From 0bd2a46690d6beb4968e9ba6b04bbc3f4286289e Mon Sep 17 00:00:00 2001 From: dilanua Date: Wed, 1 Jun 2016 15:58:45 +0530 Subject: [PATCH] Adding H2/MSSQL/ORACLE/POSTGRESQL support for GET /admin/devices API --- .../impl/DeviceManagementServiceImpl.java | 5 +- .../DeviceManagementAdminServiceImpl.java | 15 +++-- .../mgt/jaxrs/util/DeviceMgtAPIUtils.java | 5 +- .../carbon/device/mgt/core/dao/DeviceDAO.java | 3 +- .../core/dao/impl/AbstractDeviceDAOImpl.java | 65 ------------------- .../dao/impl/device/GenericDeviceDAOImpl.java | 65 +++++++++++++++++++ .../dao/impl/device/OracleDeviceDAOImpl.java | 65 +++++++++++++++++++ .../impl/device/PostgreSQLDeviceDAOImpl.java | 65 +++++++++++++++++++ .../impl/device/SQLServerDeviceDAOImpl.java | 65 +++++++++++++++++++ 9 files changed, 276 insertions(+), 77 deletions(-) diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/DeviceManagementServiceImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/DeviceManagementServiceImpl.java index b9e181745a..d7065e0878 100644 --- a/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/DeviceManagementServiceImpl.java +++ b/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/DeviceManagementServiceImpl.java @@ -272,10 +272,11 @@ public class DeviceManagementServiceImpl implements DeviceManagementService { throw new UnexpectedServerErrorException( new ErrorResponse.ErrorResponseBuilder().setCode(500l).setMessage(msg).build()); } - if (devices == null) { + if (devices == null || devices.size() == 0) { return Response.status(Response.Status.NOT_FOUND).entity("It is likely that no device is found upon " + - "the provided type and id").build(); + "the provided search filters").build(); } + return Response.status(Response.Status.OK).entity(devices).build(); } diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java index 6400e59821..46f80d18bf 100644 --- a/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java +++ b/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java @@ -56,30 +56,31 @@ public class DeviceManagementAdminServiceImpl implements DeviceManagementAdminSe int currentTenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId(); if (MultitenantConstants.SUPER_TENANT_ID != currentTenantId) { throw new UnauthorizedAccessException( - new ErrorResponse.ErrorResponseBuilder().setCode(401l).setMessage( - "Current logged in user is not authorized to perform this operation").build()); + new ErrorResponse.ErrorResponseBuilder().setCode(401l).setMessage( + "Current logged in user is not authorized to perform this operation").build()); } PrivilegedCarbonContext.startTenantFlow(); PrivilegedCarbonContext.getThreadLocalCarbonContext().setTenantDomain(tenantDomain); PrivilegedCarbonContext.getThreadLocalCarbonContext().setTenantId(DeviceMgtAPIUtils.getTenantId(tenantDomain)); List devices = DeviceMgtAPIUtils.getDeviceManagementService(). - getDevicesByNameAndType(name, type, offset, limit); - if (devices == null) { + getDevicesByNameAndType(name, type, offset, limit); + if (devices == null || devices.size() == 0) { return Response.status(Response.Status.NOT_FOUND).entity("No device, which carries the name '" + - name + "', is currently enrolled in the system").build(); + name + "', is currently enrolled in the system").build(); } + // setting up paginated result DeviceList deviceList = new DeviceList(); - deviceList.setCount(devices.size()); deviceList.setList(devices); + deviceList.setCount(devices.size()); return Response.status(Response.Status.OK).entity(deviceList).build(); } catch (DeviceManagementException e) { String msg = "Error occurred at server side while fetching device list."; log.error(msg, e); throw new UnexpectedServerErrorException( - new ErrorResponse.ErrorResponseBuilder().setCode(500l).setMessage(msg).build()); + new