org.hibernate.tuple

Interface Tuplizer

All Known Subinterfaces:

ComponentTuplizer, EntityTuplizer

All Known Implementing Classes:

AbstractComponentTuplizer, AbstractEntityTuplizer, DynamicMapComponentTuplizer, DynamicMapEntityTuplizer, PojoComponentTuplizer, PojoEntityTuplizer

public interface Tuplizer

A tuplizer defines the contract for things which know how to manage a particular representation of a piece of data, given that representation's EntityMode (the entity-mode essentially defining which representation).

If that given piece of data is thought of as a data structure, then a tuplizer is the thing which knows how to

• create such a data structure appropriately
• extract values from and inject values into such a data structure

For example, a given piece of data might be represented as a POJO class. Here, it's representation and entity-mode is POJO. Well a tuplizer for POJO entity-modes would know how to

• create the data structure by calling the POJO's constructor
• extract and inject values through getters/setter, or by direct field access, etc

That same piece of data might also be represented as a DOM structure, using the tuplizer associated with the DOM4J entity-mode, which would generate instances of Element as the data structure and know how to access the values as either nested Elements or as Attributes.

See Also:

EntityTuplizer, ComponentTuplizer

Method Summary

Modifier and Type	Method and Description
Getter	getGetter(int i) Retrieve the getter for the specified property.
java.lang.Class	getMappedClass() Return the pojo class managed by this tuplizer.
java.lang.Object	getPropertyValue(java.lang.Object entity, int i) Extract the value of a particular property from the given entity.
java.lang.Object[]	getPropertyValues(java.lang.Object entity) Extract the current values contained on the given entity.
java.lang.Object	instantiate() Generate a new, empty entity.
boolean	isInstance(java.lang.Object object) Is the given object considered an instance of the the entity (acconting for entity-mode) managed by this tuplizer.
void	setPropertyValues(java.lang.Object entity, java.lang.Object[] values) Inject the given values into the given entity.

Method Detail

getPropertyValues

java.lang.Object[] getPropertyValues(java.lang.Object entity)

Extract the current values contained on the given entity.

Parameters:

entity - The entity from which to extract values.

Returns:

The current property values.

setPropertyValues

void setPropertyValues(java.lang.Object entity,
                       java.lang.Object[] values)

Inject the given values into the given entity.

Parameters:

entity - The entity.

values - The values to be injected.

getPropertyValue

java.lang.Object getPropertyValue(java.lang.Object entity,
                                  int i)

Extract the value of a particular property from the given entity.

Parameters:

entity - The entity from which to extract the property value.

i - The index of the property for which to extract the value.

Returns:

The current value of the given property on the given entity.

instantiate

java.lang.Object instantiate()

Generate a new, empty entity.

Returns:

The new, empty entity instance.

isInstance

boolean isInstance(java.lang.Object object)

Is the given object considered an instance of the the entity (acconting for entity-mode) managed by this tuplizer.

Parameters:

object - The object to be checked.

Returns:

True if the object is considered as an instance of this entity within the given mode.

getMappedClass

java.lang.Class getMappedClass()

Return the pojo class managed by this tuplizer.

Need to determine how to best handle this for the Tuplizers for EntityModes other than POJO.

todo : be really nice to not have this here since it is essentially pojo specific...

Returns:

The persistent class.

getGetter

Getter getGetter(int i)

Retrieve the getter for the specified property.

Parameters:

i - The property index.

Returns:

The property getter.