Parsing ruby single-dimension hash from java

parse-ruby-sd-hash.java

import java.util.Map;
import java.util.HashMap;

public class ConvertRubySDHash {
    public static Map<String, String> convertToObject(String line) {
        Map<String, String> result = new HashMap<>();

        for (int i = 0; i < line.length(); i++) {
            while(i < line.length()) {
                if (line.charAt(i) == '=' && line.charAt(i + 1) == '>') {
                    int end = i - 1; // before last quote
                    int j = end - 1;

                    while(line.charAt(j) != '"') {
                        j--;
                    }

                    String key = line.substring(j + 1, end);

                    int quotesFind = 0;
                    int k;
                    for (k = i + 2; k < line.length(); k++) {
                        if (line.charAt(k) == '=' && line.charAt(k + 1) == '>') {
                            while (k >= 0) {
                                if (line.charAt(k) == '"' && ++quotesFind == 2) {
                                    k -= 2;
                                    break;
                                }

                                k--;
                            }
                        }

                        if (quotesFind == 2) {
                            break;
                        }
                    }

                    String value;
                    if (quotesFind < 2) {
                        value = line.substring(i + 2, line.length());
                    } else {
                        value = line.substring(i + 2, k);
                    }

                    if (value.startsWith("\"")) {
                        value = value.substring(1, value.length() - 1);
                    }

                    result.put(key, value.equals("nil") ? null : value);

                    i = k + 2;

                    continue;
                }

                i++;
            }
        }

        return result;
    }
}

Not sure how useful it would be for someone, but as I didn't find any implementation around, I've written my own. It might be suboptimal, but worked very well for me to convert rails seed files :)

Example of input:

"id"=>4, "lat"=>52.3765396, "lng"=>4.9008333, "year_from"=>1888, "year_to"=>1999