Package com.db4o.internal

Class VirtualFieldMetadata

java.lang.Object

com.db4o.internal.ClassAspect

com.db4o.internal.FieldMetadata

com.db4o.internal.VirtualFieldMetadata

All Implemented Interfaces:

StoredField

Direct Known Subclasses:

CommitTimestampFieldMetadata, UUIDFieldMetadata, VersionFieldMetadata

public abstract class VirtualFieldMetadata
extends FieldMetadata

TODO: refactor for symmetric inheritance - don't inherit from YapField and override, instead extract an abstract superclass from YapField and let both YapField and this class implement

Field Summary

Fields inherited from class com.db4o.internal.FieldMetadata

_fieldType, _fieldTypeID, _isArray

Fields inherited from class com.db4o.internal.ClassAspect

_handle

Method Summary

Modifier and Type	Method	Description
void	activate(UnmarshallingContext context)
abstract void	addFieldIndex(ObjectIdContextImpl context)
boolean	alive()
boolean	canBeDisabled()
boolean	canUseNullBitmap()
ReflectClass	classReflector(Reflector reflector)
void	deactivate(ActivationContext context)
abstract void	delete(DeleteContextImpl context, boolean isUpdate)
TypeHandler4	getHandler()
java.lang.Object	getOrCreate(Transaction a_trans, java.lang.Object a_OnObject)	dirty hack for com.db4o.types some of them (BlobImpl) need to be set automatically TODO: Derive from FieldMetadata for Db4oTypes
protected java.lang.Object	indexEntryFor(java.lang.Object indexEntry)
protected Indexable4	indexHandler(ObjectContainerBase stream)
boolean	isVirtual()
void	loadFieldTypeById()
void	marshall(MarshallingContext context, java.lang.Object obj)
boolean	needsArrayAndPrimitiveInfo()
void	readVirtualAttribute(ObjectReferenceContext context)

Methods inherited from class com.db4o.internal.FieldMetadata

addIndexEntry, addIndexEntry, aspectType, attemptUpdate, canLoadByIndex, canUpdateFast, cascadeActivation, cascadingTarget, coerce, collectIDs, container, containingClass, createFieldIndexKey, createIndex, defragAspect, dropIndex, dropIndex, equals, fieldType, fieldTypeID, get, get, getIndex, getName, getOn, getStoredType, hasConfig, hashCode, hasIndex, init, init, initIndex, isArray, isPrimitive, linkLength, newBTree, prepareComparison, qField, read, readIndexEntry, rebuildIndexForClass, rebuildIndexForObject, rebuildIndexForWriter, reflector, removeIndexEntry, rename, search, set, setAvailable, toString, translatorStoredClass, traverseValues, traverseValues, typeHandlerForClass, updating, wrapHandlerToArrays

Methods inherited from class com.db4o.internal.ClassAspect

checkEnabled, disableFromAspectCountVersion, incrementOffset, isEnabledOn, setHandle

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

getHandler

public TypeHandler4 getHandler()

Overrides:

getHandler in class FieldMetadata

addFieldIndex

public abstract void addFieldIndex(ObjectIdContextImpl context)
                            throws FieldIndexException

Overrides:

addFieldIndex in class FieldMetadata

Throws:

FieldIndexException

alive

public boolean alive()

Overrides:

alive in class FieldMetadata

canBeDisabled

public boolean canBeDisabled()

Overrides:

canBeDisabled in class FieldMetadata

canUseNullBitmap

public boolean canUseNullBitmap()

Overrides:

canUseNullBitmap in class FieldMetadata

classReflector

public ReflectClass classReflector(Reflector reflector)

deactivate

public void deactivate(ActivationContext context)

Overrides:

deactivate in class FieldMetadata

delete

public abstract void delete(DeleteContextImpl context,
                            boolean isUpdate)

Overrides:

delete in class FieldMetadata

getOrCreate

public java.lang.Object getOrCreate(Transaction a_trans,
                                    java.lang.Object a_OnObject)

Description copied from class: FieldMetadata

dirty hack for com.db4o.types some of them (BlobImpl) need to be set automatically TODO: Derive from FieldMetadata for Db4oTypes

Overrides:

getOrCreate in class FieldMetadata

needsArrayAndPrimitiveInfo

public boolean needsArrayAndPrimitiveInfo()

Overrides:

needsArrayAndPrimitiveInfo in class FieldMetadata

activate

public void activate(UnmarshallingContext context)

Overrides:

activate in class FieldMetadata

loadFieldTypeById

public void loadFieldTypeById()

Overrides:

loadFieldTypeById in class FieldMetadata

marshall

public void marshall(MarshallingContext context,
                     java.lang.Object obj)

Overrides:

marshall in class FieldMetadata

readVirtualAttribute

public void readVirtualAttribute(ObjectReferenceContext context)

isVirtual

public boolean isVirtual()

Overrides:

isVirtual in class ClassAspect

indexEntryFor

protected java.lang.Object indexEntryFor(java.lang.Object indexEntry)

Overrides:

indexEntryFor in class FieldMetadata

indexHandler

protected Indexable4 indexHandler(ObjectContainerBase stream)

Overrides:

indexHandler in class FieldMetadata