jackson failing to map empty array with No content to map to Object due to end of input
- by ijabz
I send a query to an api and map the json results to my classes using Jackson.
When I get some results it works fine, but when there are no results it fails with
java.io.EOFException: No content to map to Object due to end of input
at org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.java:2766)
at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2709)
at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1854)
at com.jthink.discogs.query.DiscogsServerQuery.mapQuery(DiscogsServerQuery.java:382)
at com.jthink.discogs.query.SearchQuery.mapQuery(SearchQuery.java:37)*
But the thing is the api isn't returning nothing at all, so I dont see why it is failing.
Here is the query:
http://api.discogs.com/database/search?page=1&type=release&release_title=nude+and+rude+the+best+of+iggy+pop
this is what I get back
{
"pagination": {
"per_page": 50,
"pages": 1,
"page": 1,
"urls": {},
"items": 0
},
"results": []
}
and here is the top level object Im trying to map to
public class Search
{
private Pagination pagination;
private Result[] results;
public Pagination getPagination() {
return pagination;
}
public void setPagination(Pagination pagination) {
this.pagination = pagination;
}
public Result[] getResults() {
return results;
}
public void setResults(Result[] results) {
this.results = results;
}
}
Im guessing the problem is something to do with the results array being returned being blank, but cant see what Im doing wrong
EDIT:
The comment below was correct, although I usually receive
{
"pagination": {
"per_page": 50,
"pages": 1,
"page": 1,
"urls": {},
"items": 0
},
"results": []
}
and in these cases there is no problem but sometimes I seem to just get an empty String. Now Im wondering if the problem is how I read from the inputstream
if (responseCode == HttpURLConnection.HTTP_OK)
InputStreamReader in= new InputStreamReader(uc.getInputStream());
BufferedReader br= new BufferedReader(in);
while(br.ready())
{
String next = br.readLine();
sb.append(next);
}
return sb.toString();
}
although I dont read until I get the response code, is it possible that the first time I call br.ready() that I call it before it is ready, and therefore I don't read the input
EDIT 2:
Changing above code to simply
String line;
while ((line = br.readLine()) != null)
{
sb.append(line);
}
resolved the issue.
