Created
October 22, 2017 21:01
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Parsing ruby single-dimension hash from java
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| 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; | |
| } | |
| } |
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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