Package org.hibernate.engine.spi

Class IdentifierValue

java.lang.Object
org.hibernate.engine.spi.IdentifierValue
All Implemented Interfaces:
UnsavedValueStrategy
public class IdentifierValue extends Object implements UnsavedValueStrategy
A strategy for determining if an identifier value is an identifier of a new transient instance or a previously persistent transient instance. The strategy is determined by the unsaved-value attribute in the mapping file.

  • Field Details

    • ANY

      public static final IdentifierValue ANY
      Always assume the transient instance is newly instantiated

    • NONE

      public static final IdentifierValue NONE
      Never assume the transient instance is newly instantiated

    • NULL

      public static final IdentifierValue NULL
      Assume the transient instance is newly instantiated if the identifier is null.

    • UNDEFINED

      public static final IdentifierValue UNDEFINED
      Assume nothing.

  • Constructor Details

    • IdentifierValue

      protected IdentifierValue()

    • IdentifierValue

      public IdentifierValue(Object value)
      Assume the transient instance is newly instantiated if its identifier is null or equal to value

  • Method Details

    • isUnsaved

      public @Nullable Boolean isUnsaved(@Nullable Object id)
      Does the given identifier belong to a new instance?
      Specified by:
      isUnsaved in interface UnsavedValueStrategy
      Parameters:
      id - The value to be tested
      Returns:
      true indicates the value corresponds to unsaved data (aka, transient state); false indicates the value does not corresponds to unsaved data (aka, detached state); null indicates that this strategy was not able to determine conclusively.

    • getDefaultValue

      public @Nullable Object getDefaultValue(@Nullable Object currentValue)
      Description copied from interface: UnsavedValueStrategy
      Get a default value meant to indicate transience.
      Specified by:
      getDefaultValue in interface UnsavedValueStrategy
      Parameters:
      currentValue - The current state value.
      Returns:
      The default transience value.

    • toString

      public String toString()
      Overrides:
      toString in class Object