src/main/java/ognl/Ognl.java
public static Map addDefaultContext(Object root, ClassResolver classResolver, Map context)
    {
        return addDefaultContext(root, null, classResolver, null, context);
    }
public static Map addDefaultContext(Object root, ClassResolver classResolver, Map context)
    {
        return addDefaultContext(root, null, classResolver, null, context);
    }
Appends the standard naming context for evaluating an OGNL expression into the context given
so that cached maps can be used as a context.

@param root
The root of the object graph.
@param classResolver
The resolver used to instantiate {@link Class} instances referenced in the expression.
@param context
The context to which OGNL context will be added.

@return Context Map with the keys <CODE>root</CODE> and <CODE>context</CODE> set
appropriately