package pl.edu.icm.saos.common.json;
import java.io.IOException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
* @author Łukasz Dumiszewski
*/
public class JsonNormalizer {
private static final ObjectMapper singleQuotedMapper = new ObjectMapper();
static {
singleQuotedMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
singleQuotedMapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
singleQuotedMapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
}
//------------------------ CONSTRUCTORS --------------------------
private JsonNormalizer() {
throw new IllegalStateException("may not be instantiated");
}
//------------------------ LOGIC --------------------------
/**
* Changes passed json into a standard double quoted one: replaces single quotes with double-quotes, adds
* double quotes for field names that are missing them, removes whitespaces and comments. <br/>
* Note: the element values of the passed json have to be in single or double quotes.<br/>
* <br/>
* E.g. <br/>
* {bre:'sss', arr:['1112'\n , 'abc']} into {"bre":"sss","arr":["1112","abc"]} <br/>
* Or <br/>
* {'bre':'sss', 'arr':['1112', 'abc']} into {"bre":"sss","arr":["1112","abc"]} <br/>
*
*
*/
public static String normalizeJson(String json) throws IllegalArgumentException {
JsonNode df = null;
try {
df = singleQuotedMapper.readValue(json, JsonNode.class);
} catch (IOException e) {
throw new IllegalArgumentException(e);
}
return df.toString();
}
}