svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.api / src / main / java / org / gvsig / expressionevaluator / spi / AbstractSymbolTable.java @ 46010
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1 | 43983 | jjdelcerro | package org.gvsig.expressionevaluator.spi; |
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2 | |||
3 | import java.util.ArrayList; |
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4 | import java.util.Collection; |
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5 | import java.util.Collections; |
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6 | import java.util.HashMap; |
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7 | import java.util.HashSet; |
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8 | import java.util.Iterator; |
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9 | import java.util.List; |
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10 | import java.util.Map; |
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11 | import java.util.Set; |
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12 | import org.apache.commons.lang3.StringUtils; |
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13 | import org.gvsig.expressionevaluator.Function; |
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14 | 45980 | jjdelcerro | import org.gvsig.expressionevaluator.MutableSymbolTable; |
15 | 43983 | jjdelcerro | import org.gvsig.expressionevaluator.SymbolTable; |
16 | 45739 | jjdelcerro | import org.gvsig.tools.util.GetItemByKey; |
17 | 43983 | jjdelcerro | |
18 | /**
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19 | *
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20 | * @author jjdelcerro
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21 | */
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22 | 45739 | jjdelcerro | public abstract class AbstractSymbolTable implements SymbolTable, GetItemByKey<String, Object> { |
23 | 43983 | jjdelcerro | |
24 | private final String name; |
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25 | |||
26 | |||
27 | 45980 | jjdelcerro | protected Map<String, Object> vars; |
28 | 45620 | jjdelcerro | |
29 | 45980 | jjdelcerro | protected List<SymbolTable> symbolTables; |
30 | 43983 | jjdelcerro | protected Map<String, Function> functions; |
31 | 44139 | jjdelcerro | protected Map<String, Function> functionAlias; |
32 | 43983 | jjdelcerro | |
33 | public AbstractSymbolTable() {
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34 | this(null); |
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35 | } |
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36 | |||
37 | public AbstractSymbolTable(String name) { |
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38 | 45739 | jjdelcerro | if( name == null ) { |
39 | this.name = "Anonymous"; |
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40 | } else {
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41 | this.name = name;
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42 | } |
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43 | 43983 | jjdelcerro | this.symbolTables = new ArrayList<>(); |
44 | this.vars = null; |
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45 | this.functions = null; |
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46 | 44139 | jjdelcerro | this.functionAlias = null; |
47 | 43983 | jjdelcerro | } |
48 | |||
49 | @Override
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50 | public String getName() { |
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51 | return name;
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52 | } |
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53 | 43987 | jjdelcerro | |
54 | 45620 | jjdelcerro | public void addFunction(Function function) { |
55 | 43987 | jjdelcerro | if (function == null) { |
56 | throw new IllegalArgumentException("function can't be null"); |
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57 | } |
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58 | this.getFunctions().put(function.name().toUpperCase(), function);
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59 | 44139 | jjdelcerro | List<String> aliases = function.aliases(); |
60 | if( aliases == null || aliases.isEmpty() ) { |
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61 | return;
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62 | } |
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63 | Map<String, Function> theFunctionAlias = this.getFunctionAlias(); |
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64 | for (String alias : aliases) { |
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65 | if( alias!=null ) { |
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66 | theFunctionAlias.put(alias, function); |
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67 | } |
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68 | } |
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69 | 43987 | jjdelcerro | } |
70 | 43983 | jjdelcerro | |
71 | 45620 | jjdelcerro | public void addFunctions(Collection<Function> functions) { |
72 | for (Function function : functions) {
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73 | this.addFunction(function);
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74 | } |
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75 | } |
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76 | |||
77 | public void removeFunction(String name) { |
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78 | if( StringUtils.isEmpty(name) ) {
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79 | throw new IllegalArgumentException("name can't be null"); |
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80 | } |
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81 | this.functions.remove(name.toUpperCase());
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82 | } |
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83 | |||
84 | 43983 | jjdelcerro | @Override
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85 | 44215 | jjdelcerro | public boolean addSymbolTable(SymbolTable symbolTable) { |
86 | 44838 | jjdelcerro | if( symbolTable==null ) { |
87 | throw new IllegalArgumentException("Invalid symbol table (null)"); |
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88 | } |
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89 | 43983 | jjdelcerro | if (this.symbolTables.contains(symbolTable)) { |
90 | 44215 | jjdelcerro | return false; |
91 | 43983 | jjdelcerro | } |
92 | 44836 | jjdelcerro | this.symbolTables.add(0,symbolTable); |
93 | 44215 | jjdelcerro | return true; |
94 | 43983 | jjdelcerro | } |
95 | |||
96 | 44215 | jjdelcerro | @Override
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97 | public boolean containsSymbolTable(SymbolTable symbolTable) { |
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98 | return this.symbolTables.contains(symbolTable); |
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99 | } |
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100 | |||
101 | @Override
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102 | public boolean removeSymbolTable(SymbolTable symbolTable) { |