ErrorResponse.ErrorResponseBuilder().setCode(500l).setMessage(msg).build()); } finally { PrivilegedCarbonContext.endTenantFlow(); } diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/util/DeviceMgtAPIUtils.java b/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/util/DeviceMgtAPIUtils.java index 9f273b63b1..d9c998c622 100644 --- a/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/util/DeviceMgtAPIUtils.java +++ b/components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/util/DeviceMgtAPIUtils.java @@ -252,12 +252,13 @@ public class DeviceMgtAPIUtils { RealmService realmService = (RealmService) PrivilegedCarbonContext.getThreadLocalCarbonContext().getOSGiService(RealmService.class, null); if (realmService == null) { - throw new IllegalStateException(""); + throw new IllegalStateException("Realm service has not been initialized."); } try { return realmService.getTenantManager().getTenantId(tenantDomain); } catch (UserStoreException e) { - throw new DeviceManagementException(""); + throw new DeviceManagementException("Error occured while trying to " + + "obtain tenant id of currently logged in user"); } } diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java index a65f40db65..ae7fd00de2 100644 --- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java +++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java @@ -259,7 +259,8 @@ public interface DeviceDAO { * @return returns list of devices. * @throws DeviceManagementDAOException */ - List getDevicesByNameAndType(String deviceName, String type, int tenantId, int offset, int limit) throws DeviceManagementDAOException; + List getDevicesByNameAndType(String deviceName, String type, int tenantId, int offset, int limit) + throws DeviceManagementDAOException; /** * This method is used to retrieve devices of a given device name as a paginated result. diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java index 0bc4d83f64..96dce585c2 100644 --- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java +++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java @@ -619,71 +619,6 @@ public abstract class AbstractDeviceDAOImpl implements DeviceDAO { return deviceCount; } - /** - * Get the list of devices that matches with the given device name. - * - * @param deviceName Name of the device. - * @param tenantId Id of the current tenant - * @return device list - * @throws DeviceManagementDAOException - */ - @Override - public List getDevicesByNameAndType(String deviceName, String type, int tenantId, int offset, int limit) - throws DeviceManagementDAOException { - - String filteringString = ""; - if (deviceName != null && !deviceName.isEmpty()) { - filteringString = filteringString + " AND d.NAME LIKE ?"; - } - - if (type != null && !type.isEmpty()) { - filteringString = filteringString + " AND t.NAME = ?"; - } - - Connection conn; - PreparedStatement stmt = null; - List devices = new ArrayList<>(); - ResultSet rs = null; - try { - conn = this.getConnection(); - String sql = "SELECT d1.ID AS DEVICE_ID, d1.DESCRIPTION, d1.NAME AS DEVICE_NAME, d1.DEVICE_TYPE, " + - "d1.DEVICE_IDENTIFICATION, e.OWNER, e.OWNERSHIP, e.STATUS, e.DATE_OF_LAST_UPDATE, " + - "e.DATE_OF_ENROLMENT, e.ID AS ENROLMENT_ID FROM DM_ENROLMENT e, (SELECT d.ID, d.NAME, " + - "d.DESCRIPTION, d.DEVICE_IDENTIFICATION, t.NAME AS DEVICE_TYPE FROM DM_DEVICE d, " + - "DM_DEVICE_TYPE t WHERE d.DEVICE_TYPE_ID = t.ID AND d.TENANT_ID = ?" + filteringString + - ") d1 WHERE d1.ID = e.DEVICE_ID LIMIT ?, ?"; - - stmt = conn.prepareStatement(sql); - stmt.setInt(1, tenantId); - - int i = 1; - - if (deviceName != null && !deviceName.isEmpty()) { - stmt.setString(++i, deviceName + "%"); - } - - if (type != null && !type.isEmpty()) { - stmt.setString(++i, type); - } - - stmt.setInt(++i, offset); - stmt.setInt(++i, limit); - - rs = stmt.executeQuery(); - - while (rs.next()) { - Device device = DeviceManagementDAOUtil.loadDevice(rs); - devices.add(device); - } - } catch (SQLException e) { - throw new DeviceManagementDAOException("Error occurred while fetching the list of devices that matches " + - "'" + deviceName + "'", e); - } finally { - DeviceManagementDAOUtil.cleanupResources(stmt, rs); - } - return devices; - } - @Override public int addEnrollment(Device device, int tenantId) throws DeviceManagementDAOException { Connection conn; diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/GenericDeviceDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/GenericDeviceDAOImpl.java index e009fd6343..d10b7e9d99 100644 --- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/GenericDeviceDAOImpl.java +++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/GenericDeviceDAOImpl.java @@ -303,6 +303,71 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl { return devices; } + /** + * Get the list of devices that matches with the given device name and (or) device type. + * + * @param deviceName Name of the device. + * @param tenantId Id of the current tenant + * @return device list + * @throws DeviceManagementDAOException + */ + @Override + public List getDevicesByNameAndType(String deviceName, String type, int tenantId, int offset, int limit) + throws DeviceManagementDAOException { + + String filteringString = ""; + if (deviceName != null && !deviceName.isEmpty()) { + filteringString = filteringString + " AND d.NAME LIKE ?"; + } + + if (type != null && !type.isEmpty()) { + filteringString = filteringString + " AND t.NAME = ?"; + } + + Connection conn; + PreparedStatement stmt = null; + List devices = new ArrayList<>(); + ResultSet rs = null; + try { + conn = this.getConnection(); + String sql = "SELECT d1.ID AS DEVICE_ID, d1.DESCRIPTION, d1.NAME AS DEVICE_NAME, d1.DEVICE_TYPE, " + + "d1.DEVICE_IDENTIFICATION, e.OWNER, e.OWNERSHIP, e.STATUS, e.DATE_OF_LAST_UPDATE, " + + "e.DATE_OF_ENROLMENT, e.ID AS ENROLMENT_ID FROM DM_ENROLMENT e, (SELECT d.ID, d.NAME, " + + "d.DESCRIPTION, d.DEVICE_IDENTIFICATION, t.NAME AS DEVICE_TYPE FROM DM_DEVICE d, " + + "DM_DEVICE_TYPE t WHERE d.DEVICE_TYPE_ID = t.ID AND d.TENANT_ID = ?" + filteringString + + ") d1 WHERE d1.ID = e.DEVICE_ID LIMIT ?, ?"; + + stmt = conn.prepareStatement(sql); + stmt.setInt(1, tenantId); + + int i = 1; + + if (deviceName != null && !deviceName.isEmpty()) { + stmt.setString(++i, deviceName + "%"); + } + + if (type != null && !type.isEmpty()) { + stmt.setString(++i, type); + } + + stmt.setInt(++i, offset); + stmt.setInt(++i, limit); + + rs = stmt.executeQuery(); + + while (rs.next()) { + Device device = DeviceManagementDAOUtil.loadDevice(rs); + devices.add(device); + } + } catch (SQLException e) { + throw new DeviceManagementDAOException("Error occurred while fetching the list of devices corresponding" + + "to the mentioned filtering criteria", e); + } finally { + DeviceManagementDAOUtil.cleanupResources(stmt, rs); + } + return devices; + } + private Connection getConnection() throws SQLException { return DeviceManagementDAOFactory.getConnection(); } diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/OracleDeviceDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/OracleDeviceDAOImpl.java index bc8756710c..7d2f874dd5 100644 --- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/OracleDeviceDAOImpl.java +++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/OracleDeviceDAOImpl.java @@ -310,6 +310,71 @@ public class OracleDeviceDAOImpl extends AbstractDeviceDAOImpl { return devices; } + /** + * Get the list of devices that matches with the given device