it.unimi.dico.islab.idbs2.cloud.session

Class CloudManager

java.lang.Object

it.unimi.dico.islab.idbs2.cloud.session.CloudManager

public class CloudManager
extends Object

Manages object saving and querying for Cloud wrapper. This class contains most used interrogations and methods for saving an object of Cloud class.

IMPORTANT: this class has no public constructor. A singleton instance of this class is contained in AbstractSessionManager class

Author:

Vegeziel

Method Summary

Methods

Modifier and Type	Method and Description
Set<Cloud>	getAllClouds() Fetch all the cloud present on the connected database.
Cloud	getCloudById(Integer id) Fetch the Cloud object with the given id.
protected static CloudManager	getCloudManager()
Boolean	removeCloud(Integer id) Removes the cloud identified by id
void	saveOrUpdate(Cloud cloud) Give persistence to this Cloud object using associated Hibernate mappings.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getCloudManager

protected static CloudManager getCloudManager()

saveOrUpdate

public void saveOrUpdate(Cloud cloud)

Give persistence to this Cloud object using associated Hibernate mappings.

This method executes the saveOrUpdate method of the Hibernate Session. As Cloud is the main class of this package, by saving this object a cascade save is started for all connected objects (nodes, edges, and all classes connected to them).

getCloudById

public Cloud getCloudById(Integer id)

Fetch the Cloud object with the given id.

Parameters:

id - the identifier of the required Cloud.

Returns:

a Cloud C having id as identifier if such Cloud exists, null otherwise.

getAllClouds

public Set<Cloud> getAllClouds()

Fetch all the cloud present on the connected database.

Returns:

a set of all available clouds.

removeCloud

public Boolean removeCloud(Integer id)

Removes the cloud identified by id

Parameters:

id - the identifier of the Cloud to be removed.

Returns:

• true: if the Cloud identified by id has been removed correctly.
• false: if something went wrong (no Cloud deleted or more than one Clouds deleted.