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103 | boolean n = this.symbolTables.remove(symbolTable); |
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104 | return n;
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105 | } |
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106 | |||
107 | 43983 | jjdelcerro | protected Map<String, Object> getVars() { |
108 | if (this.vars == null) { |
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109 | this.vars = new HashMap<>(); |
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110 | } |
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111 | return this.vars; |
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112 | } |
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113 | |||
114 | 45620 | jjdelcerro | public void setVar(String name, Object value) { |
115 | if( StringUtils.isEmpty(name) ) {
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116 | throw new IllegalArgumentException("name can't be null"); |
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117 | } |
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118 | this.getVars().put(name.toUpperCase(), value);
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119 | } |
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120 | |||
121 | public void removeVar(String name) { |
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122 | if( StringUtils.isEmpty(name) ) {
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123 | throw new IllegalArgumentException("name can't be null"); |
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124 | } |
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125 | this.getVars().remove(name.toUpperCase());
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126 | } |
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127 | |||
128 | 43983 | jjdelcerro | protected Map<String, Function> getFunctions() { |
129 | if (this.functions == null) { |
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130 | this.functions = new HashMap<>(); |
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131 | } |
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132 | return this.functions; |
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133 | } |
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134 | |||
135 | 44139 | jjdelcerro | protected Map<String, Function> getFunctionAlias() { |
136 | if (this.functionAlias == null) { |
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137 | this.functionAlias = new HashMap<>(); |
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138 | } |
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139 | return this.functionAlias; |
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140 | } |
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141 | |||
142 | 43983 | jjdelcerro | @Override
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143 | public boolean exists(String name) { |
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144 | if (StringUtils.isEmpty(name)) {
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145 | return false; |
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146 | } |
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147 | 45620 | jjdelcerro | if (this.getVars().containsKey(name.toUpperCase())) { |
148 | return true; |
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149 | 43983 | jjdelcerro | } |
150 | 45739 | jjdelcerro | if( StringUtils.equalsIgnoreCase(name, "$symboltable") ) { |
151 | return true; |
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152 | } |
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153 | 43983 | jjdelcerro | for (SymbolTable other : this.symbolTables) { |
154 | if (other.exists(name)) {
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155 | return true; |
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156 | } |
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157 | } |
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158 | return false; |
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159 | } |
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160 | |||
161 | @Override
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162 | public Object value(String name) { |
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163 | if (StringUtils.isEmpty(name)) {
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164 | return null; |
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165 | } |
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166 | 45620 | jjdelcerro | name = name.toUpperCase(); |
167 | if (this.getVars().containsKey(name)) { |
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168 | return this.getVars().get(name); |
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169 | 43983 | jjdelcerro | } |
170 | 45739 | jjdelcerro | if( name.equals("$SYMBOLTABLE") ) { |
171 | return this; |
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172 | } |
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173 | 43983 | jjdelcerro | for (SymbolTable other : this.symbolTables) { |
174 | if (other.exists(name)) {
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175 | return other.value(name);
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176 | } |
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177 | 45739 | jjdelcerro | if( StringUtils.equalsIgnoreCase(name, other.getName())) {
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178 | return other;
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179 | } |
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180 | 43983 | jjdelcerro | } |
181 | return null; |
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182 | } |
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183 | |||
184 | @Override
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185 | 45739 | jjdelcerro | public Object get(String name) { |
186 | return this.value(name); |
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187 | } |
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188 | |||
189 | @Override
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190 | 43983 | jjdelcerro | public Function function(String name) { |
191 | if (StringUtils.isEmpty(name)) {
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192 | return null; |
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193 | } |
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194 | if (this.functions != null) { |
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195 | name = name.toUpperCase(); |
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196 | if (this.functions.containsKey(name)) { |
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197 | return this.functions.get(name); |
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198 | } |
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199 | } |
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200 | 44139 | jjdelcerro | if (this.functionAlias != null) { |
201 | name = name.toUpperCase(); |
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202 | if (this.functionAlias.containsKey(name)) { |