name and (or) device type. + * + * @param deviceName Name of the device. + * @param tenantId Id of the current tenant + * @return device list + * @throws DeviceManagementDAOException + */ + @Override + public List getDevicesByNameAndType(String deviceName, String type, int tenantId, int offset, int limit) + throws DeviceManagementDAOException { + + String filteringString = ""; + if (deviceName != null && !deviceName.isEmpty()) { + filteringString = filteringString + " AND d.NAME LIKE ?"; + } + + if (type != null && !type.isEmpty()) { + filteringString = filteringString + " AND t.NAME = ?"; + } + + Connection conn; + PreparedStatement stmt = null; + List devices = new ArrayList<>(); + ResultSet rs = null; + try { + conn = this.getConnection(); + String sql = "SELECT * FROM (SELECT ROWNUM offset, rs.* FROM (SELECT d1.ID AS DEVICE_ID, d1.DESCRIPTION, " + + "d1.NAME AS DEVICE_NAME, d1.DEVICE_TYPE, d1.DEVICE_IDENTIFICATION, e.OWNER, e.OWNERSHIP, e.STATUS, " + + "e.DATE_OF_LAST_UPDATE, e.DATE_OF_ENROLMENT, e.ID AS ENROLMENT_ID FROM DM_ENROLMENT e, " + + "(SELECT d.ID, d.NAME, d.DESCRIPTION, d.DEVICE_IDENTIFICATION, t.NAME AS DEVICE_TYPE FROM " + + "DM_DEVICE d, DM_DEVICE_TYPE t WHERE d.DEVICE_TYPE_ID = t.ID AND d.TENANT_ID = ?" + filteringString + + ") d1 WHERE d1.ID = e.DEVICE_ID) rs) WHERE offset >= ? AND ROWNUM <= ?"; + + stmt = conn.prepareStatement(sql); + stmt.setInt(1, tenantId); + + int i = 1; + + if (deviceName != null && !deviceName.isEmpty()) { + stmt.setString(++i, deviceName + "%"); + } + + if (type != null && !type.isEmpty()) { + stmt.setString(++i, type); + } + + stmt.setInt(++i, offset); + stmt.setInt(++i, limit); + + rs = stmt.executeQuery(); + + while (rs.next()) { + Device device = DeviceManagementDAOUtil.loadDevice(rs); + devices.add(device); + } + } catch (SQLException e) { + throw new DeviceManagementDAOException("Error occurred while fetching the list of devices corresponding" + + "to the mentioned filtering criteria", e); + } finally { + DeviceManagementDAOUtil.cleanupResources(stmt, rs); + } + return devices; + } + private Connection getConnection() throws SQLException { return DeviceManagementDAOFactory.getConnection(); } diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/PostgreSQLDeviceDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/PostgreSQLDeviceDAOImpl.java index 00ed10661b..878e310742 100644 --- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/PostgreSQLDeviceDAOImpl.java +++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/PostgreSQLDeviceDAOImpl.java @@ -303,6 +303,71 @@ public class PostgreSQLDeviceDAOImpl extends AbstractDeviceDAOImpl { return devices; } + /** + * Get the list of devices that matches with the given device name and (or) device type. + * + * @param deviceName Name of the device. + * @param tenantId Id of the current tenant + * @return device list + * @throws DeviceManagementDAOException + */ + @Override + public List getDevicesByNameAndType(String deviceName, String type, int tenantId, int offset, int limit) + throws DeviceManagementDAOException { + + String filteringString = ""; + if (deviceName != null && !deviceName.isEmpty()) { + filteringString = filteringString + " AND d.NAME LIKE ?"; + } + + if (type != null && !type.isEmpty()) { + filteringString = filteringString + " AND t.NAME = ?"; + } + + Connection conn; + PreparedStatement stmt = null; + List devices = new ArrayList<>(); + ResultSet rs = null; + try { + conn = this.getConnection(); + String sql = "SELECT d1.ID AS DEVICE_ID, d1.DESCRIPTION, d1.NAME AS DEVICE_NAME, d1.DEVICE_TYPE, " + + "d1.DEVICE_IDENTIFICATION, e.OWNER, e.OWNERSHIP, e.STATUS, e.DATE_OF_LAST_UPDATE, " + + "e.DATE_OF_ENROLMENT, e.ID AS ENROLMENT_ID FROM DM_ENROLMENT e, (SELECT