svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / expressionevaluator / impl / symboltable / FeatureSymbolTableImpl.java @ 44748
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1 | 44738 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2020 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | package org.gvsig.expressionevaluator.impl.symboltable; |
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25 | |||
26 | import org.apache.commons.lang3.Range; |
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27 | import org.apache.commons.lang3.StringUtils; |
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28 | import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
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29 | import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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30 | import org.gvsig.expressionevaluator.Function; |
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31 | import org.gvsig.expressionevaluator.Interpreter; |
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32 | import org.gvsig.expressionevaluator.MutableSymbolTable; |
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33 | import org.gvsig.expressionevaluator.impl.DALFunctions; |
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34 | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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35 | import org.gvsig.expressionevaluator.spi.AbstractSymbolTable; |
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36 | import org.gvsig.fmap.dal.DataManager; |
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37 | 44748 | jjdelcerro | import static org.gvsig.fmap.dal.DataManager.FUNCTION_CURRENT_ROW; |
38 | 44738 | jjdelcerro | import org.gvsig.fmap.dal.expressionevaluator.FeatureSymbolTable; |
39 | import org.gvsig.fmap.dal.feature.Feature; |
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40 | import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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41 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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42 | import org.gvsig.fmap.dal.feature.FeatureType; |
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43 | import org.gvsig.tools.dynobject.DynObject; |
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44 | import org.gvsig.tools.dynobject.DynObjectAdapter; |
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45 | import org.gvsig.tools.dynobject.exception.DynFieldNotFoundException; |
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46 | |||
47 | /**
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48 | *
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49 | * @author jjdelcerro
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50 | */
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51 | @SuppressWarnings("UseSpecificCatch") |
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52 | public class FeatureSymbolTableImpl extends AbstractSymbolTable implements FeatureSymbolTable { |
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53 | |||
54 | private final Function current_row; |
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55 | private Feature feature;
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56 | private FeatureType type;
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57 | private String storeName; |
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58 | private DynObject storeAdapter;
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59 | |||
60 | @SuppressWarnings("OverridableMethodCallInConstructor") |
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61 | public FeatureSymbolTableImpl() {
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62 | super(DataManager.DAL_SYMBOL_TABLE_FEATURE);
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63 | this.current_row = new AbstractFunction( |
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64 | DALFunctions.GROUP_DATA_ACCESS, |
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65 | 44748 | jjdelcerro | FUNCTION_CURRENT_ROW, |
66 | 44738 | jjdelcerro | Range.is(0),
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67 | "Return the current row when used in a table filter.\n"
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68 | + "Return null if used outer a table filter.",
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69 | 44748 | jjdelcerro | FUNCTION_CURRENT_ROW + "()",
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70 | 44738 | jjdelcerro | null,
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71 | "Feature"
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72 | ) { |
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73 | @Override
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74 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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75 | return feature;
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76 | } |
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77 | }; |
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78 | this.storeAdapter = new DynObjectAdapter() { |
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79 | @Override
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80 | public Object getDynValue(String name) throws DynFieldNotFoundException { |
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81 | try {
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82 | return feature.get(name);
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83 | } catch (Exception ex) { |
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84 | return feature.getExtraValue(name);
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85 | } |
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86 | } |
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87 | |||
88 | @Override
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89 | public boolean hasDynValue(String name) { |
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90 | if( feature.getType().get(name)!=null ) { |
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91 | return true; |
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92 | } |
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93 | return feature.hasExtraValue(name);
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94 | } |
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95 | |||
96 | }; |
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97 | } |
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98 | |||
99 | @Override
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100 | public FeatureSymbolTableImpl clone() throws CloneNotSupportedException { |
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101 | FeatureSymbolTableImpl other = (FeatureSymbolTableImpl) super.clone();
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102 | return other;
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103 | } |
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104 | |||
105 | @Override
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106 | public Function function(String name) { |
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107 | 44748 | jjdelcerro | if (StringUtils.equalsIgnoreCase(name, FUNCTION_CURRENT_ROW)) {
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108 | 44738 | jjdelcerro | return this.current_row; |
109 | } |
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110 | return super.function(name); |
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111 | } |
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112 | |||
113 | @Override
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114 | public boolean exists(String name) { |
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115 | if (type == null) { |
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116 | return false; |
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117 | } |
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118 | if ( type.get(name) != null) { |
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119 | return true; |
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120 | } |
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121 | if (StringUtils.equalsIgnoreCase(name, this.storeName)) { |
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122 | return true; |
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123 | } |
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124 | if( feature==null ) { |
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125 | return false; |
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126 | } |
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127 | if (this.feature.hasExtraValue(name)) { |
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128 | return true; |
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129 | } |
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130 | return false; |
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131 | } |
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132 | |||
133 | @Override
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134 | public Object value(String name) { |
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135 | if (feature == null) { |
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136 | return null; |
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137 | } |
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138 | if (StringUtils.equalsIgnoreCase(name, this.storeName)) { |
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139 | return this.storeAdapter; |
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140 | } |
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141 | try {
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142 | return this.feature.get(name); |
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143 | } catch (Exception ex) { |
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144 | return this.feature.getExtraValue(name); |
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145 | } |
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146 | } |
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147 | |||
148 | @Override
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149 | public boolean isSQLCompatible(String name) { |
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150 | if (this.type == null) { |
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151 | return super.isSQLCompatible(name); |
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152 | } |
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153 | FeatureAttributeDescriptor attrdesc = this.type.getAttributeDescriptor(name);
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154 | if (attrdesc == null) { |
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155 | return true; |
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156 | } |
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157 | if (attrdesc.isComputed()) {
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158 | return false; |
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159 | } |
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160 | return true; |
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161 | } |
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162 | |||
163 | @Override
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164 | public void setFeature(Feature feature) { |
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165 | this.feature = feature;
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166 | if (this.type == null) { |
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167 | this.type = feature.getType();
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168 | FeatureStore store = feature.getStore(); |
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169 | if (store != null) { |
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170 | this.storeName = store.getName();
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171 | } |
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172 | } |
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173 | } |
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174 | |||
175 | @Override
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176 | public MutableSymbolTable createParent() {
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177 | ExpressionEvaluatorManager expManager = ExpressionEvaluatorLocator.getManager(); |
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178 | |||
179 | MutableSymbolTable symbolTable = expManager.createSymbolTable(); |
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180 | symbolTable.addSymbolTable(this);
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181 | return symbolTable;
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182 | } |
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183 | |||
184 | } |