org.fastnate.generator.context

Class EntityProperty<E,T>

java.lang.Object

org.fastnate.generator.context.Property<E,T>

org.fastnate.generator.context.SingularProperty<E,T>

org.fastnate.generator.context.EntityProperty<E,T>

Type Parameters:

E - The type of the container entity

T - The type of the target entity

public class EntityProperty<E,T>
extends SingularProperty<E,T>

Describes a property of an EntityClass that references another entity.

Author:

Tobias Liefke

Constructor Summary

Constructors

Constructor and Description
EntityProperty(GeneratorContext context, AttributeAccessor attribute, javax.persistence.AssociationOverride override) Creates a new instance of EntityProperty.

Method Summary

Modifier and Type	Method and Description
void	addInsertExpression(E entity, InsertStatement statement) Adds an expression according to the current value of the property for the given entity to an SQL insert statement.
Collection<?>	findReferencedEntities(E entity) Finds all entities in the current property, that are referenced.
List<EntityStatement>	generatePendingStatements(E entity, Object writtenEntity, Object... arguments) Generates the update statements for an entity that are required after another entity was generated.
String	getExpression(E entity, boolean whereExpression) Creates the expression for the current value of the given entity in SQL.
String	getPredicate(E entity) Creates an SQL predicate that references all entities that have the same value as the given entity.
boolean	isTableColumn() Indicates that this property maps to a column from the parent table.

Methods inherited from class org.fastnate.generator.context.SingularProperty

getColumn

Methods inherited from class org.fastnate.generator.context.Property

createPostInsertStatements, createPreInsertStatements, failIfRequired, getName, getValue, isRequired, setValue, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

EntityProperty

public EntityProperty(GeneratorContext context,
                      AttributeAccessor attribute,
                      @Nullable
                      javax.persistence.AssociationOverride override)

Creates a new instance of EntityProperty.

Parameters:

context - the generator context.

attribute - the accessor of the attribute

override - optional AttributeOverride configuration.

Method Detail

addInsertExpression

public void addInsertExpression(E entity,
                                InsertStatement statement)

Description copied from class: Property

Adds an expression according to the current value of the property for the given entity to an SQL insert statement.

Overrides:

addInsertExpression in class Property<E,T>

Parameters:

entity - the inspected entity

statement - the created statement

findReferencedEntities

public Collection<?> findReferencedEntities(E entity)

Description copied from class: Property

Finds all entities in the current property, that are referenced.

Overrides:

findReferencedEntities in class Property<E,T>

Parameters:

entity - the inspected entity

Returns:

all referenced entities

generatePendingStatements

public List<EntityStatement> generatePendingStatements(E entity,
                                                       Object writtenEntity,
                                                       Object... arguments)

Description copied from class: Property

Generates the update statements for an entity that are required after another entity was generated. Only called, if EntityClass.markPendingUpdates(E, V, org.fastnate.generator.context.Property<V, ?>, java.lang.Object...) was called before for writtenEntity

Overrides:

generatePendingStatements in class Property<E,T>

Parameters:

entity - the entity that needs to be updated

writtenEntity - the entity that exists now in the database

arguments - additional arguments that where given to markPendingUpdates

Returns:

the list of pending statements

getExpression

public String getExpression(E entity,
                            boolean whereExpression)

Description copied from class: Property

Creates the expression for the current value of the given entity in SQL.

Overrides:

getExpression in class Property<E,T>

Parameters:

entity - the entity

whereExpression - indicates that the expression is used in a "where" statement

Returns:

the expression for the value of this property or null if no exists

getPredicate

public String getPredicate(E entity)

Description copied from class: Property

Creates an SQL predicate that references all entities that have the same value as the given entity. Used to reference entites by their (unique) properties or ids.

Overrides:

getPredicate in class Property<E,T>

Parameters:

entity - the entity

Returns:

the predicate for the value of that entity or null if no such expression is available

isTableColumn

public boolean isTableColumn()

Description copied from class: Property

Indicates that this property maps to a column from the parent table.

Overrides:

isTableColumn in class SingularProperty<E,T>

Returns:

true if Property.addInsertExpression(Object, InsertStatement) will add the corresponding value to the given statement