CODEWITHSUNDEEP
javajson
Menderez Albano
Menderez Albano

Reputation: 21

JSONValue cannot be convert to JSONObject

I'm fairly new to Java and I'm trying to write an Iterator for my JSON-file. But it keeps telling me that "incompatible types: JSONValue cannot be convert to JSONObject" at JSONObject authorNode = (JSONObject) authors.next();

import java.util.Iterator;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;
import mende.entity.Author;


public class JSONIteratorAuthor implements Iterator <Author> {

    private Iterator<JSONValue> authors;

    public JSONIteratorAuthor(JSONObject jsonObject){
        this.authors = ((JSONArray) jsonObject.get("authors")).iterator();
    }

    @Override
    public boolean hasNext() {
        return this.authors.hasNext();
    }

    public Author next() {
        if(this.hasNext()){
            Author a = new Author();
            JSONObject authorNode = (JSONObject) authors.next();
            a.setFirstName((String) authorNode.get("first_name"));
            a.setLastName((String) authorNode.get("last_name"));
            return a;
        }
        else {
            return null;
        }
    }    
}

Can someone help me?

Upvotes: 2

Views: 1691

Answers (1)

dave823
dave823

Reputation: 1211

authors.next(); returns an object of type JSONValue

private Iterator<JSONValue> authors;

But you are trying to cast it to an incompatible type (JSONObject)

JSONObject authorNode = (JSONObject) authors.next();

I would guess that your Iterator<JSONValue> should instead be Iterator<JSONObject> .

Upvotes: 2

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