src/main/java/ognl/Ognl.java
public static Object getValue(ExpressionAccessor expression, OgnlContext context, Object root)
    {
        return expression.get(context, root);
    }
public static Object getValue(ExpressionAccessor expression, OgnlContext context, Object root)
    {
        return expression.get(context, root);
    }
Gets the value represented by the given pre-compiled expression on the specified root
object.

@param expression
The pre-compiled expression, as found in {@link Node#getAccessor()}.
@param context
The ognl context.
@param root
The object to retrieve the expression value from.
@return
The value.