Extended JexlEngine class

package ru.dizpers.core;

import java.util.Map;

import org.apache.commons.jexl2.JexlArithmetic;
import org.apache.commons.jexl2.JexlContext;
import org.apache.commons.jexl2.JexlException;
import org.apache.commons.jexl2.introspection.Uberspect;
import org.apache.commons.jexl2.parser.JexlNode;
import org.apache.commons.logging.Log;

import ru.dizpers.core.Interpreter;

public class JexlEngine extends org.apache.commons.jexl2.JexlEngine{
	public JexlEngine(){
		super();
	}

	public JexlEngine(Uberspect anUberspect, JexlArithmetic anArithmetic, Map<String, Object> theFunctions, Log log) {
		super(anUberspect, anArithmetic, theFunctions, log);
	}

	@Override
	public Object getProperty(JexlContext context, Object bean, String expr) {
        if (context == null) {
            context = EMPTY_CONTEXT;
        }
        // synthetize expr using register
        expr = "#0" + (expr.charAt(0) == '[' ? "" : ".") + expr + ";";
        try {
            parser.ALLOW_REGISTERS = true;
            JexlNode tree = parse(expr, null);
            JexlNode node = tree.jjtGetChild(0);
            Interpreter interpreter = createInterpreter(context);
            // set register
            interpreter.setRegisters(bean);
            return node.jjtAccept(interpreter, null);
        } catch (JexlException xjexl) {
            if (silent) {
                logger.warn(xjexl.getMessage(), xjexl.getCause());
                return null;
            }
            throw xjexl;
        } finally {
            parser.ALLOW_REGISTERS = false;
        }
    }

	@Override
    protected Interpreter createInterpreter(JexlContext context) {
        if (context == null) {
            context = EMPTY_CONTEXT;
        }
        return new Interpreter(this, context);
    }
}