com.blazebit.persistence.spi

Interface ExtendedAttribute<X,Y>

Type Parameters:

X - The Java type represented by the managed type owning the attribute

Y - The Java element type of the attribute

public interface ExtendedAttribute<X,Y>

This is a wrapper around the JPA Attribute that allows additionally efficient access to properties of the metamodel.

Since:

1.2.0

Author:

Christian Beikov

Method Summary

Modifier and Type	Method and Description
javax.persistence.metamodel.Attribute<X,?>	getAttribute() Returns the underlying attribute.
List<javax.persistence.metamodel.Attribute<?,?>>	getAttributePath() Returns the path from the owning entity type to this attribute.
String[]	getColumnNames() Returns the column names of the attribute.
String[]	getColumnTypes() Returns the SQL column type names of the attribute.
Class<Y>	getElementClass() Returns the element type of the attribute.
JoinTable	getJoinTable() If the attribute is a collection that uses a join table, returns it's descriptor.
JpaProvider.ConstraintType	getJoinTypeIndexedRequiresTreatFilter(JoinType joinType) Returns where to put treat filters for a treat joined association of this attribute.
String	getMappedBy() If the attribute is an inverse collection, the mapped by attribute name is returned.
Map<String,String>	getWritableMappedByMappings(javax.persistence.metamodel.EntityType<?> inverseType) If the attribute is insertable = false and updatable = false it returns the writable mappings for the inverse type.
boolean	hasCascadingDeleteCycle() Returns whether the type of the attribute causes a cascading delete cycle.
boolean	isBag() Whether the attribute is a non-indexed and non-ordered collection a.k.a. a bag.
boolean	isColumnShared() Whether columns for the attribute are shared between multiple subtypes or shared by occupying the same slot in the resulting SQL.
boolean	isDeleteCascaded() Whether delete cascading is activated for the attribute.
boolean	isForeignJoinColumn() Whether the join columns for the attribute are in a foreign table.
boolean	isOrphanRemoval() Whether orphan removal is activated for the attribute.

Method Detail

getAttribute

javax.persistence.metamodel.Attribute<X,?> getAttribute()

Returns the underlying attribute.

Returns:

The attribute

getAttributePath

List<javax.persistence.metamodel.Attribute<?,?>> getAttributePath()

Returns the path from the owning entity type to this attribute.

Returns:

The path to the attribute

getElementClass

Class<Y> getElementClass()

Returns the element type of the attribute.

Returns:

The element type

hasCascadingDeleteCycle

boolean hasCascadingDeleteCycle()

Returns whether the type of the attribute causes a cascading delete cycle.

Returns:

True if it has a cascading delete cycle, false otherwise

isForeignJoinColumn

boolean isForeignJoinColumn()

Whether the join columns for the attribute are in a foreign table.

Returns:

True if join columns are in a foreign table, false otherwise

isColumnShared

boolean isColumnShared()

Whether columns for the attribute are shared between multiple subtypes or shared by occupying the same slot in the resulting SQL.

Returns:

True if columns of the attribute are shared, false otherwise

isBag

boolean isBag()

Whether the attribute is a non-indexed and non-ordered collection a.k.a. a bag.

Returns:

True if it is a bag, false otherwise

isOrphanRemoval

boolean isOrphanRemoval()

Whether orphan removal is activated for the attribute.

Returns:

True if orphan removal is activated, else false

isDeleteCascaded

boolean isDeleteCascaded()

Whether delete cascading is activated for the attribute.

Returns:

True if delete cascading is activated, else false

getJoinTypeIndexedRequiresTreatFilter

JpaProvider.ConstraintType getJoinTypeIndexedRequiresTreatFilter(JoinType joinType)

Returns where to put treat filters for a treat joined association of this attribute.

Parameters:

joinType - The join type used for the treat join

Returns:

The constraint type for the treat filter

getWritableMappedByMappings

Map<String,String> getWritableMappedByMappings(javax.persistence.metamodel.EntityType<?> inverseType)

If the attribute is insertable = false and updatable = false it returns the writable mappings for the inverse type. Otherwise returns null.

Parameters:

inverseType - The type containing the inverse relation

Returns:

The writable mappings for the inverse type if the attribute is not insertable or updatable, null otherwise

getMappedBy

String getMappedBy()

If the attribute is an inverse collection, the mapped by attribute name is returned. Otherwise returns null.

Returns:

The mapped by attribute name if the attribute is an inverse collection, null otherwise

getJoinTable

JoinTable getJoinTable()

If the attribute is a collection that uses a join table, returns it's descriptor. Otherwise returns null.

Returns:

The join table information if the attribute has one, null otherwise

getColumnNames

String[] getColumnNames()

Returns the column names of the attribute.

Returns:

The column names of the attribute

getColumnTypes

String[] getColumnTypes()

Returns the SQL column type names of the attribute.

Returns:

The SQL column type names for the attribute