Application: gvSIG desktop

package org.gvsig.expressionevaluator.integration;

import java.util.Iterator;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.SymbolTable;

import org.gvsig.tools.evaluator.EvaluatorData;

public class EvaluatorDataAdapter implements SymbolTable {

    private EvaluatorData data;

    private final SymbolTable symbolTable;

    EvaluatorDataAdapter(SymbolTable symbolTable) {

        this.symbolTable = symbolTable;

    }

    public void setData(EvaluatorData data) {

        this.data = data;

    }

    @Override

    public Function function(String name) {

        return symbolTable.function(name);

    }

    @Override

    @SuppressWarnings("CloneDoesntCallSuperClone")

    public SymbolTable clone() throws CloneNotSupportedException {

        throw new CloneNotSupportedException("This class can't be cloned.");

    }

    @Override

    public boolean exists(String name) {

        if( data.hasDataValue(name) ) {

            return true;

        }

        if( data.hasContextValue(name) ) {

            return true;

        }

        return symbolTable.exists(name);

    }

    @Override

    public Object value(String name) {

        if( data.hasDataValue(name) ) {

            return data.getDataValue(name);

        }

        if( data.hasContextValue(name) ) {

            return data.getContextValue(name);

        }

        return symbolTable.value(name);

    }

    @Override

    public Iterator<String> itervars() {

        return null;

    }

    @Override

    public Iterator<Function> iterfuncs() {

        return symbolTable.iterfuncs();

    }

    @Override

    public Iterator<Function> iterator() {

        return symbolTable.iterfuncs();

    }

}