(); |
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466 | } |
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467 | String name = value.toString();
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468 | String[] names = MapContext.getAreaAbbr(); |
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469 | for (int j = 0; j < names.length; j++) { |
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470 | if (name.equalsIgnoreCase(names[j])) {
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471 | return j;
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472 | } |
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473 | } |
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474 | names = MapContext.getAreaNames(); |
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475 | for (int j = 0; j < names.length; j++) { |
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476 | if (name.equalsIgnoreCase(names[j])) {
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477 | return j;
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478 | } |
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479 | } |
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480 | throw new IllegalArgumentException("Illegal unit name '" + name + "'"); |
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481 | } |
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482 | |||
483 | 43987 | jjdelcerro | public static void selfRegister() { |
484 | ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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485 | manager.registerSymbolTable(new ProjectSymbolTable(), true); |
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486 | } |
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487 | } |