Fixed an issue of DeviceType and DeviceIdentifier. Implemented the getDeviceType method

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceTypeDAO.java

@@ -17,7 +17,6 @@
  */
 package org.wso2.carbon.device.mgt.core.dao;
 
-import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.core.dto.DeviceType;
 
 import java.util.List;
@@ -33,7 +32,7 @@ public interface DeviceTypeDAO {
 
     List<DeviceType> getDeviceTypes() throws DeviceManagementDAOException;
 
-    DeviceIdentifier getDeviceType() throws DeviceManagementDAOException;
+    DeviceType getDeviceType(Integer id) throws DeviceManagementDAOException;
 
     Integer getDeviceTypeIdByDeviceTypeName(String type) throws DeviceManagementDAOException;
 

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/DeviceTypeDAOImpl.java

@@ -19,7 +19,6 @@ package org.wso2.carbon.device.mgt.core.dao.impl;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException;
 import org.wso2.carbon.device.mgt.core.dao.DeviceTypeDAO;
 import org.wso2.carbon.device.mgt.core.dao.util.DeviceManagementDAOUtil;
@@ -90,9 +89,28 @@ public class DeviceTypeDAOImpl implements DeviceTypeDAO {
     }
 
     @Override
-    public DeviceIdentifier getDeviceType() throws DeviceManagementDAOException {
+    public DeviceType getDeviceType(Integer id) throws DeviceManagementDAOException {
-        //TODO:
+        Connection conn = this.getConnection();
-        return null;
+        PreparedStatement stmt = null;
+        DeviceType deviceType = null;
+        try {
+            stmt = conn.prepareStatement("SELECT ID AS DEVICE_TYPE_ID, NAME AS DEVICE_TYPE FROM DM_DEVICE_TYPE WHERE ID=?");
+            stmt.setInt(1, id);
+            ResultSet results = stmt.executeQuery();
+
+            while (results.next()) {
+                deviceType = new DeviceType();
+                deviceType.setId(results.getLong("DEVICE_TYPE_ID"));
+                deviceType.setName(results.getString("DEVICE_TYPE"));
+            }
+        } catch (SQLException e) {
+            String msg = "Error occurred while fetching the registered device type";
+            log.error(msg, e);
+            throw new DeviceManagementDAOException(msg, e);
+        } finally {
+            DeviceManagementDAOUtil.cleanupResources(conn, stmt, null);
+        }
+        return deviceType;
     }
 
     @Override