How would I express XML tag attributes in JSON?

Question

I am designing an API for my webapp.

I was thinking to support only JSON responses (not XML) because more streamlined.

But I have just bumped to this XML:

Answer 1

I've ran into a scenario that needs both XML and JSON for input and output based on what was being passed in. I found a way that works with XML Attributes/Properties and JSON. Now note, it's how it coded in Java, makes it work this way.

My XML Example:

    05/05/2017 13:45:22
    2da236d2-3852-4a09-8067-198193d2828b
    This is my message

My JSON Example:

{
    "datetime":"05/05/2017 13:45:22",
    "sessionid":"2da236d2-3852-4a09-8067-198193d2828b",
    "message": {
        "content":"This is a testa",
        "msgType":"Debug"
    }
}

How I made it work via code Log.java:

package log;

import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement;

@JacksonXmlRootElement(localName = "Log")
public class Log {
    @JacksonXmlProperty(localName = "datetime")
    private String datetime;
    @JacksonXmlProperty(localName = "sessionid")
    private String sessionid;
    @JacksonXmlProperty(localName = "message")
    private Message message;

    public Log() {
        this.sessionid = "0";
        this.datetime = "";
        this.message = new Message();
    }

    public String getDatetime() {
        return datetime;
    }

    public void setDatetime(String datetime) {
        this.datetime = datetime;
    }

    public String getSessionid() {
        return sessionid;
    }

    public void setSessionid(String sessionid) {
        this.sessionid = sessionid;
    }

    public Message getMessage() {
        return message;
    }

    public void setMessage(Message message) {
        this.message = message;
    }
}

Message.java, Note the @JacksonXmlText below, which is key:

package log;

import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlText;

public class Message {
    @JacksonXmlProperty(localName = "msgType", isAttribute = true)
    private String msgType;
    @JacksonXmlText
    private String content;

    public Message() {
        this.content = "";
    }

    public String getMsgType() {
        return msgType;
    }

    public void setMsgType(String msgType) {
        switch(msgType.toLowerCase())
        {
        case "test":
        case "debug":
        case "warn":
        case "error":
            break;
        default:
            msgType = "Unknown";
            break;
        }

        this.msgType = msgType;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }
}

Caller within LogController.java:

..
@RequestMapping(value = "/Logger", produces={"application/xml", "application/json"}, consumes={"application/xml", "application/json"})
public ResponseEntity Logger(@RequestBody String logInfo, @RequestHeader("Content-Type") String contentType) {
    try 
    {
        String xml = "";
        Log logObj = null; 
        HttpHeaders responseHeaders = new HttpHeaders();
        responseHeaders.add("Content-Type", contentType);

        if (contentType.toLowerCase().contains("json"))
        {
           ObjectMapper mapper = new ObjectMapper();
           logObj = mapper.readValue(logInfo, Log.class);
           xml = mapper.writeValueAsString(logObj);
        }
        else if (contentType.toLowerCase().contains("xml"))
        {
           XmlMapper xmlMapper = new XmlMapper();
           logObj = xmlMapper.readValue(logInfo, Log.class);
           xml = xmlMapper.writeValueAsString(logObj);
        }
        else
           return new ResponseEntity(HttpStatus.BAD_REQUEST);

        //TODO GWL
        //Save Log data, via Async Web Service, Data, or System 
        return new ResponseEntity(xml, responseHeaders, HttpStatus.OK);
    } 
    catch( Exception ex)
    {
        ex.printStackTrace();
        return new ResponseEntity(HttpStatus.BAD_REQUEST);
    }
}