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Can I modify a java file using XTend? [message #1778009]

Thu, 07 December 2017 17:13

Mia G

Messages: 1
Registered: December 2017

Junior Member

I am trying to parse a DSL and modify an existing java file with the changes.

For e.g., The user can enter the following in the XText editor:

sum = a + b
file path = "C:\file1.java"

If the user enters "sum = a+b" in the DSL and mention the java filepath in the DSL as "C:\file1.java"; I want to modify the file1.java and add a code snippet like:

sum = a+b;
(here a,b and sum are already defined in the file1.java file).

Before:

public class file1 {
public static void main (String[] args){
int a =1, b =4, sum=0, product=0;
product = a*b;
System.out.println("Product is :"+product);
} }

After:

public class file1 {
public static void main (String[] args){
int a =1, b =4, sum=0, product=0;
product = a*b;
sum = a + b;
System.out.println("Product is :"+product);
} }

Is there a way to do it using XText/XTend or any other tool?

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Re: Can I modify a java file using XTend? [message #1778191 is a reply to message #1778009]

Mon, 11 December 2017 16:05

Uli Merkel

Messages: 250
Registered: June 2013

Senior Member

Hi Mia,

for me it just looks like you want to add some text to an existing file?
But how do you want to specify where your additional lines should be placed into the file?

I think for textual replacements, there will be tools available which do not need a pretty complicate grammar.

Uli

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