d.ID, d.NAME, " + + "d.DESCRIPTION, d.DEVICE_IDENTIFICATION, t.NAME AS DEVICE_TYPE FROM DM_DEVICE d, " + + "DM_DEVICE_TYPE t WHERE d.DEVICE_TYPE_ID = t.ID AND d.TENANT_ID = ?" + filteringString + + ") d1 WHERE d1.ID = e.DEVICE_ID OFFSET ? LIMIT ?"; + + stmt = conn.prepareStatement(sql); + stmt.setInt(1, tenantId); + + int i = 1; + + if (deviceName != null && !deviceName.isEmpty()) { + stmt.setString(++i, deviceName + "%"); + } + + if (type != null && !type.isEmpty()) { + stmt.setString(++i, type); + } + + stmt.setInt(++i, offset); + stmt.setInt(++i, limit); + + rs = stmt.executeQuery(); + + while (rs.next()) { + Device device = DeviceManagementDAOUtil.loadDevice(rs); + devices.add(device); + } + } catch (SQLException e) { + throw new DeviceManagementDAOException("Error occurred while fetching the list of devices corresponding" + + "to the mentioned filtering criteria", e); + } finally { + DeviceManagementDAOUtil.cleanupResources(stmt, rs); + } + return devices; + } + private Connection getConnection() throws SQLException { return DeviceManagementDAOFactory.getConnection(); } diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/SQLServerDeviceDAOImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/SQLServerDeviceDAOImpl.java index d39bc7f52d..476b703ad8 100644 --- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/SQLServerDeviceDAOImpl.java +++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/SQLServerDeviceDAOImpl.java @@ -305,6 +305,71 @@ public class SQLServerDeviceDAOImpl extends AbstractDeviceDAOImpl { return devices; } + /** + * Get the list of devices that matches with the given device name and (or) device type. + * + * @param deviceName Name of the device. + * @param tenantId Id of the current tenant + * @return device list + * @throws DeviceManagementDAOException + */ + @Override + public List getDevicesByNameAndType(String deviceName, String type, int tenantId, int offset, int limit) + throws DeviceManagementDAOException { + + String filteringString = ""; + if (deviceName != null && !deviceName.isEmpty()) { + filteringString = filteringString + " AND d.NAME LIKE ?"; + } + + if (type != null && !type.isEmpty()) { + filteringString = filteringString + " AND t.NAME = ?"; + } + + Connection conn; + PreparedStatement stmt = null; + List devices = new ArrayList<>(); + ResultSet rs = null; + try { + conn = this.getConnection(); + String sql = "SELECT d1.ID AS DEVICE_ID, d1.DESCRIPTION, d1.NAME AS DEVICE_NAME, d1.DEVICE_TYPE, " + + "d1.DEVICE_IDENTIFICATION, e.OWNER, e.OWNERSHIP, e.STATUS, e.DATE_OF_LAST_UPDATE, " + + "e.DATE_OF_ENROLMENT, e.ID AS ENROLMENT_ID FROM DM_ENROLMENT e, (SELECT d.ID, d.NAME, " + + "d.DESCRIPTION, d.DEVICE_IDENTIFICATION, t.NAME AS DEVICE_TYPE FROM DM_DEVICE d, " + + "DM_DEVICE_TYPE t WHERE d.DEVICE_TYPE_ID = t.ID AND d.TENANT_ID = ?" + filteringString + + ") d1 WHERE d1.ID = e.DEVICE_ID OFFSET ? ROWS FETCH NEXT ? ROWS ONLY"; + + stmt = conn.prepareStatement(sql); + stmt.setInt(1, tenantId); + + int i = 1; + + if (deviceName != null && !deviceName.isEmpty()) { + stmt.setString(++i, deviceName + "%"); + } + + if (type != null && !type.isEmpty()) { + stmt.setString(++i, type); + } + + stmt.setInt(++i, offset); + stmt.setInt(++i, limit); + + rs = stmt.executeQuery(); + + while (rs.next()) { + Device device = DeviceManagementDAOUtil.loadDevice(rs); + devices.add(device); + } + } catch (SQLException e) { + throw new DeviceManagementDAOException("Error occurred while fetching the list of devices corresponding" + + "to the mentioned filtering criteria", e); + } finally { + DeviceManagementDAOUtil.cleanupResources(stmt, rs); + } + return devices; + } + private Connection getConnection() throws SQLException { return DeviceManagementDAOFactory.getConnection(); }