core: fix method redecompilation (issue #6)

jadx-core/src/main/java/jadx/api/Decompiler.java

@@ -110,17 +110,14 @@ public final class Decompiler {
 		int threadsCount = args.getThreadsCount();
 		LOG.debug("processing threads count: {}", threadsCount);
 
-		final List<IDexTreeVisitor> passList = new ArrayList<IDexTreeVisitor>(passes);
-		SaveCode savePass = new SaveCode(outDir, args);
-		passList.add(savePass);
-
 		LOG.info("processing ...");
 		ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(threadsCount);
-		for (final ClassNode cls : root.getClasses(false)) {
+		for (final JavaClass cls : getClasses()) {
 			executor.execute(new Runnable() {
 				@Override
 				public void run() {
-					ProcessClass.process(cls, passList);
+					cls.decompile();
+					SaveCode.save(outDir, args, cls.getClassNode());
 				}
 			});
 		}

jadx-core/src/main/java/jadx/core/dex/nodes/MethodNode.java

@@ -118,6 +118,7 @@ public class MethodNode extends LineAttrNode implements ILoadable {
 				noCode = true;
 				// load without code
 				load();
+				noCode = false;
 			}
 			throw new DecodeException(this, "Load method exception", e);
 		}
@@ -141,7 +142,6 @@ public class MethodNode extends LineAttrNode implements ILoadable {
 		blocks = null;
 		exitBlocks = null;
 		exceptionHandlers.clear();
-		noCode = true;
 	}
 
 	private boolean parseSignature() {

jadx-core/src/main/java/jadx/core/dex/visitors/SaveCode.java

@@ -18,13 +18,16 @@ public class SaveCode extends AbstractVisitor {
 
 	@Override
 	public boolean visit(ClassNode cls) throws CodegenException {
-		CodeWriter clsCode = cls.getCode();
+		save(dir, args, cls);
+		return false;
+	}
 
+	public static void save(File dir, IJadxArgs args, ClassNode cls) {
+		CodeWriter clsCode = cls.getCode();
 		String fileName = cls.getClassInfo().getFullPath() + ".java";
 		if (args.isFallbackMode()) {
 			fileName += ".jadx";
 		}
 		clsCode.save(dir, fileName);
-		return false;
 	}
 }