public void execute()

in src/main/java/org/apache/tomcat/jakartaee/Migration.java [232:261]
27 lines of code
8 McCabe index (conditional complexity)

    public void execute() throws IOException {
        if (state == State.RUNNING) {
            throw new IllegalStateException(sm.getString("migration.alreadyRunning"));
        }
        state = State.RUNNING;
        converted = false;

        logger.log(Level.INFO, sm.getString("migration.execute", source.getAbsolutePath(),
                destination.getAbsolutePath(), profile.toString()));

        long t1 = System.nanoTime();
        if (source.isDirectory()) {
            if ((destination.exists() && destination.isDirectory()) || destination.mkdirs()) {
                migrateDirectory(source, destination);
            } else {
                throw new IOException(sm.getString("migration.mkdirError", destination.getAbsolutePath()));
            }
        } else {
            // Single file`
            File parentDestination = destination.getAbsoluteFile().getParentFile();
            if (parentDestination.exists() || parentDestination.mkdirs()) {
                migrateFile(source, destination);
            } else {
                throw new IOException(sm.getString("migration.mkdirError", parentDestination.getAbsolutePath()));
            }
        }
        state = State.COMPLETE;
        logger.log(Level.INFO, sm.getString("migration.done",
                Long.valueOf(TimeUnit.MILLISECONDS.convert(System.nanoTime() - t1, TimeUnit.NANOSECONDS))));
    }