JavaPatternMatching/src/de/dhbwstuttgart/parser/JavaTXParser.java

package de.dhbwstuttgart.parser;

import de.dhbwstuttgart.environment.CompilationEnvironment;
import de.dhbwstuttgart.environment.JavaClassRegistry;
import de.dhbwstuttgart.parser.SyntaxTreeGenerator.SyntaxTreeGenerator;
import de.dhbwstuttgart.parser.antlr.Java8Lexer;
import de.dhbwstuttgart.parser.antlr.Java8Parser;
import de.dhbwstuttgart.syntaxtree.SourceFile;

import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CommonTokenStream;

import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;

public class JavaTXParser {
	CompilationEnvironment environment;
	
	public JavaTXParser(CompilationEnvironment env) {
		environment = env;
	}
	
    public SourceFile parse(InputStream source) throws IOException, java.lang.ClassNotFoundException {
        InputStream stream = source;//new FileInputStream(sourceFile);
        ANTLRInputStream input = new ANTLRInputStream(stream);
        Java8Lexer lexer = new Java8Lexer(input);
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        Java8Parser parser = new Java8Parser(tokens);
        Java8Parser.CompilationUnitContext tree = parser.compilationUnit();
        
        JavaClassRegistry reg = new JavaClassRegistry(new ArrayList<>());
        reg.addPackage("java.lang");
        SyntaxTreeGenerator generator = new SyntaxTreeGenerator(reg);
        return generator.convert(tree);
    }

    public SourceFile parse(File file) throws IOException, java.lang.ClassNotFoundException {
        return this.parse(new FileInputStream(file));
    }

    public SourceFile parse(String fileContent) throws IOException, java.lang.ClassNotFoundException {
        return this.parse(new ByteArrayInputStream(fileContent.getBytes(StandardCharsets.UTF_8)));
    }
}