svn-gvsig-desktop / 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 / DefaultSymbolTable.java @ 43809
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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.SymbolTable; |
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import org.gvsig.expressionevaluator.MutableSymbolTable; |
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public class DefaultSymbolTable implements MutableSymbolTable { |
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private SymbolTable delegatedSymbolTable;
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private Map<String,Object> vars; |
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private Map<String,Function> functions; |
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public DefaultSymbolTable(SymbolTable delegatedSymbolTable) {
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this.delegatedSymbolTable = delegatedSymbolTable;
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this.vars = new HashMap<>(); |
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this.functions = new HashMap<>(); |
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} |
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public DefaultSymbolTable() {
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this(null); |
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} |
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@Override
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public MutableSymbolTable clone() throws CloneNotSupportedException { |
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DefaultSymbolTable other = (DefaultSymbolTable) super.clone();
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if( this.delegatedSymbolTable!=null ) { |
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other.delegatedSymbolTable = this.delegatedSymbolTable.clone();
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} |
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other.vars = new HashMap<>(vars); |
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other.functions = new HashMap<>(functions); |
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return other;
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} |
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@Override
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public void addVar(String name, Object value) { |
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this.vars.put(name, value);
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} |
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@Override
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public void addFunction(Function function) { |
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this.functions.put(function.name(), function);
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} |
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@Override
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public Function function(String name) { |
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Function fn = this.functions.get(name);
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if( fn == null && this.delegatedSymbolTable != null ) { |
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fn = this.delegatedSymbolTable.function(name);
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} |
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return fn;
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} |
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@Override
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public boolean exists(String name) { |
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boolean e = this.vars.containsKey(name); |
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if( !e ) {
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e = this.delegatedSymbolTable.exists(name);
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} |
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return e;
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} |
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@Override
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public Object value(String name) { |
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if( this.vars.containsKey(name) ) { |
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return this.vars.get(name); |
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} |
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return this.delegatedSymbolTable.value(name); |
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} |
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@Override
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public void setSymbolTable(SymbolTable symbolTable) { |
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this.delegatedSymbolTable = symbolTable;
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} |
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@Override
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public SymbolTable getSymbolTable() {
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return this.delegatedSymbolTable; |
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} |
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@Override
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public void removeVar(String name) { |
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this.vars.remove(name);
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} |
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@Override
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public void removeFunction(String name) { |
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this.functions.remove(name);
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} |
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@Override
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public Iterator<String> itervars() { |
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return this.vars.keySet().iterator(); |
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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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} |