JpaTocFixer.java

import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class JpaTocFixer {


    public static void main(String[] args) throws Exception {
        String toc = new String(Files.readAllBytes(Paths.get("/Users/stuart/jpatoc.txt")), StandardCharsets.UTF_8);
        Pattern tocPatters = Pattern.compile("((\\d+\\.?)+) ([^\\.\\d]+)");
        Matcher m = tocPatters.matcher(toc);
        Map<String, Deque<Integer>> found = new HashMap<>();
        while (m.find()) {
            String group = m.group(3).replace("\n", " ").trim();
            Deque<Integer> list = found.computeIfAbsent(group, s -> new ArrayDeque<>());
            int count = 0;
            for (char i : m.group(1).toCharArray()) {
                if (i == '.') {
                    count++;
                }
            }
            list.add(count);
        }

        String file = "/Users/stuart/workspace/jpa-api/spec/src/main/asciidoc/spec.adoc";
        Path path = Paths.get(file);
        String document = new String(Files.readAllBytes(path), StandardCharsets.UTF_8);
        StringBuilder sb = new StringBuilder();
        Pattern p = Pattern.compile("=== (\\[\\[\\w+]])?(.*)");
        m = p.matcher(document);
        int last = 0;
        while (m.find()) {
            sb.append(document, last, m.start());
            last = m.end();

            Deque<Integer> list = found.get(m.group(2));
            System.out.println(list + m.group());
            if (list == null) {
                sb.append("[discrete]\n");
                sb.append(m.group());
            } else {
                sb.append("==");
                int val = list.pop();
                if(list.isEmpty()){
                    found.remove(m.group(2));
                }
                for (int i = 0;i < val; ++i){
                    sb.append("=");
                }
                sb.append(" ");
                if (m.group(1) != null){
                    sb.append(m.group(1));
                }
                sb.append(m.group(2));
            }

        }
        sb.append(document, last, document.length());

        Files.write(path, sb.toString().getBytes(StandardCharsets.UTF_8));

    }
}