returning MyBatis resultMap as map - spring

Question

I have a mybatis resultMap refer to a POJO class as like below.
<resultMap id="FolderResultMap" type="Folder">
<result column="recordcount" property="recordCount" />
<result column="contenttype" property="folderContentType" />
<result column="folderid" property="folderId" />
<result column="folderdesc" property="folderDescription" />
<result column="foldername" property="folderName" />
<result column="foldertype" property="folderType" />
</resultMap>
<select id="findReportFolders" resultMap="FolderResultMap">
some query
</select>
And in my Mapper interface
List<Folder> findReportFolders (#Param("name") long id,
#Param("id2") long busid);
Because of this i am getting JSON response as list of objects where i need map of list of objects as below mentioned.
{
"folders": [
{
"recordCount": 7,
"folderContentType": "Reports",
"folderId": 139491,
"folderDescription": null,
"folderName": "AA_TestPrivateFolder1234",
"folderType": "CUSTOM",
"refreshable": true
},
{
"recordCount": 35,
"folderContentType": "Reports",
"folderId": 140109,
"folderDescription": "Default Folder for New Reports",
"folderName": "label.privateReportInboxOverrideName",
"folderType": "INBOX",
"refreshable": true
}]
}
This what i am getting now. I would like to get the response as above.
[{"folderId":359056,"folderName":"BE Shared Report Inbox","folderDescription":"BE Shared Report Inbox","folderType":"INBOX","folderContentType":"SharedReports","recordCount":0,"refreshable":true},{"folderId":363984,"folderName":"Default Inbox Folder","folderDescription":"Default Folder for New Reports","folderType":"INBOX","folderContentType":"Reports","recordCount":0,"refreshable":true}]
Any Idea how can i do this?

Answer 1

Nothing in your example JSON requires a Map of anything.
Instead,
create an object hierarchy that represents the JSON structure that you need and use Jackson (or some other JSON library) to generate the JSON.
Here is some example code that uses Jackson:
package blam.won;
import com.fasterxml.jackson.annotation.JsonProperty;
public class Blam
{
#JsonProperty
private String folderContentType;
#JsonProperty
private int recordCount;
public void setFolderContentType(
final String newValue)
{
folderContentType = newValue;
}
public void setRecordCount(
final int newValue)
{
recordCount = newValue;
}
}
package blam.won;
import java.util.List;
import com.fasterxml.jackson.annotation.JsonProperty;
public class Kapow
{
#JsonProperty("folders")
private List<Blam> blamList;
public void setBlamList(
final List<Blam> newValue)
{
blamList = newValue;
}
}
package blam.won;
import java.util.LinkedList;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
public class TestWon
{
private ObjectMapper objectMapper;
#Before
public void preTestSetup()
{
objectMapper = new ObjectMapper();
}
#Test
public void testKapow()
throws JsonProcessingException
{
final Blam blam1 = new Blam();
final Blam blam2 = new Blam();
final List<Blam> blamList = new LinkedList<>();
final String jsonString;
final Kapow kapow = new Kapow();
blam1.setFolderContentType("Reports");
blam1.setRecordCount(7);
blamList.add(blam1);
blam2.setFolderContentType("Reports");
blam2.setRecordCount(35);
blamList.add(blam2);
kapow.setBlamList(blamList);
jsonString = objectMapper.writeValueAsString(kapow);
System.out.println(jsonString);
}
}