1 /*

     2  * Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).

     3  * All rights reserved.

     4  * This component and the accompanying materials are made available

     5  * under the terms of the License "Eclipse Public License v1.0"

     6  * which accompanies this distribution, and is available

     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8  *

     9  * Initial Contributors:

    10  * Nokia Corporation - initial contribution.

    11  *

    12  * Contributors:

    13  *

    14  * Description:  

    15  *

    16  */

    17 package com.nokia.helium.metadata.model.metadata;

    18 

    19 import java.util.Hashtable;

    20 import java.util.Map;

    21 

    22 import javax.persistence.NoResultException;

    23 import javax.persistence.TypedQuery;

    24 

    25 import com.nokia.helium.metadata.JpaDAO;

    26 

    27 /**

    28  * Implements DAO for the Component.

    29  * Contains all helpers related to Component manipulation.

    30  *

    31  */

    32 public class SysdefComponentDAO extends JpaDAO<SysdefComponent> {

    33 

    34     /**

    35      * Get a map of components rows based on the component name.

    36      * @return a map of (componentName, component).

    37      */

    38     public Map<String, SysdefComponent> getComponents() {

    39         Map<String, SysdefComponent> result = new Hashtable<String, SysdefComponent>();

    40         for (SysdefComponent component : this.getEntityManager().createQuery("SELECT c from SysdefComponent c", SysdefComponent.class).getResultList()) {

    41             result.put(component.getComponentId(), component);

    42         }

    43         return result;

    44     }

    45 

    46     /**

    47      * Get a component based on its model Id.

    48      * @param id

    49      * @return the entity representing the component of null if not found.

    50      */

    51     public SysdefComponent getComponentById(String id) {

    52         TypedQuery<SysdefComponent> query = this.getEntityManager().createQuery("SELECT c from SysdefComponent c where c.componentId=?1", SysdefComponent.class);

    53         query.setParameter(1, id);

    54         try {

    55             return query.getSingleResult();

    56         } catch (NoResultException ex) {

    57             return null;

    58         }

    59     }

    60 }