Class AttachFieldManager

java.lang.Object
org.datanucleus.store.fieldmanager.AbstractFieldManager
org.datanucleus.store.fieldmanager.AttachFieldManager
All Implemented Interfaces:
FieldManager
public class AttachFieldManager extends AbstractFieldManager
Utility class to handle the attach of fields. The attachment process has 2 distinct cases to cater for.
  1. The object was detached, has been updated, and needs reattaching.
  2. The object was detached from a different datastore, and is being attached here and we want to do a pass through the object to update the fields in the object before it is persisted
In the first case, the fields which are specified have their values (and dirty flags) updated. In the second case, all fields have their fields (and dirty flags) updated. In addition this field manager allows attaching a copy, or attaching in-situ.

  • Field Details

    • attachedSM

      private final DNStateManager attachedSM
      StateManager for the attached instance

    • secondClassMutableFields

      private final boolean[] secondClassMutableFields
      The second class mutable fields.

    • dirtyFields

      private final boolean[] dirtyFields
      Fields that were marked as dirty at attach.

    • persistent

      private final boolean persistent
      Whether the attached instance is persistent yet.

    • cascadeAttach

      private final boolean cascadeAttach
      Whether to cascade the attach to related fields.

    • copy

      boolean copy
      Whether we should create attached copies, or attach in situ.

  • Constructor Details

    • AttachFieldManager

      public AttachFieldManager(DNStateManager attachedSM, boolean[] secondClassMutableFields, boolean[] dirtyFields, boolean persistent, boolean cascadeAttach, boolean copy)
      Constructor.
      Parameters:
      attachedSM - StateManager for the attached instance
      secondClassMutableFields - second class mutable field flags
      dirtyFields - Flags for whether the field(s) are dirty
      persistent - whether the object being "attached" is persistent (yet)
      cascadeAttach - Whether to cascade any attach calls to related fields
      copy - Whether to attach copy

  • Method Details

    • storeObjectField

      public void storeObjectField(int fieldNumber, Object value)
      Method to store an object field into the attached instance.
      Specified by:
      storeObjectField in interface FieldManager
      Overrides:
      storeObjectField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field to store
      value - the value in the detached instance

    • storeBooleanField

      public void storeBooleanField(int fieldNumber, boolean value)
      Description copied from interface: FieldManager
      Method to store a boolean field value in the object at the specified field position.
      Specified by:
      storeBooleanField in interface FieldManager
      Overrides:
      storeBooleanField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field
      value - value to store

    • storeByteField

      public void storeByteField(int fieldNumber, byte value)
      Description copied from interface: FieldManager
      Method to store a byte field value in the object at the specified field position.
      Specified by:
      storeByteField in interface FieldManager
      Overrides:
      storeByteField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field
      value - value to store

    • storeCharField

      public void storeCharField(int fieldNumber, char value)
      Description copied from interface: FieldManager
      Method to store a char field value in the object at the specified field position.
      Specified by:
      storeCharField in interface FieldManager
      Overrides:
      storeCharField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field
      value - value to store

    • storeDoubleField

      public void storeDoubleField(int fieldNumber, double value)
      Description copied from interface: FieldManager
      Method to store a double field value in the object at the specified field position.
      Specified by:
      storeDoubleField in interface FieldManager
      Overrides:
      storeDoubleField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field
      value - value to store

    • storeFloatField

      public void storeFloatField(int fieldNumber, float value)
      Description copied from interface: FieldManager
      Method to store a float field value in the object at the specified field position.
      Specified by:
      storeFloatField in interface FieldManager
      Overrides:
      storeFloatField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field
      value - value to store

    • storeIntField

      public void storeIntField(int fieldNumber, int value)
      Description copied from interface: FieldManager
      Method to store an int field value in the object at the specified field position.
      Specified by:
      storeIntField in interface FieldManager
      Overrides:
      storeIntField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field
      value - value to store

    • storeLongField

      public void storeLongField(int fieldNumber, long value)
      Description copied from interface: FieldManager
      Method to store a long field value in the object at the specified field position.
      Specified by:
      storeLongField in interface FieldManager
      Overrides:
      storeLongField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field
      value - value to store

    • storeShortField

      public void storeShortField(int fieldNumber, short value)
      Description copied from interface: FieldManager
      Method to store a short field value in the object at the specified field position.
      Specified by:
      storeShortField in interface FieldManager
      Overrides:
      storeShortField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field
      value - value to store

    • storeStringField

      public void storeStringField(int fieldNumber, String value)
      Description copied from interface: FieldManager
      Method to store a string field value in the object at the specified field position.
      Specified by:
      storeStringField in interface FieldManager
      Overrides:
      storeStringField in class AbstractFieldManager
      Parameters:
      fieldNumber - Number of the field
      value - value to store