com.db4o.internal.handlers.array

Class ArrayHandler

java.lang.Object

com.db4o.internal.handlers.array.ArrayHandler

All Implemented Interfaces:

DeepClone, Comparable4, VariableLengthTypeHandler, VersionedTypeHandler, CascadingTypeHandler, QueryableTypeHandler, TypeHandler4, ValueTypeHandler

Direct Known Subclasses:

ArrayHandler5, MultidimensionalArrayHandler

public class ArrayHandler
extends java.lang.Object
implements CascadingTypeHandler, Comparable4, ValueTypeHandler, VariableLengthTypeHandler, VersionedTypeHandler, QueryableTypeHandler

This is the latest version, the one that should be used.

Field Summary

Fields

Modifier and Type	Field and Description
protected ArrayVersionHelper	_versionHelper

Constructor Summary

Constructors

Constructor and Description
ArrayHandler()
ArrayHandler(TypeHandler4 handler, boolean usePrimitiveClassReflector)

Method Summary

Methods

Modifier and Type	Method and Description
Iterator4	allElements(ObjectContainerBase container, java.lang.Object a_object)
static Iterator4	allElements(ReflectArray reflectArray, java.lang.Object array)
protected void	analyze(ObjectContainerBase container, java.lang.Object obj, ArrayInfo info)
protected void	analyzeDimensions(ObjectContainerBase container, java.lang.Object obj, ArrayInfo info)
protected ReflectArray	arrayReflector(ObjectContainerBase container)
void	cascadeActivation(ActivationContext context) will be called during activation if the handled object is already active
protected int	classIDFromInfo(ObjectContainerBase container, ArrayInfo info)
int	classIdToMarshalledClassId(int classID, boolean primitive)
protected ReflectClass	classReflector(Reflector reflector, ClassMetadata classMetadata, boolean isPrimitive)
void	collectIDs(QueryingReadContext context) will be called during querying to ask for IDs of member objects of the handled object.
protected ArrayVersionHelper	createVersionHelper()
java.lang.Object	deepClone(java.lang.Object context) The parameter allows passing one new object so parent references can be corrected on children.
void	defragment(DefragmentContext context) gets called when an object gets defragmented.
void	defragmentSlot(DefragmentContext context)
TypeHandler4	delegateTypeHandler()
void	delete(DeleteContext context) gets called when an object gets deleted.
void	deletePrimitiveEmbedded(StatefulBuffer buffer, PrimitiveTypeMetadata classPrimitive)
boolean	descendsIntoMembers()
boolean	equals(java.lang.Object obj)
protected ArrayInfo	forEachElement(AbstractBufferContext context, java.lang.Runnable elementRunnable)
protected boolean	handleAsByteArray(BufferContext context)
protected boolean	handleAsByteArray(java.lang.Object obj)
int	hashCode()
protected boolean	hasNullBitmap(ArrayInfo info)
byte	identifier()
protected boolean	isPreVersion0Format(int elementCount)
protected boolean	isPrimitive(Reflector reflector, ReflectClass claxx, ClassMetadata classMetadata)
static Iterator4	iterator(ReflectClass claxx, java.lang.Object obj)
int	linkLength()
protected ArrayInfo	newArrayInfo()
protected java.lang.Object	newInstance(ReflectArray arrayReflector, ArrayInfo info, ReflectClass clazz)
protected ReflectClass	newInstanceReflectClass(Reflector reflector, ArrayInfo info)
protected BitMap4	nullItemsMap(ReflectArray reflector, java.lang.Object array)
PreparedComparison	prepareComparison(Context context, java.lang.Object obj) creates a prepared comparison to compare multiple objects against one single object.
ReflectClass	primitiveClassReflector(Reflector reflector)
java.lang.Object	read(ReadContext context) gets called when an value type is to be read from the database.
TypeHandler4	readCandidateHandler(QueryingReadContext context) will be called during querying to ask for the handler to be used to collect children of the handled object
protected java.lang.Object	readCreate(Transaction trans, ReadBuffer buffer, ArrayInfo info)
protected void	readDimensions(ArrayInfo info, ReadBuffer buffer)
protected void	readElements(ReadContext context, ArrayInfo info, java.lang.Object array)
protected void	readInfo(Transaction trans, ReadBuffer buffer, ArrayInfo info)
protected void	readInto(ReadContext context, ArrayInfo info, java.lang.Object array)
protected BitMap4	readNullBitmap(ReadBuffer context, int length)
java.lang.String	toString()
TypeHandler4	unversionedTemplate()
protected boolean	useJavaHandling()
protected void	withContent(AbstractBufferContext context, java.lang.Runnable runnable)
void	write(WriteContext context, java.lang.Object obj) gets called when an object is to be written to the database.
protected void	writeDimensions(WriteContext context, ArrayInfo info)
protected void	writeElements(WriteContext context, java.lang.Object obj, ArrayInfo info)
protected void	writeInfo(WriteContext context, ArrayInfo info)

Methods inherited from class java.lang.Object

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

Field Detail

_versionHelper

protected final ArrayVersionHelper _versionHelper

Constructor Detail

ArrayHandler

public ArrayHandler()

ArrayHandler

public ArrayHandler(TypeHandler4 handler,
            boolean usePrimitiveClassReflector)

Method Detail

createVersionHelper

protected ArrayVersionHelper createVersionHelper()

arrayReflector

protected ReflectArray arrayReflector(ObjectContainerBase container)

allElements

public Iterator4 allElements(ObjectContainerBase container,
                    java.lang.Object a_object)

allElements

public static Iterator4 allElements(ReflectArray reflectArray,
                    java.lang.Object array)

cascadeActivation

public final void cascadeActivation(ActivationContext context)

Description copied from interface: CascadingTypeHandler

will be called during activation if the handled object is already active

Specified by:

cascadeActivation in interface CascadingTypeHandler

collectIDs

public void collectIDs(QueryingReadContext context)

Description copied from interface: CascadingTypeHandler

will be called during querying to ask for IDs of member objects of the handled object.

