buildframework/helium/sf/java/metadata/src/com/nokia/helium/metadata/model/metadata/SysdefComponentDAO.java
/*
* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:
*
*/
package com.nokia.helium.metadata.model.metadata;
import java.util.Hashtable;
import java.util.Map;
import javax.persistence.NoResultException;
import javax.persistence.TypedQuery;
import com.nokia.helium.metadata.JpaDAO;
/**
* Implements DAO for the Component.
* Contains all helpers related to Component manipulation.
*
*/
public class SysdefComponentDAO extends JpaDAO<SysdefComponent> {
/**
* Get a map of components rows based on the component name.
* @return a map of (componentName, component).
*/
public Map<String, SysdefComponent> getComponents() {
Map<String, SysdefComponent> result = new Hashtable<String, SysdefComponent>();
for (SysdefComponent component : this.getEntityManager().createQuery("SELECT c from SysdefComponent c", SysdefComponent.class).getResultList()) {
result.put(component.getComponentId(), component);
}
return result;
}
/**
* Get a component based on its model Id.
* @param id
* @return the entity representing the component of null if not found.
*/
public SysdefComponent getComponentById(String id) {
TypedQuery<SysdefComponent> query = this.getEntityManager().createQuery("SELECT c from SysdefComponent c where c.componentId=?1", SysdefComponent.class);
query.setParameter(1, id);
try {
return query.getSingleResult();
} catch (NoResultException ex) {
return null;
}
}
}