Revision 43913 trunk/org.gvsig.desktop/org.gvsig.desktop.library/org.gvsig.expressionevaluator/org.gvsig.expressionevaluator.lib/org.gvsig.expressionevaluator.lib.impl/src/main/java/org/gvsig/expressionevaluator/impl/SQLSymbolTable.java
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package org.gvsig.expressionevaluator.impl; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.Map; |
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import org.gvsig.expressionevaluator.Function; |
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import org.gvsig.expressionevaluator.impl.function.operator.AddOperator; |
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import org.gvsig.expressionevaluator.impl.function.operator.AndOperator; |
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import org.gvsig.expressionevaluator.impl.function.operator.DivOperator; |
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import org.gvsig.expressionevaluator.impl.function.string.UpperFunction; |
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public class SQLSymbolTable implements SymbolTable {
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public class SQLSymbolTable extends AbstractSymbolTable implements SymbolTable {
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private final Map<String,Function> functions; |
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private static SQLSymbolTable instance = null; |
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return instance; |
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} |
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@SuppressWarnings("OverridableMethodCallInConstructor")
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private SQLSymbolTable() {
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this.functions = new HashMap<>();
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super();
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addFunction(new AndOperator()); |
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addFunction(new AddOperator()); |
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} |
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@Override |
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@SuppressWarnings("CloneDoesntCallSuperClone")
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public SymbolTable clone() throws CloneNotSupportedException {
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// SQLSymbolTable is singleton and immutable, so we just return |
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// the same instance. |
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return this; |
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} |
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private void addFunction(Function function) {
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this.functions.put(function.name().toLowerCase(), function); |
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} |
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@Override |
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public Function function(String name) {
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return this.functions.get(name.toLowerCase()); |
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} |
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@Override |
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public boolean exists(String name) {
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return false; |
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} |
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} |
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}; |
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} |
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@Override |
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public Iterator<Function> iterfuncs() {
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return this.functions.values().iterator(); |
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} |
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@Override |
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public Iterator<Function> iterator() {
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return iterfuncs(); |
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} |
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} |
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