| Separate java application that parses a file [message #1806941] |
Sat, 18 May 2019 10:26  |
Eclipse User |
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sorry for the trivial question...
I've read the XText getting started documentation, I've found any kind of thing, but not the answer to one very simple question.
i've created a new XText project, a new grammar, processed it, everything's OK !
but now
I do not need to work inside Ecplise (code completions, highlighting, and so on)
I need to run a Java software that reads a file that follows my grammar and parse (or execute it).
I've done the same using directly ANTLR4 and g4 grammars --> everything OK.
public static void main(String[] args) throws Exception {
if (args==null || args.length == 0) {
args = new String[]{"src/testfile"};
}
TestLexer lexer = new TestLexer(new ANTLRFileStream(args[0]));
TestParser parser = new TestParser(new CommonTokenStream(lexer));
ParseTree tree = parser.parse();
EvalVisitor visitor = new EvalVisitor();
visitor.visit(tree);
}
can someone help me to do the same with the classes generated in a XText Eclipse project ?
thanks in advance
Andrea
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| Re: Separate java application that parses a file [message #1807148 is a reply to message #1806941] |
Thu, 23 May 2019 13:35  |
| Eclipse User |
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this snippet may help you to build such an app
import java.io.IOException;
import java.util.List;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.xtext.util.CancelIndicator;
import org.eclipse.xtext.validation.CheckMode;
import org.eclipse.xtext.validation.IResourceValidator;
import org.eclipse.xtext.validation.Issue;
import com.google.inject.Injector;
public class Main {
public static void main(String[] args) throws IOException {
Injector injector = new MyDslStandaloneSetup().createInjectorAndDoEMFRegistration();
ResourceSet rs = injector.getInstance(ResourceSet.class);
Resource resource = rs.getResource(URI.createURI("test.mydsl"), true);
resource.load(null);
IResourceValidator validator = injector.getInstance(IResourceValidator.class);
List<Issue> issues = validator.validate(resource,
CheckMode.ALL, CancelIndicator.NullImpl);
for (Issue issue: issues) {
switch (issue.getSeverity()) {
case ERROR:
System.out.println("ERROR: " + issue.getMessage());
case WARNING:
System.out.println("WARNING: " + issue.getMessage());
}
}
}
}
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