Tuplizer (Hibernate JavaDocs)
Date: 2012-04-05

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## 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 `Element`s or as `Attribute`s.

See Also:
  `EntityTuplizer`, `ComponentTuplizer`

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

Method Detail

### getPropertyValues

    Object[] getPropertyValues(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(Object entity,
                           Object[] values)

  Inject the given values into the given entity.

  Parameters:
    `entity` - The entity.
    `values` - The values to be injected.

### getPropertyValue

    Object getPropertyValue(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

    Object instantiate()

  Generate a new, empty entity.

  Returns:
    The new, empty entity instance.

### isInstance

    boolean isInstance(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

    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.

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