| xtend code [message #1833775] |
Fri, 23 October 2020 16:23  |
 Muhammad Salman Tayyab
Messages: 26
Registered: March 2020
Location: Germany |
Junior Member |
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Hey, I have written the Java code and the grammar also. Now, I am facing difficulty in writing the xtend code. I am attaching everything please have a look and help. Thanks in advance.
Grammar
Model:
parts+=ModelPart*;
ModelPart:
Video | Videouse;
Video:
"video_list" "{" videos+=Videodef* "}";
Videodef:
name=ID "=" value=STRING ";";
Videouse:
"actions" "{" playvideo+=Videoshow* "}";
Videoshow:
"show(" vid=[Videodef] ");";
Java Code
import java.util.Scanner;
public class grammarcode {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
String[] videos= new String[2];
// String[] actions;
System.out.println("Please enter the videos name to play");
for(int i=0;i<(videos.length);i++) {
videos[i]=input.nextLine();
}
System.out.println("video_list{");
for(int i=0;i<(videos.length);i++) {
System.out.println(videos[i] +";");
}
System.out.println("}");
System.out.println("actions{");
for(int i=0;i<(videos.length);i++){
System.out.println("show("+ videos[i]+ ");");
}
System.out.println("}");
}
}
[Updated on: Fri, 23 October 2020 16:24] Report message to a moderator |
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| Re: xtend code [message #1833784 is a reply to message #1833783] |
Fri, 23 October 2020 17:39  |
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i still dont see the java code you want to generate.
i just see
- grammar
- sample model
- some generator code
but what is the code given the sample model you want to output
e.g.
package org.xtext.example.mydsl5.generator;
public class videodecl {
public static void main(String[] args) {
System.out.println("There is the video \"This is a vid\" with name oneVideo");
System.out.println("There is the video \"This is the second vid\" with name twoVideo");
System.out.println("There is the video \"This is another vid\" with name anotherVid");
System.out.println("playing oneVideo");
System.out.println("playing anotherVid");
}
}
Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/it-services/methods-and-tools/xtext
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Blog : https://www.dietrich-it.de
[Updated on: Fri, 23 October 2020 17:50] Report message to a moderator |
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| Re: xtend code [message #1833789 is a reply to message #1833788] |
Fri, 23 October 2020 18:37 |
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i still dont understand.
you show a java app and a use interacts with it
how does this relate to xtext generator.
if you use this
override void doGenerate(Resource resource, IFileSystemAccess2 fsa, IGeneratorContext context) {
fsa.generateFile('greetings.txt', '''
import java.util.Scanner;
public class grammarcode {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
String[] videos= new String[2];
// String[] actions;
System.out.println("Please enter the videos name to play");
for(int i=0;i<(videos.length);i++) {
videos[i]=input.nextLine();
}
System.out.println("video_list{");
for(int i=0;i<(videos.length);i++) {
System.out.println(videos[i] +";");
}
System.out.println("}");
System.out.println("actions{");
for(int i=0;i<(videos.length);i++){
System.out.println("show("+ videos[i]+ ");");
}
System.out.println("}");
}
}
''')
}
the generator will generate your java code
Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/it-services/methods-and-tools/xtext
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
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| Re: xtend code [message #1833791 is a reply to message #1833790] |
Fri, 23 October 2020 18:49 |
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i said: i can do if you tell me the java code which you want to generate for this model
video_list {
oneVideo = "This is a vid";
twoVideo = "This is the second vid";
anotherVid = "This is another vid";
}
actions {
show(oneVideo);
show(anotherVid);
}
i am asking you:
how shall the generated java code for this model file look like
you said
public class videodecl {
public static void main(String[] args) {
System.out.println("There is the video \"This is a vid\" with name oneVideo");
System.out.println("There is the video \"This is the second vid\" with name twoVideo");
System.out.println("There is the video \"This is another vid\" with name anotherVid");
System.out.println("playing oneVideo");
System.out.println("playing anotherVid");
}
}
is wrong.
so which code should be generated instead?
Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/it-services/methods-and-tools/xtext
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
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| Re: xtend code [message #1833795 is a reply to message #1833794] |
Fri, 23 October 2020 20:10 |
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that is easy
override void doGenerate(Resource resource, IFileSystemAccess2 fsa, IGeneratorContext context) {
for (m : resource.allContents.toIterable.filter(Model)) {
fsa.generateFile("video/videodecl.txt", '''
video_list{
«FOR v : m.parts.filter(Video)»
«FOR vd : v.videos»
name="«Strings.convertToJavaString(vd.value)»";
«ENDFOR»
«ENDFOR»
}
action{
«FOR u : m.parts.filter(Videouse)»
«FOR play : u.playvideo»
show(«play.vid.name»);
«ENDFOR»
«ENDFOR»
}
''')
}
}
but this aint java code that is generated
Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/it-services/methods-and-tools/xtext
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
[Updated on: Fri, 23 October 2020 20:11] Report message to a moderator |
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