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Current Action is directly under ValueStack Or ActionContext

 
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As per my knowledge, the current action object is directly under value stack (and value stack is the root object of the contextmap) but diagram in this link https://struts.apache.org/docs/ognl.html shows the current action is directly under context map (instead of value stack). which is true?
 
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Both. As it states on the page you referenced:

The Action instance is always pushed onto the value stack. Because the Action is on the stack, and the stack is the OGNL root, references to Action properties can omit the # marker. But, to access other objects in the ActionContext, we must use the # notation so OGNL knows not to look in the root object, but for some other object in the ActionContext.



The diagram you refer to is not an object diagram, but a diagram reflecting how the ActionContext is referenced in OGNL.
 
Sandeep Vaid
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So in the object diagram, current action will be directly under value stack instead of context map. Right?
and where can i see the object hierarchy?
 
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