Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl.function.programming;

import org.apache.commons.lang3.Range;

import org.gvsig.expressionevaluator.Expression;

import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_EVAL;

import org.gvsig.expressionevaluator.ExpressionUtils;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

public class EvalFunction extends AbstractFunction {

    public EvalFunction() {

        super(

            Function.GROUP_PROGRAMMING, 

            FUNCTION_EVAL, 

            Range.is(1),

            "",

            FUNCTION_EVAL+"({{string}})",

            null,

            "Object",

            false

        );

    }

    @Override

    public boolean allowConstantFolding() {

        return false;

    }    

    @Override

    public Object call(Interpreter interpreter, final Object[] args) throws Exception {

        String s = this.getStr(args, 0);

        Expression exp = ExpressionUtils.createExpression(s);

        Object v = exp.execute(interpreter.getSymbolTable());

        return v;

    }

}