Added a method to retrieve list of applications installed on a device

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

@@ -75,5 +75,22 @@ public interface DeviceDAO {
      */
     List<Device> getDevicesByName(String deviceName, int tenantId) throws DeviceManagementDAOException;
 
+	/**
+	 * Get the list of devices that matches with the given device name.
+	 *
+	 * @param id Name of the device
+	 * @param applications List of applications
+	 * @throws DeviceManagementDAOException
+	 */
     void addDeviceApplications(int id, Object applications)  throws DeviceManagementDAOException;
+
+	/**
+	 * Get the list of devices that matches with the given device name.
+	 *
+	 * @param deviceId device id of the device
+	 * @return List of Applications that are installed on the given device.
+	 * @throws DeviceManagementDAOException
+	 */
+	List<Application> getInstalledApplications(int deviceId)
+			throws DeviceManagementDAOException;
 }

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

@@ -18,6 +18,8 @@
 
 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.Device;
 import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.common.EnrolmentInfo;
@@ -29,7 +31,11 @@ import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOFactory;
 import org.wso2.carbon.device.mgt.core.dao.util.DeviceManagementDAOUtil;
 import org.wso2.carbon.device.mgt.core.dto.DeviceType;
+import org.wso2.carbon.device.mgt.core.dto.operation.mgt.ProfileOperation;
 
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
@@ -40,6 +46,8 @@ import java.util.List;
 
 public class DeviceDAOImpl implements DeviceDAO {
 
+    private static final Log log = LogFactory.getLog(DeviceDAOImpl.class);
+
     @Override
     public void addDevice(int typeId, Device device, int tenantId) throws DeviceManagementDAOException {
         Connection conn;
@@ -317,6 +325,50 @@ public class DeviceDAOImpl implements DeviceDAO {
         }
     }
 
+    @Override
+    public List<Application> getInstalledApplications(int deviceId)
+            throws DeviceManagementDAOException {
+        Connection conn;
+        PreparedStatement stmt = null;
+        List<Application> applications = new ArrayList<Application>();
+        Application application;
+        ByteArrayInputStream bais;
+        ObjectInputStream ois;
+
+        try {
+            conn = this.getConnection();
+            stmt = conn.prepareStatement(
+                    "SELECT DEVICE_ID, APPLICATIONS FROM DM_DEVICE_APPLICATIONS WHERE DEVICE_ID = ?");
+            stmt.setInt(1, deviceId);
+            ResultSet rs = stmt.executeQuery();
+
+            while (rs.next()) {
+                byte[] applicationDetails = rs.getBytes("APPLICATIONS");
+                bais = new ByteArrayInputStream(applicationDetails);
+                ois = new ObjectInputStream(bais);
+                application = (Application) ois.readObject();
+                applications.add(application);
+            }
+
+        }catch (IOException e) {
+            String errorMsg = "IO Error occurred while de serialize the Application object";
+            log.error(errorMsg, e);
+            throw new DeviceManagementDAOException(errorMsg, e);
+        } catch (ClassNotFoundException e) {
+            String errorMsg = "Class not found error occurred while de serialize the Application object";
+            log.error(errorMsg, e);
+            throw new DeviceManagementDAOException(errorMsg, e);
+        } catch (SQLException e) {
+            String errorMsg = "SQL Error occurred while retrieving the list of Applications installed in device id '"
+                              + deviceId;
+            log.error(errorMsg, e);
+            throw new DeviceManagementDAOException(errorMsg, e);
+        } finally {
+            DeviceManagementDAOUtil.cleanupResources(stmt, null);
+        }
+        return applications;
+    }
+
     private Device loadDevice(ResultSet rs) throws SQLException {
 
         Device device = new Device();

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderService.java

@@ -82,7 +82,7 @@ public interface DeviceManagementProviderService extends DeviceManager, LicenseM
      * The method to get application list installed for the device.
      *
      * @param deviceIdentifier
-     * @return
+     * @return List of applications installed on the device
      * @throws DeviceManagementException
      */
     List<Application> getApplicationListForDevice(DeviceIdentifier deviceIdentifier) throws DeviceManagementException;

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java

@@ -648,7 +648,15 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
     @Override
     public List<Application> getApplicationListForDevice(DeviceIdentifier deviceIdentifier)
             throws DeviceManagementException {
-        return null;
+        Device device = null;
+        try {
+            device = this.getDevice(deviceIdentifier);
+            return deviceDAO.getInstalledApplications(device.getId());
+        }catch (DeviceManagementDAOException deviceDaoEx){
+            String errorMsg = "Error occured while fetching the Application List of device  : " + device.getId();
+            log.error(errorMsg, deviceDaoEx);
+            throw new DeviceManagementException(errorMsg, deviceDaoEx);
+        }
     }
 
     @Override