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203 | return this.functionAlias.get(name); |
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204 | } |
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205 | } |
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206 | 43983 | jjdelcerro | for (SymbolTable other : this.symbolTables) { |
207 | Function fn = other.function(name); |
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208 | if (fn != null) { |
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209 | return fn;
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210 | } |
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211 | } |
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212 | 44533 | jjdelcerro | return null; |
213 | 43983 | jjdelcerro | } |
214 | |||
215 | @Override
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216 | public Collection<String> variables() { |
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217 | Set<String> theVars = new HashSet<>(); |
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218 | for (SymbolTable symbolTable : this.symbolTables) { |
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219 | theVars.addAll(symbolTable.variables()); |
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220 | } |
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221 | 44398 | jjdelcerro | theVars.addAll(this.localvariables());
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222 | 43983 | jjdelcerro | return Collections.unmodifiableCollection(theVars); |
223 | } |
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224 | |||
225 | @Override
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226 | public Collection<Function> functions() { |
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227 | Set<Function> theFunctions = new HashSet<>(); |
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228 | for (SymbolTable symbolTable : this.symbolTables) { |
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229 | theFunctions.addAll(symbolTable.functions()); |
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230 | } |
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231 | if (this.functions != null) { |
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232 | theFunctions.addAll(this.functions.values());
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233 | } |
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234 | return Collections.unmodifiableCollection(theFunctions); |
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235 | } |
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236 | |||
237 | @Override
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238 | 44338 | jjdelcerro | public Collection<Function> localfunctions() { |
239 | if( this.functions == null ) { |
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240 | return Collections.EMPTY_LIST; |
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241 | } |
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242 | return Collections.unmodifiableCollection(this.functions.values()); |
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243 | } |
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244 | |||
245 | @Override
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246 | 44340 | jjdelcerro | public Collection<String> localvariables() { |
247 | 45703 | jjdelcerro | if( this.getVars().isEmpty()) { |
248 | 44340 | jjdelcerro | return Collections.EMPTY_LIST; |
249 | } |
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250 | return Collections.unmodifiableCollection(this.vars.keySet()); |
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251 | } |
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252 | |||
253 | @Override
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254 | 43983 | jjdelcerro | public Iterator<Function> iterator() { |
255 | return this.functions().iterator(); |
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256 | } |
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257 | |||
258 | @Override
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259 | public SymbolTable clone() throws CloneNotSupportedException { |
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260 | 45980 | jjdelcerro | AbstractSymbolTable other = (AbstractSymbolTable) super.clone();
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261 | if( this instanceof MutableSymbolTable ) { |
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262 | 46010 | jjdelcerro | if( this.vars!=null ) { |
263 | other.vars = new HashMap<>(this.vars); |
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264 | } |
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265 | if( this.functions!=null ) { |
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266 | other.functions = new HashMap<>(this.functions); |
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267 | } |
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268 | if( this.functionAlias!=null ) { |
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269 | other.functionAlias = new HashMap<>(this.functionAlias); |
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270 | } |
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271 | 45980 | jjdelcerro | } |
272 | other.symbolTables = new ArrayList<>(); |
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273 | 46010 | jjdelcerro | if( this.symbolTables!=null ) { |
274 | for (SymbolTable symbolTable : this.symbolTables) { |
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275 | other.symbolTables.add(symbolTable.clone()); |
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276 | } |
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277 | 45980 | jjdelcerro | } |
278 | 43983 | jjdelcerro | return other;
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279 | } |
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280 | |||
281 | 44205 | jjdelcerro | @Override
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282 | public boolean isSQLCompatible(String name) { |
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283 | Function f = function(name); |
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284 | if( f!=null ) { |
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285 | return f.isSQLCompatible();
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286 | } |
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287 | return true; |
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288 | } |
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289 | |||
290 | 45739 | jjdelcerro | public List<SymbolTable> getSymbolTables() { |
291 | return Collections.unmodifiableList(symbolTables); |
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292 | } |
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293 | |||
294 | @Override
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295 | public String toString() { |
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296 | return this.name; |
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297 | } |
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298 | |||
299 | 43983 | jjdelcerro | } |