add main class

src/main/java/StupsCompiler.java

@@ -1,6 +1,63 @@
-public class StupsCompiler {
+import lexer.StupsLexer;
+import org.antlr.v4.runtime.CharStreams;
+import org.antlr.v4.runtime.Lexer;
+import parser.LL1Parser;
+import parser.grammar.Grammar;
+
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+
+public final class StupsCompiler {
+
+    private StupsCompiler() {}
 
     public static void main(String[] args) {
-        System.out.println("StupsCompiler");
+        System.out.println("StupsCompiler: " + Arrays.toString(args) + "\n");
+
+        if (args.length != 2) {
+            System.out.println("Falsche Argumente.");
+            return;
+        }
+
+        switch (args[0]) {
+            case "-compile" -> compile(args[1]);
+            case "-liveness" -> liveness(args[1]);
+            default -> System.out.println("Falsche Argumente.");
+        }
+    }
+
+    private static void compile(String filename) {
+        System.out.println("Beginning compilation.");
+
+        Lexer lexer;
+        try {
+            Path programPath = Paths.get(System.getProperty("user.dir") + "/" + filename);
+            lexer = new StupsLexer(CharStreams.fromPath(programPath));
+        } catch (IOException e) {
+            System.out.println("Das Programm konnte nicht gelesen werden.");
+            return;
+        }
+
+        Grammar grammar;
+        try {
+            Path grammarFile = Paths.get(StupsCompiler.class.getResource("Grammar.grammar").toURI());
+            grammar = Grammar.fromFile(grammarFile);
+        } catch (IOException | URISyntaxException e) {
+            System.out.println("Die Grammatik konnte nicht geöffnet werden.");
+            return;
+        }
+
+        LL1Parser parser = LL1Parser.fromGrammar(grammar);
+
+        parser.parse(lexer.getAllTokens(), lexer.getVocabulary());
+
+        System.out.println("Compilation completed.");
+    }
+
+    private static void liveness(String filename) {
+        System.out.println("Liveness-Analyse für " + filename);
     }
 }