Package org.gcube.informationsystem.base.impl.relations

Class RelationElementImpl<S extends EntityElement,T extends EntityElement>

java.lang.Object

org.gcube.informationsystem.base.impl.ElementImpl

org.gcube.informationsystem.base.impl.relations.RelationElementImpl<S,T>

Type Parameters:

S - The type of the source entity.

T - The type of the target entity.

All Implemented Interfaces:

Serializable, Element, IdentifiableElement, RelationElement<S,T>

Direct Known Subclasses:

IsParentOfImpl, RelationImpl

public abstract class RelationElementImpl<S extends EntityElement,T extends EntityElement>
extends ElementImpl
implements RelationElement<S,T>

The default implementation of the RelationElement interface.

Author:

Luca Frosini (ISTI - CNR)

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected Metadata	metadata	The metadata of the relation.
protected S	source	The source of the relation.
protected T	target	The target of the relation.
protected UUID	uuid	The UUID of the relation.

Fields inherited from interface org.gcube.informationsystem.base.reference.Element

DATETIME_PATTERN, NAME, TYPE_PROPERTY

Fields inherited from interface org.gcube.informationsystem.base.reference.IdentifiableElement

ID_PROPERTY, METADATA_PROPERTY

Fields inherited from interface org.gcube.informationsystem.base.reference.relations.RelationElement

NAME, SOURCE_PROPERTY, TARGET_PROPERTY

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RelationElementImpl()	Default constructor.
protected	RelationElementImpl(S source, T target)	Constructs a new relation with the specified source and target entities.

Method Summary

Modifier and Type	Method	Description
UUID	getID()	Returns the unique identifier (UUID) of the element.
Metadata	getMetadata()	Returns the metadata associated with the element.
S	getSource()	Returns the source entity of the relation.
T	getTarget()	Returns the target entity of the relation.
void	setID(UUID uuid)	Sets the unique identifier (UUID) for the element.
void	setMetadata(Metadata metadata)	Sets the metadata for the element.
void	setSource(S source)	Sets the source entity of the relation.
void	setTarget(T target)	Sets the target entity of the relation.

Methods inherited from class org.gcube.informationsystem.base.impl.ElementImpl

getTypeName, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.gcube.informationsystem.base.reference.Element

getTypeName

Field Details

uuid

protected UUID uuid

The UUID of the relation.

metadata

protected Metadata metadata

The metadata of the relation.

source

protected S extends EntityElement source

The source of the relation.

target

protected T extends EntityElement target

The target of the relation.

Constructor Details

RelationElementImpl

protected RelationElementImpl()

Default constructor.

RelationElementImpl

protected RelationElementImpl(S source,
 T target)

Constructs a new relation with the specified source and target entities.

Parameters:

source - The source entity of the relation.

target - The target entity of the relation.

Method Details

getID

public UUID getID()

Returns the unique identifier (UUID) of the element.

This UUID is used to uniquely identify the relation instance. It is read-only, mandatory, and cannot be null.

Specified by:

getID in interface IdentifiableElement

Specified by:

getID in interface RelationElement<S extends EntityElement,T extends EntityElement>

Returns:

The UUID of the element.

setID

public void setID(UUID uuid)

Sets the unique identifier (UUID) for the element.

Specified by:

setID in interface IdentifiableElement

Specified by:

setID in interface RelationElement<S extends EntityElement,T extends EntityElement>

Parameters:

uuid - The UUID to set.

getMetadata

public Metadata getMetadata()

Returns the metadata associated with the element.

The metadata is included in JSON serialization only if it is not null.

Metadata is automatically managed by the system and is mandatory.

Specified by:

getMetadata in interface IdentifiableElement

Specified by:

getMetadata in interface RelationElement<S extends EntityElement,T extends EntityElement>

Returns:

The Metadata of the element, or null if none is set.

setMetadata

public void setMetadata(Metadata metadata)

Sets the metadata for the element.

Specified by:

setMetadata in interface IdentifiableElement

Specified by:

setMetadata in interface RelationElement<S extends EntityElement,T extends EntityElement>

Parameters:

metadata - The Metadata to associate with the element.

getSource

public S getSource()

Returns the source entity of the relation.

Specified by:

getSource in interface RelationElement<S extends EntityElement,T extends EntityElement>

Returns:

The source entity.

setSource

public void setSource(S source)

Sets the source entity of the relation.

Specified by:

setSource in interface RelationElement<S extends EntityElement,T extends EntityElement>

Parameters:

source - The source entity to set.

getTarget

public T getTarget()

Returns the target entity of the relation.

Specified by:

getTarget in interface RelationElement<S extends EntityElement,T extends EntityElement>

Returns:

The target entity.

setTarget

public void setTarget(T target)

Sets the target entity of the relation.

Specified by:

setTarget in interface RelationElement<S extends EntityElement,T extends EntityElement>

Parameters:

target - The target entity to set.