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Customize Java-Expression "toString" [message #1843730]

Mon, 16 August 2021 09:19

Frä Fröhlich

Messages: 22
Registered: June 2021

Junior Member

I am using JBase with Java-Expressions my project.
Luckily, when I am parsing my rules and want to print the entered input of the user I can easily call

NodeModelUtils.getTokenText(NodeModelUtils.findActualNodeFor(object))

. Let's call this the "toString" Method for the rest of this thread.

While this is very helpful I couldn't figure out how it works in details since it is very low level implemented. I wanted to introduce tiny changes to the "toString" Method. I.e. I want to introduce a namespace for the variables(a = 5; should become MyNameSpace.a = 5;). Furthermore, I would like to enforce line endings "\n" to not get converted to whitespaces like it is the case in the getTokenText Method.

I couldn't find an entry point where to start.
Can You help?

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Re: Customize Java-Expression "toString" [message #1843733 is a reply to message #1843730]

Mon, 16 August 2021 10:04

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

i dont understand this question.
if you dont like what NodeModelUtils.getTokenText(NodeModelUtils.findActualNodeFor(object))
why dont you traverse the nodemodel yourself..

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Customize Java-Expression "toString" [message #1843734 is a reply to message #1843733]

Mon, 16 August 2021 10:25

Frä Fröhlich

Messages: 22
Registered: June 2021

Junior Member

The traversal of a "simple" java statement like in JBase is quite complex because it has multiple branches and attributes.
I thought there is a different way of getting the string. Since the NodeModelUtils doesn't have access to structure of my models, there must be a way to get the string without traversing.
Nonetheless, I can't really understand the fundamentals of what this class actually does with all this composite nodes.

If there is no such way of customizing the nodeutils, then I will have to traverse the whole grammar myself.

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