Specified by:

collectIDs in interface CascadingTypeHandler

forEachElement

protected ArrayInfo forEachElement(AbstractBufferContext context,
                       java.lang.Runnable elementRunnable)

withContent

protected void withContent(AbstractBufferContext context,
               java.lang.Runnable runnable)

delete

public void delete(DeleteContext context)
            throws Db4oIOException

Description copied from interface: TypeHandler4

gets called when an object gets deleted.

Specified by:

delete in interface TypeHandler4

Throws:

Db4oIOException

deletePrimitiveEmbedded

public final void deletePrimitiveEmbedded(StatefulBuffer buffer,
                           PrimitiveTypeMetadata classPrimitive)

Parameters:

classPrimitive -

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

handleAsByteArray

protected boolean handleAsByteArray(java.lang.Object obj)

identifier

public byte identifier()

primitiveClassReflector

public ReflectClass primitiveClassReflector(Reflector reflector)

readCreate

protected java.lang.Object readCreate(Transaction trans,
                          ReadBuffer buffer,
                          ArrayInfo info)

newInstance

protected final java.lang.Object newInstance(ReflectArray arrayReflector,
                           ArrayInfo info,
                           ReflectClass clazz)

newInstanceReflectClass

protected final ReflectClass newInstanceReflectClass(Reflector reflector,
                                   ArrayInfo info)

readCandidateHandler

public TypeHandler4 readCandidateHandler(QueryingReadContext context)

Description copied from interface: CascadingTypeHandler

will be called during querying to ask for the handler to be used to collect children of the handled object

Specified by:

readCandidateHandler in interface CascadingTypeHandler

Returns:

readInfo

protected void readInfo(Transaction trans,
            ReadBuffer buffer,
            ArrayInfo info)

readDimensions

protected void readDimensions(ArrayInfo info,
                  ReadBuffer buffer)

isPreVersion0Format

protected boolean isPreVersion0Format(int elementCount)

classReflector

protected final ReflectClass classReflector(Reflector reflector,
                          ClassMetadata classMetadata,
                          boolean isPrimitive)

iterator

public static Iterator4 iterator(ReflectClass claxx,
                 java.lang.Object obj)

useJavaHandling

protected boolean useJavaHandling()

classIDFromInfo

protected int classIDFromInfo(ObjectContainerBase container,
                  ArrayInfo info)

classIdToMarshalledClassId

public final int classIdToMarshalledClassId(int classID,
                             boolean primitive)

isPrimitive

protected final boolean isPrimitive(Reflector reflector,
                  ReflectClass claxx,
                  ClassMetadata classMetadata)

defragment

public void defragment(DefragmentContext context)

Description copied from interface: TypeHandler4

gets called when an object gets defragmented.

Specified by:

defragment in interface TypeHandler4

defragmentSlot

public final void defragmentSlot(DefragmentContext context)

handleAsByteArray

protected boolean handleAsByteArray(BufferContext context)

read

public java.lang.Object read(ReadContext context)

Description copied from interface: ValueTypeHandler

gets called when an value type is to be read from the database.

Specified by:

read in interface ValueTypeHandler

Returns:

the read value type

readElements

protected void readElements(ReadContext context,
                ArrayInfo info,
                java.lang.Object array)

newArrayInfo

protected ArrayInfo newArrayInfo()

readInto

protected final void readInto(ReadContext context,
            ArrayInfo info,
            java.lang.Object array)

readNullBitmap

protected BitMap4 readNullBitmap(ReadBuffer context,
                     int length)

hasNullBitmap

protected final boolean hasNullBitmap(ArrayInfo info)

write

public void write(WriteContext context,
         java.lang.Object obj)

Description copied from interface: TypeHandler4

gets called when an object is to be written to the database.

Specified by:

write in interface TypeHandler4

obj - the object

writeElements

protected void writeElements(WriteContext context,
                 java.lang.Object obj,
                 ArrayInfo info)

writeInfo

protected void writeInfo(WriteContext context,
             ArrayInfo info)

writeDimensions

protected void writeDimensions(WriteContext context,
                   ArrayInfo info)

analyze

protected final void analyze(ObjectContainerBase container,
           java.lang.Object obj,
           ArrayInfo info)

analyzeDimensions

protected void analyzeDimensions(ObjectContainerBase container,
                     java.lang.Object obj,
                     ArrayInfo info)

nullItemsMap

protected BitMap4 nullItemsMap(ReflectArray reflector,
                   java.lang.Object array)

prepareComparison

public PreparedComparison prepareComparison(Context context,
                                   java.lang.Object obj)

Description copied from interface: Comparable4

creates a prepared comparison to compare multiple objects against one single object.

Specified by:

prepareComparison in interface Comparable4

Parameters:

context - the context of the comparison

obj - the object that is to be compared against multiple other objects

Returns:

the prepared comparison

linkLength

public int linkLength()

unversionedTemplate

public TypeHandler4 unversionedTemplate()

Specified by:

unversionedTemplate in interface VersionedTypeHandler

deepClone

public java.lang.Object deepClone(java.lang.Object context)

Description copied from interface: DeepClone

The parameter allows passing one new object so parent references can be corrected on children.

Specified by:

deepClone in interface DeepClone

delegateTypeHandler

public TypeHandler4 delegateTypeHandler()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

descendsIntoMembers

public boolean descendsIntoMembers()

Specified by:

descendsIntoMembers in interface QueryableTypeHandler